PROJECT – KESUM-KAPCHEBIT COMMUNITY WATER PROJECT: PROPOSED
CONSTRUCTION OF INTAKE WEIR AND PIPE LAYING OF GRAVITY MAIN
Kesum-Chemunada community Gravity water project (Intake) is located in Embontangasir River which
emanates from Tembu forest in Koisungur of Marakwet West Sub County. The proposed intake site can
be accessed through Kapsowar-Cheptongei-Chebilbai-Koisungur Road. The Contractor is advised to visit
the site and familiarize himself with site conditions prior to bidding.
NO
ITEM DESCRIPTION
1.00
PRELIMINARY ITEMS
1.01
RIVER DIVERSION
The contractor must allow for construction of a
temporary river diversion to allow construction to take
place in a dry site.
UN
IT
QTY
L/s
Item
1.10
EXCAVATIONS
To include for all trimming to levels, back fillings with
approved selected spoils, compacting, disposal of surplus
materials and reinstatement.
1.11
Clear site from all undergrowth shrubs and trees,
including stubbing uproots and removal of all deleterious
materials from site
M2
50
Excavate river bank in a normal soil to take wing walls,
abutments, weir, riprap, key, aprons and cut off walls
1.5m deep
M3
40
1.13
Ditto for excavation in hard rock
M3
5
1.14
Backfilling with approved selected spoil compacted to
specification to both sides of the weir and wing wall
M3
25
CONCRETE WORKS
Sawn form work as described to sides of weir body and
wing walls
M2
40
Provide and place 100mm class B GI pipes for outlet
pipe, scour pipe and over flow
No
3
1.12
1.200
1.201
1.202
AMOUNT
1.203
concrete blinding under weir wing walls as
specified(1:3:6)
1.204
Mass concrete 1:2:4 in weir, wing walls, cutoff walls,
200mm thick
1.205
Provide and place to exposed faces of weir and wing walls
20mm thick mortar 1:3 plaster including water proof
cement
1.300
RIPRAP
1.301
200mm thick grouted riprap as specified upstream and
down stream
1.400
1.401
Weeping holes
Provide and place 63mmø UPVC pipe class C along the
bottom of the riprap upstream and down stream of the
weir facing the aprons
M3
2.0
M3
9
M2
32
M3
25
No
4
Kg
60
Kg
10
1.500
1.501
Reinforcement
High yield square trusted base to BS 4461 10mmø in head
walls, wing walls, weir body
1.502
Provide binding wire for item 1.3
Kg
5
1.503
1.600
1.601
Allow for nails for item 1.2
Sub -Total
Pipes and Fittings.
Provide, Handle and install 100mmø G.I Elbow.
No.
3
1.602
1.603
1.604
1.605
Ditto
Ditto
Ditto
Ditto
G.I Union
G.I Socket
G.I Plug
Gate valves(Pegler England)
No.
No.
No.
No.
3
3
1
3
1.606
Provide, Handle and install Fine screen
No.
1
1.607
Provide, Handle and install Course screen
No.
1
1.608
Provide, Handle and install Manhole cover (450x600mm)
No.
1
Sub-total
Total for Intake Weir, pipes and fittings..
GRAVITY MAIN
2.00
GRAVITY MAIN.
2.01
Bush clear the proposed pipeline route
m
3,260
2.02
Excavate and backfill 900mm depth x 300mm width trench
in soft ground
m
3200
2.03
Ditto in hard murram
m
60
2.04
Provide, lay, joint and test 4'' Ø UPVC class D pipes
m
3,200
2.050 Ditto 4'' Ø G.I class B pipes
m
60
2.060 Install double air valve AVs
no
2
2.070 Install Wash outs
no
2
2.080 Construct 900 x 900 x 1000 mm depth valve chamber with a
lockable cover
Publicity Sign Post
Sub Total for Gravity Main
no
2
no
1
Launching and Commissioning of Project
Allow for Engineers supervision. .
Grand Total (intake and Gravity Main)
100,000.00
200,000.00