REPUBLIC OF KENYA

MINISTRY OF WATER &SANITATION AND IRRIGATION

TANATHI WATER WORKS DEVELOPMENT AGENCY(TAWWDA)

MAVOKO WATER AND SEWERAGEINTERVENTIONS - EXTENSIONS OF

PIPELINE:Jam City, Quarry Road, & Devki-Gimu Water

Pipeline Extensions and Upgrade Project

VOLUME IV OF IV

ENGINEERING DRAWINGS

TAWWDA/001/2021-2022

DATE: AUGUST 2021

Employer:

The Chief Executive Officer,

Tanathi Water Works Development Agency

KIDP Building, Kalawa Road

Private Bag

KITUI

NTS

ROAD CROSSING DETAILMAVOKO WATER & SEWER INTERVENTIONSPHASE I

PROJECT: TITLE:

DESCRIPTIONDATEREV. No.

DESIGNED : E.KAPPROVED :F.K.SDATE :SCALE :

JULY 2021

ROAD CROSSING DETAILS SECTION 1 - 1

6,000

125 MM G.I PIPE SLEEVE

WITHOUT CONCRETE SURROUND

A

A

Existing Road Surface

12001,500

Road Reserve Boundary

Road Carriage Way(All Weather Road)Roadside Drain Roadside Drain

Proposed Pipeline Crosing

POINT A

POINT B

1500 6000 1500

ROAD CROSSING DETAILS PLAN

NO

T LE

SS

TH

AN

1M

- 1M

MASS CONCRETE

ANCHOR BLOCK

MAX L MAX L MAX L

ELEVATION

SCALE 1:100

GS OR D1 PIPE WITH FLANGED JOINT

CONNECTION TO PVC

PIPE MINIMUM 2M

E.V. GABION BASKETS

GS OR D1 PIPE WITH

FLANGED JOINT

1400

1450

700

750

MASS CONCRETE ANCHOR BLOCK

SCALE 1:50

1200

700

1200

700

600

150

H (VARIES)

STIRRUPS

Y8@300mm c/c

REINFT. Y12

GRAVEL

SEE DETAIL

COLUMN

SCALE 1:50

STEEL STRAP 100x6mm

TWO NUTS

25mm ∅ RAG BOLT

50x50x300mm RECESS

DETAIL

SCALE 1:10

250 D 250

200

D100

100

PIPE UNDER RIVER BED

SCALE 1:20

GRAVEL

90

750

70

225

25

225 2525

62 62 69.5

12

INDICATOR POSTS

SCALE 1:10

MASS CONCRETE

TO FOUNDATION

CLASS DD

69.5

CONCRETE CLASS CC

STIRRUP Y8@50mm c/c

REINF. Y12

REINFORCEMENT

DETAILS

SCALE 1:10

A A

3

3 6 3

DETAILS OF LETTERING

SCALE 1:1

NOTE

WHITE LETTERING WITH

BLUE BACKGROUND

DIMENSIONS AS

FOR SLUICE VALVE

70

05

00

SIGN BOARD

SEE DETAILS

40MM GS PIPE

WITH A CAP ON

TOP AND THE

SIGN BOARD

WELDED TO

12MM MS BAR

LENGTH 200mm

THROUGH PIPE

MASS CONCRETE CLASS C

PIPELINE MARKER TYPE I

SCALE 1:20

200

10

0

PVC 150 BSTEEL PLATE

3mm THICK

DETAILS OF SIGN BOARD

SCALE 1:5

NOTE:

WHITE LETTERING WITH

BLACK BACKGROUND

100

100 100

12

00

CONCRETE

CLASS CC

MASS CONCRETE

CLASS D

2Y12

PIPELINE MARKER TYPE II

SCALE 1:20

50

275

SECTION A-A

SCALE 1:5

NOTES

1. MAX. L AS SHOWN IN TABLE BELOW IF OTHER THICKNESS ARE

TO BE, USED, STRUCTURAL ENGINEER TO BE CONSULTED

2. IF H>5m, STRUCTURAL ENGINEER SHOULD BE CONSULTED

3. ANCHOR BLOCKS AND COLUMNS TO BE FOUNDED ON ROCK IF

POSSIBLE. WHERE ANCHOR BLOCKS AND COLUMNS ARE

PLACED IN RIVER, THEY SHALL BE PROTECTED FROM

EROSION BY GABION BASKETS HEIGHT 0.5m FILLED WITH

STONES ROUND THE FOUNDATION BLOCK

4. ALL STEEL (STRAPS, BOLTS, ETC) TO BE GALVANIZED OR

PROTECTED ACCORDING TO SPECIFICATIONS

5. ALL FLANGES TO BE WELDED ON

DIAMETER

(mm)

WALL THICKNESS

(mm)

MAX. L

(m)

250 6.0 15.0

200 5.0 13.0

150 4.5 11.0

100 4.5 9.0

100 4.0 8.5

80 4.0 7.5

DRG. No.

TRACED A. BACKMAN

APRIL 2010

DIGITIZED

MINISTRY OF WATER &

IRRIGATION- MAJI HOUSE

APRIL 2010

CHECKED

RIVER CROSSING

MARKER POST

INDICATOR POSTS

SCALE: AS SHOWN

APRIL 2010

APPROVEDD.W.S

SHEET: 1 of 1

DESIGNED VIAK E.A. LTD

SEPT. 1974

SEPT. 1974

J.G. Muturi

ENG. B.I. Kasabuli

M.W.I

015-TYPE-003

DRG. No.

TRACED

APR. 2010

DIGITIZED

MINISTRY OF WATER &

IRRIGATION- MAJI HOUSE

APR. 2010

CHECKED

JOINTS AND SECTIONAL VALVES

SCALE:

JAN 2010

APPROVEDD.W.S

SHEET: 1 of 1 DESIGNED Qlan Vally

18-8-1974

S. M. Kibachio

ENG. B.I. Kasabuli

C1765/25

DUCTILE SPUN IRON

PIPE WITH SPIGOT END

CAST IRON FLANGED SOCKET

PVC FLANGED SOCKET

PVC PIPE

JOINT PVC DUCTILE SPUN IRON

JOINT PVC DUCTILE SPUN IRON

DUCTILE SPUN IRON

PIPE WITH SOCKET END

CAST IRON FLANGED

SPIGOT

PVC FLANGED SOCKET

PVC PIPE

PVC FLANGED SOCKET

PVC PIPE

STEEL PIPE

JOINT PVC - STEEL > 75 mm

JOINT PEH - STEEL < 50 mm

PEH

SINGER COUPLING PEH - GS

FEMALE THREADED

GS PIPE

JOINT PVC - STEEL < 50 mm

STEEL PIPE

SOCKET

ADAPTOR UNION FOR

PVC - STEEL PIPE

PVC PIPE

PVC MAIN

PVC FLANGED SOCKET

FLANGED SLUICE VALVE

G.S FLANGED PIPE 1 M LONG

PUDDLE FLANGE

ANCHOR BLOCK

PVC FLANGED SOCKET

SECTIONAL VALVE FOR 75 - 300 mm PVC MAIN

SCREWED GATE VALVE

PVC SCREWED ADAPTOR (PVC MAIN) SINGER

COUPLING MALE THREADED (PEH MAIN)

PVC MAIN

SECTIONAL VALVE FOR 25 - 50 mm PVC/PEH MAIN

FLANGED SLUICE VALVE

CAST IRON FLANGED SPIGOT

DUCTILE SPUN IRON PIPE

ANCHOR BLOCK

CAST IRON

FLANGED SOCKET

SECTIONAL VALVE FOR 100 - 250 mm DUCTILE SPUN IRON PIPE

≤300

≤300

H

1300

300

650

330

330

HOOK

RINGS AND/OR CONCRETE

SURROUNDING

*200-400

* WHEREVER

POSSIBLE!

HEAVY DUTY COVERS ONLY!

NO TRIANGULAR COVERS

USE PREFERABLE CIRCULAR COVERS

COVERS ABOVE THE FLOOD LEVEL

STRUCTURE TO BE ABSOLUTELY

WATER TIGHT

H min = 1250mm

HOOKS OF ∅20mm

GALVANIZED STEEL BARS

OPPOSITE OF INCOMING

SEWER

INCASE OF PVC PIPES

USE WALL PROTECTION

SLEEVE

80

30

0

1

:

3

1

:

3

INVERT LEVEL

SIDE CONNECTION IF POSSIBLE

NOT BELOW CENTRE LINE OF

MAIN SEWER

CROWN OF SIDE CONNECTION

PIPE NEVER BELOW CROWN OF

MAIN SEWER

5

%

800

H

WALL PROTECTION

SLEEVE IN CASE OF

P.V.C. PIPE

1000

200

150 TO 300mm

WHEREVER POSSIBLE

TYPE FOR H=0.8 - 1.25m

MANHOLE GUIDELINES

TO BE USED ACCORDINGLY!

1

:

3

800

H

200

150 TO 300mm

WHEREVER POSSIBLE

TYPE FOR H< 0.8m

CHANNEL WIDTH

ACCORDING I.D. PIPE

CENTRE LINES OF THE TWO

SEWERS TO MEET IN THE CENTRE

OF MANHOLE

r =

5.I.D

.

I

.

D

.

2

0

≥1800

1000 min

TO BE USED FOR PIPES

WHOSE Ø > 1800

4

5

°

≥200

PLACE COVER ALWAYS

TOWARDS DOWNSTREAM

SIDE OF MANHOLE

SULPHATE RESISTING CEMENT

TO BE USED FOR BENCHMARKING.

AVOID BACKDROPS!

USE INSTEAD

ADDITIONAL MANHOLES

303

INTERNAL DROP

400mm MAX.

IN MANHOLES WITH H > 1.25m C.I. STEP IRONS

SHALL BE INSTALLED

WHERE H > 5.25m LADDERS WITH SAFETY

CAGE SHOULD BE USED INSTEAD!

DRG. No.

TRACED J. ODUOR

APRIL 2010

DIGITIZED

MINISTRY OF WATER &

IRRIGATION- MAJI HOUSE

APRIL 2010

CHECKED

MANHOLES & INSPECTION

CHAMBERS

SCALE: AS SHOWN

APRIL 2010

APPROVEDD.W.S

SHEET: 1 of 1

DESIGNED

SEPT 1983

J.G. Muturi

ENG. B.I. Kasabuli

M.W.I

017-TYPE-007

20

03

00

70

0

25

50

2525

25

25

75

25

75

75 75

1:3:6 CONCRETE MIX

ZZ

LETTERING ON INDICATOR POST

TO BE W.D, S.V, W.O, A.V.

SIDE ELEVATION

SCALE 1:5

ZZ

50

100

4Y12

COVER = 25mm

6Y

8@

15

0m

m c/c

R.C. DETAILS

SCALE 1:5

250

100

10

0

25

0

PLAN

SCALE 1:5

100

10

0

SECTION Z-Z

SCALE 1:2

Y8 STIRRUPS

Y12 BARS

INDICATOR POSTS FOR PIPELINE, SECTION VALVES, AIR VALVES & WASH OUT

3

3 6 3

LETTERING GROOVE

DETAILS OF LETTERING

SCALE 2:1

NOTE: PAINTED BLUE WITH WHITE LETTERS

DRG. No.

TRACED N.K. Kakui

APRIL 2010

DIGITIZED

MINISTRY OF WATER &

IRRIGATION- MAJI HOUSE

CHECKED

INDICATOR POSTS FOR PIPELINE

MARKERS

SCALE: AS SHOWN

APPROVEDD.W.S

SHEET: 1 of 1

DESIGNED P.N. Machiri

MAY 1977

MAY 1977

J.G. Muturi

ENG. B.I. Kasabuli

M.W.I

016-TYPE-001

APRIL 2010

APRIL 2010

³

³

³

³

³

³

³

³

³

2150

150 1850 150

15

0

14

00

11

00

15

0

2250

1501850150

1100

10

0

FGL

TO

B

E D

ET

ER

MIN

ED

O

N S

IT

E

FGL

1:20

SECTIONAL ELEVATION A - A

250

25

0

CI STEP IRONS CAST IN

150 x 150 x 20 THICK

(6 No. 250 c/c AND

STAGGERED)

1300

1000150 150

11

00

14

00

15

01

50

TO

B

E D

ET

ER

MIN

ED

O

N S

IT

E

FGLFGL

10

0

150

1400

1000 150

1100

SECTIONAL ELEVATION B - B

1:20

25

0

250

150 x 150 x 20 THICK

CI STEP IRONS CAST IN

(6 No. 250 c/c AND

STAGGERED)

60

0

600

600 x 600 x 600 DEEP

SELECTED RUBBLE FILL

1

A A B B

SECTIONAL PLAN

1:20

SECTIONAL PLAN

1:20

2

3

4

5

1

1

5

4

3

2

1

1

3

1

4

5

4 1

3

2

1

2

3

1

4

5

1

32

4

2

DESCRIPTION

SCHEDULE OF PIPEWORK & FITTINGS

PLAIN ENDED PIPE PIECE, L = 1000

COUPLINGS TO SUIT WATER MAIN SIZE AND

SINGLE FLANGED PIPE PIECE, L = 1000

DOUBLE FLANGED SLUICE VALVE

5.

4.

MATERIAL

FLANGE ADAPTOR3.

2.

1.

ITEM

ND 150

ND 150

ND 150

ND 150

ND 150

SIZE

ND 1501. FLANGE ADAPTOR

ALL FLANGED TEE

DOUBLE FLANGED 90Á BEND

DOUBLE FLANGED SLUICE VALVE

3.

5.

4.

2.

ND 150

ND 150

ND 150

ND 150

SCHEDULE OF PIPEWORK & FITTINGS

ITEM DESCRIPTION SIZE

SINGLE FLANGED PIPE PIECE L = 1000

TOTAL No.

3

6

COUPLINGS TO SUIT WATER MAIN SIZE AND

MATERIAL

6. ND 150

4

2

3

2

1

1

TOTAL No.

1

1

1

1

2

4% SLOPE

4

%

S

L

O

P

E

600 x 600 x 600 DEEP

SELECTED RUBBLE FILL

600

60

0

4

%

S

L

O

P

E

4%

S

LO

PE

TO

T

AN

K C

OM

PA

RT

ME

NT

WIT

H D

IV

IS

IO

N W

AL

L

TO

T

AN

K C

OM

PA

RT

ME

NT

WIT

H D

IV

IS

IO

N W

AL

L

50 mm DIA. PVC

A252 MESH (Y8@200 c/c) A252 MESH (Y8@200 c/c)

CLASS 15 MASS CONCRETE

2250 x 1500 x 100 THICK PCC (REINF.)

SLAB WITH 900 x 600 ACCESS MANHOLE A252 MESH

TOP + BOTTOM

A252 MESH

TOP + BOTTOM

1400 x 1300 x 100 THICK PCC (REINF.)

SLAB WITH 900 x 600 ACCESS MANHOLE

25 DEEP CEMENT SCREED

TO 4 % SLOPE

100 DEEP CONCRETE

FLOOR SLAB

25 DEEP SAND

BLINDING

25 DEEP SAND

BLINDING

25 DEEP CEMENT SCREED

TO 4 % SLOPE

100 DEEP CONCRETE

FLOOR SLAB

PRODUCED BY AN AUTODESK EDUCATIONAL PRODUCT

PR

OD

UC

ED

B

Y A

N A

UT

OD

ES

K E

DU

CA

TIO

NA

L P

RO

DU

CT

PRODUCED BY AN AUTODESK EDUCATIONAL PRODUCT

PR

OD

UC

ED

B

Y A

N A

UT

OD

ES

K E

DU

CA

TIO

NA

L P

RO

DU

CT

1493

1494

1495

1496

1497

1498

1499

1500

1501

1502

0 100 200 300 400 500 600 700 800 900 1000

Ele

vati

on

(m)

Chainage(m)

Sunset to Graceland-Pipeline profile

1496

1498

1500

1502

1504

1506

1508

0 200 400 600 800 1000 1200 1400 1600

Ele

vati

on

(m)

Chainage(m)

Gimu Mainline - Pipeline Profile

1532

1532.5

1533

1533.5

1534

1534.5

1535

1535.5

1536

1536.5

1537

0 100 200 300 400 500 600 700 800 900

Ele

vati

on

(m

)

Chainage(m)

Hill Crest Turfform - Pipeline Profile

1530

1531

1532

1533

1534

1535

1536

0 100 200 300 400 500 600 700

Ele

vati

on

(m)

Chainage(m)

Hill Crest to Kwa Maingey - Pipeline Profile

1496

1498

1500

1502

1504

1506

0 200 400 600 800 1000 1200

Ele

vati

on

(m)

Chainage (m)

Devki Mainline-Pipeline profile

1490

1495

1500

1505

1510

1515

1520

1525

0 500 1000 1500 2000 2500

Ele

vati

on

(m

)

Chainage(m)

Pine City - Pipeline Profile