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COOK ISLANDS GOVERNMENT
INFORMATION
DOCUMENT
Issued on
24 NOVEMBER 2014
Fo r
TE MATO VAI STAGE 2 – CONSTRUCTION AND OPERATION
Contact Entity:
TE MATO VAI PROJECT MANAGEMENT
UNIT, MINISTRY OF FINANCE and
ECONOMIC MANAGEMENT
Table of contents
1.
2.
3.
4.
General Information ....................................................................................................................... 1
1.1
Introduction .......................................................................................................................... 1
1.2
Purpose ................................................................................................................................ 1
1.3
Reliance on this Document and/or any information Contained in this Document ............... 1
Scope of Work ................................................................................................................................ 2
2.1
Locations and Project Drawings .......................................................................................... 2
1.1
Design and Build Works – Headworks ................................................................................ 2
1.2
Build Only Works – Operations, Roads and Pipelines ........................................................ 3
Design and Build Requirements .................................................................................................... 6
1.3
Concept Design ................................................................................................................... 6
3.1
Treatment Facility Performance ........................................................................................... 7
Other Information ........................................................................................................................... 9
4.1
Site Visit and Presentation ................................................................................................... 9
4.2
Tender timeline .................................................................................................................... 9
4.3
Local Contractor Involvement .............................................................................................. 9
Appendices
Appendix A - Drawings
Appendix B – Watercare Water Quality Report
Appendix C – Local Contractors
Te Mato Vai | Information Pack for Cook Islands Government - Te Mato Vai Stage 2 - Construction and Operation,
51/32561/00 | i
1.
General Information
1.1
Introduction
This document covers the general requirements for the construction and refurbishment of water
intakes, treatment, storage and water supply (to the ring main) for the Government of the Cook
Islands, through the Ministry of Finance, Economic Management (MFEM), Te Mato Vai PMU.
The Te Mato Vai project is generally made up of the following components:
1) The design and construction of the inner and outer ring mains (construction currently being
undertaken).
2) The design and construction of new water treatment facilities (currently part of this potential
tender).
3) The design and construction of replacement trunk mains as required (currently part of this
potential tender).
4) Upgrade of roading assets to improve all weather access to the water treatment facilities
(currently part of this potential tender).
5) The installation of domestic and commercial meters for the purposes of monitoring water
consumption (as part of a future tender).
6) The design and installation of a SCADA system (as part of a future tender).
1.2
Purpose
The purpose of this document is to provide some project specific design information to the
industry prior to the release of the tender document in order to assist the contracting industry to
prepare for the tender and understand the scope of work.
1.3
Reliance on this Document and/or Any Information
Contained in this Document
Information contained in this document is subject to change and no reliance can be placed on
the scope of the tender being the same as the information contained in this document.
Every attempt was made to ensure the accuracy of the information contained in this document
at the time of release however it should be noted that this may not be exactly reflected in the full
tender document put to the market.
Also, the issue of this document does not constitute a tender, or infer that any tender will
actually be released for this work at any point in the future.
Any costs incurred by any prospective contractor will be at that contractor’sthat contractor’s
risk, irrespective of whether any tender, in any form, is actually released at any point in the
future.
Report for Cook Islands Government - Te Mato Vai Stage 2 - Construction and Operation, 51/32561/00 | 1
2.
Scope of Work
2.1
Locations and Project Drawings
The contract works are located across eleven (11) sites in Rarotonga, Cook Islands:
The 11 sites are:
Site
Drawing Site Location Number
Avana
01
Avatiu
02
Matavera
03
Akaoa
04
Ngatoe
05
Papua
06
Taipara
08
Takuvaine
09
Tupapa
10
Turangi
11
Totokoitu
12
Preliminary site layout drawings and P&ID’s have been provided for information purposes
2.2
Design and Build Works – Headworks
For the purposes of this project, Headworks are defined as stream intakes, pre-treatment
facilities, treatment facilities and, where specified, any storage identified for each of the
locations. The headworks, and hence the scope of the design build, does not include the trunk
main pipeline works.
2.2.1
Design Works
It is intended that the headworks will be a design and build component, with the design works
incorporating the design, design report, drawings, documentation and Principal’s approval (on a
site by site basis) of all works required to be constructed for the headworks.
The activities to be completed under the design will be, but not necessarily limited to:
Production of all Design Documentation
Production of Process Documentation
Production of the Contractor Quality Plan
Approval of the design and relevant documentation by the Engineer
Other project requirements as necessary to satisfactorily complete the design of the
headworks
2.2.2
Headworks Construction
It is intended that the Headworks Construction is a ‘design and build’ component and shall incorporate all works required to complete the construction of detailed design as approved by
the Engineer. It includes the following sites:
2 | Report for Cook Islands Government - Te Mato Vai Stage 2 - Construction and Operation, 51/32561/00
Intake*
Site
Water Treatment Plant
Max Flow
Min Flow
3
3
(m /day)
(m /day)
N/A
N/A
Storage
3
(m )
Akaoa
N/A
1400
Avatiu
New
2000
450
4800
Avana
Upgrade
3400
1200
1400
Matavera
Upgrade
1200
325
600
Ngatoe
Upgrade
2000
250
2800
Papua
Upgrade
2000
1200
1400
Taipara
New
1200
250
N/A
Takuvaine
Upgrade
3000
675
600
Totokoitu
New
2000
400
N/A
Tupapa
Upgrade
1200
275
1400
Turangi
New
3000
1200
2800
*Note these are based on the concept design layouts and hydraulics, this can be altered depending on the design and
build recommendations.
The activities to be completed under the headworks construction will be, but not necessarily
limited to:
Production of the Contractors Construction Management Plan and Programme
Review and update of the Contractor Construction Management Plan and Programme
Completion of construction works to the satisfaction of the Engineer
Initial commissioning of the Headworks to the satisfaction of the Engineer
Production of As built documentation
Production of Operation and Maintenance manuals
Approval of Operation and Maintenance manuals by the Engineer
2.3
Build Only Works – Operations, Roads and Pipelines
2.3.1
Headworks Operational Period
Headworks Operation Period is a ‘build only’ component and shall require the contractor to complete all works required to prove the performance of the plant installed in the headworks
locations. It is likely that the contract will be required to operate the headworks components for
12 months.
The activities to be completed under this separable portion are, but not necessarily limited to:
Post commissioning of the plant to refine the production process
Supply and shipment of any coagulant required to operate the plant
Provision of water quality testing equipment for ICI(new SOE) operations staff
Water quality testing to prove the performance of the treatment process
Report for Cook Islands Government - Te Mato Vai Stage 2 - Construction and Operation, 51/32561/00 | 3
Training of TMV staff on the operation of the plant (both formal office based training and
on-site training)
Direction of TMV operation staff in the day to day operation of the water treatment
plants
2.3.2
Pipelines Construction
Pipelines Construction is a ‘build only‘ component and shall incorporate supply and construction
of the following pipelines. The work starts at the extent of the ‘design and build’ component works and ends at (and including) the connection to the ring main.
Pipe Material
Pipeline Length (m)
Akaoa
225 OD PE100 PN10
180
Avana
315 OD PE100 PN10
4174
Avatiu
355 OD PE100 PN10
2624
Matavera
200 uPVC
Repairs Only
Ngatoe
200 uPVC
Repairs Only
Papua
225 OD PE100 PN10
1503
Taipara
200 uPVC
Repairs Only
Takuvaine
200 uPVC
Repairs Only
Totokoitu
315 OD PE100 PN10
1695
Tupapa
200 uPVC
Repairs Only
Turangi
315 OD PE100 PN10
1864
Site
The activities to be completed the pipeline construction will be, but not necessarily limited to:
Review and update of the Contractor Construction Management Plan and Programme
Supply and installation of pipeline materials
Weld testing
Pipeline Pressure testing
Flushing and cleaning of pipeline
Supply and installation of pipeline fittings
Reinstatement of disturbed surfaces
Removal and disposal of existing pipeline materials where disturbed by the works
Production of as built documentation
Production of Operation and Maintenance manuals
Approval of Operation and Maintenance manuals by the Engineer
4 | Report for Cook Islands Government - Te Mato Vai Stage 2 - Construction and Operation, 51/32561/00
2.3.3
Access Road Construction
Access Roads Construction is a ‘build only‘ component and shall incorporate supply and construction of improvements to the access roads. Generally, road require improvements to the
surface drainage, pavement replenishment and construction of stream crossings. The work to
be undertaken is based on the following:
Existing Road Distance (m)
River Ford Crossings (No.)
Avana
4060
19
Akaoa
180
N/A
Ngatoe
1590
1
Taipara
1200
0
Matavera
1660
3
Tupapa
2020
2
Turangi
2220
0
Site
The activities to be completed under this separable portion are, but not necessarily limited to:
Review and update of the Contractor Construction Management Plan and Programme
Clearing of vegetation
Creation of road water table drains
Supply and construction of additional pavement
Construction of concrete river ford crossings
Report for Cook Islands Government - Te Mato Vai Stage 2 - Construction and Operation, 51/32561/00 | 5
3.
Design and Build Requirements
3.1
General Design Requirements
The design of the treatment facilities will be robust in terms of performance under varying
weather conditions and as such shall:
Use robust mechanical and hydraulic flow controls.
Eliminate, or minimise, the use of electricity (it is not available at most of the sites). All
Site must be reliably controlled.
Incorporate simple, low maintenance hydraulic chemical dosing systems (where
required).
Be of simple construction using long design life materials (i.e. concrete) where possible
for civil structures and when this is not possible metal structures shall be adequately
protected for coastal and tropical environments.
Have standardised treatment systems and equipment across all sites.
Allowance for access for ongoing operation and maintenance of equipment being
installed.
The footprint of the headworks to be kept to a minimum.
Equipment shall be located to minimise the extent and associated cost of new
infrastructure.
Headworks location to minimise the need for erosion protection due to the proximity to
the stream and the requirement for stream protection works.
Minimise lengths of watermain pipes and stream crossings.
Levels shown on Process Flow Diagram drawings are indicative only and may be
modified to meet the design requirements.
Where storage is proposed at a site, floor levels of the storage tanks proposed by the
contractor shall not be below the design floor level of the tank as shown in the concept
design. Deviations from these levels will need to be check during tender to prove no
detrimental impact to the operation of the supply system.
Where no storage is proposed at a site, the outlet from the filtration device proposed by
the contractor shall not be below the outlet level of the AVG shown in the concept
design. Deviations from these levels will need to be check during tender to prove no
detrimental impact to the operation of the supply system.
3.2
Concept Design
A concept design for an appropriate treatment process has been developed for proof of concept
purposes, based on the result of water quality investigations carried out at all intakes, site
constraints identified during the site investigations and a review of available technology.
The concept design is as follows:
Intakes upgraded to improve water capture and reduce occurrences of blockages
caused by debris in stream flows.
Settling tank with flow control arrangement at inlet to settlement tank, coagulant dosing
and settlement (possibly including further aeration).
6 | Report for Cook Islands Government - Te Mato Vai Stage 2 - Construction and Operation, 51/32561/00
No
Parameter
1
Sites
2
Detention time
Water Treatment
Plant Max Flow:
3
2900-3700 m /day
Water Treatment
Plant Max Flow:
3
1600- 2200 m /day
Water Treatment
Plant Max Flow:
3
1200-1400 m /day
Avana, Turangi,
Takuvaine
Avatiu, Ngatoe,
Papua, Totokoitu
Matavera, Taipara,
Tupapa
3.5 hrs
3.5 hrs
3.5 hrs
3
2
3
2
3
2
3
Loading rate
25 m / m / hr
25 m / m / hr
25 m / m / hr
4
Minimum
Length:width
4:1
4:1
4:1
5
No of tanks
2
2
1
2
64 m – 100 m
2
2
6
Surface area of
one tank
7
Length
15 - 19
16 - 18
12 - 14
8
Width
4-4
4-4
4-4
9
Depth
depth
end)
2.9
2.9
2.9
(minimum
at outlet
58 m – 72 m
1
2
40 m - 56 m
2
An Automatic Valveless Gravity (AVG) filter(s) directly fed by gravity from the outlet of
the settling tank.
No
Description
Rate
1
Filtration rate
Not to exceed 9 m / hr / m (2.5 l / s / m )
2
Backwash rate
Declining rate within range 7 mm / s – 18 mm / s
3
Backwash initiation
Automatic based on pressure loss with provision for
manual over-ride
4
Control
Hydraulic control module
3
2
2
Sediment collection, drainage, drying and collection for backwash and settling tank
scour.
Provision for connection of disinfection facilities if later required.
Storage tanks.
The concept design has been provided in good faith and the Contractor will be deemed to have
carried out further research and investigations as needed before either offering an optimised
design based on the concept design, or an alternative design.
3.3
Treatment Facility Performance
The objectives of the treatment facilities are those consistent with the Hydraulic Levels of
Service as set out in the ICI Technical Standards for Water Supply, May 2014, Section 3.0
Design Levels of Service which states the treatment system design will not include any
disinfection.
In terms of the Te Mato Vai Project the specific water quality objectives for treatment are to
generally meet WHO Guidelines for aesthetic determinands at all times with allowance for
unusual weather events as summarised in the table below.
Report for Cook Islands Government - Te Mato Vai Stage 2 - Construction and Operation, 51/32561/00 | 7
No
Determinand
Treated Water Requirements
1
Turbidity (NTU)
1 or < 1 NTU
2
Apparent colour (TCU)
5 or < 5 NTU
3
Total iron (mg/l)
< 0.1 mg/l
4
Manganese (mg/l)
< 0.1 mg/l
A water quality assessment and report has been completed and is included in Appendix B. This
information will be required to be expanded on by the contractor after award of contract.
8 | Report for Cook Islands Government - Te Mato Vai Stage 2 - Construction and Operation, 51/32561/00
4.
Other Information
4.1
Site Visit and Presentation
As part of the pretender information pack it is proposed to hold a Presentation and site visit day.
The details are as follows:
th
Date:
12 December 2014
Start time:
9am (CKT)
Meeting Venue:
CCECC Conference Room, Te Mato Vai Compound
Sites to be visited:
Matavera, Avana, Akaoa, Totokoitu
Prospective Tenderers shall notify their interest in attending the site visit to Latu Kupa
th
([email protected]) by 12noon 05 December 2014 (CKT).
Information to be supplied when notifying interest in attending the site visit is as follows:
-
Names of all people attending the presentation site visit
-
Names of delegated representative to attend the site visit
-
Name of company
There will be a maximum of 30 places available on the site visit component, as such and unless
attendance allows otherwise, it is only intended that representatives of companies intending to
tender for the entire project works will be selected to attend the site visit. Companies that are
looking to subcontract as part of the greater project are not intended to be catered for during the
site visit, however, they will be welcome to attend the presentation.
If necessary, and as available spaces dictate, it may be required to limit attendance at the site
visit to 1 or 2 people per prospective tenderer.
4.2
Tender Timeline
It is proposed that the tender timeline would be as follows:
Release of Tender document:
16/12/2014
Close of Tender:
06/02/2015
Tender Award:
27/02/2015
Start of construction:
20/03/2015
These are general timeline and should not necessarily be replied on. The Te Mato Vai project
reserve the right to change, alter or cease the tender process at any time.
4.3
Existing Site Investigation Information
Other information that has been collected during the design stage, and will be issued during the
tender phase is as follows:
1) Basic factual geotechnical report
2) Environmental Impact Assessment (EIA)
4.4
Local Contractor Involvement
A key component of selecting the preferred tender for this construction works will be the level of
involvement of local contractors (loosely defined as a company, or operation, that would be
Report for Cook Islands Government - Te Mato Vai Stage 2 - Construction and Operation, 51/32561/00 | 9
registered, or domiciled, in the Cook Islands, has a majority ownership by nationals of the Cook
Islands and generally, or wholly, employs people that permanently reside in the Cook Islands),
and can show a successful term track record of operating in the Cook Islands.
During the design process, local contractors were requested to submit their interest in providing
services to the project. Their names, contacts and general skill areas are contained in the table
below, and their actual registration forms are attached in Appendix C.
There is no representation that any information supplied in this document in relation to the skills,
or suitability, of these registered local contractors to complete any works associated with this
project can be relied upon. The list is not extensive and is not meant to provide a full list of
available local contractors. The list is also not exclusive, and any other local contractor not
registered on this list would be considered in the same context as the ones that are contained
on this list.
No screening has been undertaken on this list, and it is replied upon that the prospective
tenderers would satisfy themselves that any contractor listed here is in fact a local contractor.
4.5
Further Information
Further information on this project can be requested through contacting Latu Kupa
([email protected]). No individual correspondence will be entered into with any one prospective
tenderer, however, if deemed to be suitable at this point in the project process, further
information may be released to all prospective tenderers by way of the Cook Islands tender
website where this document has been sourced from.
www.tematovai.com; www.procurement.gov.ck; www.pwwa.ws; www.gets.govt.nz
10 | Report for Cook Islands Government - Te Mato Vai Stage 2 - Construction and Operation, 51/32561/00
AC Drainage
Limited
Riki Cowan
+682 23582
+682 58723
[email protected]
Baker Tree Services
Limited
Nooroa Baker
+682 22164
+682 55964
[email protected]
Chris Holford
Chris Holford
+682 28499
+682 71733
[email protected]
PO BOX
041
Muri
PO BOX
3277
Avarua
N/A
G & S Contractors
Robert Wichman
+692 26980
+682 26980
[email protected]
Landholdings
Limited
W.G. Doherty
+682 23415
+682 55103
[email protected]
Maoate
Contractors Limited
Paul Maoate
+682 31773
+682 54335
[email protected]
Master Builder
Vira Williams
+682 78365
[email protected]
Mike Rennie
Builders Limited
Mike Rennie
+682 20375
+682 55256
Pati's Landscaping
& Construction
Limited
Samuel Patiora
Heather
PTS The Plumbing
Shop
Ian Ibbetson
PO BOX
2033
Arorangi
PO BOX 94
Yes
General Civil /
Earthworks
Postal
Address
Construction
Email
Pipeline /
Meters
Contact
Number
Roading
Contact Person
Concrete
Company
Yes
Yes
Yes
Staff
3
5
Yes
Yes
PO BOX
132
Aitutaki
PO BOX
3290
Yes
[email protected]
PO BOX 32
Avarua
Yes
+682 21967
+682 54038
[email protected]
+682 22199
'+682 55199
[email protected]
PO BOX
3080
Avatiu
Rarotonga
PO BOX
154
Yes
Yes
Yes
1
Yes
Yes
Yes
Yes
7
Yes
Yes
Yes
Yes
52
Yes
11
Yes
Yes
Comments
Arborist
30
Yes
Yes
Yes
Yes
8
8
Report for Cook Islands Government - Te Mato Vai Stage 2 - Construction and Operation, 51/32561/00 | 11
Rarotonga Mining
Limited
Charlie Strickland
+682 55770
[email protected]
Rarotonga
Plumbings &
Drainage Limited
Rio Heather
Moana Bates
+682 25218
+682 55218
[email protected]
k
Rio Heather
+682 72849
+682 57027
[email protected]
RVK Contractors
Limited
Keta Williams
+682 55359
[email protected]
S & T Contractors
Limited
Henry Ariihe'e
+682 26699
+682 55929
[email protected]
PO BOX
362
Yes
T & M Heather
Limited
Joseph Heather
+682 24249
+682 55688
jojocontractorheather@gma
il.com
PO BOX
303
Avarua
Rarotonga
Yes
12 | Report for Cook Islands Government - Te Mato Vai Stage 2 - Construction and Operation, 51/32561/00
PO BOX
203
Avarua
PO BOX
845
PO BOX
2197
Arorangi
PO BOX
328
5
Yes
9
Yes
1
Yes
Yes
Yes
Yes
Yes
Yes
26
Yes
12
Yes
17
Aggregate
supplier
Appendices
Appendix A - Drawings
Drawings Content:
51-32561-01-G001 – Water Supply - Cover Page
51-32561-01-W002 – Avana – WTP Layout Plan
51-32561-01-W003 – Avana – Process Flow Diagram
51-32561-02-W002 – Avatiu – WTP Layout Plan
51-32561-02-W003 – Avatiu – Process Flow Diagram
51-32561-03-W002 – Matavera – WTP Layout Plan
51-32561-03-W003 – Matavera – Process Flow Diagram
51-32561-04-W002 – Akaoa – WTP Layout Plan
51-32561-04-W003 – Akaoa – Process Flow Diagram
51-32561-05-W002 – Ngatoe – WTP Layout Plan
51-32561-05-W003 – Ngatoe – Process Flow Diagram
51-32561-06-W002 – Papua – WTP Layout Plan
51-32561-06-W003 – Papua – Process Flow Diagram
51-32561-08-W002 – Taipara – WTP Layout Plan
51-32561-08-W003 – Taipara – Process Flow Diagram
51-32561-09-W002 – Takavaine – WTP Layout Plan
51-32561-09-W003 – Takuvaine – Process Flow Diagram
51-32561-10-W002 – Totokoitu – WTP Layout Plan
51-32561-10-W003 – Totokoitu – Process Flow Diagram
51-32561-11-W002 – Tupapa – WTP Layout Plan
51-32561-11-W003 – Tupapa – Process Flow Diagram
51-32561-12-W002 – Turangi – WTP Layout Plan
51-32561-12-W003 – Turangi – Process Flow Diagram
Appendix B – Watercare Water Quality Report
Water Quality Report
Please contact Latu Kupa for a copy of this report [email protected]
Appendix C – Local Contractors
Contractor Registration Sheets:
AC Drainage Ltd
Baker Tree Services Limited
Chris Holford
G&S Contractors
Land holdings Limited
Maoate Contractors Limited
Master Builder
Mike Rennie Builders Limited
Pati’s Landscape & Construction Limited
PTS The Plumbing Shop
Rarotonga Mining Limited
Rarotonga Plumbing & Drainage Limited
Rio Heather
RVK Contractors Limited
S&T Contractors Limited
T&M Heather Limited