kaboloin water project (design report)

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KABOLOIN WATER PROJECT (DESIGN REPORT)

1.0 Consumer Population Projection

Annual growth rate of 2.4 % (Source:- 2009 population census) shall be used for population projection. Annual growth rate for livestock unit is 2% and

will be projected to the future period and then assumed to remain constant. The development in educational facilities should be based on the existing

situation, the plans of Ministry of Education and the projected growth of the population.

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Population projection

Pf=Pp (1+r) n

Where

Pf- is future population.

Pp- is present population.

r- is rate of annual population growth.

n- is the number of years under consideration.

1.1 Consumer water demand projections.

The total water demand for the various classes of consumers has been based on the water consumption patterns spelt out in the Ministry of Water and

Irrigation practice manual 2005.

CATEGORY DESCRIPTION l/h/d CURRENT

POPULATION

FUTURE

POPULATION

(n=10 yr)

ULTIMATE

POPULATION

(n=20 yr)

CURRENT

WATER

DEMAND

(l/d)

FUTURE

WATER

DEMAND

(l/d)

ULTIMATE

WATER

DEMAND

(l/d)

HU

MA

N

KONDAMET 20 400 507 643 8000 10141 12856

Sub-total 8000 10141 12856

SC

HO

OL

S

KONDAMET

PRIMARY

SCHOOL

25 350 444 562 8750 11092 14061

KABOLOIN

SEC. SCHOOL 50 200 254 321 10000 12677 16069

KABOLOIN

PRY SCHOOL 25 400 507 643 10000 12677 16069

Sub-total 28750 36445 46199

LIV

ES

TO

CK

KONDAMET 50 1200 1521 1928 60000 76059 96416

Sub-total 60000 76059 96416

Grand Total 96750 122645 155471

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A. Demand for the total population

The Ultimate water demand is 155,471l/d

Demand per hour for the total population;

=Total ultimate water demand/ (12) =

= 12.96 M

3/Hr. =3.6l/s

B. HYDRAULIC DESIGN

Velocity range, V= 0.6≤V≤1.5

The altitude at storage tank at Kapcheptoror water treatment site = 2135M

The altitude of proposed Kondamet tank site= 2055M

Therefore difference in elevation between the intake point and tank site = 80M

The distance between two points = 13800M

From Colebrook Nomograph formulae deduced size piping:

Gravity main head, H = (2135-2055) = 80M

Ground masonry tank = 3 M

⸫ For PVC/GI pipes;

/100 x 13,800

= 358.8m

/100 x 13,800

= 524.4M

⸫ For PVC/GI pipes;

=0.35, G.I= 0.49

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/100 x 13,800

= 48.3M

/100 x 13,800

= 67.62M

Therefore,

Selecting the UPVC 3’’ pipe size

Total residual head= 80-48.3-3= 28.7 M.

Therefore water will flow by gravity.

1. Proposed Size storage tank

C = 0.03 x D x (T2)

Where:-

C = Tank capacity in m3

D = Total water demand in litres/day

T = Longest dry spell in months, average year

Stored water to last for seven days

=0.03*96750*(2.52)*7

=126,984.375 Litre tank Say 100 M 3 ground masonry storage tank.

2. Proposed distribution network.

The proposed distribution lines will be in 2’’ pipe network. This averaged to 4 Km.

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KABOLOIN WATER PROJECT

KAPSAOS WARD

(Construction of gravity main, 100m3 masonry ground level tank and construction of distribution pipeline)

SUMMARY BILL OF QUANTITIES

S/NO DESCRIPTION AMOUNT

1 Preliminaries 20,000

2 Excavation 4,380,000

3 Pipe Works 8,277,303

4 100M3 Ground masonry tank 1,735,439

5 SUB TOTAL 14,412,742

6 ADD 16% VAT 2,306,038.70

GRAND TOTAL 16,718,780.70

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KABOLOIN WATER PROJECT

KAPSAOS WARD

(Construction of gravity main pipeline, 100m3 masonry ground level water tank and construction of distribution pipeline)

BILL OF QUANTITIES

S/NO Description UNIT QTY RATE AMOUNT

1.0 Preliminaries

Provide, erect and maintain the project

sign board as directed by the supervisor on

site

No 1 20,000.00 20,000.00

Sub Total 20,000

2.0 Excavation

Rates for excavation and backfilling in the

trench shall include for trimming trench

bottom and providing selected bedding

and surround material from the

excavations and as directed by the

Engineer on site. Allow 2.5% supervision

cost.

2.1.1 Soft ground M3 12500 320 4,000,000

2.1.2 Hard ground M3 1000 380 380,000

Sub-Total 4,380,000

3 Pipe Works

Provide, lay, joint and test the following

pipes and fitting rates to include for all

the jointing materials cutting wastages and

anchorage as directed by the Engineer on

site. Allow 2.5% supervision cost.

3.1 UPVC 63mm dia class C/E; Pipeline tank

towards Kichagi.

M 950 220 209,000

3.1.1 UPVC 63mm dia class C/E: Pipeline tank

towards Kondamet/Kaboloin Sec. School

M 2610 220 574,200

3.1.2 UPVC 63mm dia class C/E: Pipeline from M 1513 220 332,860

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Baraka primary school towards Kapkiam

Secondary school

3.1.3 G.I. 80mm dia class B M 60 2700 162,000

3.1.4 G.I 60mm dia class B M 240 1500 360,000

3.1.5 HDPE 3inch dia PN 12 M 120 1000 120,000

3.1.6 uPVC 90mm dia class C/ E M 7676 800 6,140,800

3.17 Allow 5% pipe fittings 378,443

Sub-Total 8,277,303

4.1

TESTING OF THE WORKS

Testing, Disinfection & Flushing of

Pipelines and Fittings associated with

the tank and the tank itself. Pressure

Testing exc.12 bar but not exc.25 bar.

Testing to include for water tightness

as specified in the specifications

Testing and Commissioning of the

installed tank as specified (100m3

)

nr

1.00

10,000.00

10,000

4.1.1 Testing and Commissioning of pipes as specified.

m 75.00 150.00 11,250

4.2

EXCAVAIONS FOR FOUNDATIONS Excavate below stripped surface to formation level in

common material. Retain approved

material for backfilling / filling and

cart away unsuitable material to tip as

directed by Engineer

Excavation of topsoil depth not exceeding

0.25m

m3

9

300.00

2,804.82

4.2.1 Excavation of material other than top soil

rock or artificial hard material depth 0.25

- 0.5m

m3 9 300.00 2,804.82

4.2.2 Excavation for material other than

topsoil rock or any other artificial hard

material; maximum depth 0.5 - 1.0 m

m3 4 500 1,869.88

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4.2.3 Excavation of foundation in rock

m3 9 1,600.00 14,959.06

4.3

Disposal of Excavation Material

Trimming of excavated surfaces; material

other than topsoil, rock or artificial hard

material

m2

13.0

300.00

3,902.36

4.3.1

Preparation of excavated surfaces to

receive fill and permanent works;

materials other than topsoil or rock m2

13.0

300.00

3,902.36

4.3.2 Preparation of excavated surfaces to

receive fill and permanent works; in rock m2

13.0

300.00

3,902.36

4.3.3 Disposal of excavated topsoil m3 9.35 150.00 1,402.41

4.3.4 Disposal of excavated material other than

top soil rock or artificial hard material m3 13.09 150.00 1,963.38

4.3.5 Disposal of excavated rock m3 9.35 150.00 1,402.41

4.4.1

FILLING

THICK RED SOIL COMPACTED TO

98% MDD in layers

not exceeding 200mm as shown by RE

m3

14.96

240.00

3,590

4.4.2

Provide and fill with imported 300mm

gravel compacted to 98% MDD in layers

not exceeding 150mm m3

5.61

1,000.00

5,610

4.4.3

Provide and fill hard core with hard

basaltic or equivalent stone, well

compacted and blinded with crushed stone

to a finished thickness of 250mm under

the reservoir and valve chamber to stated

depth or thickness

m3

13.09

2,640.00

34,555

TOTAL CARRIED FORWARD TO NEXT

PAGE

103,919

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4.5.1

INSITU CONCRETE

Provision of Concrete

Designed mix; Grade C35A; Cement to BS12 and

20mm maximum aggregate size

m3

16.32

17,000.0

0

277,488

4.5.2 Prescribed mix; Grade C15P; 20 mm aggregate;

Cement to BS12

Placing of Concrete

m3

3.00

19,200.0

0

57,600

Place, compact and cure concrete in the following

elements of the structure as per details on

Drawings

Mass Concrete; Class 15/20

Mass concrete

4.6 75mm thick lean concrete blinding with mix ratio

(1:3:6) under the reservoir base slab, foundation and

valve chamber

m3

3.00

3,500.00

10,500

Reinforced Concrete class 30

4.7 Floor slab, bases and foundation footings m3 7.48 3,720.00 27,824

4.7.1 Suspended slabs (Top roof) thickness 200 - 250 mm m3 6.84 3,720.00 25,457

4.7.2 For overflow chamber complete with the base opening

m3 2.00 2,060.00 4,120

CONCRETE ANCILLARIES

Fair Finish Formwork

4.8 Plane vertical sides for both external and internal

walls m2 91.60 1,274.00 116,698

Reinforcement; deformed high yield steel bars to

BS 4449, HT = 425 N/mm2

4.9 Nominal size 8,10,12,16,25 mm Ton 1.63 136,000.0

0

221,990

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4.9.1 Steel fabric BS4483 ; A252 square mesh; nominal

mass 3 - 4kg/m2

LS

50,000.00 50,000

4.10.1

Joints

Open surface plain;average width n.e. 0.5 m

m

4.00

2000

8,000

4.10.2 Open surface with filler; average width n.e.0.5 m m 4.00 2000 8,000

4.10.3 Plastic water stops average width 150mm - 200 mm m 4.00 2000 8,000

4.10.4 Plastic or rubber water stop in floor/wall base joints;

Average width 350mm m 4.00

4.10.5 Sealant 20 x 20 mm rebate with plysulphide joint

sealant m 8.00 2000 16,000

Inserts; Excluding supply of the fittings

4.11.1 Inlet, outlet, overflow and washout pipe inserts into

concrete Nr 4.00 4,000.00 16,000

4.11.2 Roof vents inserts in concrete Nr 4.00 4,000.00 16,000

4.11.3 Roof drain inserts in concrete Nr 4.00 2,000.00 8,000 4.11.4 Perforated Roof drain pipe inserts in concrete m 22.00 500.00 11,000

TOTAL CARRIED FORWARD TO NEXT

PAGE

986,596

SITE WORKS

PIPEWORK – FITTINGS AND VALVES

PRECAST CONCRETE PIPES

5.1

PIPE WORK - MANHOLES AND PIPEWORK

ANCILLARIES.

Reservoir Scour/Overflow chamber with roof cover

slab as detailed; 200mm thick walls, depth 1.0 -

2.0m, 4m2

plan area

No.

1.00

42,000.0

42,000

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5.1.1 Reservoir Inlet Valve Chamber as detailed; 200mm

thick walls, depth 1.0 - 2.0m, 6m2

plan area No. 1.00 45,000.0

0

45,000

5.1.2 Reservoir Outlet Valves Chamber detailed; 200mm

thick walls, depth 1.0 - 2.0m, 10m2

plan area

No. 1.00 48,000.0

0

48,000

5.2

Miscellaneous Metalwork Rate to include supply, delivery, fixing and inclusive of foundation where applicable

Stainless Steel internal access ladder with safety

loops, stringers and landing rail

m

4.00

5,000.00

20,000

5.2.1 Galvanised Mild Steel external access ladder

with landing rails and stringers m 4.00 5,000.00 20,000

5.2.2

Provide and fix 6 mm sheet metal access cover

with 40x40 angle iron frame with latch and safety

lock for valve chamber and reservoir

No

1.00

2,000.00

2,000

5.2.3 Galvanized mild steel air vents as shown on the

drawings.

m 4.00 5,000.00 20,000

5.3

CLASS U: BRICKWORK, BLOCKWORK AND

MASONARY

200mm thick ashlar masonry vertical straight

walls; thickness 150 - 250 mm. To include mortar

and fixing reinforcement at the joints

m2

99.54

3,000.00

298,616

CLASS V: PAINTING

0

5.4 Two coats of cement paint on rendered external walls. m2 99.54 1,500.00 149,308

TOTAL CARRIED FORWARD TO SUMMARY SHEET 644,924

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Appendix: Pipeline profiles

a. Kapsaos tank- Baraka Village

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b. Kapsaos tank-Baraka Junction

c. Baraka junction – Kogo academy

d. Kogo Academy – Kondamet 100 cumec proposed tank.

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e. Kondamet proposed tank- Kaboloin Sec.

f. Baraka Village –Kapkiam Sec. School

kaboloin water project (design report)

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