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Public Disclosure Authorized
Ministry of Regional Development and Public Works
ENVIRONMENTAL IMPACT ASSESSMENT
ON THE COMPLETION OF CONSTRUCTION WORKS FOR
NEYKOVTSI DAM
Public Disclosure Authorized
Public Disclosure Authorized
Public Disclosure Authorized
THE REPUBLIC OF BULGARIA
E1776
v17
Sofia, May 2009, Final Document
Neykovtsi Dam
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CONTENTS
І.
EXECUTIVE SUMMARY ......................................................................................................... 1
ІІ.
LEGISLATIVE AND POLITICAL SYSTEM AND ENVIRONMENTAL MANAGEMENT
ORGANIZATIONAL DIAGRAM ............................................................................................. 6
ІІІ.
OVERVIEW OF NEYKOVTSI DAM PROJECT .................................................................... 7
ІV.
OVERVIEW OF ENVIRONMENTAL COMPONENTS AND FACTORS ............................10
4.1.
AIR QUALITY .....................................................................................................................10
4.1.1 Climate ....................................................................................................................10
4.1.2 Air Quality ...............................................................................................................10
4.2.
WATER...............................................................................................................................14
SURFACE WATER...........................................................................................................14
GROUNDWATER ............................................................................................................14
4.3
GEOLOGICAL ENVIRONMENT .....................................................................................15
4.4.
SOIL ..................................................................................................................................18
4.5.
WASTE .............................................................................................................................18
4.6.
HARMFUL PHYSICAL FACTORS: NOISE .....................................................................18
4.7.
FLORA................................................................................................................................18
4.8.
FAUNA ...............................................................................................................................19
4.8.1 Ichthyofauna ............................................................................................................19
4.8.2 Invertebrate ..............................................................................................................20
4.8.3. Herpetofauna (Amphibians and reptiles) ...................................................................21
4.8.4 Mammal Fauna ........................................................................................................22
4.8.5 Ornitofauna ..............................................................................................................24
4.9.
LANDSCAPE .......................................................................................................................26
4.10. SOCIAL AND CULTURAL ENVIRONMENT. HEALTH FACTOR .................................26
4.11. CULTURAL AND HISTORICAL HERITAGE..................................................................27
V.
EVALUATION OF THE EXPECTED ENVIRONMENTAL AND SOCIAL IMPACTS
RELATED TO THE IMPLEMENTATION OF NEYKOTSI DAM .......................................27
5.1.
AIR QUALITY .....................................................................................................................27
5.1.1 Climate ....................................................................................................................27
5.1.2 Quality of atmospheric air ........................................................................................28
5.2.
WATER .............................................................................................................................30
Surface water .....................................................................................................................30
Groundwater ......................................................................................................................36
5.3.
GEOLOGICAL ENVIRONMENT .....................................................................................37
5.4.
SOILS ................................................................................................................................37
5.5.
WASTE .............................................................................................................................38
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5.6.
HARMFUL PHYSICAL FACTORS ..................................................................................41
5.7.
PLANTS ............................................................................................................................42
5.8.
ANIMALS .........................................................................................................................42
5.8.1. Ichthyofauna ............................................................................................................42
5.8.2. Invertebrate ..............................................................................................................43
5.8.3. Herpetofauna (Amphibians and reptiles) ...................................................................43
5.8.4. Mammal Fauna ........................................................................................................44
5.8.5. Ornithofauna ............................................................................................................44
5.9.
LANDSCAPE .......................................................................................................................45
5.10. HEALTH FACTOR AND SOCIAL SIGNIFICANCE ........................................................45
5.11. SAFETY OF NEYKOVTSI DAM ...............................................................................................47
5.12. TRANSBORDER EFFECT ................................................................................................51
5.13. SOCIAL IMPACT ..................................................................................................................52
VІ.
ANALYSIS OF ALTERNATIVES ...........................................................................................52
VІІ. ENVIRONMENTAL MANAGEMENT PLAN ........................................................................54
VII.A.
ENVIRONMENTAL MITIGATION PLAN...................................................................54
VІІ.B.
ENVIRONMENTAL MONITORING PLAN .................................................................57
VIII. PUBLIC HEARINGS ................................................................................................................58
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APPENDICES
Annex 1 – TOR for EIA
Annex 2 – Action Plan For Environmental Management Of Neykovtsi
Dam
3. Annex 3 – Environmental Monitoring Plan
4. Annex 4 Methodologies and Sources Used and quoted in the
Environment Impact Assessment Statement
5. Annex 5 – Wastes classification
6. Diagram ―Water supply of Tryavna‖
7. Topographic map including Neykovtsi dam 1:25 000
8. Forest map including Neykovtsi dam 1:10 000
9. Map of Protected Area Bulgarka BG 0000399
10. Photos
11. Neykovtsi Dam designs - list
12. Protocols and opinions from meetings in Tryavna municipality
in 2007 and 2009
13. Protocols of laboratory analysis of water
1.
2.
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Abbreviations used
AIM
Archaeological Institute and Museum
BAN
Bulgarian Academy of Sciences
BD
Basin Directorate
VIK
Water supply and sewerage company
EU
European Union
EEC
Expert Environmental Council
EPA
Environmental Protection Act
EEA
Environmental Executive Agency
IWI
Institute on Water Issues
IPP
Institute for research and design
MRDPW Ministry of Regional Development and Public Works
MOEW
Ministry of Environment and Water
EIA
Environmental Impact Assessment
NGO
Non Government Organizations
ALV
Admissible limit values
DWTP
Drinking water treatment plant
RIEW
Regional Inspectorate of Environment and Water
RIHSC
Regional Inspectorate on Health Safety and Control
WSS
Water supply system
CMS
Central measuring station
KOPS
Committee for Environmental Protection
BCA
Bulletin for Construction and Architecture
UF
University of Forestry
UASG
University of Construction, Architecture and Geodesy
RC
Rock crusher
MS
Methodologies and Sources
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EXECUTIVE SUMMARY
BACKGROUND
The Environmental Impact Assessment Report (EIA) on the completion of construction works for
Neykovtsi Dam has been developed following the submission of the Environmental Due Diligence Report
(EDD) prepared in 2007 by the Ministry of Regional Development and Public Works (MRDPW) to meet
the World Bank policy requirements on Environmental Assessment. This document is part of the
documentation required for approval of the World Bank assistance requested by the Government of
Bulgaria (GoB) to finance activities related to municipal infrastructure development through completion
of the Luda Yana water supply dam.
This EIA report has been developed to meet the Bank requirements as stated in the ToR (Annex I) and to
comply with the effective environmental legislation in the Republic of Bulgaria (RB).
Environmental protection is a country policy priority. Depending on the classification of infrastructure
projects they can be either subject to a mandatory EIA or subject to an assessment of the need to have an
EIA. Having a total volume of 4,80×106 m3, the Neykovtsi dam would be subject to an assessment for the
need to perform an EIA. However, because the construction works have started prior to the establishment
of the EIA procedure and the dam was already granted a construction permit (in 1978) based on which
some works started, no EIA would be required under Bulgarian law for completing this dam construction.
The construction permit is also still valid. However, an EIA is required for World Bank financing.
This EIA report presents the current normative documents of the RB that have to be complied with in the
course of work, as well as those required by the Bank. The organizational diagram referring to the
environmental management is presented in Appendices (e.g., table in Regulations).
Neykovtsi Dam Project
The construction of Neykovtsi dam started in 1978 but it was put on hold several times and completely
stopped in 2001 due to lack of financing. The dam wall and the adjoining facilities, as well as the
Drinking water treatment plant (DWTP) were constructed following the technical detailed designs
developed in accordance with the design phases effective in those years. The design has also been
developed in line with the effective regulations applicable in 1986 with regard to the security and safety
of the dam wall and the facilities thereto.
The designs of the dam wall and of the DWTP will be updated at the beginning of the proposed project
implementation, following a preliminary evaluation of the quality of the construction performed eight
years ago. Consequently, this EIA report and the Environmental Management Plan will be revised to
reflect any new relevant information regarding environmental assessment based on the the latest update of
detail design.
Environmental Baseline Conditions and Current Status of the Dam Site
The river eco system upstream of the dam will be transformed into a water reservoir as 32.5 ha will be
covered by water permanently. The dam wall, classified as ‗large‘, and requiring securing of operational
safety, will be situated above the residential area of the town of Plachkovtsi and within 7.5 km to the
south of Tryavna town (classification of dam walls by the International Committee of Large Dams
according to which dams exceeding 15 m height are classified as large).
The partially constructed Neykovtsi dam is located on the Neykovska River and is considered a multiannual compensating basin. The run-off of the river is uneven in seasonal terms and naturally has a very
low or even zero flow for part of the year, especially during summer time. Currently, the natural flow of
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the river is unimpeded because its flow is maintained through an outlet constructed beneath the partially
completed dam. During the construction, filling and operation of the dam, an environmental flow will be
maintained. The volume of this flow, which will vary seasonally to approximate the natural hydrology,
has been calculated, using an accepted methodology, to maintain good environmental conditions
downstream. The construction and operation of the dam will not have a negative impact on any protected
habitats or sensitive ecosystems. According to latest information from the MoEW, only the sanitaryprotectied zones will be within PA Bulgarka. Complete details of the size and extent of the reservoir will
only be known when the detailed designs are completed. Another Natura 2000 site located in the
proximity of the dam area is the Protected Area Dryanovska reka (code BG 000282) but the dam and
reservoir will be located outside this protected area. The purpose of the sanitary-protected zone of the
dam is to maintain natural vegetation cover to prevent erosion and sedimentation or pollution of the
reservoir water. According to MoEW, the management regime of the sanitary-protected zone of the dam
is consistent with the goals of the Natura 2000 and favorable to the management of protected area. Also,
there are no endangered or protected species which will be adversely affected by the change in the
hydrological regime resulting from construction and operation of the dam.
The status of the environment surrounding the Neikovtsi dam site has been evaluated based on inspection
of the territory, field research, review of the available technical data provided by the Regional
Inspectorate of Environment and Water (RIEW) in the town of Veliko Turnovo, other existing relvant
literature and survey data.
The area of the Neikovtsi Dam is not in a natural state but has been significantly impacted by the
construction works which were carried out in the past and then stopped due to lack of funds. The
construction of the dam wall has been implemented up to 16 m which represents 30% of the construction
works, and the adjoining facilities have been partially constructed including the water intake tower, the
asphalt-concrete diaphragm, and the control and measuring equipment. Other construction works already
finalized at the site include: the water catchment derivations and the four water intake facilities from
which water is supplied to Tryavna are fully constructed; the rock quarry Suhodole located at about 6 km
from the dam and at the dam construction site have been opened; the DWTP has been constructed up to
40%; the water supply main up to 90% and the related roads have been completely constructed. The
construction effluent released during performance of works at the site are settled before the cofferdam
(item 5.2.) eliminating sedimentation of the Neykovska river.from these works. The humus depot and the
spillway with a chute and ejector were not completed because works stopped in 2000. The construction
materials extracted at the quarries meet the current Bulgarian standards and are adequate for dam wall
construction.
The river eco-system is currently negatively affected from the suspended dam construction. A substantial
part of the forest has been cut during 1980s and 1990s. The humus is restricted in quantity at the dam site
and has not been removed. Upon resumption of the construction works it will be removed (for mandatory
sanitization of the reservoir bed). The flow of the river is not currently impeded because it continues to
flow through the diversion tunnel constructed in the past. However, the river at the dam site and
downstream from the site naturally experiences strong fluctuations in flow volume, with high flows in
spring and little or no flow during summer months. As a result the ichthyofauna is limited at the dam site
and immediately downstream. Herpetofauna is represented only by one species of high conservation
status, which might be impacted by the reservoir 1. Mammal and bird species found in the area
surrounding the dam are distributed over the whole territory of the northern slopes of Central Stara
Planina Mountain. From the most recent available information on groundwater and surface water quality
collected from the rivers in the watershed of Neykovtsi dam (e.g., Bulgarka River, Grubcevo open
catchment, Dryanovska river) and performed by the ―Vodocanalengineering‖ in Gabrovo, during 19902008, the water quality failed to comply with the drinking water requirements. Therefore it will be
necessary to treat the water before it is supplied to consumers, thus, the need to update the DWTP design
and complete its construction. The Water Treatment Plant is envisaged to be constructed during project
implementation. The current soil pollution at the dam site is not known but it will be analyzed during the
1
Species include in national and international nature conservation documents are assigned high nature conservation
status. As a rule, species of high nature conservation status have been assigned conservation priority in Directive
92/43/ЕЕС
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update of the dam feasibility study and design. Based on land use and topography there is no reason to
expect significant pollution of soil at the site will be found.
From a social perspective, the suspended construction of Neykovtsi Dam has left the towns of Tryavna
and Plachkovtsi and settlements in these municipalities with inadequate water supply. This issue became
a major concern for the population during the summer of 2008, when the region was affected by the most
severe water supply rationing that ever occurred in the country.
POTENTIAL ENVIRONMENTAL IMPACTS
The main environmental impact will be the creation of a lake upstream of the dam where the water would
be stored. This will change the existing riverine ecosystem to a lacustrine ecosystem with impacts on the
flora and fauna communities. However, the areas which will be converted do not include critical habitats
or resources for endangered or protected species. A detailed analysis is presented in sections 5.7 and 5.8.
The retention volume of the reservoir (4,80×106 m3) is not expected to be significant enough to create
seismic risks or other severe environmental damage. A substantial part of the potential negative
environmental impacts resulting from the construction of Neykovtsi dam have already occurred due to the
works already undertaken, as described above. Most of the forest and other vegetation on and around the
site have already been cut (in some parts this vegetation has regrown and will have to be cut again before
construction works continue). Completion of the dam including restoration of the landscape and
vegetation will have a positive impact compared with the current situation. The existing dam wall (16 m
already constructed) will provide for the settlement of the construction effluent during the completion of
works for Neikovtsi Dam, reducing the risk of polluting the river water.
Overall, the construction related impacts for completion of the dam are likely to be localized and can be
prevented by applying international construction practice and planning. Such potential impacts may be
related to: (i) air pollution/dust, noise, vibration, and access restriction, (ii) improper disposal of
construction related waste; (iii) temporary pollution of soil and surface waters due to accidental spillage
of fuel and oil from construction activities; (v) safety hazards including worker safety; (vi) damage to
remaining trees and vegetation, and (vii) chance finds of physical cultural resources. These impacts will
be properly managed during the construction phase by the contractor and closely supervised by PIU and
designated supervisor engineer.
Potential environmental effects due to the existence and operation of the future dam and its reservoir may
be related to: (i) changes in downstream morphology of riverbed and banks due to altered sediment loads
of the river that would result in increased local erosion; (ii) changes in downstream hydrology (total
flows, seasonal flows, short-term fluctuations); (iii) changes in downstream water quality (e.g., nutrient
load, concentration of heavy metals, temperature); (iv) reduction of biodiversity and river ecosystem due
to blockage of movement of local species (e.g. fish) and because of elimination of floods; and (v) impacts
on existing infrastructure such as roads and bridges. These potential impacts can be reduced and managed
through mitigation and monitoring measures outlined in the Environment Management Plan (Section VII
of this study; summary presented in the following section).
Completion and proper operation of the Neykovtsi dam will have a positive impact as it will stabilize
downstream flows of the Neikovska River, with the ensured continuous release of the minimum
acceptable runoff (environmental flow). This environmental flow was calculated in accordance with
relevant Bulgarian legislation following a model based on determining the minimum flow required to
maintain downstream species abundance. This is expected to contribute to the formation of stable
ichthyocenosis in the dam area. The population of the municipalities (13, 051 inhabitants) will get
normal continuous water supply of potable water at good quality (the update design of DWTP and its
construction are forthcoming), and this will open opportunities for development of recreation and tourism
related to the landmarks of history and archaeology in the area.
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TRANSBORDER EFFECTS
The Neykovska River is a small tributary of the Yantra River which flows into Danube at the border of
Bulgaria. The mean flow at the Neykovski dam site is 73 l/sec, compared with a mean flow of 49,800
l/sec for the Yantra river at the border where it exits Bulgaria. During the construction period there will
be no interruption or reduction in flow of the river and measures will be taken to avoid pollution of the
water. During the impoundment period there will be a reduction in the river flow downstream of the dam
site as part of the flow will be captured to fill the reservoir. The amount of the reduction will depend on
the reservoir size, filling period and precipitation levels but even with rapid dam filling (less than one
year) the impact on the flow of the Yantra river at the border would be less than 0.2%.
SUMMARY OF THE ENVIRONMENTAL MANAGEMENT PLAN (EMP)
The EMP provides a thorough presentation of mitigation measures proposed to reduce the adverse
consequences resulting from the construction works and the operation of the future dam. The mitigation
measures will be further refined once the FS and detailed designs for this dam works are updated. The
measures during construction include: site management and institutional controls limiting access at the
site during construction works and restricting land and water use where appropriate; health and safety
protection for workers and population – air pollution monitoring, noise, use of protective working
equipment, communications during works; contingency planning and emergency response including onsite and community emergency response, incident reporting, first aid procedures and equipment; waste
management and soil removal and transport mitigation measures; protection of fauna and flora species
(detonation works); and compliance with dam safety regulations. Mitigation measures for the operational
phase include maintaining the required environmental flow, the sanitary protection zones and
implementation of the dam safety plans.
The EMP also summarizes a series of environmental monitoring actions aimed at measuring
contamination in air, surface and groundwater, drinking water and sediments in the river beds, during
construction and during operation. Monitoring parameters, including specific physical and biological
parameters, location and frequencies are also provided. The monitoring program will be refined based on
the updated FS and detailed design to clearly define monitoring protocols for the various parameters on
the basis of future dam operating rule including features built such as outlet valves, gates or relevant
features that would physically allow environmental flow releases. This will ensure that the stipulated
environmental flow of 0.010 m3/s calculated based on clear national procedural bases and following the
EU Water Framework Directive is being met.
Institutional arrangement and estimated costs for implementing the mitigation and monitoring are also
described, with costs to be refined with completion of the detailed design. Implementation will be
primarily accomplished through a project management unit within the MRDPW and supported by staff
and governmental and private agencies relevant to the project.
ALTERNATIVES CONSIDERED
This EIA identifies and evaluates several alternatives to the proposed project discussed during the earlier
design phase, including the ―no action‖ alternative; alternatives related to location of the dam and of the
drinking water treatment plants (e.g., pumping water from Dryanovo and use of mine water from the
closed Lev mine); type of dam wall and related facilities alternatives (considering the seismic magnitude;
hydrological and geological information; need of intake water town or front spillway with chute); other
alternative considering demolishing the partially constructed wall. The ―do-nothing‖ alternative was
rejected since Neykovtsi dam is considered the only feasible water supply source for the surrounding. The
proposed location and design were selected based on technical, environmental and social considerations.
The option chosen was made due to availability of proper geological conditions, sufficient area permitting
reservoir construction, and availability of an asphalted road. The proposed site for DWTP was accepted
due to its advantages concerning land expropriation and proximity to the road network.
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CONSULTATION WITH AFFECTED GROUPS
An extended public consultation process has been implemented for the proposed project at national and
local levels on several occasions during project preparation; initial public meetings were held on the EDD
Reports and social due diligence reports in the Tryavna municipality in October and December 2007.
Final public consultations were held in February 2009 when this report was discussed at the MRDPW
premises and in the town of Tryavna. Minutes of these meetings are attached in Appendix 14. The
discussions underlined the importance to finalize construction of Neykovtsi dam in order to overcome the
current negative environmental status resulting from the suspension of construction works and to establish
healthy and comfortable living conditions for the population in the respective municipalities.
COMPLIANCE WITH WORLD BANK SAFEGUARDS
The project is rated as environmental assessment category A in compliance with Bank policies which call
for a full environmental assessment to be carried out for the construction of a large dam. This EIA report
has been prepared and submitted in compliance with all applicable World Bank safeguard policies
relating to OP/BP 4.01. The Bulgarian dam safety requirements are in line with those of the Bank and for
the project design, construction, and operation the Bulgarian legislation and the Bank policy OP/BP 4.37
Safety of Dams will be followed. Investigations during the EIA preparation process did not raise concerns
regarding possible cultural properties at the proposed dam site, and therefore the Bank policy OP/BP 4.11
on Physical Cultural resources is not triggered. However, the EMP includes provisions to address impacts
to cultural heritage and archeology if chance finds occur during the construction works. The Bank OP/BP
4.36 Forestry is also not triggered because no existing forest ecosystem will be affected. Although a small
number of trees will need to be removed from the future reservoir basins once civil works will start, these
trees are scattered individuals which were left in place when the area was cleared of vegetation years ago
during the initial dam construction period.
The OP/BP 4.04 Natural Habitats will apply since a small part of the reservoir and sanitary-protection
zone of the Neykovtsi Dam is expected to be located on the territory of Balgarka Protected Area (code
BG 0000399) of the National environmental network (also a Natura 2000 site). However, as noted above,
the nature of the sanitary protection zone is such that it will not have an adverse effect on ecological
resources, flora and fauna in the area. In fact, the need to maintain the sanitary protection zone for the
dam is expected to assist in ensuring the protection of the area. As part of the updating of the feasibility
study and refinement of the EMP, further surveys will be carried out to confirm the situation on the
ground and determine whether any measures are required to avoid or minimize effects on any biodiversity
of the area.
The policy OP/BP 7.50 Projects on International Waterways is applicable because the dam is will create
an impoundment on the Neykovska river - a tributary of the Yantra River that leaves Bulgaria and flows
into Danube River which flows at the border between Bulgaria and Romania. In accordance with the
policy, the Borrower notified the Danube Commission about the project goal and investments.
ENVIRONMENT-RELATED LOAN CONDITIONALITIES AND COVENANTS
Environmental loan conditionalities and covenants will relate to the implementation of recommended
mitigation measures and monitoring activities. During project implementation, the EMP will be updated
to reflect specific monitoring actions and indicators and estimated costs as a result of the update of the
Feasibility Study and Detail design. The updated EMPs will be reviewed and approved by the Bank
before the procurement for civil works are initiated. Respective covenants on EMPs have been integrated
in the Financial Agreement.
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LEGISLATIVE AND POLITICAL SYSTEM
AND ENVIRONMENTAL MANAGEMENT ORGANIZATIONAL DIAGRAM
Design and construction of Neykovtsi Dam was implemented following a decision of the Council of
Ministers of the 1970-ies. In 2000 a decision was taken to suspend the dam financing due to economic
difficulties of the country.
This EIA report has been implemented in compliance with the provisions of the Bulgarian regulations and
the Bank safeguard policies relevant to Neykovtsi dam, as follows
1.
ОР/ВР 4.01 Environmental Assessment
2.
ОР/ВР 4.37 Dam Safety
3.
ОР/ВР 4.04 Natural habitats
4.
ОР/ВР 4.36 Forestry
5.
ОР/ВР 7.50 Projects on international waterways
6.
Environmental Protection Act (SG No.91/2002 .......... No 94/2008 )
7.
Water Act (SG No.67/1999 amended and supplemented No 70/2008 )
8.
Bio Diversity Act (SG No.91/2002 ...........No.94/2007)
9.
Waste Management Act (SG No 86/2003 .......... No 34/2006 )
10.
Fisheries and Aquacultures Act (SG No.4/2001 .......... No 108/2006 )
11.
Ordinance on the terms and conditions for performance of EIA (CoM Decree 59/2003 ....
SG No.3/2006)
A full list of the national and international laws, regulations and other legislative documents referring to
the EIAS is enclosed in the Appendix.
Control on the implementation of the measures for protection of the environment in the course of
construction works is exercised by the RIEW in the town of Veliko Tarnovo and by the Regional
Inspectorate on Health Safety and Control (RIHSC) in case of signals related to human health risks.
Furthermore, the environmental expert at Tryavna municipality performs regular supervision of the
implementation of measures and the status of the environment and submits reports to RIEW Veliko
Tarnovo. In case of failure to perform the measures, RIEW Veliko Tarnovo may impose sanctions,
defines deadlines for implementation of the recommendations and, as a last resort, terminates the activity
in violation of the recommendations.
The plan for environmental monitoring during the construction of the dam and its operation phase is
developed before the construction and operation and is approved by the Basin Directorate (BD), RIEW
and MOEW (Environmental Executive Agency – EEA) in line with national legislation and the
Monitoring Plan included in this report. Such plan is updated and approved annually by the 3 authorities
mentioned above. The environmental monitoring plan for Neykovtsi will be updated as soon as the detail
design and respective feasibility study will be reviewed in accordance with the current situation. At the
end of each year, annual statements are submitted, based on which either additional requirements may be
included to the monitoring or others may be withdrawn. The monitoring period is determined in the
EIAS, and specified in the Monitoring Plan for the construction and operation period, which can be
revised as many times as needed. Standing obligations are those of the Ministry of Health (MH) to control
water quality through its regional unit the Regional Inspectorate on Health Safety and Control (RIHSC),
Water and Sewerage Gabrovo and, if needed, or in case the dam is included in the National Monitoring
Network– of the MOEW, (in compliance with a MOEW decision to come into effect after dam
commissioning).
The dam operation unit will be responsible for the water supplied from the dam during its operation
phase. The control on the quantity of environmental flow and run-off is exercised by RIEW Veliko
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Tarnovo and by the Basin Directorate Dunavski Region – town of Pleven. Water quality will be
monitored by W&S – Gabrovo, RIEW and RIHSC – Veliko Tarnovo.
ІІІ. OVERVIEW OF NEYKOVTSI DAM PROJECT
The Neykovtsi dam is located in the valley of the Neykovska river above Neykovtsi residential estate of
the town of Plachkovtsi and at about 7,5 km south of the town of Tryavna. The dam has been designed by
Vodocanal engineering EOOD (former Vodokanalproekt) as a multiannual compensator for supplying
drinking water to the town of Tryavna, town of Plachkovtsi and the settlements in the region. Several
updates of the design were provided in1972, 1978, 1982-83, 1986 and 1990.
Currently the water supply is secured in the region by the group Tryavna-Plachkovtsi and several local
water sources including local water intakes in some villages. Most of these sources have unsteady flow,
especially in summer, which causes problems in the regular supply of drinking water to the local
population. In 2007, according to data of VIK Gabrovo, water had to be pumped from southern Bulgaria
to save conditions during the tourist season. Several water sources possibilities were studied including the
use of water from boreholes in order to secure supplies for villages, however their flow was also
considered unsteady.
Preliminary investigations made by Vodocanal engineering EOOD (former Vodokanalproekt) in
1972 justified the need to construct Neykovtsi dam based on hydrological and hydro-geological data and
water economy research work that determined the volumes and elevations of the dam wall with economic
rationale for proving the site efficiency. The technical design of the two receiving derivations with the
four water intakes was completed in 1978, and the dam wall technical design was prepared during 198283. Several additional developments took place and the detailed design was partially elaborated at the
startup of construction works in 1986. Based on revised hydrological studies and water balance
examinations of Neykovtsi water supply system performed in 1990 the required volumes for water supply
of the municipalities of Tryavna and Plachkovtsi were determined and clarified all proposed technical
solutions and the detailed designs. The DWTP design was prepared in early 1980-ies (since 1980 the
Bulgarian practice features three design stages: feasibility study, technical design and detailed design).
Due to several delays in construction, the DWTP design was updated several times, the last update being
made in 1994.
The construction of the Neykovtsi water supply system started in 1978 and after several interruptions was
suspended in 2001. The construction site was used by Hydrostroy AD and now is partially used as a
motor depot. The construction site is located below the dam and above the Neykovtsi housing estate,
located on the left bank of the Neykovska river. As of 1986, Hydrostroy is state-owned company.
The water facilities of the Neykovtsi water supply system includes the following: dam wall, diversion
gallery, cylindrical water intake tower, main water outlet, injection gallery, front spillway on the left
slope, two receiving derivations with four water intakes on the Somarinenska and Plachkovska rivers (not
belonging to the watershed of Neykovska River) and a Drinking Water Treatment Plant (DWTP) that is
located immediately above the town of Tryavna.
The Neykovtsi dam is state public property under the Ministry of Regional Development and Public
Works (MRDPW).
The future dam operator will be the ―Water Supply and Sewerage Company of Gabrovo (VIK Gabrovo).
Dam wall
The dam wall was designed as rock fill with an asphalt-concrete diaphragm (ACD).
The major parameters of the dam wall and the water reservoir are as follows:
Maximum height from the ground
42,00 m
Crown length
201,00 m
Total flooded volume:
4,80×106 m3
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Lake length
1300,00 m
Usable volume
4,30×106 m3
Dead volume
1,00×106 m3
Water intake area:
13,55 km2
Average height of the watershed above sea level
648 m
Average annual inflow
9,19×106 m
Flooded area
32,5 ha
Wall summit (crown) elevation
581,00
Elevation of the highest water level (HWL)
580,95
Elevation of the lowest operational water level (LOWL)
554,60
Maximum water quantity for water supply
240 l/s
Total volume for water supply
5,60×106 m3
Watering volume (environmental water)
0,316×106 m3
Water intake tower
The water intake tower is located close to the right bank of the Neykovska river before the diversion
barrage. The intake features a reinforced concrete construction with 4,5 m shaft diameter.
A front spillway has been designed with an arching outline, transitory section, chute and ejector for
diversion of high floods. The front spillway has been designed for high water with an occurrence of 0,1%
(once in 1000 years).
The main water outlet is located in the gallery for the diversion of river water during construction.
Drinking Water Treatment Plant (DWTP)
The DWTP is located 2 km from the town of Tryavna and 1,3 km from the road junction GabrovoTryavna. Water will be taken via steel pipes (530) from the dam to the treatment plant, and then to the
town of Tryavna. Water quality laboratory tests of the water supplying Neykovtsi dam showed results
beyond maximum admissible concentrations for nitrogen and nitrates, coli titres and microbial indicators.
The DWTP has been designed to treat QNo. = 240 l/s. Several updates of the DWTP detail design have
been made due to delayed construction works, to include modern equipment and automation (the latest
update was done in 1994). An environmental assessment has been undertaken for the DWTP in XXX and
will be revised as part of the updating of dam detailed design.
Current situation at Neykovtsi Dam
During the visual inspection of the dam and the facilities in 2007 and 2008 it was established that: The
dam wall is constructed up to 16 m height, which represents 30% of the required construction works;the
upstream batter to the dam is covered with rock plate and the downstream batter with rubble; the
diversion barrage and diversion gallery on the right bank of the river are constructed; the water intake
tower has been partially constructed (up to 1/3 of the required height); the injection gallery has been
constructed to the height of the embankment with a formed core cluster of ACD, the control and
instrumentation equipment has been installed partially (SCADA); the receiving water derivations of the
four water intakes that will supply water to Tryavna are constructed. The main water outlet and the
network facilities including those to the dam wall and the water intake tower as well as to the front
spillway on the Neykovska river left bank are fully constructed. The humus depot has not been opened.
The rock quarry Suhodole located at 5 km from the town of Plachkovtsi has been uncovered and a
temporary construction site has been established where the concrete unit and some of the construction
wagons are still usable.
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The DWTP has been constructed up to 40%, the water supply trunk up to 90%, and the roads are
completely constructed and the humus depot has not been opened.
The following construction activities need to be finalized for completion of the dam: on the wall – rock
embankment, asphalt-concrete diaphragm, installation of the control and instrumentation equipment
(SCADA), front spillway with chute and ejector; the gate valve chamber; DWTP construction works ;
concrete and installation works on the water intake tower, installation works on the main water outlet;
assessment of the current status of the bridge at the town of Plachkovtsi and undertaking of measures for
recovery of the damages caused on ІІІ and ІV-class national and municipal road network resulting from
construction works. Construction of the wall and the facilities, and the construction of the DWTP will be
performed in parallel. The update of the design will confirm the required waste quantities, construction
works time schedule, DWTP wastewater discharge, and the status and location of the humus depot.,
Construction waters that could possibly pollute the Neykovska river water has been secured by the
diversion barrage and the constructed wall up to the current height (16 m).
The Contractor will be responsible for the proper implementation of construction works and related
environmental management plan; an operational unit will be established by VIK Gabrovo to perform
measurements with the installed SCADA system.
Monitoring reports will be submitted annually by VIK Gabrovo during the construction stage to the Basin
directorate (BD) Dunavski region - Pleven and RIEW Veliko Tarnovo. Monitoring results will also be
submitted to the Bank as part of the annual progress reports during the project implementation.
Prior to the startup of construction works for completion it is necessary to perform the following: review
of the as-built drawings of the already performed construction and installation works, including hidden
works; estimation of the high waters flow based on hydrological data for the last 30 years and update of
the wall crown elevation, confirmation of the class of the dam wall and update of the spillway design;
carry-out micro seismic studies to determine the seismic hazards of the site and the dam wall; collect
samples from the filters‘ embankment and from the rock prisms to assess the geo-technical parameters of
the material; survey of the deposits allocated for embankment materials in the rock quarry Suhodole;
update of the wall cross-sectional profile according to the geotechnical examination results and the
hydrological and seismic studies; survey of the condition of installed SCADA equipment and update of
the SCADA design, if needed; evaluation of the condition of the concrete facilities; evaluation of the
condition of the receiving derivations; update of the dam wall and DWTP designs, collection of soil
samples from the bed of the reservoir. The maximum water consumption per day has been estimated at
240 l/s.
The existing construction site used during the initial works for Neykovtsi dam is located at about 0,5 km
from the dam wall and will be used for completion of the construction. Temporary facilities related to
construction works have been preserved at the site (concrete unit), shuttering and fitting yard, and parking
lots for mechanical equipment and vehicles. The time frame for the dam completion is estimated at
3 years.
The workforce required during works is estimated at about 150 construction workers and mechanical
operators. The dam operation will be performed by maximum 20 staff (including operation of the
DWTP).
The operational lifetime of the dam in accordance to the regulatory documents will be 100 yearsThe
required foreign investment has been estimated at € 20 000 000 in accordance with the previous
feasibility study.
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ІV.
OVERVIEW OF ENVIRONMENTAL COMPONENTS AND FACTORS
4.1.
AIR QUALITY
4.1.1
EIAS
Climate
The Neykovtsi dam pertains to the Predbalkanski climatic region covering the rolling pre-mountain areas
right before Stara Planina mountain, whose height to the north is 300-350 m, and to the south about
1000 m, with 581 m above sea level height of the dam level in case of normal flooding. T he region
features temperate continental climate, but at the same time climatic characteristics exhibit great spatial
fluctuations in values due to the big diversity of morphometric indicators.
WINTER Winter in this region is cold and the average January temperature is about 1,5º С below zero.
The average minimum temperature in January is about -5/-6ºС, and the absolute minimum temperature
may fall below -15/-16ºС. The average maximum temperatures in January are about 2-3ºС. Sometimes
foehn winds appear causing higher values in maximum temperatures which may exceed 14ºС. Snow
cover is relatively stable in the northern parts lasting on average between 30-60 days. The average
monthly wind speed is about 2 m/s. The prevailing winds in wintertime as well as throughout the year are
the west winds. The average monthly relative air humidity in wintertime is about 80%. Winter is the
season of the highest cloudiness, with a mean monthly value below 4 units. The number of bright days in
wintertime totals about 10% of the season.
SUMMER The average monthly temperatures in summer are in the range 18-22С in the lower and open
parts of this region. In the dam area these temperatures could be 0,5-1,0С lower. The mean maximum
temperatures in summer months are in the range of 25-28,5С, but in case of continuous anticyclone
conditions the maximum air temperatures exceed 34С. In case of cold intrusions temperatures may drop
below 9С.
July and August feature the lowest of relative humidity values, with average monthly relative humidity in
the range 60-66%. Summer is also the season with the highest number of bright days, with about 30% of
them in July and August. The mean monthly cloudiness in August is 3 units, which is the lowest value
throughout the year.
SPRING AND AUTUMN Spring is cool, with mean monthly temperature of about 10С for the central
spring month. Fall is warmer than spring by about 6С; during mid-March the mean daily temperature of
air exceeds 5С and in late December falls below this limit. During springtime the mean monthly wind
speed is in the range of 1-2 m/s. The typical springtime fluctuations in the atmosphere are manifested in
the reduced percentage of calm weather, and autumn is the season with the mildest winds.
Precipitation and evaporation are two major climatic elements, impacting water storage of dam reservoirs.
The region is characterized by the typical continental distribution of rainfall with a peak in the warm
semester and minimum in the cold one. The annual amount of rainfall in the region is in the range of 780890 mm. Seasonal precipitation in wintertime is about 160-170 mm, in springtime about 230-240 mm, in
summertime about 280-290 and about 170-180 in fall. About 60-70% of precipitation in winter is due to
snowfall. The maximum daily precipitation in the region depends on the location and may exceed
100 mm.
The overview of the climatic background is illustrated and supplemented by the enclosed diagrams, based
on data published in the Climate Reference Books of Bulgaria (YEAR)
4.1.2
Air Quality
Following the suspension of Neykovtsi construction works the air quality in the region reverted to the
condition it had prior to commencement of the project. The towns of Tryavna and Plachkovtsi are
developing into tourist centers. There are no industrial activities in these towns. There is no transport of
pollutants from other regions. The only source of air pollution is the automobile traffic, which increases
during weekends and in summer and winter season but without any notable impact on air quality.
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22
21.8
18
16.1
14
11.8 12.1
8.6
-2
-1.4 1
-6
2
6.8
3.1
2.7
4
5
-2.8
6
7
8
9
10
-1.2
11
-5.1
0
12
-2
-6.2
-10
-10.1
-14
-18
3.1
1.5
3
-2.9
7.2
6.2
0.6
1.1
7.6
6.1
5.2
2
15.3
15.8
10.7
11.5
6
17.6
14
10
С0
21.7
19.5
-16.1
месец
-14.1
Tср
мин.
абс.мин.
Fig.1 Average monthly, minimum and absolute minimum temperature- Dryanovo station
32
28
28.3
28
14.8
16
31.1
27.8
24.4
21.8
21.9
21.7
19.5
17.3
16.5
28.3
21.8
21.6
20
34.1
25.2
25.1
24
С0
32.7
31.1
18.2
16.1
12.1
10.4 11.5
12
8
5.9
4
17
17.6
11.6
6.8
5.2
5.6
3
1.5
1.1
0
1
2
3
4
5
6
месец
7
8
Tср
9
10
макс.
11
12
абс.макс.
Fig.2 Average monthly, maximum and absolute maximum temperature- Dryanovo station
14
13.7
11.8
12
брой ясни дни
10.3
10
8.2
8
6
5.3
4.8
4.1
4
3
3.2
1
2
3.6
3.6
3.4
11
12
2
3
4
5
6
7
8
9
10
месец
Fig.3 Mean monthly number of bright days by general cloudiness - Dryanovo station
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110
108.8 108.7
100
90
82.2
мм
80
75.5
70
68.9
60
55.2
50
56.4
57.9
10
11
52.6
47.4
47.8
2
3
56.1
40
30
1
4
5
6
7
8
9
12
месец
Fig.4 Mean monthly precipitation quantity — Tryavna station
7
6
бал
5
4
3
2
обл
1
2
3
4
5
6
7
8
9
10
11
12
6.8
6.5
6.3
5.6
5.4
4.8
3.7
3
3.5
4.9
6.5
6.9
месец
Fig.5 Mean monthly cloudiness — Dryanovo station
85
84
83
81
80
79
75
%
75
72
71
70
70
68
67
66
65
63
60
1
2
3
4
5
6
7
месец
8
9
10
11
12
Fig.6 Mean monthly relative air humidity — Dryanovo station
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N
N
25
30
25
NW
NE
20
NW
20
15
10
10
5
5
W
NE
15
0
E
SW
W
SE
0
E
SW
SE
S
S
January /calm/-31.0% April /calm/-21.4%
N
N
25
30
25
NW
NE
20
NW
20
15
10
10
5
5
W
NE
15
0
E
SW
W
0
E
SW
SE
SE
S
S
July /calm/-25.5% October /calm/ – 30.5 %
N
30
25
NW
NE
20
15
10
5
W
0
E
SW
SE
S
Annual /calm/-25.7%
Fig.7 Wind Rose- Dryanovo station
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4.2.
EIAS
WATER
SURFACE WATER
The Neykovtsi dam is located on the river Neykovska which rises from the Tryavna Mountain.
Hydrological data
Hydrological, hydro-geological and water studies were carried out before the Neykovtsi dam construction
by ―Vodocanalengineering‖ EOOD on several occasions, the most recent ones dating from 1990). The
hydrological information collected at four hydrometric stations (HMS) on tributaries of the Yantra river
was used. After the data were processed, they were reduced to the four water catchments and the wall
range. High waters were defined with occurrence of 0.1%, 1% and 5%.
Hydrological information has not been reported for almost 20 years until 2008. During these years, there
have been dynamic processes of dry periods, followed by wet ones. During the review of the feasibility
study and detail design, it is important to update the hydrological information for high waters and to
determine the water quality with occurrence of Q0.01%. Also, it will be necessary to classify the wall in a
higher class (from 2nd to 1st) taking into account the new normative framework.
Silt runoff
The Neykovtsi river network includes a HMS where floating deposits are measured for 10 to 19 years. On
the basis of these measurements, the silt runoff to the site has been determined. The reservoir on
Neykovska river has been highly affected by afforestation.
There are no studies of the quality of the soils around the dam.
Water quality
Laboratory analyses have been performed by ―Vodocanalengineering‖ for the water quality in the rivers
in the Neykovtsi dam watershed (e.g., Bulgarka River, Grubcevo open catchment, Dryanovska river) ,
inluding physical-chemical indicators, microbiological analysis and radioactivity test of water samples
collected during 1990 to 1994. The results showed that the water quality fails to comply with the drinking
water requirements proving the necessity to treat the water before it is supplied to consumers, update the
DWTP design and complete its construction. .More water samples will be collected during the update of
the design.
The construction of the dam wall up to 16m separated the upper section from the lower section of the
river. The river flows now from the upper to the lower section via a diversion tunnel. The river runoff
decreases drastically during the summer and autumn low waters.
The elevation to which the dam has been constructed creates potential hazards for the population of the
Neykovtsi residential area and the town of Plachkovtsi in the event of high waters. There are no street
collectors or wastewater systems in the watershed since the villages are using septic pits.
Recent water quality test results have been attached in Appendices.
GROUNDWATER
The groundwaterin the dam area is determined by host rocks and is of fissure and karst type.
Fissure waters are accumulated in the sand-argelite deposits in the mid-Triassic. These waters are fresh
and drain in the rivers passing through the region. The underground runoff module is Мur < 1 dm3/s.km2.
The springs have a flow rate of up to 1 l/s.
Karst waters are concentrated in the Gabrovo-Trevnya basin and cover a large area, starting west of
Gabrovo and reaching the east of Tryavna and south of Plachkovtsi.
Maastichtian limestones are severely fractured and karstic in their openings. They are part of the
construction of the Gabrovo syncline and in its central part they are uncovered as narrow strips in its
limbs.
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Karst water is recharged mainly by precipitation in the limestone openings with a small amount of water.
In the peripheral parts of the basin, groundwater has karstic chracteristics whereas in the reservoir area it
is a combination fissure-karst type. The aquifer is formed by Yantra, Dryanovksa, and Belitsa rivers.
Another known spring in the region is located near the village of Voyneja and has a flow of about10 l/s.
The underground runoff module of karst-fissure waters is Мur < 5 dm3/s.km2.
Fresh thermal waters with deep circulation form dynamic water pressure systems. In origin, they are
infiltration waters, in some cases buried earlier (mainly in the hollows). Their chemical composition is
formed by their host rocks.
The specified indicators from the available data presented in Appendix characterize the quality of ground
water.
4.3
GEOLOGICAL ENVIRONMENT
In geological terms, the Neykovtsi dam is part of the Paleogenic system of the Pre-Balkan. Paleogenic
sediments are widespread and fill the large syncline structures.
The region where Neykovtsi dam is situated falls within the Lukovit and Staropatishka suites (The thicklayered flysch formation).
Lukovit suite
The Lukovit suite includes alternating sandstone, alevrolites and clay mergels of flysch-like nature.
The sediments comprising the suite correspond to the flyschoid sediments from the formation of
alternating mergels and thin-layer sandstone.
The formation is situated visibly above the sediments of the Belene suite. In the lower part of the crosssection is a flysch-alternation of dark-grey to black argelites and thin-layer sandstone. Gradually upwards
is a thick-layer alternation also of sandstone and argelites.
Sandstone layers are usually thick (up to 1.0 and more metres). In composition, they are polymict – made
of quartz, feldspar, daze, and their joint is clay-limestone.
The upper border of the Lukovit suite in Gabrovo is marked by the quick but distinct lithological
transition to psammitic-psephite rocks of the Staropatishka suite. The openings of the Lukovit suite
continue far to the east of the Trevna river.
Staropatishka suite
The suite is built of badly sorted polygenous sandstones, gravelites and conglomerates, and slightly
clayey schists, alevrolites and argelites. Sandy and loamy rocks are rare. The different lithological
varieties are represented mainly by irregular and vertically alternating spatially uneven layers and lenses.
In some places, the sandstones turn into conglomerates. The argelites are dark grey to black. The
thickness of the reviewed litho-stratigraphic unit changes too quickly from tens to 450-500 m and
probably up to 1000 m. The upper border of the Staropatishka suite has an emphasized erosion character
and the suite section is in principle deeply eroded.
In the furthest southeastern part of the Paleogenic openings, the Lukovit-Staropatishka suite overlaps with
the low levels of the Lukovit suite, which belong to the early Eocene subseries.
Quaternary
Quaternary formations are limited. In the dam area there are Pleistocenic alluvial formations filling the
non-flood terraces (in rock composition, they are made up of uneven and different in form contacting in
different spatial relations bodies from rubble, sands and clay with slantwise bedding). Their thickness
reaches the first few metres.
In the dam area the sand-argelite formation is severely fractured. At the wall site there is a fault zone
about 20 m wide.
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Tectonics
A small part of the openings of the Troyan unit are in the dam area.
The most distinct regionally traceable structure from the early Illyric structure plan in the rock volume of
the Troyan unit is the Gabrovo syncline, which can be seen in the west-east direction and formed in the
sediments of the Boynovska, Lukovit and Staropatishka suites.
Its west centricline is clearly visible in the Lyulyatsi area, west of Gabrovo. Its northern limb passes
through Gabrovo and is followed by the Trevnya river. Its southern limb is followed well through Yantra
River to the territory of Enchovtsi village. The syncline is relatively shallow, linear brachio-form, inclined
to the east. It is superimposed with obvious angle disagreement on the traces of the Austrian structure
plan.
Neykovtsi dam falls in the 7th degree of seismic intensity and has a seismic coefficient of Кs = 0.10.
The dam wall is built of limestone material brought from the quarry situated next to the town of
Plachkovtsi.
The limestone is grey-white to white or slightly cream-coloured with massive texture. They are mostly
organogenic, karstic and fractured.
The specified features of the geological environment allow for input in the wall of the construction
materials extracted from the quarries and foundation of the dam wall in compliance with the safety
requirements.
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GEOLOGICAL MAP
М 1:100 000
LITHOLOGY
Staropatishka suite
Conglomerates and sandstone
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Lukovit suite
Rhythmic alternation of sandstone, mergels,
alevrolites, rarely argilites
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4.4.
EIAS
SOIL
In the region of Neykovtsi dam, soils are Luvisols, grey forest type. Those located on the slopes outside
the dam reservoir turn into brown forest type.
Grey forest soils are typical for the lower vegetation belt of North Bulgaria and the low mountain sub-belt
of the Middle mountain belt. They are formed on various soil-formation rocks, thus their mechanical
composition varies from loamy sand to sandy clay, and they are often stony.
The soils under the dam wall were affected by the dam construction up to 2001 as well as during the
creation of the construction road.
The soils in the dam bed are moderately deep and slightly stony in the shaded openings and shallow,
moderately stony on the sunny slopes. There are no river terraces in the gullie or sand their bottom is
stony.
While no soil samples have been taken at this time, the soils in the region are assumed not to be
contaminated with harmful substances and heavy metals because of the absence of sources of such
pollutants. However, soil samples will be taken from the reservoir ground during the process of design
update to verify their quality. Soil erosions were not observed in the dam reservoir and the whole
watershed basin.
4.5.
WASTE
The on-site inspection did not establish abandoned construction waste or unregulated depots.
4.6.
HARMFUL PHYSICAL FACTORS: NOISE
Currently, there are no excessive noise sources on the territory of the future Neykovtsi dam due to the fact
that construction has been suspended since 2001. The noise background is the natural background of the
environment.
4.7.
FLORA
In compliance with the forestry division of the country, the region of Neykovtsi dam falls into the
Moesian forestry district, North Bulgaria sub-district, medium alpine belt of beech and coniferous forests,
sub-belt of low-mountain forests of durmast oak, beech and fir.
The indigenous forest vegetation in the region includes mesophytic phytocenoses of the common beech
(Fagus silvatica). Their composition includes individual specimen of European hornbeam (Carpitus
betulus), Durmast oak (Quercus dalechampii), silver lindene (Tilia argentea), and willows near water
flows (Salix alba and Salix caprea).
As a result of the regeneration of low-productivity hornbeam-beech stands and afforestation in barren
areas, the region enjoys considerable area of forest cultures mainly of Scots pine (Pinus silvestris).
Sprouting of indigenous vegetation often participate in their composition – beech, hornbeam, Durmast
oak.
Before the dam construction works started, the vegetation in the reservoir was cut partially (about 6,07,0 ha). Since the broad-leaf vegetation at a proper age regenerates through sprouting at present this area
is a 25-year beech-hornbeam coppice of very good density, with an average height of 7-8 m and average
diameter of 5-6 cm, and an estimated average timber stock about 110 m3/ha.
In recent years felling of indigenous plantations continued covering the remaining area of the future water
reservoir. The mean age of the new coppice stands after the recent second cutting is in the range of 10 15 years, average height 2-4 m, average diameter 2-3 cm, and average timber stock (exceptionally fine
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EIAS
timber) about 30-40 m3/ha (Appendix: Forest map). The indigenous forest vegetation in the lakebed after
the fellings comprises beech-hornbeam coppice woods. Only the sanitary protected zone of the
prospective dam will fall within a Protected Area (PA) under Natura 2000” (according to MoEW).
Irrespective that the dam is near a PA, the areas falling within the water reservoir have low conservation
value because of their coppice nature and human impacts due to unregulated logging and grazing. The
available forest is used as firewood. There are no endangered or rare species in the dam area.
The information included in this EIA are based on a comprehensive inspection of the territory, review of
the available studies and sources and the consultations received (note the Appendix including Forestry
map showing the land excluded from the forestry fund of SF ―Plachkovtsi‖ and the types of forest
vegetation). At the public meeting on 13.02.2009 the issue of Compliance Assessment (a document to be
issued by special order of the competent authority) was put forward, however, when the MoEW was
consulted it was concluded that such assessment was not required.
Protected Nature Areas
The PA Balgarka covers 17970,27 ha and includes territories of the municipalities Gabrovo, Sevlievo and
Tryavna. However, the PA designation and development of respective Management Plan for this Natura
2000 site is still under investigation by MoEW.
Because the Management Plans for each of the designated zones of the PA remain to be developed,
analysis of compatibility of the dam with management objectives of the PA are based on general
indicators. Depending on the decision of RIEW – Veliko Tarnovo an assessment of the dam impact on
the PA can be made.
The Nature Park is located on the northern slopes of Central Stara Planina above the towns of Gabrovo
and Tryavna. This is the youngest Nature Park in Bulgaria as it was designated in 2002 by Order No RD775 of 09.08.2002 of the Ministry of Environment and Water in view of conservation, regeneration and
maintenance of beech ecosystems and landscapes characteristic of Stara Planina, the flora, fauna and the
cultural and historical landmarks in the region. The park territory covers the springs and the watershed of
the Yantra river and of its main tributaries in their upstream part, with an area of 21772 ha including
territories of the municipalities of Gabrovo and Tryavna. The area of the Nature Park covers Shipchenska
and Trevnenska mountain, bordering to the west the Uzana and Osenikova polyana localities, to the east
the protected locality Studen kladenets, the adjoining northern slopes and a part of the corresponding
Predbalkan.
While the PA designation and development of a respective Management Plan for this Natura 2000 site is
still under investigation by MoEW in collaboration with the Regional Inspectorate of Environment
(CoMD No. 349/27.01.2009), MoEW confirmed that the water reservoir of the dam does not fall within
the scope of the area under consideration. Therefore, completion of construction works and operation of
the future dam will not impact negatively any critical habitats or sensitive ecosystems in the Neykovtsi
dam area.
Another protected area entitled PA Dryanovska reka (code BG 0000282) of the Environmental network
Natura 2000 is located nearby the Neykovtsi dam. However, it was confirmed by MoEW that the dam is
located outside the borders of this PA
4.8.
4.8.1
FAUNA
Ichthyofauna
The investigation for the EIA purposes was performed in 2007. The section of the Neykovska river was
visited in the area of the future dam, which included visual inspections and fishing by means of net
devices. The analysis made also use of data collected the fall of 2005 for evaluation of biological
diversity, as well as survey data information on the presence of certain fish species in the region. [MS 11,
12]
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Current condition of the ichthyofauna
According to the results of the study, the following fish species are represented in the mid-stream of the
Plachkoska (Dryanovska) river:
River trout Salmo trutta fario
Black barbel Barbus petenyi
Chub - Squalius cephalus (= Leuciscus cephalus)
Rifle minnow - Alburnoides bipunctatus
Gudgeon - Gobio gobio
Romanogobio kessleri (= Gobio kessleri)
Bitterling Rhodeus amarus
Spined loach Cobitis elongatoides (= Cobitis taenia elongatoides)
Colden spiny loach Sabanejewia balcanica (= Sabanejewia aurata balcanica)
River trout is not a typical species for this river section and its population is maintained mainly through
artificial fish stocking. A typical species here is the black barbel, which serves as an indicator of the
environmental status of the river. A relatively steady fish community is registered only in the river section
that crosses the town of Plachkovtsi and further down the stream. According to the collected data, during
spring high water the river chub, black barbel and Gobio bulgaricus reach the dam wall however they do
not pass through the bottom water outlet in the section above. Salmo trutta fario appears in this river
section during high water, most likely via Trevnenska river, which is subject to fish stocking. The
composition of the ichthyofauna down the flow in the potentially affected area of the Plachkovska
(Dryanovska) river features six species of conservation significance:
Barbus petenyi (Biological Diversity Act (BDA), Appendices 2 and 4; Directive 92/43/EEC, Appendix
II (=Barbus meridionalis);BERN*, Annex III)
Rhodeus amarus (Biological Diversity Act (BDA), Appendix 2; Directive 92/43/EEC, Appendix II;
BERN*, Annex III)
Romanogobio kessleri (Directive 92/43/EEC, Appendix II; BERN, Annex III)
Sabanejewia balcanica (Biological Diversity Act (BDA), Appendix 2; Directive 92/43/EEC, Appendix II;
Cobitis elongatoides (Biological Diversity Act (BDA), Appendix 2; Directive 92/43/EEC, Appendix II (=
Cobitis taenia))
Alburnoides bipunctatus (BERN, Annex III)
Recently, the above-indicated species of conservation significance occur in the middle course of
Dryanovska river at the town of Plachkovtsi and downstream. Some of them (Barbus petenyi,
Alburnoides bipunctatus) can move upstream only as far as the dam wall and only during the spring highwater period.
4.8.2
Invertebrate
Five invertebrate species are the subject and purpose of protection of PA Bulgarka (BG0000399). The
information on these species can be found in the Standard Form of PA Bulgarka (BG 0000399).
Of these 5 species, four are unlikely to be found in the projected affected area, the 5 th one is likely to be
found there but is also spread around in the country. This is Lycaena dispar from Lycaenidae family,
which is a day-time species to be found in places where Rumex hydrolapatrum grows. It has been
established almost everywhere in the country.
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The other four species present in PA Bulgarka but not in the project affected area are:
Lucanus cervus of Lucanidae as a larva develops in oak, lime tree, beech, willow, poplar, hazel, ash,
chestnut, wild cherry. Only the beech and single hazels are to be found in the future water reservoir.
Rosalia alpine from Cerambyeidae family is very rare in Bulgaria. Its larvas develop in beech, hornbeam,
whitethorn, elm, alder, walnut, European larch, oak, willow, lime tree, chestnunt, Fraxinus and Acer trees.
Only thin wall beech, shrubby hornbeam and low-stemmed whitethorn have been established in the bowl
of the future water reservoir and the vicinity. Rosalia is not likely to be found here since it inhabits big
forest areas with old trees.
Cerambyx cerdo from Cerambyeidae family is frequent in forest places in Bulgaria, especially in low
stemmed forests with prevailing oak. Its presence in the neighbourhood of the future water reservoir is
almost certain, but precisely in this location and the near areas it does not occur because the forest
vegetation suitable for its larvae has been destroyed (including after tree regrowth indicated in 4.7).
Polyommatus eroides from Lycaenidae family is a day-time species to be found up to 2300-2400 m. The
caterpillar eats the leaves of many plant species, mainly grass. But it is quite unlikely to find it in the
affected area.
The invertebrate species mentioned above have no living habitats in the area concerned of the water
reservoir.
4.8.3.
Herpetofauna (Amphibians and reptiles)
These data have been obtained as a result of the inspection performed on site and study of various sources
on the herpetofauna within the scope of the territory of Neykovtsi Dam [MS 13, 14, 15, 16, 17, 18].
Species composition, conservation status and location of established and likely species
Table 1 includes the established species in the area (designated in the last column with VB 31807, date of
the inspection and of the species likely to be found in locations close to the site (designated with VK).
Table 1 List of species, their conservation status and habitat location in the dam wall and reservoir areas
Species
Salamandra salamandra
Warty newt
Triturus karelinii
Yellow-bellied toad
Bombina variegata
Great toad
Bufo bufo
Big water frog
Rana ridibunda
Rana dalmatina
Rana temporaria
Green lizard
Lacerta viridis
Wall lizard
Podareis muralis
Natrix tessellata
Smooth snake
Coronella austriaca
NEYKOVTSI_en_F.doc
Nature conservation status
Bern
Dir.
BDA/
IUCN
Convent
Annex No
ion
92/43
ІІІ
ІІ, ІІІ
ІІІ
Habitat
Data source:
Tryavna, Plachkovtsi,
Koychevtsi
VK
ІІ
ІV
Gabrovo, Tryavna
VK
ІІ
ІІ
ІІ, ІІІ
Tryavna; the dam
VK
VB, 31807
ІІІ
ІІІ
Tryavna
VK
ІV
ІІІ
V
in the dam
VB, 31807
ІІ
ІІ, ІV
ІІ
ІІІ
ІV
V
the dam
around Tryavna
VB, 31807
VK
ІІ
ІV
the dam
VB, 31807
ІІ
ІV
the dam
VB, 31807
ІІ
ІV
Tryavna
VK
ІІ
ІV
Tryavna
VK
ІІІ
LR
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NOTE: BDA – Biodiversity Law (SG, No.77/2002); IUCN – Red List of Threatened Species; LR – Low Risk; Bern
Convention on the Conservation of European Wildlife and Natural Habitats (Bern Convention) Appendices II and
III; Dir 92/43 Directive 92/43 of the EU on the Protection of Natural Habitats of Wild Flora and Fauna, Appendices
ІІ, ІV and V
Data analysis
From the species listed in Table 1, only the warty newt has a high conservation significance. It is not
believed to be present in the dam area. There are no species to be found in the Bulgarian Red Book
(vol.ІІ, Animals – 1985).
Number and density of the populations of the species established in the area under consideration
The low density of the populations of all represented species was established during a visit paid to the
area in 2007. It was found that only the big water frog is represented by about twenty specimens in water
bodies around the main water outlet in the base of the unfinished wall. The only forest frog was found in
the wet but dry bed of the river at some 500 m above the wall; Some yellow-bellied toads were
established in drying pool at about 150 m above the wall; wall lizards (3 specimens) were observed under
stones below the road on the right bank of the river; two green lizards were found on the road on the right
bank, at some 400 m and some 300 m above the wall.
The established density of the populations of all 5 species is very low. The reasons for that are the drying
up of the river, lack of other water bodies suitable for reproduction of amphibians, excavation and filling
works on the wall and the nature of the vegetation –environment that is unfavorable for most amphibians
and reptiles.
4.8.4
Mammal Fauna
The information below has been collected based on own observations, papers of different specialists and
through personal sources. [MS 19, 20, 21, 22, 26, 27].
Analysis of the current status
According to the zoogeographic division, the territory falls within the zone of the European fauna –
Staroplaninski region.
The endangered and rare mammals included in Appendix I and III of the Bern Convention have been well
preserved in the region in general and mainly in the area of NP Balgarka. These are the European wolf
(Canis lupus) and the brown bear (Ursus arctos), as well as those listed in the Red List for 2000 of IUCN
– the otter (Lutra lutra) and some bat species. Abundant are the hare (Lepus capensis), the fox (Vulpes
vulpes), the badger (Meles meles), the wild boar (Sus scrofa), the European polecat (Putorius putorius),
the squirrel (Sciurus vulgaris), the roe-deer (Capreolus capreolus). Other present species include the
jackal (Canis aureus), the red deer (Cervus elaphus), the beech marten (Martes foina) etc.
The petty mammals are common in that region: rodents (Rodentia) – various mice species (Apodemus
spp. and Mus spp.), voles (Microtus spp.) and insectivorous (Insectivora) – the hedgehog (Erinaceus
concolor), the common mole (Talpa europaea) and shrews (Sorex spp., Crocidura spp.).
The mammal species to be found in the basin of the Yantra river and its roundabouts, as well as on the
Territory of Nature Park «Balgarka» and their nature conservation status are shown in Table 2.
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Table 2 List of mamal species found at the Yantra River and Nature Park Balgarka
Species
Hedgehog
Erinaceus eurоpaeus
East European
hedgehog Erinaceus
concolor (Martin))
Common mole
Talpa europaea
Common shrew
Sorex araneus
Bicolored whitetoothed shrew
Crocidura leucodon
Lesser white-toothed
shrew
Crocidura suaveolens
Souslik Spermophilus
citellus
Red squirrel (Sciurus
vulgaris)
Forest mouse
Sylvaemus sylvaticus
House mouse
Mus domesticus
Water vole Arvicola
terrestris
Norway rat
Rattus norvegicus
House rat
Rattus rattus
European hare
Lepus capensis
Common vole
Microtus arvalis
Fox
Vulpes vulpes
Badger
Meles meles
Beech marten
Martes foina
Weasel
Mustela nivalis
Wild cat
Felis sylvestris
Wild boar
Sus scrofa
Wolf
Canis lupus
Bear
Ursus arctos
Jackal
Canis aureus
Roe deer
Capreolus capreolus
NEYKOVTSI_en_F.doc
BDA/
Annex
No.
The Red
Book of
Bulgaria
The Bern
Convention
Annex No.
The Bonn
Conventio
n
Annex No.
CITES
Annex.
No.
Directive
92/43/ЕЕС
Annex No.
.
IUC
N
WW
prote
cted
speci
es
LH
+
+
No3 +
No2
No3 +
No2 +
No2,4 +
+
+
No2
+
+
No2
+Rez. 6
No3
No3 +
+
+
No3 +
+
No3
+
No3 +
No3 +
No3 +
No2 +
No2 +
No4
+
+
+
No 2;4+
+
No 2;3+
+
No 2 +
Rez.6
No 2 +
Rez.6
No 2 +
No 3 +
No 2+ +
No 4 +
No 2 +
No 2;4 +
No 2 +
No 4+
+
+
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BDA/
Annex
No.
Species
The Red
Book of
Bulgaria
The Bern
Convention
Annex No.
Red deer
Cervus elaphus
The Bonn
Conventio
n
Annex No.
CITES
Annex.
No.
Directive
92/43/ЕЕС
Annex No.
IUC
N
WW
prote
cted
speci
es
No 3 +
LH
+
The species listed in Table 2 inhabit an area that is much wider than area to be impacted as a result of the
construction works for completion of Neykovtsi dam. Any potential habitat for these species in the
reservoir area itself has already been significantly degraded as a result of previous vegetation clearing.
4.8.5
Ornitofauna
The ornitofauna (Class Aves) is the best studied type of fauna and it is also the group whose nature
conservation status in Bulgaria is best regulated. In the area of the dam site the ornitofauna is comprised
of species which are characteristic of broad-leaved forests and forests of the low and middle parts of the
high mountains in Bulgaria. From zoogeographic perspective, the ornitofauna is of Palaearctic type [MS
23].
Status of the ornitofauna in the project area
The following bird species (Aves) have been registered in the scope of the site and the adjacent territories:
List 1 Existing bird species at the project site
.
1.
2.
3.
4.
5.
6.
7.
8.
9.
10.
11.
12.
13.
14.
15.
16.
17.
18.
19.
20.
21.
22.
23.
24.
25.
26.
Goshawk (Accipiter gentilis (L.))
Sparrow hawk (Accipiter nisus (L.))
Common buzzard (Buteo buteo (L.)) – migrating and hovering individuals
Golden eagle (Aquila chrysaetos (L.)) – migrating and hovering individuals
Peregrine falcon (Falco peregrinus (Tunstall)) – migrating specimen
Hobby (Falco subbuteo L.) – migrating and hovering individuals
Hazel hen (Tetrastes bonasia (L.))
Wood pigeon (Columba palumbus L.)
Tawny owl (Strix aluco L.)
Swift (Apus apus (L.))
Green woodpecker (Picus viridis L.)
Greater spotted woodpecker (Dendrocopos major (L.) in forests round and under the site
Swallow (Hirundo rustica L.)
Red-rumped swallow (Hirundo dahurica L.)
House martin (Delichon urbica (L.))
White wagtail (Motacilla alba alba L.)
Grey wagtail (Motacilla cinerea Tunstall)
Wren (Troglodytes troglodytes (L.))
Coal tit (Parus ater L.) - rare
Blue tit (Parus caeruleus L.)
Great tit (Parus major L.)
Nuthatch (Sitta europaea L.)
Black redstart (Phornicurus ochruros (Gmelin)) – incl. In the village
Robin (Erithacus rubecula (L.))
Blackbird (Turdus merula L.)
Song thrush (Turdus philomelos C. L. Brehm)
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27.
28.
29.
30.
31.
32.
33.
34.
35.
36.
37.
38.
39.
40.
41.
EIAS
Mistle thrush (Turdus viscivorus L.)
Blackcap (Sylvia atricapilla (L.))
Lesser whitethroat (Sylvia curruca L.)
Chifchaff (Phylloscopus collybita (Vieillot))
Wood warbler (Phylloscopus sibilatrux (Bechstein))
Spotted flycatcher (Muscicapa striata (Pallas)) – more abundant during seasonal migrations
Raven (Corvus corax L.) – single migrating specimen
Hooded crow (Corvus corax L.) – single migrating specimen
Jay (Garrulus glandarius (L.))
Red-backed shrike (Lanius collurio L.)
Green-finch (Carduelis chloris (L.)) – in the low parts of the region
Goldfinch (Carduelis carduelis (L.)) – in the low parts of the region
Siskin (Carduelis carduelis (L.)) – in fall and winter
Chaffinch (Fringilla coelebs L.)
Bullfinch (Pyrrhula pyrrhula (L.))
List 1 shows 41 bird species have been specified as characteristic of the region where Neykovtsi water
reservoir is located. This species composition around the dam territory can be evaluated as poor, or
relatively poordue to the fact that the area is relatively monotonous as a habitat – slopes are mainly
occupied by broad-leaf forests and coniferous forest cultures characterized by good canopy and dense
shrub communities.
The most numerous out of the forest nesting species in the region are the chaffinch and the robin, the
dippers, the chifchaff, the blackcap and the great tit. The most numerous of the swallows is the redrumped swallow.
The species in List 1 that are specified in the Biological Diversity Act, Annex 2 (of plant and animal
species threatened by extinction, whose conservation is a priority) (SG No 77, Section II – Protected
areas, Art. 6, item 4 (2) and (3)) are highlighted in List 2 below:
List 2 Protected Bird Species from List 1 beyond the dam site listed in BDA (Annex 2).
1. Golden eagle (Aquila chrysaetos (L.)) – migrating and hovering individuals
2. Peregrine falcon (Falco peregrinus (Tunstall)) – migrating specimen
3. Hazel hen (Tetrastes bonasia (L.))
4. Red-backed shrike (Lanius collurio L.)
The specified data refers to the large region beyond the dam. Eight of the species specified in Appendix 2
are present within the area of the dam. None of them is related to river environment.
Of the first two 2 species – the golden eagle and the peregrine falcon – only migrating and hovering
specimens have been observed because the site and the adjacent territories are not among their
reproduction habitats.
The hazel hen exists in the forests in the region, but not in the areas of the future dam reservoir that have
already been impacted by construction activities. The Red-backed shrike - dwells and nests in the low
forest vegetation in open expanses or in the edges or thinned forest sections, including urban areas. Three
pairs have been registered in the site area – along the banks in the region below the wall and high up the
slopes over the right riverbank. Some specimens dwell in the rarefied areas by the road after the dam
wall, and also near Neykovtsi housing estate. The flooding will not affect the habitats of the above
mentioned three pairs, since the areas by the road along the right bank dwelt by 2 of the pairs will remain
above the dam water, while the territory of the pair below the wall remains beyond the dam bowl, so that
all 3 pairs will continue to dwell in their nesting areas. Mammal fauna and the ornitofauna are mobile and
have been subject to strong anthropogenic pressure after 1978 (two loggings of the forest vegetation in
the future lake).
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4.9.
EIAS
LANDSCAPE
To a great extent changes have already occurred in the landscape and environment in the area under
consideration. The wall of Neykovtsi dam has been constructed up to 16 m. The vegetation that was cut in
the past has regenerated as a coppice forest, the rock quarry has been developed and the construction sites
at the dam wall and the DWTP have been formed.
Suspension of construction works has a negative effect on the landscape because of the unfinished
activities for remediation of areas disrupted by construction and the incomplete implementation of
facilities. There are slidings on the waterside of the wall.
4.10. SOCIAL AND CULTURAL ENVIRONMENT. HEALTH FACTOR
The Neykovtsi dam wall is located above the Neykovtsi residential quarter of the town of Plachkovtsi
(300 m away) inTryavna municipality. Tryavna municipality, including the town of Plachkovtsi totals
13 051 population, of which 94% live in the two towns and the rest in the villages and the house clusters.
The demography of the population in comparison with the mean values for the country is presented in
Table 3.
Table 3 Population around the Neykovtsi dam site
Urban location
1.
2.
3.
4.
For the country
Towns
Villages
Tryavna Municipality;
Population
(number)
7 679 290
5 425 332
2 225 985
13 051
Births
(per 1000)
9,6
10,1
8,3
6,2
Deaths
(per 1000)
14,7
12,2
20,7
17,0
Growth
(per 1000)
-5,1
-2,1
-12,4
-10,8
Note: 2006 data.
Data in Table 3 shows that the population growth in the Tryavna municipality is two times lower than the
average registered in the country; it is believed that this is due to the strong migrations and the age
composition of the population.
The region enjoys a favorable environmental status – the only air pollutants are the emissions from
vehicles and burning of firewood for household use.
The town of Tryavna is famous for its architecture from the period of the National Revival and for one of
the oldest woodcarving schools in Europe. The town has a restored quarter of crafts from the period of the
National Revival and a woodcarving school, which hosts annual contests on woodcarving. These
activities attract tourists that allowed fast development of hotel and restaurant businesses in the recent
years. There are great opportunities for summer recreation and tourism (eco-tourism, rural tourism, family
tourism, organized, stationary, routes, high-mountain tourism with all conditions for common tourism and
rock-climbing). Municipality of Tryavna provides one of the best natural conditions for a healthy lifestyle in the country.
The population encounters some difficulties due to the single road connection to the inland area, featuring
the peculiarities of mountain roads.
The Neykovska river above the town of Plachkovtsi does not offer conditions for fishing (4.8.1). Amateur
fishing is practiced in the Plachkovska river (below the town of Plachkovtsi) and the Dryanovska river
(below the town of Dryanovo)2.
2
Names of one and the same river along its course.
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The health status of the population is characterized by the following data death causes are blood
circulation diseases – myocardial infarction, brain-vascular diseases, hypertension and malignant diseases
and diseases of the respiratory system.
Data on contagious diseases, which can be transferred not only through food products but also the water
route, do not differ from the mean values for country. Thus in the district Gabrovo the incidents of
dysentheria (shigelosis) in 2006 were 11,1, while the country average is 11,4 per 100 000; the incidents of
A-type hepatitis are 73,3, while the average for the country is 108. There are no data on the link between
these diseases and water quality in the district.
Hazardous infections such as cholera and abdominal typhoid, have not been established in the country for
over 40 years.
4.11. CULTURAL AND HISTORICAL HERITAGE
There are no data of any historical, archaeological or architectural finds on the territory of the dam. None
of the above has been registered during the construction of the Neykovtsi dam. Visual observations and
consultations with authorities undertaken during preparation of this report did not indicate the presence of
any such features. Should any finds be uncovered on site in the course of dam completion and reservoir
remediation, the procedures envisaged in the Law on Monuments of Culture shall be undertaken by the
Institute of Archaeology and the Archaeological museum.
V.
EVALUATION OF THE EXPECTED ENVIRONMENTAL AND SOCIAL
IMPACTS RELATED TO THE IMPLEMENTATION OF NEYKOTSI DAM
5.1.
AIR QUALITY
5.1.1
Climate
Dam construction will inevitably result in changes in the thermo-physical properties of the base surface,
and hence of the microclimate in the area surrounding the dam. The impact of artificial water reservoirs
on the environment has been a subject of long-standing examinations in Bulgaria. A methodology has
been developed for evaluation of microclimate features in areas surrounding dams [MS 8, 9, 10].
According to the preliminary studies the change will affect only the area of the dam since the gradient of
the meteorological elements is great and that may have only a favorable impact on the unaffected flora
and fauna. The availability of a huge water volume will cause a reduction in daily temperature
differences, as well as to improved conditions for humidification.
The recent decades feature significant climate fluctuations exhibited in alteration of dry and wet years, as
well greater frequency of extreme phenomena such as long periods of high temperatures, lengthy draughts
and heavy rains. Numerous examinations of climatic changes in Bulgaria exhibit significant statistic
trends toward decrease of rainfalls and increase of temperatures, which results in reduced humidity.
In the course of dam operation it shall be considered that the recent decades feature significant climate
fluctuations exhibited in alteration of dry and wet years, as well greater frequency of extreme phenomena
such as long periods of high temperatures, lengthy draughts and heavy rains. In order to realize an
environmentally sustainable management of the dam and the water stocks by avoiding the critical and
hazardous consequences it will be necessary to build up a meteorological monitoring system, comprising
a point for monitoring of the main meteorological components – temperature and air humidity, wind
direction and speed, quantity and intensity of rainfall and the overall solar radiation. It is recommendable
that the system should be based on automated meteorological station supporting remote data transmission.
Dam construction and operation do not result in harmful environmental consequences for the local
climate. Its proper management including reporting of data from the monitoring system will result in the
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Neykovtsi Dam
EIAS
optimal management of the water supply system and will have favorable impact on the environment in
the region.
5.1.2
Quality of atmospheric air
The use of construction equipment and transportation vehicles for construction purposes will generate
emissions of harmful substances in the ambient air of the construction site at the dam wall and in
Neykovtsi residential quarter during transportation of materials and facilities for the site, and in Neykovtsi
estate, village of Stoevtsi, and village of Kyosevtsi during transportation from the rock quarry.
The rock quarry is at a distance 800 m from the village of Stoevtsi, and 3 km from the village of
Kyosevtsi) and blast works do not impact the population. During the public discussions additional
clarifications were requested by the residents on the safety of the blast works to be performed at the
quarry. Water pollution during the blast works is prevented by adoption of the measures cited in Chapter
VII A (water sprinkling against water pollution).
No excavation works have been performed on the spillway, the chute thereto and the ejector. The humus
layer has not been removed (it is limited in quantity).
The sensitive areas of impact on air would be the concrete unit and the asphalt base, which to a great
extent are shielded by the forest vegetation.
Determining the type and quantity of air pollution emissions related to completion of Neykovtsi
Dam
During construction works
Places and factors that are relevant to air pollution in the course of completion of Neykovtsi dam are:
Completion of the dam wall;
Completion of the water intake tower;
Construction of a spillway, chute and ejector thereto;
Rehabilitation of technological roads on site;
Cleaning of the wall from vegetation and wastes;
Remediation of the dam reservoir.
Construction machinery with diesel traction will be used to that end. That will determine the amount of
harmful substances to be emitted in air.
Air pollution will be determined by the transportation means to be used for supply of materials and
equipment on site, rock fill from the quarry, transportation of wastes from the site to the depots.
Type and quantity of harmful substances, emitted by construction and installation equipment
The machine park will comprise: Bulldozer, excavator, vybro roller, compressor for compressed air,
installation valve and other machinery mainly with diesel traction. That factor defines the type of emitted
harmful substances, prevailing among which will be:
sulphur oxides (mainly sulphur dioxide);
nitrogen oxides (mainly nitrogen dioxide);
volatile organic substances (VOS);
carbon oxides - incl. monoxide of high toxicity.
Amount have been estimated for the following conditions:
The actual capacity of machinery used;
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There intermittent utilization within the framework of the planned time schedule for site
completion;
Ratio for intense utilization of working time per shift (about 0,5).
The data obtained as a result of the above conditions are specified in Table 4.
Table 4 Emissions from construction machinery
Transportation regime
Harmful substances
SO2
NO2
VOS
CH4
СО
soot
Per hour
g/h
140
1700
250
6
600
0,02
Per shift
Kg/shift
1,4
20
35
0,05
7
0,006
The estimations are tentative and depend on the condition and type of machinery and the work
organization on site [MS 3].
The estimated emissions due to the transportation trucks to be used was made at the following restrictive
conditions:
Number of heavy duty trucks - 2 No
Diesel traction – consumption of 38 l of fuel per 100 km.
Length routes for supply of materials - about 10 km.
The emissions due to site transportation (Table 5) have been computed for one vehicle with diesel traction
and maximum 10-km mileage for transportation of materials. [MS 6]
Table 5 Emissions due to motor transport
SO2
NO2
VOS
CH4
СО
СО2
kg/race
10
109
21
0,6
90
7900
Linear emission
g/km
1
11
2,08
0,06
8,7
800
For transp. fleet
g/km
2
22
4,2
0,12
17,4
1600
Emissions
10 km
The availability of a temporary storage area for inert materials and a concrete unit at the existing
construction site above Neykovtsi residential estate, in the immediate vicinity of the evaluated site, will
have a favorable effect on air due to shortening of the routes for supply.
Special measures will have to be taken against pollution and gassing of eastern parts of the village.
During the operation phase
There will be no emissions of harmful substances in the atmospheric air during the operation phase of
because there are no pollution sources.
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Defining the strength of impact on atmospheric air
During construction works
The site is located in the immediate vicinity of a residential area (300 m away) – Neykovtsi housing
estate. Trucks carrying material from the rock quarry would pass through the village of Stoevtsi, village
of Kyosevtsi and Neykovtsi estate. Another adverse factor is the relief of the terrain surrounding the site,
which prevents strongly natural ventilation. Therefore there is real danger that during intensive work
coinciding with a long dry period the admissible limits of the acceptable environmental risk for people
and plants in the region should be exceeded. In that case the significance of the impact may be classified
as considerable; short-term and within the framework of the planned period and the working shift; the
cumulative effect is present in case the oxides have simultaneous impact (SOx, NOx); there will be
synergy in case of simultaneous presence of sulphur oxides and fine particulate matter in air.
Adverse effects may become stronger if the proposed measures and techniques for prevention of air
pollution are not implemented systematically, namely:
In the course of construction of the dam wall and transportation of wall material and equipment from the
rock quarry through the villages and the town of Plachkovtsi, the used roads shall be sprinkled with water
and the trucks transporting rubble shall be covered.
In that case there will be no danger of impairing the air quality in Neykovtsi estate, the rest of the
settlements and the town of Plachkovtsi. Only the house below the wall, which is cracked and hard to live
in even is summer time, will remain under direct impact.
DWTP
The DWTP is at a good distance (2 km) from Tryavna, and its construction and the nature and scope of
construction works will contain no threat in terms of air pollution neither for the working environment,
nor for pollution in town. It is said in the design of the DWTP that during the operation phase the DWTP
may cause pollution of the atmospheric air in case of occurrence of emergency on site, but that would be
below the ALV, and with no impact to the population. It will be necessary to take into account these
conditions when updating the DWTP design and selecting the equipment.
During the operation phase
During the operation phase of Neykovtsi dam there will be no danger of impairing the air quality and
impact unfavorably the population due to absence of emissions of harmful substances in the atmospheric
air.
5.2.
WATER
SURFACE WATER
During construction works
The water required during the construction of the water supply system for Neykovtsi dam has been
determined and the water sources have been secured. They supplied the site during the already
implemented construction and can supply it until its completion. The service base used on the site until
2001 (offices, storage premises, bathrooms, etc.) can be renewed and used during the completion of the
water supply system. At present, it is being used and the concrete knot is working.
Due to the construction of the dam wall to a height of 16 m, there is no threat of contamination of the
waters of Neykovska river with un-dissolved particles (increased turbidity). During the construction of
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the front spillway, chute and ejector, construction water should go through a mechanical settling tank (at
the end of the ejector) and then be discharged in Neykovska river.
The design of Neykovtsi dam from the 1970s determines high waters and the deposits to the dam wall
range. On the basis of the obtained results, the dimensions of the front spillway, chute and ejector have
been determined. The dead volume (for 100 years of dam operation) has been determined. However,
hydrological information needs to be updated, including the high waters. Taking into account the increase
in the class of the dam wall, it is necessary that a new design be developed for the spillway, chute and
ejector.
Chemical toilets will be used on each construction site for the domestic wastewater, and a contract needs
to be signed with a company to service them.
There is no need to construct a temporary settlement. The organization of construction is preserved from
the time of the constructed part of the wall, when the construction workers were recruited from nearby
settlements and spent the night at their homes.
The movement of construction machinery and transportation vehicles should be strictly limited on the
territory of the construction site. Transport routes should be marked. The technical condition of the
machines must be inspected before each shift and those in faulty technical condition should not be
operated. In case of potential emergency oil leakage, it is necessary to carry out an immediate
deactivation of the soil through mechanical removal against contamination of surface and groundwater
and soils. The use of the equipped and operated construction site provides the possibility for servicing the
machinery park of the site.
The DWTP construction began in 1985, and the design needs to be updated in view of the geological
conditions, the need for strengthening measures and cracks which have appeared in the completed
concrete. The engineering and geological report of 1992 includes solutions for discharge of all waters
outside the DWTP site during construction, without posing a threat for the water intake (discharge of the
construction waters in compliance with it categorization).
During operation
For the period of operation of the dam wall and the DWTP, the respective water sources and water
consumption for the operational staff of the two sub-suites have been determined.
Changes in the riverbed condition
The completion of Neykovtsi dam will form an artificial lake with a volume of 4.80×106 m3. The water
level will increase to an elevation of 580.95 m (highest water level – HWL). A reservoir with a slowed
water exchange is created, despite the continuous abstraction of water for water supply. Maintaining a
minimum environmental flow will mean that the river immediately downstream of the dam will not dry
up in the summer periods.
Water contamination
The data from the analysis of the water quality of Neykovska river indicate the need for construction of a
DWTP. It has been designed and constructed up to about 40%. An update of the design is necessary.
Neykovtsi dam in the period of operation does not represent a source of contamination for the water in
Neykovska river. The discharge of water through the main ejector will take place under an adopted
Program in the operational instructions both in periods of low waters and of high waters.
In order to ensure the purity of the dam waters, the following is envisaged: cleaning the lake bowl and
design of sanitary-security zones (SSZ) І, ІІ and ІІІ. The design and allocation of the zones is under
Ordinance No. 3 on the conditions for analysis, design, approval and operation of SSZ around water
sources and facilities for domestic drinking water supply.
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The initial designation of the sanitary zones was carried out in the preliminary developments from 2007.
The precise planning of the cleaning of the lake bowl and the zones will be carried out in the technical
working design following the geodesic survey.
On the left bank of the lake, up to 1952, there were several residential buildings (Kolyo Ganev borough).
The buildings have been destroyed, but there is an old cemetery, which falls within the future lake and
needs to be removed and cleaned. The last funeral took place in 1980. A procedure needs to be
implemented under the requirements of the Ministry of Healthcare for removal of about 8 to 10 graves.
In zones І, ІІ and ІІІ, there is strict regulation of the prohibitive and restrictive activities, whose
observation is controlled by the Ministry of Healthcare through its units – the Regional Inspectorates for
Health Safety and Control (RIHSC).
Treatment modules need to be planned for domestic wastewater from the two administrative buildings
(the one for dam operation and that to the DWTP).
Deposit runoff
In the feasibility studies carried out by ―Vodocanalengineering‖ EOOD (the former IPP ―Vodproekt‖) of
1972, the dead volume is determined on the basis of an estimate of the deposit runoff amounting to
1.00×106 m3. The barraging of the river with the constructed part of the dam wall has not led to visible
accumulation of deposits. Nevertheless, for the updated design of Neykovtsi dam, it is necessary to carry
out an additional study regarding the size of the deposit runoff.
The amount of sedimentation runoff affecting Neykovtsi dam will be determined to a large degree by the
extent of afforestation of the areas surrounding the dam.
Defining the Ecological flow regime
The construction of Neykovtsi dam disturbs the regime of the natural river runoff of the Neykovska river.
In order to preserve the river ecosystem of Neykovska River after Neykovtsi dam, the design envisaged
the discharge of an ecological runoff totaling 0.010 m3/s. This value was obtained based on model
analysis explained below and represents about 14% of the mean annual river runoff in natural conditions
(known to be of 0.073 m3/s). The model analysis was carried out to specify the ecological runoff under a
methodology developed in the Republic of Bulgaria [MS 1, 2, 4, 5]. The town of Tryavna is currently
supplied with water almost 100% from water catchments with an ecological runoff of 1 to 5 l/s.
A mathematical model is used, based on the dependency of the total number of the zoobenthos on the
runoff. The change of the total number is viewed as a probability process. In order to determine the model
parameters, data are necessary on corresponding values of the total number and the average monthly
water quantity, covering an overall vegetation period. To this end, summarized data were used from longterm nature monitoring for the whole territory of Bulgaria. The Fisher criterion and the change of the
zoobenthos cenosis in different regimes of the ecological runoff are used. A program has been developed,
with the help of which the calculations were made.
The regime of the ecological runoff is determined under the following scheme:
 Modeling the development of the zoobenthos in natural runoff regime [Figure 10].
 Modeling the disturbed runoff regime after the dam, under a balanced method in different
ecological runoff regimes [Figure 9].
 Modeling the development of the zoobenthos in the obtained different regimes of disturbed
runoff [Figure 10].
 Comparison of the obtained rows of average monthly values of the total number of zoobenthos
in a disturbed regime with that obtained in a natural one, in order to select a suitable ecological
runoff regime.
For Neykovtsi dam the model has been evaluated for the proposed environmental runoff of 0,010 m3/s
envisaged in the design.
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The runoff norm for the dam regime was defined by the designer in the amount of 0.073 m3/s. To obtain
the monthly values, HMS No. 23350 on Dryanovska River at the village of Tsareva Livada was used as
analogue. A hydrological row of monthly values for the period 1961-1998 was calculated. Figure 8
shows the hydrograph of the average annual runoff for the period in question. Figure 9 shows the average
annual hydrograph. Water balance of Neykovtsi Dam has been calculated and the disturbed regime of the
runoff has been established.
Due to the small size of the natural inflow of Neykovska river, the dam will overflow extremely rarely.
After the dam, the regime of disturbed runoff is formed by the discharged ecological runoff. Figure 10
shows the results of the applied model for development of the zoobenthos in an undisturbed and a
disturbed runoff regime.
The proposed ecological runoff of 0.010 m3/s maintains a stable ecosystem in Neykovska river and
corresponds to 13,7%Qo, which is >10%Qo (national norm). It is recommended that discharge of larger
water quantities up to the 0.100 m3/s are performed for 10 days monthly in March, April and May during
spring floods. The same quantities should also be discharged in October in order to ensure juvenile
cyprinids movement downstream of the wall.
The defined ecological runoff is in compliance with § 125 of the Transitory and Final Provisions of the
Law for Amendment and Supplement of the Water Act: ―Until the methodology under article 135, item 1
is issued, the minimum admissible runoff in rivers is defined as 10% of the average multi-year water
quantity, but not less than the minimum average monthly water quantity with availability 95% to the point
of each facility for runoff regulation or water intake.‖ This regulates by law the minimum admissible
runoff in rivers in case their natural regime has been disrupted as a result of construction works on water
supply facilities. For Neykovski dam the Qec. = 0,010 m3/s corresponds to 13.7 %Qo.
The development of a model for determining of the environmental runoff (minimum admissible runoff) in
river flows after construction of water supply facilities has been launched in the 80-ies of the former
century by a team comprising a hydro-engineer and hydro-biologists. In 1986, the model was presented
and adopted by a Scientific Council with the Research Center at the Environmental Protection Committee
(the present MOEW). In 1987, a doctoral thesis was defended [MS 4] on the topic. The model is based on
the connection between the water quantities flowing through the river and the total number of zoobenthos
(the abundance of zoobenthos). Zoobenthos is recognized as an indicator for the status of the river ecosystem and its abundance relates directly to the water quantity in the river. The model applies
hydrological indicators, and is not based on hydraulic parameters. It allows by means of various regimes
of disturbed natural river runoff to determine the size of the disturbed runoff, at which the river ecosystem preserves its biological integrity.
Since 1987 the panel of experts who prepared the EIAS for Neykovtsi Dam and hydrobiologists from the
Institute of Zoology at the Bulgarian Academy of Sciences have been carrying out a research of the
condition of river flows at one of the largest hydro-technical facilities in the country – ‗Batashki
vodnosilov pat‘ (after all dam walls and water intakes). The impact of disturbed runoff on zoobenthos has
been established (at ‗Batashki vodnosilov pat‘ no water quantity had been let after the facilities, which
were commissioned in operation in 1957-1959).
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0.160
0.140
Q, m 3 /s
0.120
0.100
0.080
0.060
год
0.040
0.020
0.000
1960
1965
1970
1975
1980
1985
1990
1995
2000
година
Figure 8
0.18
0.16
Q, m3/s
0.14
0.12
0.10
0.08
0.06
0.04
0.02
0.00
1
2
3
4
5
6
7
8
9
10
11
12
month
Figure 9
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400
total benthos
abundance
350
300
250
observed data
200
150
simulated data under
undisturbed conditions
100
simulated data under
disturbed conditions
50
0
4
5
6
7
8
9
10
11
Month
Figure 10
At the same time it was observed that the river flow recovers along the river sections after water
containment facilities as a result of the additional water confluence, (a small river tributary 250 m
downstream of the dam) as well as the impact on the ground water, land eco-systems and residential
areas. Monitoring activities were launched on many of the large rivers in Bulgaria by means of
hydrobiological sample-taking for zoobenthos. Data was collected for different rivers ranging from 1 to
20 years (Osum, Vit, Iskar, Yantrs, Arda, Mesta, Vucha). It was established that zoobenthos in the rivers
of northern and southern Bulgaria is identical. That made it possible to apply the model in 1995 to the 14
largest rivers in the country for a ―Strategy on the utilization of water resources and water protection in
the Republic of Bulgaria‖ [MS 1]. The mathematical model was upgraded in that period and in 2000 and
its application was expanded to the ―Master plans for water utilization in basin management areas of the
Republic of Bulgaria‖ [MS 2]. The upgrading of the mathematical model was defended in a doctoral
thesis in 2004 [MS 5]. [Based on the results achieved from monitoring of both natural river flows, and
below disturbed water supply facilities, including such where the model has been applied to an EIAS and
the proposed minimum admissible runoff is secured, it is recommended that the adopted size should be
Qеc. (equal or above 10%Qo). This Condition underlies §125 of the Water Act (2007). The panel of
experts is currently performing monitoring under the operating hydro-technical facilities (the Iskar river,
the Arda river, the Vucha river) and very good results are being achieved due to the secured minimum
admissible runoff recommended in this EIAS for those sites, while for each specific case additional
conditions are being considered.
In the last 10 years, different possibilities have been studied for discharge of these waters from the dams.
In the case of Neykovtsi dam, this will take place from the water intake tower to a depth depth of 10m
from the water level of the reservoir. During the conditions of low water level, the water discharges will
be provided by the planned ecological runoff amounting to 0.010 m3/s, while during the spring floods
water will be discharged in the amount of 0.100 m3/s in March, April and May, and in October, for the
duration of 10 days each month.
At 250 m downstream of the dam wall a left tributary joins the Neykovska river (there is no hydrological
data about this tributary) and further down in the town of Plachkovtsi the Neykovska river flows into
Plachkovska river, which follows the seasonal fluctuations of the natural runoff taking into account the
additional water from the dam in springtime.
Release of high waters
The transmission of high waters is carried out through the spillway to the wall. The updated hydrological
information and the re-assessment of the dam wall class indicate the need for a new design of the
spillway, chute and ejector. This will be accommodated in the detail design.
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Transformation of the river ecosystem
The construction of Neykovtsi dam and the formation of a water reservoir will have both a negative and a
positive impact on the river inhabitants and the transformation of the river ecosystem immediately above
the reservoir into the system of a water reservoir (still waters). Gradually, the formation of a habitat
typical of still water reservoirs will take place.
The negative impact comprises:
 Significant reduction of the reobionte (river species), and respectively, the species, biocenotic
and functional diversity due to the decrease of the flow speed.
 Changes of the nature of the ground under the dam.
 Possibility of appearance of eutrophication.
Positive impact comprises:
 Settling of the suspended undissolved matter.
 Large-scale development of limnophila species,
that the impact is not a net loss of species richness and diversity, but instead a conversion from one
type of aquatic community to another.
 .
 Increase in the trophic resources and, respectively, productivity of the ecosystem.
No studies have been carried out in Neykovska River in terms of the macro-zoobenthos.
The studies in Austria and Bulgaria of Zhrebchevo dam show that under the dam walls, the river
condition is at least one saprobe degree better than that of the respective dam lake (Prof. B. Russev,
Institute of Zoology to the Bulgarian Academy of Sciences).
If the environmental management plan for Neykovtsi dam is observed and taking into account the
ecological factors (eutrophication, ecological runoff, deposits, etc.), there will be no deterioration of the
water quality and biological value of the river ecosystem under the dam, and if the measures prescribed in
this EIA report are applied, an improvement of the overall ecological condition of Neykovska river can be
achieved.
Cumulative effect
In the vicinity of the Neykovtsi water supply system there are no hydro-technical facilities constructed or
planned for construction other to contribute to a cumulative effect from its completion. The construction
of Neykovtsi dam ensures adequate water supply for the population in the towns of Tryavna and
Plachkovtsi and settlements in the region. It creates the possibility for achieving a ―good‖ ecological
condition of Neykovska river, development of certain recreation activities, and as a whole contributes to
the economic development of these towns, including as a tourist destination with high possibilities for
summer and winter recreation.
GROUNDWATER
Due to the high water permeability characteristics of the rock base and the possibility of groundwater
infiltration, it is necessary to pay special attention to the consolidation works during the wall construction
and the precise implementation of the cement-injection works on the anti-filtration curtain construction.
In order to control water infiltration through, under and along the wall, the design includes a monitoring
system of piezometres as a part of the Control and measurement system of the dam wall through which
monitoring will be carried out on the quality of infiltrating water and presence of suffusion.
Furthermore, it is necessary to carry out regular monitoring of the water inflow in the dam reservoir and
runoff in order to prevent emergency situations during heavy precipitation and intensive snow thaw (see
environmental management plan).
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Due to the presence of severely cracked and fissured slopes, anti-filtration curtains should be constructed
on both sides of the wall in order to avoid infiltration along it.
The lakebed should be covered by clay in front of the wall in order to reduce infiltration.
5.3.
GEOLOGICAL ENVIRONMENT
During construction
The technical and geological studies (para 4.3) prove the feasibility of construction of the selected dam
wall type.
The dam wall constructed to present date, along the upstream batter is severely damaged due to
precipitation and weathering effects, whereas the downstream batter of the wall is in good condition. This
imposes that at the beginning of the wall completion works the whole surface layer of the wall should be
removed and replaced with new material.
The wallslopes are heavily cracked and full of fissures, thus the implementation of anti-filtration fans is
recommended in order to avoid further infiltrations.
Additional studies of the Suhodole quarry are necessary to establish the quality and quantity of the
materials used for construction and further analysis will be provided during the update of the design.
During operation
The Control and measurement equipment built in the wall will monitor its behavior. This comprises
deformations in the wall and at its base, state of the diaphragms, sinking and shift of the crown, beams
and geological base.
The dam is situated in a seismicity zone of 7th degree, which defines the requirements for design and
operation.
5.4.
SOILS
During construction
Prior to construction, the change in land use for the dam and DWTP was carried out under the respective
procedure. Expropriation of the terrains was completed in compliance with the active normative
framework – former owner State Forestry (SF) ―Plachkovtsi‖.
The load on soils with dust, spent gases and blast works during construction will be insignificant. This is
based on experience in construction of similar dam walls, specified in Chapter VII A.
A new construction site is not planned – the base (former base of Hydrostroy) will be used at about 500m
below the wall, which is relatively well preserved (buildings for workers, garages and operational
concrete knot). The site terrain is municipal property. The construction site has been erected at the
beginning of the construction works – 1978 (Chapter VІІ.А) for construction management.
The cleaning of the dam bed requires scraping of the humus and its deposit for use in the reclamation of
all terrains affected by the construction of the water supply system. No site has been defined as a depot
for humus storage.
During operation
The total flooded territory amounts to 32.5 ha, which under the forest development plan of SF
―Plachkovtsi‖ of 2003 are forest land, but they have been excluded for the construction of the dam.
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5.5.
EIAS
WASTE
Type, character and quantity of generated waste
The forecast assessment of the type and character of generated waste in Neykovtsi dam completion is
related to the construction completed to present date and the need for activities to be carried out during
implementation of construction works for completion of the dam and DWTP.
Generated waste resulting from implementation of the construction and mounting works in the
completion of the water supply system can be viewed in two stages:
1. During the construction of the remaining part of the site.
2. During site operation.
The waste generated during the implementation of the remaining part of construction and mounting works
will result from the construction of the dam wall and DWTP.
During the operation of the water supply system, mainly domestic waste and waste from repair works will
be generated. During DWTP operation, production waste of specific character will be generated. Their
collection, storage and transportation should be carried out under the requirements of the Waste
Management Act.
During the completion of Neykovtsi water supply system, waste will be generated which can be divided
into:
 Domestic waste, generated by the construction workers and staff necessary for operation of the
water supply system (mainly domestic).
 Construction waste. This will be generated during the excavation, embankment, formwork,
fitting, concrete and formwork works on site. These comprise mainly:
 Waste from forestry. These results from the required cleaning of the dam bowl (rooting out of
the forest tree vegetation) and felling of forest vegetation and the anthropogenic vegetation
species on the territory of the site allocated for DWTP.
 Hazardous waste
This type of waste is generated both in the implementation of the investment proposal and during its
operation. It comprises as follows:
 Laminated boxes from paint and polish.
 Packaging containing remains of hazardous substances or contaminated with such.
 Glue packaging.
 Spent engine oil from construction machinery.
 Waste from oil and liquid fuel.
 Mixed packaging from raw materials and materials.
 Luminescent lamps.
 Production waste
These types of waste are generated mainly in the process of operation of DWTP and represent all types of
solid waste accompanying the process of drinking water treatment – initial filtration, coagulation of
substances with a colloid degree of dispersivity found in treated waters, purification, filter cleansing, etc.
These are mainly:
 Solidified waste from the filter presses of the treatment plant.
 Solid waste from the mechanical step of the treatment plant.
 Sediments from purification of treated water.
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 Sediments from the flushing of the sand filters.
This type of waste is generated in DWTP in the facilities for dehydration of sediments from the
coagulation chambers, and as a result of the treatment of wastewater from the treatment plant. They
contain both organic and non-organic components, which depend on the nature of the impurities in the
treated water and the introduced reagents in the technological treatment cycle. The estimation of their
qualitative composition and quantities depends on the qualities of the water supplied for treatment and the
technological scheme of the treatment plant, whose design is subject to update.
The individual types of waste with their codes, under Ordinance No. 3 of MEW and MH of 2004 on
waste classification (SG, v. 44/25.05.2004), generated during the implementation of the investment
proposal and operation of Neykovtsi water supply system are shown in table 6.
Collection, transportation, storage, detoxication, treatment, recycling and disposal
Collection, transportation, temporary storage, detoxication, treatment, recycling and disposal shall be
performed compliance with the requirements of the Wastes Management Act.
Description, analysis and assessment of the supposed significant impact on the population and
environment, resulting from waste generation and creation of discomfort
During the completion of Neykovtsi dam, there is a risk that the waste generated during site construction
and operation will have an impact on the individual components of the environment (ambient air,
landscape, surface and groundwater, soils, wildlife) and human health, if the measures for their reliable
management under the normative framework are not implemented.
Possible impact during construction
During construction, generated construction waste has a priority in quantity compared to the domestic
waste and that close in composition to domestic waste. This waste should be treated in compliance with
the normative waste management framework adopted in the country. Possible impact can be summarized
as follows:
Air Quality
Harmful impact on the air could be generated by potential unregulated and illegal incineration of some
types of construction waste instead of their separate collection and storage, transportation and
detoxification in an environmental way. Their incineration could result in harmful emissions, which will
contaminate in an uncontrolled way the air in the site region for a certain period of time. This type of
waste includes packaging from polyethylene and PVC, packaging from wood materials, composite multilayer packaging, mixed packaging from raw materials and materials, residue from paint, inks, glues,
adhesives and resins containing hazardous substances, wood material from construction, paper and
cardboard packaging, packaging containing residues from hazardous substances or contaminated with
hazardous substances.
Landscape
In the event of uncontrolled disposal of construction waste, the surrounding landscape will be disturbed
on adjacent terrains as a result of the anthropogenic impact of this waste on it. As a result of
dissemination by the wind of small fractions of this waste at large distances and their detention in shrubs
and trees, a negative visual effect will be observed. The predominant part of this scattered waste is hardly
degradable in the course of many years and will result in sustainable damage of the landscape.
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Water
There is a risk of water contamination in the event that during construction generated waste is not
collected, stored, transported and deposited in the depot in the town of Tryavna. First, the ambient water
running along the slopes of the waste stored on site and not transported will be contaminated. It, in turn,
can contaminate the surface water, in this case – the water in Neykovska river – or some of it can
infiltrate down to the subsurface aquifers and cause significant and sustainable contamination in some
aquifers.
Soil
Some of the waste generated during construction is classified as hazardous. If irresponsible and
uncontrolled disposal (storage) of this waste is allowed on site territory, as a result of the flow of ambient
water down the slopes or their infiltration through the waste, the underlying soil will be contaminated.
Wildlife
The uncontrolled disposal (storage) of waste allows free access of animals and especially birds to it. This
free access to illegally deposited waste, the use of the surrounding vegetation and the waste itself for food
can lead to the spread of diseases at undetermined distances, as well as the death of some animals and
birds. In this way, the biodiversity in the region will be disturbed.
Human health
Harmful impact on the individual components of the environment will inevitably have an impact on the
health of the construction workers, local population and, possibly, tourists visiting the region.
Possible impact during operation
During operation, mainly waste from DWTP operation and from required repair works will be generated.
Production waste will be in insignificant amounts due to the fact that the DWTP will operate with
relatively clean waters, such as the water in Neykovtsi dam. Taking into account the fact that repair works
will be required rarely, waste formation in this activity will be one-time, their amount will be small, and
the collection, storage and transportation for detoxification will not present a problem. Domestic waste
during operation will be in insignificant amounts. It is necessary to place suitable containers for their
collection and transportation to the waste depot in the town of Tryavna.
Cumulative impact
If the prescriptions and conditions in the normative framework for waste management are observed, the
impact of the waste generated on site territory on the individual components of the environment will be
insignificant and without cumulative impact.
Waste has a direct or indirect impact on each of the components of the environment and human health if
measures are not taken in advance to restrict this impact. During the construction and operation period, it
is not necessary to plan a separate group of measures due to the fact that the type of waste during the two
stages of completion of the Neykovtsi water supply system (the dam and the DWTP) is not significantly
different
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5.6.
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HARMFUL PHYSICAL FACTORS
Noise
During construction
The sources of noise in the environment are most types of works related to the completion of the water
supply system (excavation, embankment, concrete, formwork, mounting, drill and detonation, transport).
The levels of noise emitted by the main used machines and equipment are: excavator – 8091 dBA;
bulldozer – 97105 dBA; autocrane – 9298 dBA; asphalt mixer – 84 dBA; concrete mixer –
8893 dBA; roller – 87 dBA; vibromass – 98106 dBA; stone grinding installation – 8896 dBA; drill
hammers – 105120 dBA; heavy automobiles heavy-weight automobiles – 8590 dBA; compressors –
8699 dBA. During blast works, impulse noise is emitted with levels depending on the detonation
system. Construction equipment is concentrated on specially designated territories and sites: terrain for
construction of the main site – dam wall, the DWTP, auxiliary and production facilities – stone quarry,
Road Information installation, concrete facility, technological road network for connection between the
sub-sites. The expected equivalent levels of noise on the individual construction sites in the immediate
vicinity of the groups of operating machinery and facilities are around, and sometimes above, 90 dВА.
The construction of the wall, its facilities and DWTP will be implemented at the same time. The
technological network for the vehicles servicing construction has been completed. The heavyweight
automobiles, at an average of 5 courses an hour, will create noise with an equivalent level of about 6061 dВА at a distance of 7.5 m from the movement axis.
The limit values of the noise level for the different territories and zones regulated in Ordinance No. 6 on
the indicators for noise in the environment (MH, MEW, 2006) are: for residential territories: day –
55 dВА, evening – 50 dВА, night – 45 dВА; for production and storage zones: day, evening and night –
70 dВА.
The residential territory closest to the site – Neykovtsi residential area in the town of Plachkovtsi – is
about 300 m from the dam wall site. Due to the sufficient distance, the construction activities on the site
will not be a source of noise above the norm for residential terrains during the day (7:00 ч19:00 hours)
and evening (19:00 23:00) periods. At a closer distance (about 100 m), there is only one house for
temporary accommodation, heavily cracked, for which exceeding of the hygiene noise norms can be
expected, reaching about 6 dВА in the day period and about 11 dВА in the evening, during the operation
of the nearest construction equipment.
The sites of the stone quarry and grinding installation are 700-800 m away from the outlying houses of
the village of Stoevtsi and will not be a source of noise for the residential terrains due to the sufficient
distance and the screening role of the relief. The planned small number of detonations (up to two per
month) will not have a significant disturbing effect on the settled area in terms of noise.
The embankment and concrete works on completion of the dam wall will be alternating. The freight
vehicles transporting ground stone from the quarry will pass through the village of Stoevtsi, the village of
Kyosevtsi and Neykovtsi residential area. The route of the concrete trucks from the concrete base will go
through Neykovtsi residential area. Equipment for the site will come from the town of Tryavna through
the town of Plachkovtsi. The roads in the region are low in traffic and there are no other significant
sources of noise. The transport servicing construction will deteriorate the existing acoustic environment
of the adjacent residential terrains by the transport routes and in certain intervals exceeding of the hygiene
norms for noise can be expected amounting to about 6 dВА for the day period and about 11 dВА in the
evening. The noise impact will be limited in time, until the completion of the construction works on site.
During operation
During site operation, a source of noise will be the DWTP equipment (pumps, mixers, blowfans,
hydrophore, etc.). According to their technical characteristics, the levels of emitted noise are within the
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range of 70-75 dВА. The equipment will be placed in a massive building with concrete construction, with
suspended sound insulation of the façade walls not less than 35 dВА. Noise levels higher than 45 dВА are
not expected, which is far below the hygiene norm of 70 dВА.
The DWTP is at a sufficient distance from the town of Tryavna (about 2 km) and will not be a source of
noise for its territory.
5.7.
PLANTS
During the construction period
During the construction works for Neykovtsi dam cleanup of 32.5 ha including cutting and uprooting of
vegetation must be carried out. The future reservoir has been excised from the forested area managed by
the Plachkovtsi State Forestry Board.
The construction of the Neykovtsi reservoir will affect directly only the flora currently existing within the
reservoir. No impacts on the forest trees, grass and brush vegetation (outside the reservoir) are expected
during the construction period.
The Drinking Water Treatment Plant site will require 2.5 ha, which includes trees of the Tryavna State
Forestry Board (1.0 ha) and farmlandswith anthropogenic species (1.5 ha). The alteration of the land
purpose and the expropriation procedures have been completed in accordance with the requirements of
the law.
During the operation
The project requires flooding of of 32.5 ha.
The studies carried out in 2007 for the Due Diligence report established that no rare and endangered
species are affected by the construction of the water reservoir in accordance with the legal provisions.
Certain restrictions must be implemented in order to avoid any impact on the Balgarka protected area (no
areas beyond those covered by the design shall be affected during construction). Securing of the
minimum admissible runoff in the Neykovska river during summer low-water, the release of additional
water during the spring floods and the additional water inflows from the left tributary, will impact
positively the downstream area of 800 m.
5.8.
ANIMALS
The estimated impact of the Neykovtsi water reservoir on the animals was based on the factors indicated
in Section 4.8 and on consideration of the anthropogenic activities in the area and in the Neykovska
River.
5.8.1.
Ichthyofauna
Assessment of the impact on the ichthyofauna
The construction of the future Neykovtsi dam located inline of the Neykovska river is at an advanced
phase. While the dam has been constructed to a large extent, the integrity of the river continuum is
presently maintained via the constructed main outlet.
Expected impact on the river ichthyofauna
 No direct impacts on the ichthyofauna along the middle stretch of the Dryanovska River are
expected during the construction works for completion of the dam.
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 The commissioning of the Neykovtsi dam will be conducive to the stabilizing of the flow
regime along the middle stretch of the Dryanovska River by means of controlled releasing of the
ecological flow and will, therefore, have a positive effect on the entire complex of ichthyofauna
in this area. The expected improvement of the Balkan barbell population is particularly
important because this species is indicative of the ecological status of the water body.
 Once the lake is flooded, it and the upper stretch of the river will provide the conditions
required for a stable and diverse lacustrine fish community.
Potential threats
Two potential negative impacts on the river biota in the Neykovska (and, respectively, Dryanovska)
Rivers can be identified in relation to the management of the future water reservoir:
 Insufficient water within the Neykovska River bed and, therefore, reduced flow regime in the
Dryanovska River.
 Releasing of water from the lower layers of the dam with constantly lower temperature and
increased concentrations of nutrients.
To avoid these threats and achieve good ecological status of the surface water bodies and the compliance
with the Natura 2000 requirements to protect habitats and species, the following actions are required:
 Ensuring of sufficient water-flow in the riverbed downstream of the reservoir at 10 l/s during
the low-water periods.
 Location of the water extraction facilities at a depth of no less than 10 m in order to ensure the
ecological minimum, to be developed in the detailed design.
 Development of a management plan for the water within Balgarka Protected Area, especially in
the Dryanovska River watershed, which included Bulgarka and the Dryanovska Reka, protected
areas, with measures for restoration, protection and sustainable use of biodiversity in the
Dryanovska River basin. The development of these plans has been provided for by CoM
DECREE № 349/27.01.2009 and by the Ordinance on the terms and conditions for
development and approval of Protected areas management plans
The Neykovtsi dam may have an indirect effect on Dryanovska Reka Protected Area, BG 0000282
situated downstream of the dam. The specifics of the spatial distribution of the populations (indicated in
4.8.1) mean that only indirect positive potential effects on the riparian ichthyofauna may be expected.with
the stabilization of the river flow and discontinuation of seasonal drying up. The proposed mitigation
measures can prevent negative impacts on the ichthyofauna as listed in the EIA.
5.8.2.
Invertebrate
The specified invertebrate species subject to protection under the subject and purposes of PA Balgarka
BG 0000399 will not be affected.
5.8.3.
Herpetofauna
(Amphibians and reptiles)
Assessment of the impact on the amphibians and reptiles
All amphibians (the first 7 species from Table 4) are certain inhabitants of the dam site. They will have
better living conditions once the dam is operational because the Neykovska river at the dam will no
longer dry up almost completely during summer. It is certain that the marsh frog will become most
abundant in a few years from the creation of the dam. Populations of reptilian species such as the green
lizard, wall lizard and smooth snake will be displaced from the reservoir area and will need to shift
upward along the slopes. The area to be flooded represents only a negligibly small part of the areas
inhabited by those species in the area. The enforcement of a sanitary protection zone around the reservoir
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will also be favourable to the environment and the wildlife including including the amphibian reptile
fauna.
The construction and the operation of the Neykovtsi dam will not have any negative effects on the
amphibians and reptiles in the region and will even be favorable to the water-demanding species.
5.8.4.
Mammal Fauna
Assessment of the impact on the mammal fauna
No substantial loss of habitats for mammals is expected due to the small size of the flooded area and the
low density of species within that area. The mammal species which are found in the area are not unique
to this location but are widespread: Stara Planina, Sredna Gora, the Rhodopes and elsewhere in Bulgaria.
The period needed to complete the dam construction will be short and should have little or no impact on
the trophic base and habitats of mammals in the area and should not reduce their numbers. This
conclusion is made as a result of many years of research by the expert from the Institute of Zoology at the
Bulgarian Academy of Sciences.
5.8.5.
Ornithofauna
Assessment of the impact on the ornithofauna
The previous construction works have already affected the area, including destruction of vegetation which
provided habitats for certain bird species. As with mammals, the rather small area to be affected means
that the additional impacts on the habitats of birds will be low.
Year-round releasing of the minimum admissible water quantity of 0.010 m3 required for the normal
functioning of the river ecosystem is envisaged. Therefore, the construction of the site will not have a
significant effect aon animal species inhabiting this part of the river and those who use the river as
drinking water source and for bathing, as well as certain bird species searching for food along the banks
and in the shallow parts of the river (mainly the gray wagtail and to the mountain wagtail in this part of
the river).
Three pairs of the red-backed shrike (a species listed under Annex 2 of the Biodiversity Act ) have been
registered in and around the project site, but their identified nesting areas will not be affected. Overall the
numbers of birds within the dam area is small and there are no locations where large numbers of birds of
any species are concentrated.
The flooding of the reservoir may be followed by the occurrence and subsequent increase in the number
of fishes typical of standing and slowly flowing water (through artificial fish stocking or entry of caviar
into the reservoir, naturally transferred by water fowl). This will increase the trophic base of certain
diving bird species such as Grebes (Podicipedidae), cormorants (Phalacrocoracidae), smew (Mergus
albellus L.), diving ducks (Netta rufina (Pallas), Aythya sp. etc. and also the potential occurrence of
individuals of these species during certain periods. The artificial lake may attract during the year
individuals of other waterfowl species – river ducks (Anas sp.), storks (Ciconia sp.), herons (Ardeidae)
etc., despite its mountainous location. This would increase the composition of bird species in general in
the river and in the area, and can be considered a positive effect.
No impact on bird migration in this part of the country is expected as a result of the construction or
operation of the dam.
In conclusion, no negative changes of the state of the species of significance for conservation and of their
habitats can be expected as a result of the implementation of the project. The area covered by the water
reservoir is of insignificant size and will not cause any significant reduction in the trophic base of the bird
species inhabiting the area, and will even increase the trophic base of a certain numbers of water fowl
species.
The mammals and birds are mobile and it is expected that during construction activities the individuals
will withdraw to adjoining areas, which it is believed can accommodate them.
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5.9.
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LANDSCAPE
The appropriate architectural design of the DWTP, color selection and greenbelt setting, site reclamation
and dam flooding will create the new landscape.
The evaluation of the self-cleaning potential and recovery of landscape in the region in question
underlines the substantial capacity for inclusion and harmonization of the water supply system of
Neykovtsi dam with the nature environment. Lakes are no foreign element to mountains and the newly
created artificial lake will match the nature landscape. Being an element of the landscape, the minimum
size of the DWTP will contribute to its good fitting and visual acceptance. Biodiversity in Balgarka
Protected area will be preserved cue to the small area of impact (less than 0,1%) and no influence on
areas beyond the scope of the facility. Better conditions are created for the fish populations in Dryanoska
reka Protected Area due to the envisaged regime for supply of environmental water.
5.10. HEALTH FACTOR AND SOCIAL SIGNIFICANCE
In the course of construction works
Concerning the population
The dam wall is situated at 300 m above the last houses of Neykovtsi estate. There is a single house for
seasonal use (summer house) at about 100 m below the wall. The entire house is in cracks and is not safe
for dwelling. The quarry and the TMSI are located at 6 km from the wall, near the village of Stoevtsi, and
the nearest houses are located at 700-800 m. The relief of the locality provides noise shielding. The rock
fill for the wall will be transported along the route via the village of Stoevtsi - village of Kyosevtsi Neykovtsi estate - the dam wall. The concrete will be transported to the dam wall from the base at the
construction site of Hydrostroy.
In the course of construction works there will be an increase of:
 Fugitive emissions of fine particulate matter due to the increased traffic of heavy-freight trucks;
 Fugitive emissions of exhaust fuel motor gasses and emissions due to blast works in the quarry nitrogen and sulphur oxides, carbon dioxide, hydrocarbons etc.;
 Noise from motor vehicles, from works in the quarry and the rock crushers/RC/.
The increased road traffic for transportation of construction materials will be limited - not more than
5 races per day at the peak of construction works. Therefore noise, fugitive fine particulate matter
emissions and emissions of fuel gases will be insignificant, temporary and if properly addressed will not
have a negative impact on the health of the population. Blast works will be incidental and far from
habitable housing, so detonation gases and noise will not have and adverse impact.
Concerning the construction workers
During the works negative health impacts could be produced by a number of factors, occurring in the
working environment during the construction process, namely:
Non-favorable microclimate. Work will be going on in all four seasons in the open, in both excessive
heat and cold. Excessive heat could be a risk factor for incidents such as heat and/or sunstroke. If
prolonged, such conditions could lead to dehydration, loss of salts and microelements and heat
exhaustion. Excessive cold contributes to increased incidence of colds, muscular and bone complaints and
disturbances of the peripheral nervous system.
Noise. Drivers of heavy machinery and excavator operators will be exposed to excessive noise level in
the range of 80 - 90 to 100 dB/A. The excessive noise impact has a negative impact on the hearing system
and may cause the development of professional hearing disturbances. Noise could have negative
consequences for the central nervous system, sleep disturbances, neurosis-type complaints and is a risk
factor for arterial hypertension as well.
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Vibrations. The drivers of the heavy trucks will be exposed to general and local vibrations. Given the
new technology to be used, those vibrations maybe will not exceed the admissible levels. The use of
some, mostly outdated machinery may cause excessive levels of vibration, and hence damages to the
vestibular system, the locomotory system and the parenchyma; also the s. c. ―vibration disease‖ may
occur, which is a common occupational disease in this field of work.
Air pollution. Drivers of heavy machinery and excavator operators will be exposed to exhaust gasses
emissions. No harmful health effects are expected in this case, as they work in the open air. Furthermore,
excavation works will be limited in volume.
Dust. Construction workers are exposed to fugitive dust emissions. Large dust particles can only have an
irritation effect on the upper respiratory system
Exposure to metal aerosols and noxious gasses. During welding operations various quantities of carbon
oxide, carbon dioxide, nitric gases and metal aerosols (manganese, lead, iron or others, depending on the
type of welding material) are emitted. If welding is performed in closed premises or inside large pipes
those emissions can cause chronic occupational disturbances of the lungs (chronic bronchitis,
pneumoconiosis of the siderosis type).
Traumas. Construction workers suffer from the highest incidence of occupational traumas during
excavation and assembly works.
Heavy labor. Notwithstanding the fact that a large part of the construction operations are performed by
machinery, still heavy physical labor is required in a number of operations, including the lifting and
carrying of excessive weights. Another unfavorable aspect of construction work is that a lot of the
operations are performed in a difficult position, requiring considerably tension of muscles and limbs. This
leads to micro-traumas, diseases of the locomotory system, the nervous system and the muscles.
In conclusion, no unfavorable health effects on the population and the adjacent settlements can be
expected during the construction phase. It may have some disturbing effect but it will be insignificant and
temporary. The working environment will exert certain impact on the health of the construction workers
during construction works. However it will be of temporary nature and can be minimized by taking
adequate health and safety protection measures.
During operation
No changes in air humidity or the climate or expected during the operation of the dam. It is expected to
have a favorable impact for the population as new jobs will be created and new recreational spots will be
set up in its vicinity. Improved water supply will guarantee the elimination of epidemic via water
contamination. Consumption of drinking water, which meets Bulgarian and European standards of
quality, will have an indirect positive health impact for the population. Conditions will be secured for
development of tourism, which is a priority under the regional plan for development of Gabrovo District
and the towns of Tryavna and Plachkovtsi.
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5.11. SAFETY OF NEYKOVTSI DAM
5.11.1 Dam Safety practice in Bulgaria
According to ICOLD3 definition, there are 215 large dams in Bulgaria. 200 dams are of the embankment
type, 15 are concrete structures. The total water storage in the country is 7.6 km3.
The dams proposed within the Municipal Infrastructure Development Project are regulated by the Water
Sector Department of the Ministry of Regional Development and Public Works. Such ministry is in
charge of all water supply dams, for both domestic and industrial uses, in the country. Hydropower and
irrigation dams are regulated by different ministries.
There is clear separation between:
a)
b)
c)
Dam Owner: municipal water agencies;
Dam Regulator: Ministry of Regional Development, and
Independent panel of experts: academics and practitioners.
Dams are classified in accordance to the potential hazard that they represent. The classification follows
the one developed by ICOLD. Dam safety procedures are the same for all dams, irrespective of the hazard
classification.
At each dam, permanent monitoring staff is responsible for:




instrumentation readings;
periodic geodetic survey work;
visual inspections, and
routine maintenance works.
An operation manual contains instructions for observations and measurements to be carried out following
special of extraordinary events such as large floods and earthquakes.
Each dam has a program of technical control, which includes measurements, frequency and places of
measurement for the various kinds of phenomena occurring during operation. A procedure is in place for
the interpretation of observations and measurements, and for action taking based on the findings thereof.
Data from the control/ measuring systems are visualized and analyzed during the same day. In case of
observation of abnormal parameters and deviations from the usual values, additional measurements are
carried out. At periodic intervals, generally one year, the responsible staff in the head office prepares a
report on the technical performance of the dam. That report is reviewed by an expert council with
participation of leading specialists. The council makes decisions about needed measures pertaining to
maintenance of the dam, repairs or improvements, modifications to the program of technical control, etc.
Every dam in Bulgaria has an emergency plan, which is strictly inspected by the Regulator. Each dam site
is permanently connected to the head office, the civil defense, and local government representatives. The
Department of Civil Defense is responsible for the establishment of emergency preparedness plans,
including evacuation. In case of emergency, the dam owner immediately informs the Department of Civil
Defense on the type of risk or occurrence.
On every dam site there are emergency stockpiles of the necessaries materials for handling emergency
situations.
3
International Commission on Large Dams
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5.11.2 Specific norms and regulations
The safety of dam walls is of considerable economic, social and environmental significance.
Safety of Neykovtsi Dam is a consideration embedded back in the very investment proposal for the dam.
In Bulgaria dam design is regulated by the following regulations: norms for embankment, published in
1986; the fundaments of design norms for hydro-engineering facilities 1985, Norms for load and impact
of waves, ice and navigation for hydro-engineering facilities 1988, Design norms for buildings and
facilities in earthquake zones 1989. As the above-listed regulations are not recent, and given the lack of
an EC code on hydro-engineering facilities design, internationally recognized standards are also used,
such as those of the Department of the Army US Army Corps of Engineers, German standards and others,
as well as Bulgarian regulatory documents and standards for construction design, which are described in
the design Contract. Various risks are being considered in the process of design, such as the hydrological
risk of high waters with certain occurrence and seismic risk from an earthquake of a given intensity.
Designs comprise a section on control and measurement system (SCADA). Upon commissioning the site,
the designs feature also a Program of Surveillance and Measurements by means of SCADA, Operations
Guidelines and Emergency Action Plan (Crises Management Plan) for the duration of construction works
and subsequent operation of the site. The Neykovtsi dam wall was designated category ІІ (in 1978), but in
the course of project update, and because of being close to a residential area, most likely the dam will be
upgraded to category І with all the ensuing safety requirements.
When the State Acceptance Committee checks the site to be approved for operation, it also checks
whether all normative requirements have been met (Ordinance No 2/2003 on commissioning construction
sites in Bulgaria and minimum warranty terms on acceptance of construction and assembly works (State
Gazette 72/2003). The operational staff is employed at the beginning of construction and the specific
teams are defined as the site is being commissioned. The duration for dams being operable is deemed to
be 100 years (the time for the established volume to be filled by deposits).
To ensure dam safety during operation, Ordinance No 13/29.01.2004 on the conditions and procedures for
technical operation of dam walls and related facilities is to be followed. At each stage of the operation the
Surveillance and Measurement Program is implemented and regularly updated. On the basis of the
measurements the security of construction and engineering works is being assessed, as well as the impact
of the dam wall on the environment (degree of danger to the natural and material goods and human health
and life). Safety is assessed for normal operational mode, for work under extreme conditions and for
emergencies. Two times per year the operational teams perform a visual check on the wall, the water area
and the related facilities and issue a protocol with respective recommendations. The engineering analysis
of the wall status is performed by a person responsible for the technical operation of the site and is based
on the results of the engineering checks and measurement and control for a period of three years at most,
and is approved at an expert engineering board, appointed by the owner. Inspections to evaluate the safety
of the dam walls and related facilities are carried out by experts, which are not on the payroll of the
person, responsible for the site‘s technical operation. The first inspection is to be carried out before
reservoir filling, then at the end of the first operational period, not later than the 5 th year of regular
operation, and later on – by decision of an expert engineering board, appointed by the owner.
In case of floods of a level close or equal to the highest water level (hydrological risk), and if an
earthquake of a magnitude above VI by the МSK-64 scale (seismic risk), inspections are to be carried out
and full measurements taken by all measurement and Control System tools for all facilities, in accordance
with the Program on Status Analysis and Registration.
In extreme and emergency conditions the Crises Management Plan is to be implemented, which
formulates all tasks, relationships and responsibilities of the institutions, whose responsibility it is to react
in times of crises under the Crises Management Act.
Responsible for the safety of the dam wall are the technical operation team, the managers of the
operational unit and the company, which ensures the dam‘s operation (ViK – OOD, Gabrovo), as well as
the respective state authority and the relevant state institutions - the Ministry of Regional Development
and Public Works and Ministry of Emergency Situations – The Center for early warning is responsible for
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early warning in cases of disasters. The operational unit is responsible for the technical operation of the
dam wall and the facilities thereto, aquatic area of the reservoir and the river 500 m below the dam wall,
in compliance with the requirements of Ordinance № 13/29.01.2004 .
Risk
The risk is a possibility of certain damages occurring during an event of a given probability of
occurrence.
In view of operating the Neykovtsi dam, the following need to be considered:
 Hydrological risk;
 Seismic risk;
 Environmental risk.
Hydrological risk
The hydrological risk is the probability of certain damages caused by large floods with very low
probability of occurrence. The following is needed to prevent it as much as possible:
 The expected flood should be reliably defined and taken into account in calculating the type and
category of the facility to be constructed (calculations provided in the updated hydrological
data).
 The dimensions need to be established of the facilities needed to safely discharge the large flood
described above (eventually new design of the spillway, the chute and the ejector).
 Emergency rules and Action Plan need to be formulated in operational conditions (Operational
Guidelines and Crises Management Plan);
Seismic risk
The seismic risk is defined as the probability of certain damages occurring if earthquakes of a given
magnitude take place. The following should be done to prevent damages from occurring to the maximum
extent possible:
 Mandatory performance of a mirco-seismic study of the river area where the Neykovtsi dam is
planned to be built;
 The geological survey for the sites, including the updated geological report should include an
assessment of possible consequences of the dam foundations in the event of a heavy earthquake;
 Facilities should be designed and built in such a way as to provide for a safe outcome in the
event of a rated seismic impact;
 Rules and action plan in case of heavy earthquake during operation need to be formulated
(Operational Guidelines and Crises Management Plan);
The assessment of the possible negative impacts that the existing environment can have on the investment
proposal should feature both in the micro-seismic study and when the hydrologic parameters are being
determined, taking into account meteorological factors and climate characteristics (provided in the
updated hydrology study).
Environmental risk
The ecological risk for dam walls and related facilities is linked to the risk of changes in the quality of the
environmental components, as discussed in the EIAS. The environmental risk for the Neykovtsi dam has
been assessed in the Risk Assessment Table on the basis of the made projections.
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Table on the environmental risk ensuing from the construction and operation of Neykovtsi Dam
Environmental Components and Factors
Impact sources Atmospheric
Geological
Water
Soils
Waste
Noise
Flora
air
environment
Fauna
Health
+
+
Notes
In the course of construction works
Dam wall and
Neykovtsi water
reservoir‖
Transport routes
+
+
to ++
+
+
+
+
+
+
+
+
+
+
to ++
+
+
+
+
On passing from the rock quarry to
the site through residential areas
the villages of Stoevtsi and
Kyosevtsi, and the Neykovtsi
estate)
During the operation phase
Dam wall and
Neykovtsi water
reservoir‖
DWTP
+
++
+
+
+
+
+
+
+
+
+
(++) +
+
+
+
+
+
+
+
+
++ In operational environment
after emergency
low level expected
medium level expected
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5.12. TRANSBORDER EFFECT
The Neykovtsi dam is located immediately above the Neykovtsi housing estate and the town of
Plachkovtsi within 7.5 km to the south of the Tryavna town. The dam is built on the Neikovska river
which is a tributary of the Trevenenska River that discharges further in Yantra River, that flows
eventually in the Danube close to Svishtov town (in Bulgaria). Potential transborder effects relate to the
quality and quantity of water in the Danube River where it leaves Bulgaria, but these effects will be
negligible, as explained below.
Construction Period: During construction there will be no impact because water flow will not be
interrupted or reduced. The normal flow will continue through a diversion channel and measures will be
taken as outlined in the EMP to prevent pollution of water from construction activities.
Impoundment Period: During the impoundment period of the dam there will be a significant reduction
in the flow of the Neikovska River at the dam site. The amount of the reduction cannot be known
precisely at this time as it will depend on certain factors to be determined through the feasibility study as
well as the actual amount of precipitation. The proposed volume of the reservoir at present is 4.8 million
m3. The feasibility study will evaluate options for the rate of reservoir filling. For illustrative purposes,
the following table provides estimated impacts on the volume of the Yantra River at the Bulgarian border
based on filling periods of one year and four years. These estimates are based on a reservoir capacity of
4.8 million m3, the mean baseline flow rate of the Neykovska River at the dam site equal to 0.073 m3
/sec, and the baseline mean flow of the Yantra River at the Bulgaria border equal to 49.8 m3 per second
(1,573 million m3 per year) calculated in accordance with the Master Plans for utilization of waters in the
basin management regions of Bulgaria (Bulgarian Academy of Sciences -Institute of Soils and Waters,
2000). Based on these estimates, the reservoir could potentially be filled in just over two years while still
maintaining the required minimum ecological flow of 0.010 m3/sec (i.e. retaining 0.063 m3//sec during
impoundment period) with less than 0.2% flow reduction at the border.
Impoundment
time
Gross
storage
volume
29.4 months
4.8 mill m3
Average flow
rate retained
during
impoundment
0.063 m3/sec
Water retained
annually during
impoundment
1.99 mill m3
Flow of YantraRiver
into
Danube
at
Bulgaria border
Flow reduction at
border (ratio column
2:column 3)
1,573 mill m3/year
0.13%
Operational Period: During operation a transborder effect will be the water volume to be retained in the
country from the Yantra river, which flows into the Danube. About 80 small and big dams have been
constructed in the watershed of the Yantra river (the biggest water reservoirs are Al. Stamboliiski dam –
220×106 m3 and Yovkovtsi dam – 92×106 m3).
Neykovtsi dam is proposed to cover water supply needs, and the maximum demand for water supply in
the area of the dam has been calculated by the designer to be 5,60×10 6 m3/per annum. Assuming (as
stipulated in the sewerage dimensioning rates in Bulgaria) that approximately 80% of the water fed to the
water supply system is returnable, that is, it returns to the rivers through the sewer systems, the water
retained in the territory of R. Bulgaria amounts to 1.122x106 m3/year , in other words about 0.07% of the
run-off of the River Yantra entering the Danube.
The Republic of Bulgaria is a member of the International Commission for the Protection of the Danube
River but has no contractual obligation to submit certain volumes of water from the rivers of the Danube
basin to the Danube.
As required by World Bank policy, in March 2008 the World Bank (on behalf of the Government of
Bulgaria) sent letters to the Governments of Greece and Turkey and to the Danube Commission, notifying
them of the intended project and its implications for downstream water flow.
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5.13. SOCIAL IMPACT
The construction of the Neykovtsi dam will solve a major social problem in the municipality of Tryavna
by providing regular water supply for the population. Opportunities will be created for economic
development, reduction of unemployment, and increased incomes for the population with a chance to
further develop Tryavna municipality into a more attractive area for recreation and tourism.
The project has the following advantages: no migration of the population is needed, no loss of agricultural
lands or pastures (those have already been expropriated when construction had begun). Forests in the area
have also been expropriated and felled. The greater part of the anthropogenic impact in the scope of the
dam wall and the water reservoir has been realized.
No infrastructure sites will be affected. Mandatory restrictions will be accepted in the course of
construction works to secure the normal operation of the water supply network from the four water
intakes to the town of Tryavna. No road infrastructure is affected, and the bridge near the town of
Plachkovtsi will be strengthened. No waste depots, drainage or irrigation systems exist on the site
territory.
VІ.
ANALYSIS OF ALTERNATIVES
Possible alternatives for the Neykovtsi Dam construction have been considered in the ЕDDR of 2007.
The studies on the possible alternatives for the Luda Yana dam construction date back to the 1972. . The
following alternatives have been considered:
In terms of location: Several sites have been studied, including pumping water from Dryanovo and use of
mine water from Lev Mine. The mine located outside the water catchment of the river Neykovska was
closed down after 1989. In conclusion, the proposal for the location of the wall was made based on the
fact that Neykovtsi dam has no actual alternative for other water source. This was the preferred location
due to: availability of proper technical and geological conditions, sufficient area permitting reservoir
formation and securing multi-annual control, and availability of an asphalt road to the site.
In terms of quantity of water to be fed to the water supply system. The long period of design and
construction, accompanied by interruptions regarding works and design preparation resulted in the need
for several updates of the water demand in view of the demographic and economic development of the
region. The latest update was done in 1990, and restated in 1999 in the EIAS prepared for the DWTP.
Recently, the town of Tryavna, Plachkovtsi and the settlements in the municipalities have proven the
demand for the designed water quantity to be supplied due to the steady trend for development of summer
and winter tourism.
In terms of type of dam wall and related facilities The type of dam wall has been selected following an
analysis of the economic and operational safety indicators of similar walls for a seismic magnitude VIII
and a category II facility. The selection of the related facilities (water intake tower and front spillway with
chute and ejector) was determined by the terrain and the parameters of the spillway. The updating of the
design may result in upgrading the wall to category І and redesign of the spillway, chute and ejector.
A zero option of taking “no action” has also been considered but has been rejected, as it has been proven
that Neykovtsi dam is the only possible water supply source for the towns of Tryavna, Plachkovtsi and
the settlements in the municipalities. The scarcity of water in 2008 and the strictest water supply rationing
for almost 2 months proved that the zero option is not possible, and the only possibility for the region to
have regular water supply is to finish the construction of the dam.
The proposed site for DWTP was accepted due to its advantages concerning land expropriation and
proximity to the road network.
Currently the dam wall has been built to a height of 16 m and construction works have been halted for 8
years.
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Possible alternativesat present time: preserving the status quo, partial finishing, demolishing the dam
wall
The need to have Neykovtsi dam built
All data, collected by the team and the public hearing in Tryavna in YEAR, as well as the projections
made by VIK OOD Gabrovo indicate that there is need for water to be supplied to the above-mentioned
towns. Regardless of the negative demographic growth until 2006, the towns of Tryavna and Plachkovtsi,
and the settlements in the region due to the favorable climatic conditions, the rich cultural and historical
heritage and the exceptional initiative of the population, became in a really short term an attractive
location for development of tourism and recreation activities. Indicative is the interest in purchasing
residential real property, maintenance and rehabilitation of urban and rural environment and arrangement
of traditional crafts complexes in the style of the Bulgarian Revival such as woodcarving.
Environmental Impacts related to project alternatives
Preserving the status quo –suspension of construction works at the height of 16 m of the constructed dam
wall as of 2008. In this case an update needs to be made of the wall status and it should be conserved
regarding the costs for the proper safety measures. A spillway needs to be constructed, and a possibility
should be provided for large floods to be fed to the lower sections of the river, by building a power
extinguisher and correction. That would require the selection of a new site for the spillway and the
construction of a related road. Operational staff will be available to control the wall status via an updated
SCADA. Re-cultivation needs to be done of the quarry and the depots. A plan should be drawn up to
mitigate the visual impact from the stone embankment. Other remaining issues to be addressed are the
dewatering of the section of the Neykovska river below the dam wall to the town of Plachkovtsi and the
condition of the ichthyofauna above the wall from the downstream river sections.
Partial completion –A partial completion would mean to find an additional water source, which has been
proven to be lacking, and thus leaving unresolved the main social issue in the area - the water supply. And
as with the option described above, the additional engineering works will need to be done, at respective
costs; the wall design will need to be updated in conformity with existing regulations. This option is not
less investment-intensive, as new mitigation facilities will need to be built (construction of a new spillway
at a new elevation, and a new solution for the water intake tower). Operational costs will be almost the
same without the benefit of providing water for the two towns and the settlements in the municipalities. It
is not possible to compare the environmental impacts with the proposed alternative for completion of
Neykovtsi dam, as it is not clear what the wall height will be if it is decided to be partially completed.
Demolishing the dam wall. Demolishing the dam wall will have environmental consequences which are
hard to predict, because a natural passage way will have to be provided for the high waters, and the rock
embankment will have to be taken away and disposed of at an appropriate location. Concrete structures
will have to be demolished and the territory will have to be reclaimed. New operational guidelines and a
Crisis Management Plan will have to be formulated for the duration of the demolition works. The water
supply rationing in Tryavna, Plachkovtsi and the settlements in the region will remain in place.
The three options considered above are not justified and are not acceptable for Bulgaria in economic,
social and environmental terms. The first alternative implies investments without any solution of the
water supply issues. The result would be the adverse impact on the Neykovska river downstream to the
town of Plachkovtsi. In case of partial completion - up to the implemented height of the wall and flooding
- the water supply issues will not be resolved and it will be necessary to look for an additional water
source (no such one has been discovered in all that years since 1972) accompanied by new issues related
to the environmental impact. Demolishing of the constructed part of Neykovtsi dam will mean to continue
the water supply rationing for the settlements in the municipalities (in low water seasons) and result in the
specified negative impacts for the environment.
The towns of Tryavna and Plachkovtsi, and the settlements in the municipalities need the construction of
Neykovtsi dam because there is no other alternative for provision of water without rationing and at good
quality.
No changes had occurred in the period 2007 - 2008 that would require the review of these presented
alternatives. Summer low water (for over 2 month, when water rationing was introduced) in 2008 came to
reinforce the only feasible alternative to provide potable water for the population of Tryavna, Plachkovtsi
and the settlements in the region by constructing Neykovtsi dam.
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Given that there is no need to change the technology, the estimated investments (including borrowed
capital), operational costs, changes in the control and measuring equipment (monitoring devices) in
general, costs and benefits. All those are elements of the project for construction of Neykovtsi dam under
the option proposed by the Bulgarian counterpart.
VІІ. ENVIRONMENTAL MANAGEMENT PLAN
VII.A. ENVIRONMENTAL MITIGATION PLAN
The proposed Environmental Mitigation Plan including specific mitigation actions, institutional
responsibilities and some related estimated costs is presented in Annex 2.
A substantial part of the impacts on the environment as a result of the construction of the dam wall of
Neykovtsi Dam to a height of 16 m have already occurred.
30% of the construction works for the dam wall were completed by 2001: excavation works, 16 m
embankment, asphalt-concrete diaphragm at the elevation of the embankment; the majority of concrete
works on the water intake tower; fully implemented major water outlet; roads to the water intake tower
and the front spillway to the wall; uncovering of the rock quarry Suhodole and of the construction site to
the dam wall; two consistent fellings of forest vegetation in two different periods. The road network has
been implemented 100%, however the bridge at Plachkovtsi will have to be reinforced. There will be no
need to move population. The works to be implemented comprise implementation of the dam wall to the
crown elevation (26,0 m), asphalt concrete diaphragm, installation of SCADA equipment, construction of
a spillway, chute and ejector, installation works on the mechanical and electric equipment and
implementation of the DWTP.
The erection of the dam wall up to the height of 16 m and the diversion barrage in the wall serve to
prevent Neykovska river from pollution during the phase of dam wall completion. It will be necessary to
secure mechanical settling of construction waters prior to their discharge in the Neykovska river while
constructing the spillway, the chute and the ejector.
The remaining construction works require compliance with the technology for consequential
implementation of the embankment and the asphalt-concrete diaphragm, of injections and quality control.
These are dam activities in which the construction companies in the country have the required experience
(in the country there are 16 big rockfill walls – Belmeken Dam – 98 m, and and 98 big earthfill walls –
Ogosta Dam – 59 m).
This is the background for proposal of the Environmental impact remediation plan. It includes the
required measures both during the construction phase and during the operation phase of Neykovtsi water
supply system.
ATMOSPHERIC AIR
7.1.
Restriction of the impacted area within the construction period.
7.2. Use of mobile sprinklers to suppress dust emission along temporary construction roads and routes
through residential areas, construction sites and quarries for extraction of rock fill.
7.3. Regular adjustment of diesel and petrol aggregates during the time of use of construction
machinery and vehicles; compliance with the daily construction schedules in view of maximum
compaction of the operational regime; limiting to a minimum the so-called „idle motion‖ of machines.
7.4. Checking of the technical condition of the construction equipment and vehicles for eventual
failures, or leakages at each shift.
WATER
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7.5. Construction of water measuring point in the tail of the dam pond for measuring of received water
quantities.
7.6. Construction of measuring profile in a suitable place below the dam, after discharge of
environmental waters to control the size of environmental water quantity and securing the supply of
minimum environmental flow of 0,010 m3/s from the level of the water intake tower at an appropriate
depth (up to 10 m from the lake surface) and additional supply of 0,100 m3/s in March, April, May and
October – 10 days per month.
7.7.
Maintaining of sanitary protection zones І, ІІ and ІІІ around the dam.
7.8. Sanitization of the dam bed - felling and removal of the remaining tree vegetation and removing of
the humus
7.9. Reevaluate the size of the environmental flow after the water intakes at the two receiving
derivations, prior to their connection to the water reservoir.
7.10. Provision of chemical toilets during the construction phaseand construction of treatment module in
the buildings for the operation phase.
7.11. Construct a mechanical settling tank for settling of construction waters prior to their discharge in
the Neykovska river during the construction of the ejector.
7.12. Removal and remediation of the graveyard toward Kolyo Ganev neighborhood.
Geology
7.13. Investigation of the failure on the right slope (possibly also in the left one) and implementation of
the relevant measures to prevent any eventual seepage through it.
7.14.
Sampling of the clay core cluster and the material of the support prisms with boreholes for
acquisition of their deformation-strength properties in view of the computations of the dam wall
robustness.
Soils
7.15. Cleanup of pollutants in case of emergency spillages and leakages from mechanical equipment and
vehicles to prevent soil pollution
7.16. Compliance with the requirements for waste management in order to avoid soil pollution in
adjoining areas.
7.17. Perform regular supervision of the water area of the lake for establishing of any land erosion or
collapse during operation.
7.18. Remove the humus layer and select a site for humus disposal.
7.19. Observe the restrictions in view of PA Balgarka and avoid penetration in the area beyond the site
boundaries.
Harmful physical factors – noise
7.20. Heavy transportation vehicles used for dam construction shall comply with the admissible speed
limit on passing through residential areas while their speed on the roads shall be coordinated with the
affected municipalities and the town halls.
7.21. Construction equipment and the activities shall be focused on the main construction sites.
7.22. In general construction activities shall take place during the day.
7.23. Investigate the condition of the house next to the wall prior to launching of construction works in
order to prevent it from collapsing.
Wastes
7.24. The provisions of the Waste Management Act shall be complied with during construction and
operation.
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7.25. Construction works shall not be launched on the site prior to the Employer‘s submission of a
contract with a licensed company for transportation and disposal of hazardous and non-hazardous wastes
that will be generated during the construction and operation.
7.26. Exercise control on the Investor‘s activities for collection and transportation of wastes to the
relevant site for their treatment to be performed by a licensed company contracted In advance.
7.27. Establish and observe a system for separate collection of wastes, having the Investor responsible
for the smooth functioning of the system.
7.28. Collection and proper storage of any generated wastes in the course of construction works.
7.29. Foresee sufficient number of containers for collection of domestic, or similar wastes.
7.30. Transport to the depot in Tryavna the generated domestic and similar in terms of composition
wastes.
7.31. Construction wastes, as well as industrial wastes from the DWTP, shall be removed after a
preliminary agreement (contract) with the depot in Tryavna.
7.32. The generated ―hazardous‖ wastes shall be collected, stored in environmentally friendly manner
and submitted for disposal by licensed companies.
7.33. Unregulated burning of flammable construction wastes shall not be allowed.
7.34. Envisage a proper mode of operation and machine fleet for wastes transportation in order to
prevent from pollution roadside areas.
7.35. Ban replacement of oils and idle stay of construction machinery on site, in order to reduce to a
minimum pollution with used motor oils.
7.36. Watch for leakages of fuels and oils during operation of the construction equipment to be able to
take measures to prevent pollution of soils and waters (surface and ground).
Flora
7.37. Blast works at the stone quarry Suhodole shall be performed following a ‗ no debris‘ technology.
7.38. Species appropriate for the climatic conditions in the region and with the relevant landscaping
qualities shall be used for the biological remediation envisaged for the areas impacted by construction
works.
Fauna
7.39 Blast works shall not coincide with the reproduction period of fauna (end of April and May).
7.40. Maintain the required environmental flow, varied as appropriate according to season
7.41. Removal of individual species of land turtles above the water level prior to flooding of the area.
Landscape
7.42. Inspect and reinforce the bridge in Plachkovtsi
7.43. Design and implement a landscaping spatial plan for the territory.
7.44. Perform remediation of the impacted areas beyond the facilities at the end of the construction
works.
7.45. The building of the DWTP and the administrative building at the crest of the wall shall have a
proper architectural solution and shall be painted in a proper color.
7.46. At the end of construction works the impacted section of the national road network shall be
repaired.
Health
7.47. Proper bath, toilet and kitchen facilities, working outfit, personal protection kits and work and rest
balance shall be secured for the workers and drivers at the dam wall. The operational personnel at the
DWTP shall be equipped with the necessary protection means, including in case of emergency.
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7.48. Implementation of Ordinance No 13/2004, Operational Manual and Emergency Action Plan
The Emergency Action Plan shall be developed at the beginning of the construction works – for the
construction period, and as of the commissioning in operation – for the operation period. It comprises all
actions and situation related to industrial emergencies and natural disasters – high water, earthquakes etc.
VІІ.B. ENVIRONMENTAL MONITORING PLAN
The Environmental Monitoring Plan including proposed monitoring actions, locations of sampling and
frequency of collection as well as institutional responsibilities and some estimated costs is presented in
Annex 3.
Prior to construction and operation the Contractor, the Implementation Unit and the Owner shall update
their environmental monitoring plan including specifying targets and standards (for noise, water quality,
etc.) to comply with the requirements in the regulatory base specified in chapter 2 and in accordance with
the feasibility study and updated design.
The Monitoring Plan shall be updated, implemented, reported and controlled in compliance with Chapter
2. The Project control unit established with the MRDPW shall receive all the documentation related to
environmental management. The regular reports will be forwarded to the World Bank quarterly.
Institutional responsibilities for application of the mitigation measures and environmental monitoring for
Neykovtsi Dam
In the course of construction works
Responsibilities for impact
mitigation and
implementation of
monitoring
MRDPW (Employer)
RIEW V.Tarnovo
REGIONAL
INSPECTORATE ON
HEALTH SAFETY AND
CONTROL (RIHSC)
MOEW (EEA)
If needed – from the
accredited laboratory
Reporting
(accountable person – accounting
person – frequency)
The construction supervision and
RIEW, RIHSC (as per the
Monitoring Plan)
Construction supervision of
MRDPW
PIU with MRDPW to the Bank
(quaterly)
Taking of decisions on monitoring
implementation measures
Accountable institutions
Operations
and persons
Implementation of
The Contractor,
measures for
Construction
impact mitigation
supervision, Employer
and
(MRDPW) RIEW,
implementation of
RIHSC BD Dunavski
monitoring
region – Pleven
Project Implementation
Unit with the MRDPW
Institutional responsibilities for application of the impact mitigation measures and environmental
monitoring for Neykovtsi Dam
During the operation phase
Responsibilities for impact
mitigation and
implementation of
monitoring
VIK OOD Gabrovo
RIEW V.Tarnovo
BD Dunavski Region Pleven
NEYKOVTSI_en_F.doc
Reporting
(accountable person to
accounting person – frequency)
VIK OOD Gabrovo to
RIEW V.Tarnovo and
BD Dunavski region - Sofia
Taking of decisions on monitoring
implementation measures
Accountable institutions
Operations
and persons
Implementation of
VIK OOD Gabrovo
measures for
RIEW V.Tarnovo
impact mitigation
RIHSC
and implementation BD Dunavski Region of monitoring
Pleven
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Environmental management is performed by the competent institutions, i.e. MOEW, BD, EEA to
MOEW, RIEW, and RIHSC. The procedure for development, evaluation and acceptance of EIA, as well
as control on the implementation of adopted decisions in Bulgaria are regulated by law and are observed
strictly. They are harmonized with the European directives. The MOEW comprises a Directorate on
―Prevention Activities‖ and a line deputy minister, while RIEW comprise departments on ―Prevention
Activities‖. The authority of the above-mentioned bodies and their actual activities show their
professional competence. There have been many cases in which they have rejected EIAS or have returned
them for a rework, they have imposed sanctions, suspended construction works and operation of sites
because of failure to implement their decisions, and they have withdrawn rights under EIAS in case of
failed deadlines. Competent authorities cooperate actively with the municipalities and through them with
the population and the NGOs. The mayors of municipalities affected by the investment proposal and
representatives of NGOs are members of the Expert environmental councils for consideration of EIA.
Control on use of water and water facilities, as per the decision for water intake and use of a water
facility, is under the competences of the BD.
At local level recruitment of personnel for implementation of environmental management is done on a
competitive basis. All employees within the system are subject to annual training at national or local
level. Once per year the knowledge and skills of the operational personnel is checked and they get ‗no
objection‘ to proceed with the implementation of their tasks at work.
Thanks to state financing and support under EU programs, EEA and RIEW have been equipped with
modern devices for laboratory control on the status of environmental components and factors. EEA with
MOEW has been accredited for performance of environmental monitoring at national level. An annual
Bulletin is issued on the condition of all components.
Water and Sewerage Company of Gabrovo will take over the operation Neykovtsi Dam (the dam wall and
the adjoining facilities, water area and 500 m of the river section under the dam wall). It will set up an
operation unit with the required skills and responsibility (Water Act, Ordinance № 13).
VIII. PUBLIC HEARINGS
Public hearings were carried out at the time of EDDR and this EIA report development.
A public hearing on the Municipal Infrastructure Development Project was carried out on 2007 in
Tryavna, including the Environmental Due-Diligence Report for implementation of the requirements for
this procedure (public notification was posted at the town hall and in the local media). The attendants
raised the following issues: climate changes, safety during operation of the water supply system, capacity
for power generation, options to look for water sources in the southern slopes of Stara Planina. The public
supports the project for construction of Neykovtsi dam since the demand for regular water supply,
especially in Tryavna municipality, is extremely pressing. During summer low water period the
municipalities are on water supply rationingand during spring and autumn high water the water is of poor
quality. The town has been developing rapidly, mainly in the sphere of recreational and traditional
tourism however that would not be possible without a steady quantity of drinking and sanitation water.
Consultations have been made with the following administrative and competent authorities:
1. RIEW V.Tarnovo. RIEW V.Tarnovo has not carried an EIA procedure for Neykovtsi dam and
the DWTP because construction works were launched before 1991 when the Environmental
Protection Act introduced the provision for development of EIA (Annex: Protocol and letter).
2. Tryavna Municipality; A meeting was held with the mayor Stefan Blazhev and the head of TSU
eng. Kovachev. The municipality supports the construction of Neykovtsi dam that will secure
permanent water supply for Tryavna and the municipality. There have been no objections from
the community on the construction of the dam. (Annex: Opinion).
3. National service Nature Protection with the MOEW
The Environmental Due-Diligence Report of 2007 was submitted to Tryavna and Plachkovtsi
municipalities for a detailed presentation to the communities. Board notifications and announcements in
NEYKOVTSI_en_F.doc
58/63
Neykovtsi Dam
EIAS
the local media secured access to the document. VIK EOOD - Gabrovo, in their capacity of a future
operator, have published the notification on their web site.
A national public hearing on the project, including the Environmental Assessment aspects, attended by
media and NGOs took place on December 12, 2007 at the MRDPW. There have been no comments and
recommendations to the Environmental Due-Diligence Report that has been published on the web site of
MRDPW within the deadline stipulated by law.
The recommendations made during the consultations and hearings in 2007 have been reflected in the
EIAS.
Furthermore, after the preparation of the draft EIAS (February 2009) a national hearing on this EIAS for
Neykovtsi Dam was carried out on 02.02.2009 at MRDPW. The Minutes of the discussion is attached
herewith.
On the part of the representatives of the administrative authorities, the public and the NGOs the EIAS
received a positive evaluation and approval and support for the completion of Neykovtsi Dam.
The EIAS has been published on the web-site of the MRDPW within the deadline stipulated by law.
A public hearing on the EIAS for Neykovtsi Dam was also carried out locally on 13.02.2009 in the town
of Tryavna. The Minutes of the public discussion is attached herewith.
The public hearing in Tryavna has been announced in the media. The discussion was broadcast on the
local radio and TV. A written opinion has been submitted by GeoEkoClub Academika V. Tarnovo,
National movement Ecoglasnost- section V. Tarnovo, the Bulgarian Association of social workers –
section V. Tarnovo. All three NGOs provide active support for protection of the environment and the
waters of the Yantra basin. The opinion contains a positive assessment of the EIAS for Neykovtsi
dam.All present at the public hearing gave were positive about the EIA and support the construction of
Neykovtsi Dam.
A meeting was held between the mayor of Tryavna Municipality – Mr. Nikolov, who gave his approval
for the EIA and supported the completion of Neykovtsi Dam.
As a result of the status evaluation and the envisaged insignificant environmental impact during the
construction completion phase and future operation of Neykovtsi Dam, in view of the social significance
and improvement of the health and sanitary conditions in the municipality of Tryavna, the completion of
Neykovtsi Dam is considered to be imperative.
NEYKOVTSI_en_F.doc
59/63
Annex 1
BULGARIA
MINISTRY OF REGIONAL DEVELOPMENT AND PUBLIC WORKS
MUNICIPAL INFRASTRUCTURE DEVELOPMENT PROJECT
TERMS OF REFERENCE FOR
ENVIRONMENTAL IMPACT ASSESSMENT FOR DAMS’ CONSTRUCTION COMPLETION
I.
BACKGROUND
1.
The Government of Bulgaria (GOB) has requested the assistance of the World Bank (the Bank) in
financing activities under the Municipal Infrastructure Development Project (MIDP) that will help the
country meeting the EU directives on water and wastewater environmental protection, which are eligible
for EU Structural Funds and not covered by other EU grants. The overall Project objective aims to
improve the provision of water supply through sub-projects that will: (i) complete three water supply
dams (Neikovtsi dam, Plovdivsti dam, and Luda Yana dam) where construction has ceased in the last
decade, and rehabilitate a dam wall of an existing functioning dam (Studena dam); (ii) rehabilitate the
water supply network in six water companies (Dobrich; Razgrad; Sliven; Smolyan; Stara Zagora; and
Targovishte); and (iii) prepare projects that would be eligible to receive EU Structural Funds for water
and wastewater investments needs. The above objective is fully in line with Bulgaria‘s National Strategy
on Environment (2005-2014) which intends to ―provide good quality and sufficient quantity of water for
various purposes‖.
2.
The overall proposed Project is considered Environmental Due-Diligance Report (EDDR)
category A as per Bank policies. The Bank's safeguard policies and procedures triggered for the proposed
project include: OP/BP 4.01 Environmental Assessment; OP/BP 4.12 Involuntary Resettlement; OP/BP
4.37 Safety of Dams; and OP/BP 7.50 Projects on International Waterways. Furthermore, adequate
protection and maintenance of ecosystems downstream of the dams should be assessed during project
preparation to determine the relevance of the OP/BP 4.04 Natural Habitats and OP/BP 4.36 Forestry
safeguard policies. Also, given the possibility that proposed water companies might implement projects in
cities with historic districts, the OPN 11.03 Cultural Property safeguard policy might be triggered.
During the project preparation the GOB prepared the following documents (i) project Environmental
Framework (EF) for all proposed sub-projects; (ii) Environmental Due-Diligence Report (EDR) which
assess the environmental status of the sites and the potential environmental impacts associated with the
completion and operations of the proposed three water supply dam sites‘ investments; (iii) Environmental
Management Plans (EMPs) for the rehabilitation investments proposed at the Studena dam site as well as
those related to water distribution networks, that specify civil works contract clauses related to application
of technical standards and other environmental requirements related to the construction phase; (iv) project
Land Acquisition Policy Framework (PF); and (v) Notification of riparian countries under OP 7.50
through Basin Commissions.
3.
The designated project EA category A requires the preparation by the GOB of a detailed
Environmental Impact Assessment (EIA) for the sub-projects related to investments for the completion of
three dams‘ construction and EMP for the wall rehabilitation works of Studena dam.
The draft Environmental Impact Assessment Reports (EIAR) will be discussed and disclosed by GOB in
a Public Consultation meeting that will take place before the start of the dam construction completion
works and will address the environmental and social impacts related to the proposed works and dam
operation as well as related mitigation and monitoring measures.
II.
TOR OBJECTIVES
4.
This TOR describes the assignment that the Consultant is expected to carry out in order to
facilitate proper project implementation. Specifically, the assignment relates to the completion works of
three water supply dams (Neikovtsi dam, Plovdivsti dam, and Luda Yana dam) and respective water
treatment plants (WTPs). The Consultant will prepare full Environmental Impact Assessment Reports
(EIAR) related to these three dam sites and respective WTPs in accordance with Bulgarian environmental
laws and regulations and the requirements of the Bank safeguard policies.
5.
The Ministry of Regional Development and Public Works (MRDPW) in collaboration with the
respective water companies will be the main counterparts of the Consultant during this assignment. The
MRDPW will ensure efficient coordination with relevant agencies, and particularly with the Regional
Water Companies (RWC), dam operators and local authorities. Detailed description for each ToR phase is
provided under section Scope of Consultant Work. The final ToR will include any comments and reviews
provided on this draft ToR by the public, stakeholders, affected communities, and appropriate regulatory
authorities.
III. SCOPE OF CONSULTANT WORK
The main task of the Consultant is to assist the GoB team (MRDPW) in conducting the Environmental
Impact Assessment (EIA) and preparing and disseminating the full EIA reports for the above three water
supply dams‘ construction completion works based on the final agreed ToR. For the tasks detailed below,
the Consultant will visit the project locations (the three dam sites) and will be in constant coordination
with appropriate local government authorities (Municipalities, Water, Environment, Agriculture, Public
Works institutions, dam operators), NGOs and/or research institutes for collecting necessary
environmental information relevant during dam construction phase as well as operation (e.g., noise; air,
water, and soil quality; traffic flow; land use and cultural heritage aspects, land ownership, etc.). During
the site visits particular attention should be paid to the local public (affected people) views on
environmental and social effects imposed during the future construction works. The Consultant shall
review all existing technical documents on environment, health and social benefits related to the proposed
dam construction investments.
The scope of work for this ToR includes the following main actions:
Task 1: Description of the Proposed Project. The Consultant shall provide a brief description of the
project purpose, background and scope, using maps or diagrams (at appropriate scale), and including the
following information: location; general layout; size and capacity (status of the existing dam construction,
dam and reservoir specifications, location of outlets, the area surrounding the reservoir, and downstream
areas, related WTP, etc.); pre-construction activities; construction activities; schedule staffing and
support; facilities and services; operation and maintenance activities; appropriate regulatory standards and
specifications which the Project will meet; required offsite investments and associated infrastructure (e.g.,
traffic patterns and access/road infrastructure); and life span of the dam and reservoir.
Task 2: Description of the Existing Environment. The Consultant shall assemble, evaluate and present
complete baseline data on the relevant environmental characteristics of the study area. The description
will reflect the dynamics of the current environmental components and will identify trends in the context
of predicted changes over time, where applicable. The information shall include:
a) Physical environment: geology; topography; watershed hydrology at the site of the dam and
reservoir and downstream areas, especially floodplain; soils; sediment quality, climate and
meteorology, ambient air quality and noise levels (near affected habitation); surface and ground
water resources including receiving water quality and hydrodynamics; existing sources of water
pollution discharges and air emissions; (e.g., current emission and effluent volumes and
characteristics, including any points of discharge from storm water and sewer treatment and
collection systems), and seismic activity.
b) Biological environment: flora and fauna; rare and/or endangered species (including species
migratory patterns); fish habitats, species at risks and sensitive habitats, including parks or
preserves, significant natural sites or protected areas (e.g. NATURA2000); species of commercial
importance; and species with potential to become nuisances, vectors or dangerous;
characterization of wetlands if applicable.
c) Socio-cultural environment: population, land use; planned development activities; community
structure; employment; distribution of income, goods and services; recreational activities (e.g.,
fishing operations); zoning restrictions; transportation and associated infrastructure, public health
and safety concerns; cultural heritage;,
A similar description of pre-dam construction conditions will be included where such information is
available.
Task 3: Applicable Legislative and Regulatory Framework. The Consultant shall describe briefly the
pertinent regulations and standards governing the Environmental Due-Diligance Report process
including environmental quality, health and safety, protection of sensitive areas and endangered species,
sitting, land use control at international, national, regional and local levels. Also, the consultant shall
describe the overall methodological approach to the EIA process including the technical approach (e.g.,
water or sediment core sampling, fish survey, any modeling exercise), establishment of boundaries, and
integration of cumulative environmental effects as well as the effects of environment on the project into
the EIA report.

Task 4: Impact Analysis. The Consultant shall predict and assess potential significant
environmental and social impacts and related risks. Based on the above review and site visits and
taking in consideration the preliminary findings of the Environmental Due Diligence (EDD)
Reports developed during project preparation (September 2007), the Consultant will develop a
list of potential impacts and risks during construction phase (temporary) as well as operation
(permanent) related to the proposed dam investments. Assessment of potential significant impacts
and risks shall include: (i) Positive and negative impacts at the local, regional and national levels;
(ii) Impacts on flora and fauna; (iii) Air pollution and noise impacts (particularly on sensitive
recipients such as hospitals, schools, residences located next to the investments); (iv) Impacts
related to drainage, soil erosion, pollution of watercourses if any, and safety; (v) Off-site impacts
(camp-sites for construction workers); (vi) Impacts on sensitive areas (natural habitats; sites of
historic, cultural and conservation importance), urban/rural settlements, agricultural areas; (vii)
Impacts on environmental flows to be maintained downstream. Predictions of positive and
negative environmental effects will consider all aspects of the proposed dam constructions, as
well as cumulative environmental effects, and those that may result from accidents or
malfunctions; (viii) irreversible or unavoidable impacts and impacts which can be mitigated;
.
The Consultant shall focus on the assessment of the following impacts:
a) Social and ecological effects of reservoir inundation (e.g., loss of agricultural, forestry and
grazing land, population resettlement, effects on wildlife and wild lands).
b) Effects on the hydrology and water and sediment quality of the river;
c) Effects on river fisheries and potential for creating a reservoir fisheries resource;
d) Effects on species at risk (fauna and flora) and migratory birds;
e) Impacts of altering river flow regimes downstream on the ecology of the floodplain, and the
economic activities/land use on the floodplain (agriculture, livestock production, etc.);
f) Impact of altering water supply and seasonality on urban, industrial, and rural users (e.g., effects
on groundwater and surface water resources);
g) Impacts on existing infrastructure (e.g., changes in quality of or access to infrastructure such as
water supply conduits, drainage works, landfills, bridges/roads, or other public infrastructure that
may be affected by dam construction);
h) Potential for increased incidence of water-borne and water-related diseases;
i)
Impact on terrestrial and aquatic wildlife, by creation of the reservoir, disruption of migration
routes, alteration of floodplain ecology, and population impacts;
j) Effect of dam construction on tourism and recreation activities as well as on labor and local
economy;
k) Effect of existing and predicted land use in the watershed on the functioning and longevity of the
dam and reservoir.
The assessment should also take into account how the existing environment could adversely affect
the proposed investments (e.g., seismic events, meteorological conditions and climate variability).
Task 5: Analysis of Alternatives to the Proposed Project. The Consultant shall:
 Describe the alternatives that were examined in the course of developing the proposed project and
identify other alternatives which would achieve the same objectives. The concept of alternatives
extends to sitting, design, technology selection, construction techniques and phasing, operation
and maintenance procedures, and other associated dam works (e.g., river diversion during
construction);
 Compare the alternatives in terms of potential environmental impacts; capital and operating costs
(including monitoring instrumentation); suitability under local conditions; overall dam safety
issues and emergency preparedness, plans for construction supervision and quality assurance (if
available), and institutional training and monitoring requirements;
 To the extent possible, quantify the costs and benefits of each alternative, incorporating the
estimated costs of any associated mitigating and monitoring measures, operation and maintenance
procedures, instrumentation and emergency preparedness plans, including the alternative of not
completing the projects..
Task 6: Development of Environmental Mitigation Plan. The Consultant shall:
 Recommend technically feasible and cost-effective measures to prevent or reduce significant
negative impacts to acceptable levels;
 Estimate the impacts and costs of those measures, and of the institutional and training
requirements to implement them;
 Include a brief description of contingency measures (including emergency response plans) that
have been proposed to address potential accidents and malfunctions that could result in spills or
unplanned releases of contaminants to the environment (such as oil or lubricants spills etc.);
Consider compensation mechanisms to affected parties for impacts which can not be mitigated
and can be used in the event of an unforeseen accidental event;
 Prepare an Environmental Mitigation Plan including proposed work programs, budget estimates,
and schedules, institutional responsibilities to implement the plan, emergency preparedness plan,
staffing and training requirements, and other necessary support services to implement the
mitigations measures.
Task 7: Development of Environmental Monitoring Plan The Consultant shall: (i) prepare a realistic
plan to monitor implementation of proposed mitigating measures and the impacts of the project during
construction and operation; (ii) estimate operating and maintenance costs and provide brief description of
other inputs (such as training and institutional strengthening) needed to be carried out.
Task 8: Assessment of Environmental Institutional Capacity to manage the EA process The
Consultant shall (i) Describe the national institutional responsibilities related to environmental
management; (ii) Review the authority and demonstrated capability of institutions at local, regional and
national levels and recommend steps to strengthen or expand their capacity; (iii) Recommend
management procedures and training, staffing, operation and maintenance training, budgeting and
financial support that will allow a proper implementation of the monitoring plan.
Task 9: Public Consultation Meetings. The Consultant will assist the MRDPW in carrying-out public
meetings with communities that are likely to be affected, other Governmental Agencies, NGOs and other
stakeholders to obtain their views on the Draft EIAR. Public meetings will be held at the 3 dam sites
where the draft ToR and the EIAR findings will be presented and feedback sought. The Public Meetings
should be announced locally in mass-media timely and active NGOs as well as local authorities should be
invited. Minutes including questions and answers from the public meetings will be included in the Final
EIAR, as well as the names of participating people.
IV.
REPORTS
The Consultant shall prepare separate EIAR for each of the three dams: Luda Yana, Neikovtsi and
Plovdivtsi. Annexes including updated maps of zone of the study, pictures taken during the site visit
and/or public consultation meeting information as well as any relevant information should be attached to
the final EIAR. Final and draft reports will be issued in English and Bulgarian.
The EIAR should include the following chapters:
 Executive Summary;
 Brief description of the legal and policy framework and institutional arrangements for
environmental management;
 Description of the proposed project (including map of project location);
 Baseline information (including socio-economic data);
 Significant Environmental Impacts (including cumulative effects);
 Analysis of alternatives;
 Environmental Mitigation Plan;
 Environmental Monitoring Plan (including monitoring evaluation and reporting system);
 Public Consultation procedures and Minutes of public meetings;
 Associated annexes (including information on any modeling and analysis performed).
V.
QUALIFICATION AND EXPERIENCE
The Consultant will have the following qualifications and experience:

Knowledge and experience in conducting EIA related to dam sites, review of infrastructure
projects, including economic and financial analyses;

Specific experience in hydrology (including modeling); terrestrial ecology (plant ecology,
forestry and wildlife); acquatic ecology and fisheries; watershed management; soil science and
geology (where relevant); public health, in particular water borne and water-related diseases;

Knowledge of current Bulgarian environmental legislation and procedures as well as Bank‘s
guidelines, EA procedures and operational policies;

Significant knowledge on public consultations for major infrastructure projects, in particular for
water and sanitation infrastructure;

Experience in participatory design and monitoring in at least one WB funded project is a plus;

Proficiency in English and in the use of computers, word processing, spreadsheets and other
basic software.
It is anticipated that the Consultant would establish a strong coordination with the Project
Implementation Team and the Project counterparts.
Appendix 1. The World Bank Operational Manual – the EMP format
Annex 2 – ACTION PLAN FOR ENVIRONMENTAL MANAGEMENT OF NEYKOVTSI DAM
Environmental
impact
3
Place and time of
performance
Implementation Funds
Person in Charge
Control functions
performed by:
4
5
6
7
Limit the affected land areas
within the construction site
boundaries.
Reducing the size of
the affected and
destroyed areas
Dam and PWPP
construction sites;
permanently
No additional funds are
required.
The Contractor
Use mobile water sprinkling
systems for dust suppression
on the temporary service
roads and routes crossing
settlements, the construction
sites and at the aggregate
material quarry;
The operation of building
machines and service
transport vehicles shall be
supported by regular
adjustment of the diesel and
gasoline units; observation of
the daily construction
schedules with a view to the
best utilization of the working
hours; minimization of the
„idle running‖ of machines.
Checks, on per shift basis, of
the condition of building
machines and transport
vehicles for spills and
leakages every shift; in the
event of accidents,
sequestration of the pollutants
Prevention and
reduction of pollution
with dust and
improvement of
conditions on working
sites
Dam, SQ, service
roads; in dry hot
weather
Included in the completion
costs
The Contractor
Restriction of spent
gases emissions and
respective pollution in
the working
environment
Dam, SQ, service
roads; permanently.
Included in the costs of
machine fleet maintenance
The Contractor
Non-admission of air
pollution with odours
and evaporations from
oil spills
Dam, SQ, service
Included in the costs of
roads, national road
machine fleet maintenance
network; permanently
Impact on:
Impact Mitigation Measure
1
2
During the Construction Phase
Atmospheric Air
The Contractor
Construction
supervisor, Tryavna
Municipality
environmental expert,
RIEW
Construction
supervisor, Tryavna
Municipality
environmental expert,
RIEW
Construction
supervisor
Construction
supervisor, RIEW,
Tryavna Municipality
environmental expert
Environmental
impact
3
Place and time of
performance
Implementation Funds
Person in Charge
Control functions
performed by:
4
Lake tail in the river
sector;
Dam construction
phase
5
Included in the cost of dam
completion, with a view to
inflow monitoring and
prevention of floods
6
7
The Contractor
Construction
supervisor, RIEW,
Danubian Region BD
- Pleven
Guaranteeing discharge Downstream of the
of environmental
dam; during the
waters for comparison construction phase
with the state of the
river ecosystem
To be included in the cost
upon update of the design;
minimal cost* - 10 000 leva
Impact on:
Impact Mitigation Measure
1
2
Construction of a water meter Provision of required
station in the dam lake tail for information on
metering of water inflow.
received water
quantities with view of
dam lake management
Water
Construction, in an
appropriate place downstream
of the environmental
discharge outlet, of a water
gauge station for monitoring
of the ecological discharge
quantity.
* Mount a control rack in measured profile
From the Design for sanitary Conservation of water
protection zones І, ІІ and ІІІ purity in Neykovtsi
around the water reservoir dam
benchmarking of zone І.
Sanitization of the reservoir
bed
Conservation of water
purity in Neykovtsi
dam
Secure delivery of ecological
discharge at 0,010 m3/s from
the intake tower level, and an
additional amount of 0.100
m3/s for 10 days/month in
March, April and May;
Erect permanent chemical
toilets during the construction
and operation phases
Securing the required
water quality for the
river ecosystem below
the dam
Conservation of water
purity in Neikovska
river
As per requirements
for zone I ;
Before the end of
construction
To be included in the cost
upon the design update
The Contractor
RIEW, Danubian
Region BD – Pleven,
RIPCPH
The Contractor
RIEW, Danubian
Region BD – Pleven
The whole lake basin; Included in the project cost.
The Contractor
Before
Include the additional workcommissioning
offshoot clearing and humus
stripping in the design update
– 350 000 leva
Intake tower level;
Included in the project cost.
The Contractor
During intake tower
erection works
RIPCPH, Danubian
Region BD – Pleven
At SQ, dam, PWPP
construction sites;
Before the start of
construction
RIEW, environmental
expert of Tryavna
Municipality
Funds acc. to the contract
with the firm performing the
maintenance
The Contractor
RIEW, Danubian
Region BD – Pleven,
environmental expert
of Tryavna
Municipality
Impact on:
Impact Mitigation Measure
1
2
Reassess the amount of
minimum permissible
discharge (ecological
releases) downstream of the
water intakes of the two
collecting diversions
Build a mechanical clarifier
below the ski-jump for
precipitation of construction
effluent before discharging it
in the r. Neikovska
Move and sanitize the
graveyard of the Kolyo
Ganev hamlet
Geological Base
Study the failure in the righthand bank (possibly in the
left as well) and take the
necessary steps to prevent
possible filtration through it
Perform sampling of the
diaphragm and the
embankment to get
deformation-strength
properties in view of
computing the dam wall
robustness
Environmental
impact
3
Place and time of
performance
Implementation Funds
4
5
Conservation of the full downstream of the
Provide for funds upon the
biological value of the four intakes of the
design update
river ecosystem
collecting diversions;
before commissioning
of the dam
Conservation of water
purity in Neikovska
river (increasing the
turbidity)
Conservation of water
purity in Neykovtsi
dam
downstream of the
ski-jump; in the
Minimal funds – 1 500 leva
course of building the
spillway, the chute
and ski-jump
Kolyo Ganev hamlet; Provide for funds upon the
in the course of WPS design update – 50 000 leva
construction
Assessment of filtration the right and left
Provide for funds upon the
with view of safety
banks; before the start design update – 100 000 leva
during operation
of construction
Person in Charge
Control functions
performed by:
6
7
The Contractor
Construction
Supervisor, RIEW
The Contractor
Construction
Supervisor, RIEW
The Contractor
Construction
Supervisor, RIEW,
RIPCPH, W&S Gabrovo
Geological engineer,
Designer, Contractor
Construction
Supervisor
Safety during operation
The diaphragm and
the embankment of
the dam wall.
Financing shall be included in
the project update – 150 000
leva
Engineer – geologist,
Designer, Contractor
Construction
supervision
Impact on:
Impact Mitigation Measure
1
2
In the event of accidental
spills and leakages from
mechanical or transport
equipment, perform
sequestration of the
pollutants.
Soils
Harmful physical
factors
Noise
Meet the waste management
requirements to prevent soil
pollution in the adjoining
areas
Remove the humus layer and
designate a site for humus
storage
Observe the restrictions for
PA Bulgarka without entering
the zone outside the site
outline
The heavy-duty vehicles
serving the dam construction
shall keep within the
permissible speed limit while
crossing the settlements, the
speed and routes being agreed
with the municipalities.
Construction activities shall
be performed mainly during
the daytime.
Environmental
impact
3
Place and time of
performance
4
Protection of soils from On the roads, SQ,
pollution with oils
dam and PWPP;
In the event of
accidents
Protection of soils from All over the
pollution with waste
construction area, at
temporary waste
collection & disposal
sites; permanently
Securing water purity From the reservoir
in the dam and humus bed before
for reclamation
commissioning
Conservation of the PA The water supply
system
Implementation Funds
5
6
Included in costs for
maintenance of the machines. The Contractor
The cost of emergency
sequestration will be
determined by the actual work
volume
Measures within the ―Waste‖ The Contractor
component
Included in the project cost
The Contractor
Included in the project cost
Protection of the health On the routes through
and comfort of the
settlements;
No funds required.
population
permanently
Non-disturbance of the On the construction
health factor in
site;
Neykovtsi residential
Permanently
area
The building equipment and Minimum noise impact On the construction
works shall be concentrated,
site;
as far as possible, at the main
Permanently
construction site.
Person in Charge
The Contractor
The Contractor
No funds required.
The Contractor
No funds required.
The Contractor
Control functions
performed by:
7
Construction
Supervisor
Construction
Supervisor, RIEW,
environmental expert
of Tryavna
Municipality
Construction
Supervisor, RIEW
Construction
Supervisor, RIEW
Environmental expert
of Tryavna
Municipality, the
Mayor
Construction
Supervisor, RIEW,
environmental expert
of Tryavna
Municipality
Construction
Supervisor
Impact on:
Impact Mitigation Measure
1
2
Investigate the condition of
the house near the dam before
the start of construction due
to risk of its collapse
The requirements of the
Waste Management Act
(items 7.24 to 7.36, Chapter
7) shall be met during the
construction and operation
phases
Blasting works at the quarry
near ligneous vegetation shall
be performed by a ―contained
blast‖ technology.
For biological reclamation of
areas affected by the
construction as envisaged in
the design, use species
appropriate for the climate
conditions of the region and
possessing the respective
―landscaping‖ properties
The blasting works, as far as
possible, shall not coincide
with the breeding period (end
of April - May);
Ensure release of the
ecological discharge from an
appropriate level of the Intake
Tower (not exceeding 10 m)
Upon ponding of the dam
lake, take the individual
tortoise specimens to
elevations above the water
level
Waste
Flora
Fauna
Environmental
impact
3
Clarification of the
actual state of the site
Place and time of
performance
4
The house, before
start of construction
Implementation Funds
Person in Charge
5
Minimal funds
6
The Contractor
Control functions
performed by:
7
Construction
Supervisor
Conservation of the
purity of atmospheric
air, water and soils.
Conservation of the
vegetation and wildlife,
and human health
Protect the vegetation
around the quarry from
damage
Collection, temporary Funds depending on waste
storage, transportation volume, landfills location and The Contractor
and disposal;
contracts with them
permanent
Construction
Supervisor
RIEW
On the SQ site;
during blasting
Included in the project cost
The Contractor
Construction
Supervisor
No import of foreign
and aggressive species
on the territory
designated for
reclamation
On construction sites
and areas subject to
reclamation, in the
end of construction
Provide for extra funds in the The Contractor
design update
Construction
Supervisor
RIEW
Protection of wildlife
during the breeding
period
At SQ;
End of April-May
Reflect in the construction
calendar plan for the period
end of April-May
The Contractor
Construction
Supervisor RIEW
Securing suitable water
quality under the dam
(t0) for fishes and other
water inhabitants
Conservation of
wildlife (protected
species)
Intake tower; during Included in the project costs
Intake Tower erection
works
The Contractor
Construction
Supervisor
In the lake basin
before ponding
Additional funds not required The Contractor
Construction
Supervisor, RIEW,
NGO
Impact on:
Impact Mitigation Measure
1
2
Strenghten the bridge in
Plachkovtsi
Environmental
impact
3
Safety in transport
Landscape
Health Factor
Implementation Funds
4
5
The bridge; before the Provide for additional funds
start of construction
in the design update – 100
000 leva
Person in Charge
6
The Contractor
In all areas affected
by the construction;
At the end of
construction
Provide for additional funds
in the design update
The Contractor
In the end of construction,
perform recultivation of the
affected lands outside the
facility;
Restoration of affected In all areas affected
areas outside the
by the construction;
facilities
In the end of
construction
Included in the project costs
The Contractor
The PWPP building and the
administrative building on the
dam wall crest shall be in an
appropriate architectural style
and color design.
In the end of construction,
repair the damaged sectors of
the national road network
Good visual impact of
sites
Provide for additional funds The Contractor
in the design update – 50 000
leva
Design and implement a
landscaping plan of the
territory;
Good incorporation of
site in the landscape
Place and time of
performance
Restoration of the good
condition of the
national road network
in order to provide for
traffic (in event of
registered damages
from construction)
Proper hygiene and living
Provision of a healthy
conditions, work clothes,
working environment
personal protection means,
and protection of the
and regimen of work and rest life of the construction
shall be ensured for the
workers
construction workers and
vehicle drivers.
Dam, PWPP; During
the construction
Control functions
performed by:
7
Construction
Supervisor, national
road infrastructure
Construction
Supervisor, RIEW,
environmental expert
of Tryavna
Municipality
Construction
Supervisor, RIEW,
environmental expert
of Tryavna
Municipality
Construction
Supervisor
National road
Funds shall be provided for in The Contractor
network; In the end of the dam wall design update –
construction
1 000 000 leva
Construction
Supervisor, national
road infrastructure
On dam and PWPP
construction sites,
SQ; permanently
Construction
Supervisor, RIPCPH
Included in the project costs
The Contractor
Place and time of
performance
Implementation Funds
Person in Charge
Control functions
performed by:
4
5
6
7
Observe the design for
Conservation of water
discharge of wastewater from purity in Drianovska
the PWPP after treatment
river
PWPP, permanently
Included in the project costs
By the Operating Team
The Owner, RIEW
Erect permanent chemical
toilets for the operation phase
or provide for wastewater
treatment
During operation, perform
regular visual inspections of
the lake water area for
possible development of
abrasion and landfall
processes
Conservation of water
purity in the dam and
Neykovska river
For dam and PWPP
operation staff;
permanently
Funds acc. to the contract
with the maintaining firm
By the Operating Team
The Owner, RIEW
Managing abrasion and
landfalls against
increase of deposits in
the lake
The lake area; by the
observation and
measurement
program
Included in the project costs
of observation and
measurement program
By the Operating Team
The Owner, RIEW,
Danubian Region BD
- Pleven
Implementation of the
The requirements of the
requirements of the Act
Waste Management Act shall concerning pollution of
be met
environmental
components and human
health endangerment
The PWPP operating staff
Securing healthy
shall be supplied with the
working conditions and
required means of protection, protection of the life of
inclusive for events of
the operational staff
accidents
Compliance with Regulation Safety during operation
13/2004, Operation
of the dam wall and its
Instructions and the Accident facilities during natural
Action Plan
disasters
Administrative
building of dam and
PWPP operation;
permanently
Funds depending on waste
By the Operating Team
volume, landfills location and
contracts with them
The Owner, RIEW
PWPP; permanently
Included in the operation
costs
By the Operating Team
The Owner, RIPQPH
On the dam and
PWPP site;
permanently
Included in the operation
costs
By the Operating Team
Owner, RIEW,
Danubian Region BD
– Pleven, Civil
Defense Dept. at
Ministry of
Emergency Situations
Impact on:
Impact Mitigation Measure
1
2
Environmental
impact
3
During the operation phase
Water
Soils
Waste
Health Factor
Dam Safety
Annex 3 – ENVIRONMENTAL MONITORING PLAN
Impact on
Which indicator is to be
monitored
Where shall the
indicator be monitored
How shall the indicator
be monitored (type,
monitoring equipment)
When shall the indicator
be monitored
(frequency/regularity of
measurements)
Financing needed
(cost)
Body responsible for the
monitoring
1
2
3
4
5
6
7
During construction works
Inspection Measurements
implemented by an
accredited laboratory
Regular checking, or
emergency control
following receipt of
signal
At the prices of
the accredited
laboratory for
emergency
control
Town of Plachkovtsi,
Neykovtsi estate,
village of Kyosevtsi,
village of Stoevtsi
Measurements
implemented by an
accredited laboratory
Regular checking, or
emergency control
following receipt of
signal
At the prices of
the accredited
laboratory for
emergency
control
Below the dam wall
and at the DWTP
Inspection and sample
taking
Standing In case of
incidents
At the prices of
the accredited
laboratory
At the place of
occurrence
Inspection
Standing
Dust, gas emission pollutions
due to construction and
transportation mechanical
equipment
At construction sites
and construction roads
Dust, gas emission pollutions
due to construction and
transportation mechanical
equipment
Water
Pollution of water in case of
non-compliance with the
envisaged measures
Soils
Occasional leakages and
emergency spills
Atmospheric air
Means for
deactivation acc.
to actual volumes
The Contractor,
Construction
supervision, RIEW,
RIHSC, environmental
expert of Tryavna
municipality
The Contractor,
Construction
supervision, RIEW,
RIHSC, environmental
expert of Tryavna
municipality
The Contractor,
Construction
supervision, RIEW,
RIHSC, environmental
expert of Tryavna
municipality, BD
Dunavski region
The Contractor,
Construction
supervision
Impact on
Which indicator is to be
monitored
Where shall the
indicator be monitored
How shall the indicator
be monitored (type,
monitoring equipment)
When shall the indicator
be monitored
(frequency/regularity of
measurements)
1
2
3
4
5
Noise
At construction sites
Control measurement
implemented by an
accredited laboratory
Regular checking
Noise
Town of Plachkovtsi,
Neykovtsi estate,
village of Kyosevtsi,
village of Stoevtsi
Control measurement
implemented by an
accredited laboratory
Regular checking, or
emergency control
following receipt of
signal
At the prices of
the accredited
laboratory for
emergency
control
At the sites specified in
the Waste Management
Plan
Inspection
Standing
No financing
needed
Bed of the lake
Inspection
Standing during
operation
No financing
needed
The estimated areas
affected by
construction
Inspection
Standing during
operation
No financing
needed
Rock quarry
Inspection
In the period late April May
No financing
needed
At construction sites
Inspection
Standing
No financing
needed
Collection, temporary storage,
transportation and discharge of
wastes
Final remediation of the lake
bed
Flora
Reclamation
Fauna
Detonation works
Health factor
Securing the required personal
protection kits to constriction
workers and machine operators
Atmospheric air Climate
6
At the prices of
the accredited
laboratory for
emergency
control
Noise
Wastes
Financing needed
(cost)
Climatic factors;
During the operation phase
Automated
By means of the installed
meteorological station
automated equipment for
close to the dam wall
measuring of
above the elevation of
temperature, humidity,
Standing, following a
developed plan
Included under
the project
Body responsible for the
monitoring
7
The Contractor,
Construction
supervision, RIEW,
environmental expert of
Tryavna municipality
The Contractor,
Construction
supervision, RIEW,
RIHSC, environmental
expert of Tryavna
municipality
The Contractor,
Construction
supervision, RIEW,
environmental expert of
Tryavna municipality
The Contractor,
Construction
supervision, RIEW
The Contractor,
Construction
supervision, RIEW, BD
Dunavski region –
Pleven
The Contractor,
Construction
supervision, RIEW
The Contractor,
Construction
supervision, RIHSC
Operation unit
Impact on
Which indicator is to be
monitored
1
2
How shall the indicator
be monitored (type,
monitoring equipment)
When shall the indicator
be monitored
(frequency/regularity of
measurements)
Financing needed
(cost)
Body responsible for the
monitoring
3
4
5
6
7
dam water level
wind direction and
speed, solar radiation,
quantity and intensity of
precipitation
Where shall the
indicator be monitored
Included in the
project cost.
Water inspection point
In compliance with the
plan for inspection and
monitoring
Release of minimum admissible
runoff from the water intake
tower (environmental water)
Measurement profile
In compliance with the
measurement
requirements
At regular intervals
Quality of water in the
dam lake and control on
occurrence of
eutrofication
Major chemical, bacteriological
and hydro-biological indicators
Water intake tower, at
the lake tail
Sample taking
In compliance with the
sample taking plan – at
10 days interval
At the prices of
the accredited
laboratory
Operation unit, RIHSC,
ViK Gabrovo, MOEW
(EEA) if covered by
National monitoring
Dam wall safety and
inspection of the water
area
Implementation of the
inspection and monitoring plan
At Central measuring
station along the bank
line
In compliance with the
recommendations of the
Monitoring and
measurement station
In compliance with the
plan for inspection and
monitoring
Included in the
project cost.
Operation unit
At input and output
points of DWTP
In compliance with the
Measurements Plan
Standing
Included in the
project cost.
Operation unit, RIHSC,
VIK Gabrovo
At the mud fields
In compliance with the
Monitoring Plan
At regular intervals
until their usability has
been established
Included in the
project cost.
Operation unit, RIEW,
RIHSC, VIK Gabrovo
Inflow to the dam
Continuous - three
times per day
Water
Quality of intake and
supply water to the
water supply system of
DWTP
Quality of sludge from
the mud fields of the
DWTP
In compliance with the
monitoring plan for of the
indicators
As per the indicators under the
Monitoring Plans
The minimum
cost shall be
included in the
project update
Operation unit
Operation unit
Annex 4 Methodologies and Sources Used in the Environment
Impact Assessment Statement
1.
2.
3.
4.
5.
6.
7.
8.
9.
10.
11.
12.
13.
14.
15.
16.
17.
18.
19.
National Strategy for Utilization of Water Resources and Protection of Waters in the Republic of
Bulgaria, 1995 – MOEW, leader R.Nikolaeva
Master plans of water use in the basin management regions in Bulgaria, Sofia, July 2000. –MOEW
– Institute on Water Issues – Bulgarian Academy of Sciences
Volume I. ―General background, methodological baseline and principles, general assessments and
major outcomes‖
Part VIII. Evaluation of water volumes for conservation of river ecosystems, team leader R.
Nikolaeva
7.4. Methodology for water evaluation for conservation of river systems
Volume IV. Dunavski region
3. General diagram for use of water in the Maritsa river basin
Methodology for balance computation of pollutants released in the atmosphere, 2000 –MOEW
Zarbova K. and team, Evaluation of certain environmental changes in case of disruptions in the
regime of the river runoff in the riverbeds of the Yantra and the Osum rivers, NVIC of KOPS, С.,
1989.
Zaharieva V., Mathematical models for establishing of flooding water quantity, Yearbook of the
University of Architecture, Construction and Geodesy, volume ХLI, section Hydroengineering
2003/04 С., 2004.
Euro-3 EU standards for emissions of harmful substances emitted by motor transports
Study of the geodynamic processes in the region of the G.Dimitrov dam evaluation of the
anthropogenic impact, 1984-1990.
Concept Note and Investigation Plan for Big Dams in Bulgaria, National conference
―Environmental Status of Bulgaria and future projections, Sofia, 1990, NACID No18, page 7 –
G.Gergov, А.Tsenkova, М.Tsenev
Investigation of the components of the mass-energy exchange within the surface air layer around
the ―Koprinka lake‖, A.S.Tzenkova-Bratoeva, J.N.Ivancheva, and B.Veleva; W.L.Smith and
Yu.M.Timofeev (Eds.), IRS 2000: Current Problems in Atmospheric Radiation. A.Deepak
Publishing, Hampton, Virginia, 2001, 1360-1366 pp.
Anna Tzenkova, Meteorogical investigation around the mountain reservoir. 24 th International
Conference on Alpine Meteorology (ICAM 1996), Bled, Slovenia, 9-13 September 1996
Pehlivanov L., Vassilev, M. 2003. Feeding of Age-1 Perch (Perca fluviatilis) with a View to the
Diurnal Dynamics of its Distribution in the Alexander Stamboliiski Resevoir, Bulgaria. – Acta
Zoologica Bulgarica, 55 (2): 81-90
Vassilev, M., L. Pehlivanov. 2005. Checklist of the Bulgarian Freshwater Fishes. – Acta zool.
Bulgarica, 57 (2): 161-190
Beshkov V. 1961 Contribution to the zoogeographic study of herpetofauna in Bulgaria – Institute
and museum of zoology Х 373-380
Beshkov V. 1972 Item III Examinations on ecology and distribution ХХХVІ 125-136
Beshkov V. 1985 Amphibian. Reptiles – В: Red Book of Bulgaria para.ІІ Animals 32-41
Casc J-P et all 1997 Atlas of Amphibians and Reptiles in Europe Paris Soc Europe Herpetol and
Mus.Nat.Hist Natur 95th authors of the various chapters, paragraphs, species reviews and
distribution maps in the Atlas for Bulgaria – Beshkov V.
Beshkov В., K.Nanev 2002 Amphibians and reptiles in Bulgaria, Pensoft сс 1-120
Petrov B., P.Stoev, V.Beshkov 2001 Review of composition and distribution of Amphibia and
Reptilia in the eastern Rhodopes
Beltcheva, M., R. Metcheva. 1996. Methods for estimation the food eaten, the place and functional
20.
21.
22.
23.
24.
25.
26.
27.
role of small mammals in ecosystems. ―National Parks and their role in biodiversity protection on
Balcan Peninsula.‖, Ohrid, 143-146
Metcheva, R., A. Artinian, E. Nikolova, M. Belcheva, R. Laleva. 1997. Estimation of
environmental quality using monitor species small mammals from two regions with different
antropogenic influence in Bulgaria. A. Bioaccumulation of toxic elements and their influence on
some hystological and hematological indices. Ecomonitoring in Rozhen Srednogorie - Bulgaria.
Theory and Practice-Ministry of Environment, SDC - Swiss Agency for Development and
Cooperation. Sofia,113 - 119
Mecheva, R., М. Topashka-Ancheva, M. Belcheva, Tsv. Yordanova 2004. Bioindicating capacity
of petty mammals in zoological monitoring - Lesovudska misal.1, v.10 (29):135 – 143
Chassovnikarova T., R. Metcheva, K.Dimitrov. 2005. Microtus guentheri (Danford & Alston)
(Rodentia, Mammalia): A Bioindicator Species for Eestimation of Polymetal Dust Emissions
Influence. Belgian Journal of Zoology 135 (2): 135-137
Environmental analysis Small HPP Apriltsi (catchment area of the Yantra River) – bird fauna
1999 . – team leader R.Nikolaeva
National plan for protection of bio diversity, 2000, MOEW.
WMO (1997)Technical Reports in Hydrology and Water Resource, No 56, Estimation of areal
evapotranspiration
Popov V., Sedevchev А. 2003. Mammals in Bulgaria. сс. 291
Popov V., Spasov N., Ivanova T., Mihova B., Georgiev К. 2007. Mammals important for
conservation in Bulgaria. Dutch Mammal Society Vzz. 328 с.
Annex 5 - Waste classification
Table 6
No
Type of waste
Code under
Ordinance No.
3 of 2004
1.
2.
3.
І.
1.
15.
16.
During construction
Waste from mining of non-metal ores and minerals
Waste from forestry – felling of tree vegetation (Scots pine culture) on a small
area and from completion of cleaning of the lake
Waste fine rubble/ ballast and rubble rock materials, different from those listed in
01.04.07
Waste sand and clay
Waste from liquid fuel – other fuels (including mixtures)
Spent engine oil from construction machinery
Paper and cardboard packaging
Plastic packaging
Packaging from wood materials
Metal packaging
Composite/ multi-layer packaging
Mixed packaging
Glass packaging
Packaging containing residues from hazardous substances or contaminated with
such
Concrete waste
Waste from tiles, plates, faience and ceramic materials
17.
Wood material used in construction
17.02.01
18.
Plastic used in construction
17.02.03
19.
17.03.01*
21.
22.
23.
Asphalt mixtures containing coal tar
Asphalt mixtures containing other substances different from those listed in
17.03.01*
Mixed metal waste
Cables different from those listed in code 17.04.10
Soil and stones different from those listed in code 17.05.03
24.
Excavated land masses different from those listed in code 17.05.05
17.05.06
25.
Insulation materials different from those listed in codes 17.06.01 and 17.06.03
17.06.04
26.
Construction plaster-based materials different from those listed in code 17.08.01*
17.08.02
27.
Mixed waste from construction and demolition different from those mentioned in
17.09.01, 17.09.02 and 17.09.03*
17.09.04
28.
Paint, ink, glue/ adhesives and resins containing hazardous substances
20.01.27*
29.
30.
31.
ІІ.
32.
Paint, ink, glue/ adhesives and resins different from those listed in code 20.01.27
Mixed domestic waste
Domestic waste not mentioned elsewhere
During operation
Mixed metal waste – from repair works
20.01.28
20.03.01
20.03.99
33.
Cables different from those listed in code 17.04.10 – from repair works
17.04.11
34.
Insulation materials different from those listed in codes 17.06.01 and 17.06.03 –
17.06.04
2.
3.
4.
5.
6.
7.
8.
9.
10.
11.
12.
13.
14.
20.
01.01.02
02.01.07
01.04.08
01.04.09
13.05.08*
13.08.99*
15.01.01
15.01.02
15.01.03
15.01.04
15.01.05
15.01.06
15.01.07
15.01.10*
17.01.01
17.01.03
17.03.02
17.04.07
17.04.11
17.05.04
17.04.07
No
1.
35.
36.
37.
38.
39.
40.
41.
42.
43.
44.
45.
46.
Type of waste
Code under
Ordinance No.
3 of 2004
2.
3.
from repair works
Solidified waste different from those mentioned in 19.03.06
Solid waste from initial filtration and from screens and racks
Sediments from water purification
Waste not mentioned elsewhere
Paper and cardboard
Fluorescent pipes and other waste containing mercury
Paint, inks, glue/ adhesives and resins containing hazardous substances from
repair works and maintenance
Paint, ink, glue/ adhesives and resins different from those listed in code 20.01.27*
from repair works and maintenance
Plastic
Metals
Mixed domestic waste
Domestic waste not mentioned elsewhere
19.03.07
19.09.01
19.09.02
19.09.09
20.01.01
20.01.21*
20.01.27*
20.01.28
20.01.39
20.01.40
20.03.01
20.03.99
Regulations
1.
2.
3.
4.
5.
6.
7.
8.
9.
10.
11.
12.
13.
14.
15.
16.
17.
18.
19.
20.
21.
22.
23.
24.
25.
26.
27.
28.
29.
30.
31.
32.
33.
34.
Environmental Protection Act (SG No.91/25.09.2002 – amended and supplemented as of 12/2009)
Water Act (SG No.67/01.09.1999 – amended and supplemented as of 70/2008)
Biological Diversity Act (SG No.77/09.08.2002 amended and supplemented as of No.94/2007)
Fisheries and Aquacultures Act (SG No.41/24.04.2001 amended and supplemented as of 108/2006)
Waste Management Act (SG No 86/2003 amended and supplemented as of 34/2006)
Ordinance on the terms and conditions for performance of EIA (SG3/10.01.2006 )
Forests Act (SG No.125/1997 – amended and supplemented as of No 6/2009)
Environmental Noise Protection Act (SG No.74/2005, amended and supplemented No 30/2006)
Act on the Ambient Air (SG No 45/1996…..No 6/2009);
Red Book of Bulgaria volume 2 – 1985
UN Convention on bio diversity conservation (in force in Bulgaria as of 16.07.1996 – SG No
19/1999
Order No RD-272/03.05.2001 for classification of surface waters in water sites or parts thereof –
MOEW.
Ordinance No 3, 01.04.2004 for wastes classification (SG No 44/25.05.2004).
Ordinance No 3, 01.04.2004 on the minimum requirements for healthy and safe labor conditions for
performance of construction and installation works (SG No 37/04.05.2004).
CoM Decision 122 of 02.03.2007 for acceptance of a list of protected areas for wild bird
conservation and list of protected areas for conservation of nature habitats of wild flora and fauna.
Law for regulation of water supply and sewerage services 2005.
Ordinance No 13/2004 on the terms and conditions for technical operation of dam walls and
accompanying facilities thereto – MOEW, MH, MRDPW.
Ordinance No 9/16.03.2001 of MH, MRDPW and MOEW on the quality of water for drinking and
household purposes.
Ordinance No 3/16.10.2000 of MOEW, MH and MRDPW on the terms and conditions for
investigation, design, approval and operation of sanitary protection zones around water reservoirs
and facilities for drinking water supply and around mineral water sources used for medicinal,
prophylactic, drinking and sanitation purposes.
Ordinance No 5/08.11.2000 of MOEW on the terms and conditions for creation and functioning of
the National system for water monitoring
Ordinance No 10/03.07.2001 of MOEW for issuance of permits for discharge of wastewater in
water bodies and determination of individual emission limits at point sources of pollution.
Ordinance No 6 on indicators of noise in the environment – MH, MOEW (SG No 58/2006).
Ordinance №7 on the hygienic requirements for health protection of residential environment;
Ordinance No 14/1995, amended and supplemented as of 2007 of MH and MOEW on ALV in air of
urban areas.
Ordinance No 26/01.10.1996 (amended and supplemented as of 2007) for remediation of impaired
areas, upgrading of low productivity lands and utilization of the humus layer.
Technical manual on hazardous substances – MOEW, 2003.
Standards for sizing of embankment dam walls 1986, BSA books 1 and 6
Design standards for hydrotechnical facilities. General principles 1985, BSA book.11/85
Standards for loading and impacts of hydrotechnical facilities due to waves, ice and vessels (1988)
Standards for design and construction of facilities in seismic regions (BSA No.1/1989)
Ordinance on the terms and conditions for evaluation of compatibility of plans and programs,
projects and investment proposals with the conservation objectives of protected areas (SG
No.73/2007)
Directive 92/43 of ЕЕС of the Council for conservation of nature habitats and wildlife
Directive 79/409 of ЕЕС of the Council for wild bird conservation
Protected Areas Act (SG No 133 of 1998, amendment and supplement as of 2007).
APPENDICES
Diagram “Water supply of Tryavna”
Topographic map with plotted Neikovtsi Dam 1:25 000
Forest map including Neykovtsi dam 1:10 000
Balgarka protected area map
Plachkovtzi
BALGARKA
PROTECTED AREA
Photos
A general bird‘s eye view of the dam and the overflow, with visible boundary of the new forest in
place of the forest cut in the process of clearing the lake basin bed
View of the upstream dam batter
View of the downstream dam batter
View of the intake tower
View of the diversion tunnel inlet
Monitoring measurement system
View of the grouting gallery
River of Neikovtsi in the low-water season
View of the construction site
View of the stone quarry
View of the town of Tryavna
View of the village of Plachkovtsi
List of Designs for Neikovtsi Dam
1.
Update of hydro-engineering explorations and water balance studies for Neikovtsi Water Supply
System performed by Vodocanalengineering SPLLC- 1990
2.
Preliminary EIAR on PWPP – Tryavna – 1999 – not reviewed
3.
Design data provided by Vodocanalproekt – Pure Water – Dipl.Eng. P. Surnev, 2007
5.
Water Quality Reports /Excerpt/
TRYAVNA MUNICIPALITY
www.obtriavna.org
www.tryavna.bg
5350 Tryavnba
21 Angel Kanchev Street
Tel/ 259 677 23 10
Fax/ 359 677 21 49
Email: [email protected]
Outgoing no. 04-00-85/ 31 August 2007
STATEMENT
From
Eng. STEFAN VLAZHEV DANAILOV
MAYOR OF TRYAVNA MUNICIPALITY
Regarding: Construction of Neokovtzi Dam
Financed by the Loan of the World Bank
The Municipality of Tryavna supports the construction of Neikovtzi dam due to its extraordinary
economic and social importance for provision of normal water supply of the town of Tryavna and the
populated areas in the Municipality.
For the construction works carried out to the moment there have never been any protests of
citizens or civil organizations including with regard to problems related to the protection of the
environment in the region.
Mayor of Tryavna Municipality
(Eng. St. Danailov )
Signed and sealed
Tryavna
August 31, 2007
MINISTRY OF ENVIRONMENT AND WATER
REGIONAL INSPECTORATE –VELIKO TARNOVO
5002 Veliko Tarnovo, 68, Nikola Gabrovski Street, fax: 623 734,
director: 062 620 351
PROTOCOL
Today, August 31, 2007 in the RIEW – Veliko Tarnovo, a meeting was held of the director of the
RIEW, eng. Elena Grigorova and the head of the department for Control of the Environment in the RIEW
– eng. Ginka Savcheva on one side and eng. Rozitza Nikolaeva – team leader of the team for the
environmental impact assessment of Neikovtzi dam, on the other side.
During the meeting, it was made clear that in the RIEW – Veliko Tarnovo, a procedure for the
EIA for the site of Neikovtzi dam, Tryavna Municipality has never been carried out due to the fact that
the construction works have started before 1991 when as per the Act for the Protection of the
Environment (SG, issue 86/1991) the requirement for the execution of the EIA was introduced.
Head of the Department for Control of the Environment:
(Eng. G. Savcheva)
Signed and sealed
Team Leader:
(Ass. Prof. Dr. Rositza Nikolaeva )
Signed and sealed
Director of the RIEW:
(Eng. E. Grigorova)
Signed and sealed
MINISTRY OF ENVIRONMENT AND WATER
REGIONAL INSPECTORATE –VELIKO TARNOVO
5002 Veliko Tarnovo, 68, Nikola Gabrovski Street, fax: 623 734,
director: 062 620 351
Outgoing no. 277/03 September, 2007
To: Ass. Prof. Eng. R. Nikolaeva
Sofia
Fax: 02/ 8656934
With regard to your oral request we would like to inform you that for the site of Water Treatment
Station for drinkable water to Neikovtzi dam, Tryavna Municipality, EIA has never been carried out
because the construction of the site has started before 1991, and after that, as per the Act for the
Protection of the Environment (SG, issue 86/1991) the requirement for the EIA was introduced.
After 1991 a procedure was carried out in RIEW – Veliko Tarnovo related to the EIA for the
following water treatment stations for the waste water in the Municipality of Tryavna:
1. Water treatment plant for the waste water of Deliev Khan quarter, Tryavna, EIA decision
110/27 September, 1995
2. Water treatment plant for the waste water of Tryavna town - EIA decision 13-07/1998.
GS/ GS
Sincerely,
Director
(Eng. El. Grigorova)
Signed and sealed
PROTOCOL
From a public discussion related to the Project for Development of the Municipal Infrastructure financed
by the International Bank for Reconstruction and Development
Today, February 13, 2009 at 2 p.m. in the building of the Municipality Administration of Tryavna a
public discussion was held about the Environmental Impact Assessment (EIA) for Neikovtzi dam.
The discussion was attended by:
1. Tatyana Doncheva – member of the Parliament from 7th MSR;
2. Nikolay Grigorov - member of the Parliament from 7th MSR;
3. eng. Dariya Sachkova – deputy regional governor of Gabrovo region;
4. Plamen Nikiforov – director of directorate for ViK in the MRDPW;
5. assistant professor Rositza Nikolaeva – team leader of the team that has prepared the project;
6. Orlin Dikov – representative of the IBRD for Bulgaria;
7. eng. Dragomir Nikolov, mayor of Tryavna Municipality;
8. eng. Georgi Chalakov – chairman of the Municipality Council of Tryavna;
9. Municipality councilors, representatives of the NGOs and citizens;
The meetings was opened by the Mayor of the Municipality eng. Dragomir Nikolov
Dear Mrs. Doncheva,
Dear Mr. Dikov,
Dear Mr. Nikiforov,
Dear Mrs. Nikolaeva,
Dear Fellow-citizens,
This is the local public discussion of the EIA for the completion of the construction of the hydro
connection ―Neikovtzi‖. On February 2, 2009 in the presence of the members of the Parliament, deputy
minister of the MRDPW, representatives of the International Bank for Reconstruction and Development,
representatives of the local authorities and representatives of the ecological organizations, a national
public discussion was held for the EIAs of the three dams – Neikovtzi, Luda Yana and Plovdivtzi. What
is good is that from ecological point of view there were no remarks. This is a site of extreme importance
for the Municipality of Tryavna because the problem with the water supply should be solved quickly and
is something that has been addressed on the meetings with the population on the spot during the
preparation of the project for the budget of the Municipality for 2009. For Tryavna, the construction of
the dam will solve the problem not only with the volume of the water but with its quality as well.
Considering that Tryavna is expanding its tourism activities and it is turning into a tourism centre and
considering the process that has already started related for the revival of the economy, the procedures for
the construction of the Naikovtzi dam should start within shortest possible time. As a result of the
assessments of the impact on environment and the forecasts of a insignificant extent of impact on the
environment at the completion of the construction and operation of the dam, considering the social
importance and the necessity of a normal and quality water supply in the Tryavna Municiaplity, I think
that the completion of Neikovtzi dam is a must. With these words I would like to open the discussions of
Neikovtzi dam and I am giving the floor to Mr. Plamen Nikiforov for the introductory words related to
the EIAs.
Mediator: Plamen Nikiforov
1. Plamen Nikiforov
Dear Mr. Mayor,
Dear representative of the National Assembly,
Dear citizens of Tryavna,
As per the requirements of the World Bank we should make such a public discussion on national and
on local level. These discussions are held after the availability of assessments. The results of the
discussions shall be submitted to the IBRD. Till the end of February, a negotiation package shall be
submitted and the Government shall sign an agreement for the construction. Until then, there is an
ongoing work on the procedures. I am giving the floor to ass. prof. Rozitza Nikolaeva – team leader
of the team that has prepared the project.
2. Ass. Prof. Rositza Nikolaeva – this is one of the dams that has gone through a considerable
investigation. Tryavna is developing and will continue to develop, there is future in the town and
this dam is necessary. The project has been updated constantly. Neikovtzi dam has been
constructed well, the water treatment plant is at a developed stage of construction. A commission
will follow up on the water situation.
The EIA has two aspects:
- real assessment of the condition of the environment
- what could happen in the future
30% of the construction has been completed. The spillway will be updated, the forest has been cut
down twice. The animal world has settled and found its way, the fish is in the river and does not reach the
wall of the dam. In brief, the biodiversity is scanty. There will be no bad consequences. The territory has
been excluded from the State Forestry Station of Plachkovtzi.
The only critical spot is Stoevtzi-Kasovtzi- Neikovtzi complex – there may be disturbances with
regard to transportation of materials.
It is part of the Balgarka National Park and in Natura 2000. The dam is necessary, the impact on the
environment is insignificant, measures have been taken for the solving of the problems and we can have
the conclusion that the completion of the construction of the dam is imperative.
Questions and opinions of the citizens and their answers
1. eng. Stefan Petrov – Mayor of Plachkovtzi complex
I have a few questions:
- stones for the dam shall be acquired from the stone-pit in Suhodol. Will there be some restoration
activities?
- Detonation activities are expected – the precipitations are expected in Kasovska river, and the water
of that river is used by the population
- what is the status of the conductive sewers
- will the river level drop
- this dam cannot be used by Plachkovtzi, sewerage shall be replaced
- the vehicles transporting materials shall pass through the town, the bridges shall not endure the
weight
- are there any calculations made with regard to the earthquake endurance
Reply from Plamen Nikiforov – Before I give the floor to Mrs. Nikolaeva I will reply to some of the
questions asked. With regard to the stone-pit in Suhodol: There is a project for the re-cultivation of
the stone-pit, there will be afforestation activities carried out and humus will be piled. Until now, for
5 years, the stone-pit was operating illegally. The further construction of the dam wall requires that
the open air stone-pit in Suhodol continues to be in operation. It is situated 5 km from the
Plachkovtzi town and a construction ground is shaped for the temporary construction. It is necessary
to be checked if there are enough resources for the fill of SP Suhodol as well as an assessment of the
geotechnical indicators of the material. As for the question related to the bridges and the streets in the
town there is a project for strengthening of the bridge. All building refuses shall be collected and kept
as per the Act for waste management. The construction works on the site shall be carried out under
the strict control of the investor on the activities related to the transportation and the making safe of
the building refuses. Mobile sprinkling systems shall be used for reduction of dust along the
temporary technological road traces through the populated areas, the construction sites and the stonepit. As for the problem with the water supply of Plachkovtzi town I can reply as follows: the water
collectors shall not affect the water supply of the town, water shall be collected in spring and during
the summer the water will stay in the river. I am giving the floor to ass. prof. Nikolaeva to answer the
rest of the questions.
Ass. Prof. Nikolaeva - The stone-pits are most difficult to restore. Afforestation plan shall be
prepared. For the re-cultivation there is a special project. The detonations shall be twice per month
and there shall not be much dust. In the measures there are 100 thousand BGN planned around for the
strengthening of the bridges and around 500 thousand BGN for the restoration of the road network.
The passing through the Neikovtzi and Plachkovtzi complexes shall be coordinated with the
constructor by you and the passing shall be carried out at the least conflict points and with low speed.
The roads shall be besprinkled in the dry season. The work of the construction engines and the
technologically related vehicle transport shall be accompanied by a periodical adjustment of the
diesel and the petrol aggregates, daily time construction schedules shall be observed in order to
facilitate the working process to a maximum and to reduce the floating of the equipment. As for the
pollution of the air mobile sprinkling devices for eliminating of dust shall be used for the temporary
technological roads and for the roads through the populated areas and the construction site and the
stone-pit. As for the danger of earthquakes - the danger in case of an earthquake is bigger now. The
entity responsible for the operation of the dam shall check immediately after an earthquake the
situation with the wall of the dam and will take the necessary measures. The calculations are made for
an earthquake of VIII degree of Fahrenheit. Until now we do not have a major accident with a dam
wall because the investigations done are very deep and serious. There is a plan for actions in
emergency situation.
Reply from Plamen Nikiforov – Dear Mr. Petrov, with regard to your question for the replacement
of the water supply network in the Plachkovtzi town I can reply as follow: This project does not
include construction of internal water supply network. This could be done by applying under other
programs.
Question: Dr. Emilia Cherkezova – I have a few questions:
1. what measures shall be taken against erosion
2. what scale measures the stability in case of earthquakes
3. who is going to finance the restoration of the territories
Reply from Plamen Nikiforov – The Fahrenheit scale is used for measuring the endurance. The most
unfavourable possibilities are considered. The consulting company shall update the afforestation project.
The funds for the restoration are included in the project. During the exploitation of the dam regular
examinations shall be carried out on the aqua territory of the lake for erosion and collapsing activities. In
case of accidental overflows due to the mechanization and the transportation vehicles measures shall be
taken against pollution of the soil and detoxication of the pollutants.
Reply from Ass. Prof. Nikolaeva – With regard to the question related to the restoration of the
territories of the project there are funds envisaged for the preparation of the afforestation plan. The bridge
in the Plachkovtzi town will be examined and restored. Landscape master plan shall be designed and
implemented on the territory. In the end of the construction period recultivation will be carried out on the
affected terrains outside the area of the works. In the end of the construction the affected section of the
national road network shall be restored.
Questions: Julian Marinov – expert in biodiversity of Balgarka National Park. Questions:
1. the functioning of the stone-pit – the production of opencast inert materials in protected areas is
forbidden
2. in the special plans there should be a conformity assessment
Reply from Plamen Nikiforov – I have just replied to the question about the functioning of the stone-pit.
I will add the following: The dam wall is calculated specifically for this material from this stone-pit. All
other options are necessitate calculations and expanded timeline. It will be assessed if the rest of the
material in the stone-pit shall be enough after the illegal exploitation carried out until now. As for the
conformity assessment in the master plans it is compulsory that we have such.
Question: Bozhidar Hristov – the water collectors of the dam shall be set up on one spot. Now in the
dry gully we do not have any water. If we do not collect the water from Grabchevo, we could not have a
dam. Is there a decision of the former regional municipality council for any designs related to racing paths
and is this going to be a problem now.
Reply from Ass. Prof. Nikolaeva The equalizer shall be filled with water during the spring season and
not at all during the shallow season.
Reply from Plamen Nikiforov – filling of the dam with water cannot be judged from transitory
observations, this is not an indicator.
Opinion: Todor Sharlandjiev – I fully support the project. Serious work is done by the state institutions
and this region is in serious need of water. I am sometimes astonished by the raised questions. Many
years ago there was a serious research carried out exploring the options for water supply of Tryavna.
Then this option was accepted. A lot of citizens of Tryavna support this project.
Reply from: Plamen Nikiforov – The financing is as follows: 80% are funds of the World Bank and
20% - from the state budget. The municipality does not participate.
Eng. Dragomir Nikolov
Dear Ladies and Gentlemen:
Within the course of the discussions a lot of questions were raised related to the safety during the
exploitation of the dam, the pollution of soil and water and you got detailed answers from ass. prof.
Nikolaeva and Mr. Nikiforov. The conclusion to be made is that the public supports the construction of
Neikovtzi dam due to the fact that the necessity of normal water supply is huge especially in Tryavna.
During the summer shallow water levels the municipality is experiencing water regime and during the
spring and autumn season the water is with bad quality. The town develops rapidly in terms of tourism
and recreation activities and in terms of economics and construction and that is impossible without
provision of the necessary quantities of water.
I am closing now the discussion related to the EIA of Neikovtzi dam.
The public discussion finished at 3:15 p.m.
Mediator of the meeting:
Plamen Nikiforov
Protocol was prepared by:
(Vanya Stoyanova)
Signed and sealed
To: the Ministry of the Regional Development and Public Works
International Bank for Reconstruction and Development
Sofia, Bulgaria
STATEMENT
From the non-governmental organizations working actively for the protection of the environment
and water in the basin of Yantra River
Regarding: The project for the development of the municipal infrastructure, financed by the International
Bank for Reconstruction and Development
Subject: EIA for Neikovtzi dam
The construction of the Neikovtzi dam as socially important hydro-technological facility for the
citizens of Tryavna Municipality and the region will not affect the ecological balance and its small area is
not a prerequisite for negative impacts on the biological diversity of European and national significance
and the environment in the valley of Neikovska river. It is not related to destroying and over consumption
of resources and does not represent hazardous antropogenic stress that could lead to destroying of the
landscape and the natural habitats in the protected territory of the national park Balgarka and the
protected area Balgarka of the National Ecological Network Natura 2000 with code BG 0000399.
With the present statement we would like to express the support of the non-governmental
organizations we are representing for the completion and the start of exploitation of Neikovtzi dam due to
the need of provision of sufficient quantities of quality drinkable water for the local population and the
guests of the Municipality and the region. We agree with the conclusions of the experts that have
prepared the Report for the Environmental Impact Assessment with regard to the completion of the
construction of Neikovtzi dam with water treatment plant and with the proposed plans for preventing
from ecological impacts and ecological monitoring.
For the GeoEcoCluc Akademika – Veliko Tarnovo
Kamelia Dzhanabetska
Secretary
Signed and sealed
For the National Movement Ekoglasnost
Veliko Tarnovo section
Nina Geogieva
Deputy Chairman
Signed and sealed
For the Bulgarian Association of the Social Workers
Veliko Tarnovo Branch
Petar Hristov
Chairman
Signed and sealed
Water Supply and Sewerage Ltd. - Gabrovo
Protocol
No. 22/28/14.06.2006
Surface Water Monitoring, as per Regulation 12/18.06.2002
Water Source - the Bulgarka River
Sample taken at: Bulgarka Open Catchment, Tryavna district
Date and time: 11:00; 14.06.2006
Weather conditions: after rain, melting snow, dry weather, etc.
A1 Category
Monitoring indicator as per
No.
Regulation 12
1 Active reaction
2
3
Color after simple filtration
T
o
o
Electric conductivity 20
5
6
7
8
Odor/dilution factor at 25
Nitrates
Nitrites **
Fluorides
Extractable organic chlorine
/2007/
Dissolved iron **
Manganese **
Copper
Zinc
Boron
Beryllium
Cobalt
Nickel
Vanadium
Arsenic
Cadmium
Chromium - total
Lead
Selenium
Mercury
Barium
Cyanides
Sulphates
Chlorides
Surface active substances
30 Phosphates /P2O5/ **
0
R
0
Result
7.90
Recommended Mandatory
6,5 - 8,5
13
10
20*
T
/
22
25*
µS/cm
magnitude as
per OIRS
(Odor
Intensity
Referencing
Scale)
mg/l
mg/l
mg/l
160
0
4.9
0.01
0.14
mg/l
mg/l
mg/l
mg/l
mg/l
mg/l
mg/l
mg/l
mg/l
mg/l
mg/l
mg/l
mg/l
mg/l
mg/l
mg/l
mg/l
mg/l
mg/l
mg/l
mg/l
/
0.044
0.022
0.02
0.086
<0,05
/
/
0.02
/
0.004
<0,025
0.002
0.014
/
/
/
0.004
5
<2,5
<0,05
mg/l
0.031
0
4
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
Unit of
measurement
pH
1000
3
25
50*
0,7 - 1,0
1.5
0.1
0.05
0.02
0.5
1
0.0002
0.02
0.02
0.01
0.01
0.001
0.3
0.05
3
0.05
0.005
0.05
0.05
0.01
0.001
0.1
0.05
250
0.0005
150
200
0.2
0.4
31 Phenols
mg/l
0.001
0.001
Dissolved or emulsified
hydrocarbons /following
32 extraction with petroleum ether/
mg/l
/
0.05
Polycyclic aromatic hydrocarbons
33 /2007/
34 Pesticides total
mg/l
mg/l
/
/
0.0002
0.001
35 COD **
36 Dissolved oxygen % saturation **
mgO2/l
%
8.5
8,6 mg/l
37 BOD5 at 20o without nitrification **
mgO2/l
/
<3
Nitrogen, as per Kjeldahl /nitrate38 free/
39 Ammonia ion
mg/l
mg/l
/
0.031
1
0.05
Substances extracted with
40 chloroform /2007/
41 Total organic carbon /2007/
mg/l
mg/l
/
/
Residual organic carbon following
flocculation and membrane
42 filtration /2007/
mg/l
/
/100 ml
/100 ml
/100 ml
9
7
2
mg/l
mgeqv/l
mg/l
mg/l
mg/l
91
1.55
7.8
18
<0,02
43
44
45
46
47
48
49
50
51
o
Coliforms 37 **
Fecal coliforms
Fecal streptococci
Salmonella
Total dry residue
Total hardness
Magnesium
Calcium
Aluminium
30
>70
1
0.1
50
20
20
Not to be detected in 5000 ml
* At unusual weather conditions or specific geographic circumstances, as per Art. 9, para. 1, p. 2
** See Art. 9, para. 1, p. 4.
Test ran by:
1. Margarita Shtereva ……….
2. Bonka Angelova ……….
Head of Central Laboratory for Chemical and Bacteriological Tests: Dipl. Eng. Ev. Kosseva
Manager: Dipl. Eng. Ivan Mishev
Water Supply and Sewerage Ltd. - Gabrovo
Protocol
No. 23/29/14.06.2006
Surface Water Monitoring, as per Regulation 12/18.06.2002
Water Source - the Grubchevo 1
Sample taken at: Grubchevo 1 Open Catchment, Tryavna district
Date and time: 12:15; 14.06.2006
Weather conditions: after rain, melting snow, dry weather, etc.
A1 Category
Monitoring indicator as per
No.
Regulation 12
1 Active reaction
2
3
Color after simple filtration
T
o
o
Electric conductivity 20
5
6
7
8
Odor/dilution factor at 250
Nitrates
Nitrites **
Fluorides
Extractable organic chlorine
/2007/
Dissolved iron **
Manganese **
Copper
Zinc
Boron
Beryllium
Cobalt
Nickel
Vanadium
Arsenic
Cadmium
Chromium - total
Lead
Selenium
Mercury
Barium
Cyanides
Sulphates
Chlorides
Surface active substances
30 Phosphates /P2O5/ **
31 Phenols
0
R
Result
8.2
Recommended Mandatory
6,5 - 8,5
14
10
20*
T
/
22
25*
µS/cm
magnitude as
per OIRS
(Odor
Intensity
Referencing
Scale)
mg/l
mg/l
mg/l
470
0
3.1
0.01
0.09
mg/l
mg/l
mg/l
mg/l
mg/l
mg/l
mg/l
mg/l
mg/l
mg/l
mg/l
mg/l
mg/l
mg/l
mg/l
mg/l
mg/l
mg/l
mg/l
mg/l
mg/l
/
0.039
0.021
0.02
0.057
<0,05
/
/
0.023
/
0.004
<0,025
0.01
0.012
/
/
/
0.004
34
<2,5
<0,05
mg/l
mg/l
0.031
0.001
0
4
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
Unit of
measurement
pH
1000
3
25
50*
0,7 - 1,0
1.5
0.1
0.05
0.02
0.5
1
0.0002
0.02
0.02
0.01
0.01
0.001
0.3
0.05
3
0.05
0.005
0.05
0.05
0.01
0.001
0.1
0.05
250
0.0005
150
200
0.2
0.4
0.001
Dissolved or emulsified
hydrocarbons /following
32 extraction with petroleum ether/
mg/l
/
0.05
Polycyclic aromatic hydrocarbons
33 /2007/
34 Pesticides total
mg/l
mg/l
/
/
0.0002
0.001
35 COD **
36 Dissolved oxygen % saturation **
mgO2/l
%
4
9,4 mg/l
37 BOD5 at 20o without nitrification **
mgO2/l
/
<3
Nitrogen, as per Kjeldahl /nitrate38 free/
39 Ammonia ion
mg/l
mg/l
/
0.024
1
0.05
Substances extracted with
40 chloroform /2007/
41 Total organic carbon /2007/
mg/l
mg/l
/
/
Residual organic carbon following
flocculation and membrane
42 filtration /2007/
mg/l
/
/100 ml
/100 ml
/100 ml
6
6
2
mg/l
mgeqv/l
mg/l
mg/l
mg/l
273
5.1
25.2
60
<0,02
43
44
45
46
47
48
49
50
51
o
Coliforms 37 **
Fecal coliforms
Fecal streptococci
Salmonella
Total dry residue
Total hardness
Magnesium
Calcium
Aluminium
30
>70
1
0.1
50
20
20
Not to be detected in 5000 ml
* At unusual weather conditions or specific geographic circumstances, as per Art. 9, para. 1, p. 2
** See Art. 9, para. 1, p. 4.
Test ran by:
1. Margarita Shtereva ……….
2. Bonka Angelova ……….
Head of Central Laboratory for Chemical and Bacteriological Tests: Dipl. Eng. Ev. Kosseva
Manager: Dipl. Eng. Ivan Mishev
Water Supply and Sewerage Ltd. - Gabrovo
Protocol
No. 24/30/14.06.2006
Surface Water Monitoring, as per Regulation 12/18.06.2002
Water Source - the Grubchevo 2
Sample taken at: Grubchevo 2 Oopen Catchment, Tryavna district
Date and time: 12:30; 14.06.2006
Weather conditions: after rain, melting snow, dry weather, etc.
A1 Category
Monitoring indicator as per
No.
Regulation 12
1 Active reaction
2
3
Color after simple filtration
T
o
o
Electric conductivity 20
5
6
7
8
Odor/dilution factor at 250
Nitrates
Nitrites **
Fluorides
Extractable organic chlorine
/2007/
Dissolved iron **
Manganese **
Copper
Zinc
Boron
Beryllium
Cobalt
Nickel
Vanadium
Arsenic
Cadmium
Chromium - total
Lead
Selenium
Mercury
Barium
Cyanides
Sulphates
Chlorides
Surface active substances
30 Phosphates /P2O5/ **
31 Phenols
0
R
Result
8.1
Recommended Mandatory
6,5 - 8,5
15
10
20*
T
/
22
25*
µS/cm
magnitude as
per OIRS
(Odor
Intensity
Referencing
Scale)
mg/l
mg/l
mg/l
410
0
2.7
0.01
0.16
mg/l
mg/l
mg/l
mg/l
mg/l
mg/l
mg/l
mg/l
mg/l
mg/l
mg/l
mg/l
mg/l
mg/l
mg/l
mg/l
mg/l
mg/l
mg/l
mg/l
mg/l
/
0.053
<0,01
0.02
0.067
<0,05
/
/
0.023
/
0.004
<0,025
0.007
0.013
/
/
/
0.005
31
<2,5
<0,05
mg/l
mg/l
0.031
0.001
0
4
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
Unit of
measurement
pH
1000
3
25
50*
0,7 - 1,0
1.5
0.1
0.05
0.02
0.5
1
0.0002
0.02
0.02
0.01
0.01
0.001
0.3
0.05
3
0.05
0.005
0.05
0.05
0.01
0.001
0.1
0.05
250
0.0005
150
200
0.2
0.4
0.001
Dissolved or emulsified
hydrocarbons /following
32 extraction with petroleum ether/
mg/l
/
0.05
Polycyclic aromatic hydrocarbons
33 /2007/
34 Pesticides total
mg/l
mg/l
/
/
0.0002
0.001
35 COD **
36 Dissolved oxygen % saturation **
mgO2/l
%
5.7
8,7 mg/l
37 BOD5 at 20o without nitrification **
mgO2/l
/
<3
Nitrogen, as per Kjeldahl /nitrate38 free/
39 Ammonia ion
mg/l
mg/l
/
0.023
1
0.05
Substances extracted with
40 chloroform /2007/
41 Total organic carbon /2007/
mg/l
mg/l
/
/
Residual organic carbon following
flocculation and membrane
42 filtration /2007/
mg/l
/
/100 ml
/100 ml
/100 ml
>24
5
2
mg/l
mgeqv/l
mg/l
mg/l
mg/l
264
4.45
23.4
50
<0,02
43
44
45
46
47
48
49
50
51
o
Coliforms 37 **
Fecal coliforms
Fecal streptococci
Salmonella
Total dry residue
Total hardness
Magnesium
Calcium
Aluminium
30
>70
1
0.1
50
20
20
Not to be detected in 5000 ml
* At unusual weather conditions or specific geographic circumstances, as per Art. 9, para. 1, p. 2
** See Art. 9, para. 1, p. 4.
Test ran by:
1. Margarita Shtereva ……….
2. Bonka Angelova ……….
Head of Central Laboratory for Chemical and Bacteriological Tests: Dipl. Eng. Ev. Kosseva
Manager: Dipl. Eng. Ivan Mishev
Water Supply and Sewerage Ltd. - Gabrovo
Laboratory Testing Center - LTC
tel.: (066) 816-132
email: [email protected]
ФК 510-1
Sheet 1 out of 3
Test Protocol
No. 289 / 18.06.2008
1. Subject of test: Surface water for drinking and household purposes
2. Date and location of taking of sample, number of sample by type: 10.06.2008, the
Bulgarka River Open Catchment, # 294
3. Test requested by: Danube River Basin Directorate, order # 52 / 10.06.2008
4. Methods of testing:
Color
Odor
Turbidity
Temperature
Active reaction
Electric conductibility
Permanganate oxidizability
Ammonia ion
Nitrites
Nitrates
Iron total
Manganese
BSS 8451
BSS 8451
BSS EN ISO 7027
BSS 8451
BSS 3424
BSS EN 27888
BSS 3413
VLM* No. 05/2006
VLM No. 01/2006
VLM No. 02/2006
VLM No. 07/2006
VLM No. 08/2006
Sulphates
Fluorides
Cyanides
Aluminium
Boron
Copper
Chromium total
Zinc
Surface active substances
Phenols
COD
Dissolved oxygen
VLM No. 17/2007
VLM No. 16/2007
VLM No. 09/2007
VLM No. 18/2007
VLM No. 12/2007
VLM No. 10/2007
VLM No. 04/2006
VLM No. 11/2007
VLM No. 44/2007
VLM No. 21/2007
VLM No. 20/2007
BSS EN 25813
Total dry residue
Total hardness
Calcium
Magnesium
Chlorides
BSS 3546
VLM No. ISO 6059
BSS ISO 6058
BSS ISO 6059
VLM No. 14/2007
BOD5
Total nitrogen
Nitrogen as per Kjeldahl
o
Coliforms at 37
Escherichia coli
BSS EN 1899-2
VLM No. 22/2007
VLM No. 22/2007
BSS ISO 9308-1
BSS ISO 9308-1
Phosphates P2O5
VLM No. 03/2006
Enterococci
EN ISO 7899-2
5. Date of submission of samples to the lab: 10.06.2008.
6. Quantity of samples: 1 sample of 1.5 l for physical and chemical indicators; and 1 sample of
1.5 l for microbiological indicators.
7. Date of test: 10.06.2008 - 13.06.2008.
Head of LTC: Dipl. Eng. Ev. Kosseva
* VLM - Validated Laboratory (Testing) Method - translator's note
Protocol No. 289
Sheet 2 of 3
8. Test Results
Standards /validated
methods/
# of
sample
/from inout log/
Test results
(value, "not
detected")
No.
Name of indicator
Unit of
measurement
1
2
3
4
5
6
Color
Hz /Pt/Co
BSS 8451
294
15
2
Odor
magnitude as per
OIRS (Odor
Intensity
Referencing
Scale)
BSS 8451
294
acceptable
21 oC
3
4
5
6
Turbidity
Temperature
Active reaction
Electric conductibility
NTU
o
C
pH
µS/cm
BSS EN ISO 7027
BSS 8451
BSS 3424
BSS EN 27888
294
294
294
294
2.17
/
8.19
121
21 oC
21 oC
21 oC
21 oC
7
8
9
10
11
12
13
14
15
16
17
Permanganate oxidizability
Ammonia ion
Nitrites
Nitrates
Iron total
Manganese
Total dry residue
Total hardness
Calcium
Magnesium
Chlorides
mg O2/l
mg/l
mg/l
mg/l
mg/l
mg/l
mg/l
mgeqv/l
mg/l
mg/l
mg/l
BSS 3413
VLM No. 05/2006
VLM No. 01/2006
VLM No. 02/2006
VLM No. 07/2006
VLM No. 08/2006
BSS 3546
VLM No. ISO 6059
BSS ISO 6058
BSS ISO 6059
VLM No. 14/2007
294
294
294
294
294
294
294
294
294
294
294
3.64
<0,013
0.007
3.5
0.01
0.027
95
1.4
19.2
5.8
<2,5
1
Limit value - Limit value A1 Category A2 Category
Regulation 12/18.06.2002
7
10
22
6,5 - 8,5
50
22
5,5 - 9,0
0.05
1
25
0.1
0.05
50
1
0.1
200
200
Lab testing
conditions
8
o
21 C
21 oC
21 oC
21 oC
21 oC
21 oC
21 oC
21 oC
21 oC
21 oC
21 oC
o
21 C
18
19
20
21
22
23
24
25
26
27
28
Phosphates P2O5
Sulphates
Fluorides
Cyanides
Aluminium
Boron
Copper
Chromium total
Zinc
Surface active substances
Phenols
29
COD
30
Dissolved oxygen
31
32
33
34
35
36
BOD5
Total nitrogen
Nitrogen as per Kjeldahl
Coliforms at 37o
Escherichia coli
Enterococci
mg/l
mg/l
mg/l
mg/l
mg/l
mg/l
mg/l
mg/l
mg/l
mg/l
mg/l
VLM No. 03/2006
VLM No. 17/2007
VLM No. 16/2007
VLM No. 09/2007
VLM No. 18/2007
VLM No. 12/2007
VLM No. 10/2007
VLM No. 04/2006
VLM No. 11/2007
VLM No. 44/2007
VLM No. 21/2007
294
294
294
294
294
294
294
294
294
294
294
0.04
10
<0,10
<0,005
0.06
0.06
<0,05
<0,05
<0,05
<0,05
<0,002
mg O2/l
VLM No. 20/2007
294
9.9
% O2
BSS EN 25813
294
90.4
mg O2/l
mg/l
mg/l
/ 100 ml
/ 100 ml
/ 100 ml
BSS EN 1899-2
VLM No. 22/2007
VLM No. 22/2007
BSS ISO 9308-1
BSS ISO 9308-1
EN ISO 7899-2
294
294
294
294
294
294
1.6
1.5
0.7
16
40
44
0.4
150
0,7 - 1,0
0.05
0.7
150
0,7 - 1,7
0.05
1
0.02
0.05
0.5
0.2
0.001
1
0.05
0.05
1
0.2
0.001
21 oC
o
21 C
21 oC
o
21 C
o
21 C
21 oC
o
21 C
21 oC
o
21 C
o
21 C
o
21 C
30
21 oC
>70
>50
21 C
<3
<5
1
50
20
20
2
5000
2000
1000
21 oC
21 oC
21 oC
22 oC
22 oC
22 oC
Remark: Test results refer only to samples tested. No excerpts from the Test Protocol may be duplicated without the written authorization of testing lab.
Test ran by:
1. Margarita Shtereva ……….
2. Bonka Angelova ……….
Head of LTC: Dipl. Eng. Ev. Kosseva
o
Laboratory Testing Center - LTC
tel.: (066) 816-132
email: [email protected]
ФК 510-1
Sheet 1 out of 3
Test Protocol
No. 290 / 18.06.2008
1. Subject of test: Surface water for drinking and household purposes
2. Date and location of taking of sample, number of sample by type: 10.06.2008, the
Grubchevo 1 River Open Catchment, # 295
3. Test requested by: Danube River Basin Directorate, order # 52 / 10.06.2008
4. Methods of testing:
Color
Odor
Turbidity
Temperature
Active reaction
Electric conductibility
Permanganate oxidizability
Ammonia ion
Nitrites
Nitrates
Iron total
Manganese
BSS 8451
BSS 8451
BSS EN ISO 7027
BSS 8451
BSS 3424
BSS EN 27888
BSS 3413
VLM* No. 05/2006
VLM No. 01/2006
VLM No. 02/2006
VLM No. 07/2006
VLM No. 08/2006
Sulphates
Fluorides
Cyanides
Aluminium
Boron
Copper
Chromium total
Zinc
Surface active substances
Phenols
COD
Dissolved oxygen
VLM No. 17/2007
VLM No. 16/2007
VLM No. 09/2007
VLM No. 18/2007
VLM No. 12/2007
VLM No. 10/2007
VLM No. 04/2006
VLM No. 11/2007
VLM No. 44/2007
VLM No. 21/2007
VLM No. 20/2007
BSS EN 25813
Total dry residue
Total hardness
Calcium
Magnesium
Chlorides
BSS 3546
VLM No. ISO 6059
BSS ISO 6058
BSS ISO 6059
VLM No. 14/2007
BOD5
Total nitrogen
Nitrogen as per Kjeldahl
Coliforms at 37o
Escherichia coli
BSS EN 1899-2
VLM No. 22/2007
VLM No. 22/2007
BSS ISO 9308-1
BSS ISO 9308-1
Phosphates P2O5
VLM No. 03/2006
Enterococci
EN ISO 7899-2
5. Date of submission of samples to the lab: 10.06.2008.
6. Quantity of samples: 1 sample of 1.5 l for physical and chemical indicators; and 1 sample of
1.5 l for microbiological indicators.
7. Date of test: 10.06.2008 - 13.06.2008.
Head of LTC: Dipl. Eng. Ev. Kosseva
* VLM - Validated Laboratory (Testing) Method - translator's note
Protocol No. 290
Sheet 2 of 3
8. Test Results
Standards /validated
methods/
# of
sample
/from inout log/
Test results
(value, "not
detected")
No.
Name of indicator
Unit of
measurement
1
2
3
4
5
6
Hz /Pt/Co
BSS 8451
294
14
magnitude as
per OIRS (Odor
Intensity
Referencing
Scale)
NTU
o
C
pH
µS/cm
BSS 8451
BSS EN ISO 7027
BSS 8451
BSS 3424
BSS EN 27888
294
294
294
294
294
acceptable
0.78
/
8.31
370
mg O2/l
mg/l
mg/l
mg/l
mg/l
mg/l
mg/l
mgeqv/l
mg/l
mg/l
mg/l
BSS 3413
VLM No. 05/2006
VLM No. 01/2006
VLM No. 02/2006
VLM No. 07/2006
VLM No. 08/2006
BSS 3546
VLM No. ISO 6059
BSS ISO 6058
BSS ISO 6059
VLM No. 14/2007
294
294
294
294
294
294
294
294
294
294
294
3.35
0.024
<0,007
2.2
0.008
0.023
250
4.5
52.1
23.3
<2,5
mg/l
VLM No. 03/2006
294
<0,02
1
Color
2
3
4
5
6
Odor
Turbidity
Temperature
Active reaction
Electric conductibility
7
8
9
10
11
12
13
14
15
16
17
Permanganate oxidizability
Ammonia ion
Nitrites
Nitrates
Iron total
Manganese
Total dry residue
Total hardness
Calcium
Magnesium
Chlorides
18 Phosphates P2O5
Limit value Limit value
Lab
- A1
- A2
testing
Category
Category conditions
Regulation 12/18.06.2002
7
8
10
22
6,5 - 8,5
50
22
5,5 - 9,0
o
21 C
21 oC
21 oC
21 oC
o
21 C
21 oC
o
0.05
1
25
0.1
0.05
50
1
0.1
200
200
21 C
21 oC
21 oC
21 oC
21 oC
21 oC
21 oC
o
21 C
21 oC
21 oC
21 oC
0.4
0.7
21 C
o
19
20
21
22
23
24
25
26
27
28
Sulphates
Fluorides
Cyanides
Aluminium
Boron
Copper
Chromium total
Zinc
Surface active substances
Phenols
29 COD
30 Dissolved oxygen
31
32
33
34
35
36
BOD5
Total nitrogen
Nitrogen as per Kjeldahl
Coliforms at 37o
Escherichia coli
Enterococci
mg/l
mg/l
mg/l
mg/l
mg/l
mg/l
mg/l
mg/l
mg/l
mg/l
VLM No. 17/2007
VLM No. 16/2007
VLM No. 09/2007
VLM No. 18/2007
VLM No. 12/2007
VLM No. 10/2007
VLM No. 04/2006
VLM No. 11/2007
VLM No. 44/2007
VLM No. 21/2007
294
294
294
294
294
294
294
294
294
294
31
<0,10
<0,005
<0,05
<0,05
<0,05
<0,05
<0,05
<0,05
<0,002
mg O2/l
VLM No. 20/2007
294
6.5
% O2
BSS EN 25813
294
94.2
mg O2/l
mg/l
mg/l
/ 100 ml
/ 100 ml
/ 100 ml
BSS EN 1899-2
VLM No. 22/2007
VLM No. 22/2007
BSS ISO 9308-1
BSS ISO 9308-1
EN ISO 7899-2
294
294
294
294
294
294
1.1
0.9
0.4
30
20
27
o
150
0,7 - 1,0
0.05
150
0,7 - 1,7
0.05
1
0.02
0.05
0.5
0.2
0.001
1
0.05
0.05
1
0.2
0.001
21 C
21 oC
o
21 C
21 oC
o
21 C
o
21 C
21 oC
o
21 C
21 oC
o
21 C
30
21 C
>70
>50
21 oC
<3
<5
1
50
20
20
2
5000
2000
1000
21 C
o
21 C
21 oC
22 oC
22 oC
o
22 C
o
o
Remark: Test results refer only to samples tested. No excerpts from the Test Protocol may be duplicated without the written authorization of
testing lab.
Test ran by:
1. Margarita Shtereva ……….
2. Bonka Angelova ……….
Head of LTC: Dipl. Eng. Ev. Kosseva
Laboratory Testing Center - LTC
tel.: (066) 816-132
email: [email protected]
ФК 510-1
Sheet 1 out of 3
Test Protocol
No. 291 / 18.06.2008
1. Subject of test: Surface water for drinking and household purposes
2. Date and location of taking of sample, number of sample by type: 10.06.2008, the
Grubchevo 2 River Open Catchment, # 296
3. Test requested by: Danube River Basin Directorate, order # 52 / 10.06.2008
4. Methods of testing:
Color
Odor
Turbidity
Temperature
Active reaction
Electric conductibility
Permanganate oxidizability
Ammonia ion
Nitrites
Nitrates
Iron total
Manganese
BSS 8451
BSS 8451
BSS EN ISO 7027
BSS 8451
BSS 3424
BSS EN 27888
BSS 3413
VLM* No. 05/2006
VLM No. 01/2006
VLM No. 02/2006
VLM No. 07/2006
VLM No. 08/2006
Sulphates
Fluorides
Cyanides
Aluminium
Boron
Copper
Chromium total
Zinc
Surface active substances
Phenols
COD
Dissolved oxygen
VLM No. 17/2007
VLM No. 16/2007
VLM No. 09/2007
VLM No. 18/2007
VLM No. 12/2007
VLM No. 10/2007
VLM No. 04/2006
VLM No. 11/2007
VLM No. 44/2007
VLM No. 21/2007
VLM No. 20/2007
BSS EN 25813
Total dry residue
Total hardness
Calcium
Magnesium
Chlorides
BSS 3546
VLM No. ISO 6059
BSS ISO 6058
BSS ISO 6059
VLM No. 14/2007
BOD5
Total nitrogen
Nitrogen as per Kjeldahl
Coliforms at 37o
Escherichia coli
BSS EN 1899-2
VLM No. 22/2007
VLM No. 22/2007
BSS ISO 9308-1
BSS ISO 9308-1
Phosphates P2O5
VLM No. 03/2006
Enterococci
EN ISO 7899-2
5. Date of submission of samples to the lab: 10.06.2008.
6. Quantity of samples: 1 sample of 1.5 l for physical and chemical indicators; and 1 sample of
1.5 l for microbiological indicators.
7. Date of test: 10.06.2008 - 13.06.2008.
Head of LTC: Dipl. Eng. Ev. Kosseva
* VLM - Validated Laboratory (Testing) Method - translator's note
Protocol No. 291
Sheet 2 of 3
8. Test Results
Standards /validated
methods/
# of
sample
/from inout log/
Test results
(value, "not
detected")
No.
Name of indicator
Unit of
measurement
1
2
3
4
5
6
Hz /Pt/Co
BSS 8451
294
16
magnitude as
per OIRS (Odor
Intensity
Referencing
Scale)
NTU
o
C
pH
µS/cm
BSS 8451
BSS EN ISO 7027
BSS 8451
BSS 3424
BSS EN 27888
294
294
294
294
294
acceptable
0.53
/
8.5
401
mg O2/l
mg/l
mg/l
mg/l
mg/l
mg/l
mg/l
mgeqv/l
mg/l
mg/l
mg/l
BSS 3413
VLM No. 05/2006
VLM No. 01/2006
VLM No. 02/2006
VLM No. 07/2006
VLM No. 08/2006
BSS 3546
VLM No. ISO 6059
BSS ISO 6058
BSS ISO 6059
VLM No. 14/2007
294
294
294
294
294
294
294
294
294
294
294
2.91
0.015
<0,007
<2,2
0.006
0.021
288
5.1
56.1
27.2
<2,5
mg/l
VLM No. 03/2006
294
<0,02
1
Color
2
3
4
5
6
Odor
Turbidity
Temperature
Active reaction
Electric conductibility
7
8
9
10
11
12
13
14
15
16
17
Permanganate oxidizability
Ammonia ion
Nitrites
Nitrates
Iron total
Manganese
Total dry residue
Total hardness
Calcium
Magnesium
Chlorides
18 Phosphates P2O5
Limit value Limit value
Lab
- A1
- A2
testing
Category
Category conditions
Regulation 12/18.06.2002
7
8
10
22
6,5 - 8,5
50
22
5,5 - 9,0
o
21 C
21 oC
21 oC
21 oC
o
21 C
21 oC
o
0.05
1
25
0.1
0.05
50
1
0.1
200
200
21 C
21 oC
21 oC
21 oC
21 oC
21 oC
21 oC
o
21 C
21 oC
21 oC
21 oC
0.4
0.7
21 C
o
19
20
21
22
23
24
25
26
27
28
Sulphates
Fluorides
Cyanides
Aluminium
Boron
Copper
Chromium total
Zinc
Surface active substances
Phenols
29 COD
30 Dissolved oxygen
31
32
33
34
35
36
BOD5
Total nitrogen
Nitrogen as per Kjeldahl
Coliforms at 37o
Escherichia coli
Enterococci
mg/l
mg/l
mg/l
mg/l
mg/l
mg/l
mg/l
mg/l
mg/l
mg/l
VLM No. 17/2007
VLM No. 16/2007
VLM No. 09/2007
VLM No. 18/2007
VLM No. 12/2007
VLM No. 10/2007
VLM No. 04/2006
VLM No. 11/2007
VLM No. 44/2007
VLM No. 21/2007
294
294
294
294
294
294
294
294
294
294
37
<0,10
<0,005
0.06
<0,05
<0,05
<0,05
<0,05
<0,05
<0,002
mg O2/l
VLM No. 20/2007
294
7.2
% O2
BSS EN 25813
294
94.8
mg O2/l
mg/l
mg/l
/ 100 ml
/ 100 ml
/ 100 ml
BSS EN 1899-2
VLM No. 22/2007
VLM No. 22/2007
BSS ISO 9308-1
BSS ISO 9308-1
EN ISO 7899-2
294
294
294
294
294
294
1.2
0.6
0.1
40
26
30
o
150
0,7 - 1,0
0.05
150
0,7 - 1,7
0.05
1
0.02
0.05
0.5
0.2
0.001
1
0.05
0.05
1
0.2
0.001
21 C
21 oC
o
21 C
21 oC
o
21 C
o
21 C
21 oC
o
21 C
21 oC
o
21 C
30
21 C
>70
>50
21 oC
<3
<5
1
50
20
20
2
5000
2000
1000
21 C
o
21 C
21 oC
22 oC
22 oC
o
22 C
o
o
Remark: Test results refer only to samples tested. No excerpts from the Test Protocol may be duplicated without the written authorization of
testing lab.
Test ran by:
1. Margarita Shtereva ……….
2. Bonka Angelova ……….
Head of LTC: Dipl. Eng. Ev. Kosseva
Water Supply and Sewerage Ltd. - Gabrovo
Test Protocol
No. 344/09.07.2007
ФК 510-1
Surface Water Monitoring, as per Regulation 12/18.06.2002
Water source: the Bulgarka River
Sample taken at: Bulgarka River Catchment
Date and time: 02.07.2007, 12:50
Weather conditions: after rain, melting snow, dry weather, etc.
Monitoring indicator as per
No.
Regulation 12
1 Active reaction
2
3
Color
Turbidity
4
Unit of
measurement
pH
0
Result
8.10
A1 Category
Recommended
Mandatory
6,5 - 8,5
R
NTU
12
0.43
Electric conductivity 20o
µS/cm
155.3
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
Permanganate oxidizability
Nitrates **
Nitrites
Fluorides
Dissolved iron **
Manganese **
Copper
Zinc
Boron
Nickel
Arsenic
Cadmium
Chromium - total
Lead
Cyanides
Sulphates
Chlorides
Surface active substances
mg O2/l
mg/l
mg/l
mg/l
mg/l
mg/l
mg/l
mg/l
mg/l
mg/l
mg/l
mg/l
mg/l
mg/l
mg/l
mg/l
mg/l
mg/l
4.96
7.1
0.01
<0,10
20
21
<0,05
0.1
<0,05
<0,020
/
<0,002
<0,03
<0,010
<0,005
6
<2,5
<0,05
23
24
25
26
Phosphates / PO43Phenols
COD **
Dissolved oxygen - % saturation **
mg/l
mg/l
mg/l
%
0.074
/
18.3
54.1
0.4
0.001
30
>70
27
28
29
30
31
32
BOD5 at 20 without nitrification **
Nitrogen, as per Kjeldahl /nitrate-free/
Ammonia ion
Total organic carbon /2007/
Total dry residue
Total hardness
mgO2/l
mg/l
mg/l
mg/l
mg/l
mgeqv/l
2
0.57
<0,013
/
98
1.5
<3
1
mg/l
mg/l
mg/l
19
6.6
<0,05
/100 ml
30
o
33 Calcium
34 Magnesium
35 Aluminium
o
36 Coliforms 37 **
10
20*
1000
25
50*
0,7 - 1,0
0.1
0.3
0.05
0.05
0.5
3
1
0.02
0.01
0.001
0.05
0.005
0.05
0.05
0.05
150
250*
200
0.2
0.05
50
1
37 Fecal coliforms
38 Fecal streptococci
/100 ml
/100 ml
20
24
20
20
Test ran by:
1. Margarita Shtereva ……….
2. Bonka Angelova ……….
Head of Central Laboratory for Chemical and Bacteriological Tests: Dipl. Eng. Ev. Kosseva
Manager: Dipl. Eng. Ivan Mishev
Water Supply and Sewerage Ltd. - Gabrovo
Test Protocol
No. 345/09.07.2007
ФК 510-1
Surface Water Monitoring, as per Regulation 12/18.06.2002
Water source: the Dryanovska River
Sample taken at: Grubchevo 1 River Catchment
Date and time: 02.07.2007, 11:10
Weather conditions: after rain, melting snow, dry weather, etc.
Monitoring indicator as per
No.
Regulation 12
1 Active reaction
2
3
Color
Turbidity
4
Unit of
measurement
pH
0
Result
8.30
A1 Category
Recommended
Mandatory
6,5 - 8,5
R
NTU
7
0.32
Electric conductivity 20
µS/cm
431
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
Permanganate oxidizability
Nitrates **
Nitrites
Fluorides
Dissolved iron **
Manganese **
Copper
Zinc
Boron
Nickel
Arsenic
Cadmium
Chromium - total
Lead
Cyanides
Sulphates
Chlorides
Surface active substances
mg O2/l
mg/l
mg/l
mg/l
mg/l
mg/l
mg/l
mg/l
mg/l
mg/l
mg/l
mg/l
mg/l
mg/l
mg/l
mg/l
mg/l
mg/l
2.8
4
0.007
<0,10
17
21
<0,05
0.08
<0,05
<0,020
/
<0,002
<0,03
<0,010
<0,005
40
<2,5
<0,05
23
24
25
26
Phosphates / PO4
Phenols
COD **
Dissolved oxygen - % saturation **
3-
mg/l
mg/l
mg/l
%
<0,031
/
17.1
55.2
0.4
0.001
30
>70
27
28
29
30
31
32
BOD5 at 20o without nitrification **
Nitrogen, as per Kjeldahl /nitrate-free/
Ammonia ion
Total organic carbon /2007/
Total dry residue
Total hardness
mgO2/l
mg/l
mg/l
mg/l
mg/l
mgeqv/l
1
0.18
<0,013
19.4
275
4.7
<3
1
mg/l
mg/l
mg/l
46
28.8
<0,05
o
33 Calcium
34 Magnesium
35 Aluminium
10
20*
1000
25
50*
0,7 - 1,0
0.1
0.3
0.05
0.05
0.5
3
1
0.02
0.01
0.001
0.05
0.005
0.05
0.05
0.05
150
250*
200
0.2
0.05
1
o
36 Coliforms 37 **
37 Fecal coliforms
38 Fecal streptococci
/100 ml
/100 ml
/100 ml
54
11
28
50
20
20
Test ran by:
1. Margarita Shtereva ……….
2. Bonka Angelova ……….
Head of Central Laboratory for Chemical and Bacteriological Tests: Dipl. Eng. Ev. Kosseva
Manager: Dipl. Eng. Ivan Mishev
Water Supply and Sewerage Ltd. - Gabrovo
Test Protocol
No. 346/09.07.2007
ФК 510-1
Surface Water Monitoring, as per Regulation 12/18.06.2002
Water source: the Dryanovska River
Sample taken at: Grubchevo 2 River Catchment
Date and time: 02.07.2007, 11:10
Weather conditions: after rain, melting snow, dry weather, etc.
Monitoring indicator as per
No.
Regulation 12
1 Active reaction
2
3
Color
Turbidity
4
Unit of
measurement
pH
0
Result
8.20
A1 Category
Recommended
Mandatory
6,5 - 8,5
R
NTU
8
0.39
Electric conductivity 20
µS/cm
376
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
Permanganate oxidizability
Nitrates **
Nitrites
Fluorides
Dissolved iron **
Manganese **
Copper
Zinc
Boron
Nickel
Arsenic
Cadmium
Chromium - total
Lead
Cyanides
Sulphates
Chlorides
Surface active substances
mg O2/l
mg/l
mg/l
mg/l
mg/l
mg/l
mg/l
mg/l
mg/l
mg/l
mg/l
mg/l
mg/l
mg/l
mg/l
mg/l
mg/l
mg/l
2.56
3.5
0.013
0.16
28
21
<0,05
0.07
<0,05
<0,020
/
<0,002
<0,03
<0,010
<0,005
23
<2,5
<0,05
23
24
25
26
Phosphates / PO4
Phenols
COD **
Dissolved oxygen - % saturation **
3-
mg/l
mg/l
mg/l
%
<0,031
/
10.8
54.2
0.4
0.001
30
>70
27
28
29
30
31
32
BOD5 at 20o without nitrification **
Nitrogen, as per Kjeldahl /nitrate-free/
Ammonia ion
Total organic carbon /2007/
Total dry residue
Total hardness
mgO2/l
mg/l
mg/l
mg/l
mg/l
mgeqv/l
2
0.2
<0,013
18.6
240
4.1
<3
1
mg/l
mg/l
mg/l
46
21.6
<0,05
o
33 Calcium
34 Magnesium
35 Aluminium
10
20*
1000
25
50*
0,7 - 1,0
0.1
0.3
0.05
0.05
0.5
3
1
0.02
0.01
0.001
0.05
0.005
0.05
0.05
0.05
150
250*
200
0.2
0.05
1
o
36 Coliforms 37 **
37 Fecal coliforms
38 Fecal streptococci
/100 ml
/100 ml
/100 ml
29
158
>100
50
20
20
Test ran by:
1. Margarita Shtereva ……….
2. Bonka Angelova ……….
Head of Central Laboratory for Chemical and Bacteriological Tests: Dipl. Eng. Ev. Kosseva
Manager: Dipl. Eng. Ivan Mishev