Table 1 : List of Defects in Sewer Network in District 1

Defect ID Location Defect

Details of Sewer Assets involved

Pipe Manhole

Dia Material Depth On/off Road Length Depth Size On/off Road Type Size

1-01 Madampitiya Road Opposite Modara Police StationPipe Corrosion (Crest )

1100 mm DI 2 m center 20 m

1-02 Along Dilasal Street at Muthuwalla JuncitonPipe Corrosion

1500 mm Concrete 3 m off road 60 m

1-03 Along St Andrew's Road at Muthuwalla Mawatha Pipe Corrosion 600 mm DI

1-04 Over Flow

1-05 Opposite CMC Community Center Over Flow

1-06 S.D. Fernando Mw and Aluth Mawatha Junction Frequantly cleanning

7-Jan Infront of Rock house Army CampPipe Corrosion

600 mm DI

Description of Defect LINE

Collapse of pumping main

Collapse of pumping main

Collapse of pumping main

From Aluth Mawatha, Eli Lane Junction to K. Cecil Perera Mawatha

Manhole Overflow due to public encroach of the gravity sewer

Manhole Overflow due to public encroach of the gravity sewer

Downstream catchment has enclosed by the public. Therefore cleanning of the system was unable to continue

Collapse of pumping main ( Habour)

Details of Sewer Assets involved

Possible Remedial MesuresOverflow

On/off Road Dia Length Outlet

HIGH HIGH

HIGH High

12 " 405 m

HIGH HIGH

9 " 104 mHIGH HIGH

HIGH HIGH

HIGH HIGH

Severity of Environmental Impacts

Severity of Social Impacts

Further Investigations of this main

Further Investigations of this mainFurther Investigations of this main

Existing Red-Bana canal

Existing Red-Bana canal

Table 2 : List of Defects in Sewer Network in District 2A

Defect ID Location Defect

Details of Sewer Assets involved

Pipe

Dia Material Depth On/off Road

2A-01Structural Faliure

2A-02can not access

2A-03

2A-04

2A-05 Downstream of Dam Street 9 inch clay 15 ft

2A-06 Gravity Sewer has colloapsed 9 inch clay 20 ft center

2A-07 9 inch clay 15 ft

2A-08 From Habour to clock tower Manholes are not available Sewer directly go to sea 9 inch clay 15 ft

2A-09Downstream of Stace Road sewer is not functioning

9 inch clay 12 ft

2-102-11

Description of Defect LINE

D. R. Wijewardana Mawatha to 5th cross street

Top part of the manhole has been shifted in one manhole

D. R. Wijewardana Mawatha to 5th cross street

Accessability problem to reach the manholes in this section

Olcut Mawatha juction to Main Street junction along 5 th cross Street

can not access to the manholes

Accessability problem to reach the manholes in this section

Olcut Mawatha juction to Main Street junction along 5 th cross Street

can not access to the manholes

Accessability problem to reach the manholes in this section

sewer has been disconnected due to peoples park construction

Flowing has stopped to the downstream because of the disconnection

private premises

From Jampata Street and K.B. Cristie Perera MW Juncttion along Jumpata Lane

From M. H. 6.1 to M.H. 6.2

From Mihindu Mawatha to Sri Sangaraja Mawatha

Can not aceess to the 3/4 of the length

Hydralic capacity has come down due to the blockage

private premises

sewer goes through private premises

private premises

2-122-132-142-152-162-173-183-193-203-213-223-233-243-253-263-273-283-293-303-313-323-333-343-353-363-373-383-393-403-413-423-433-443-453-463-473-48

3-493-50

Details of Sewer Assets involved

Pipe Manhole Overflow

Length Depth Size Depth On/off Road Type Size On/off Road Dia Length Outlet

1.5 x 2 concrete 15 ft

386 m 1.5 x 2 concrete 15 ft

50 m 1.5 x 2 concrete 20 ft

104 m 1.5 x 2 concrete 20 ft

263 m

331 m

439 m

313 m

801 m

Inside the Manning Market

Inside the Manning Market

Side of the road

Side of the road

Possible Remedial Mesures

Investigation

High High

Low Low

shifting of unathorised stalls

Low Low

shifting of unathorised stalls

High high Need to rehabilitate

High High

High High

High High

Severity of Environmental Impacts

Severity of Social Impacts

Obtain enough space to access to manholes

Table 3 : List of Defects in Sewer Network in District 2B

Defect ID Location Defect

Details of Sewer Assets involved

Pipe

Dia Material Depth On/off Road

2B-01 Hudson Road damage line Pipe Faliure 9 " CLAY 12 ' On Road2B-02 ST Michical RoadST Michical Road damage line Pipe Faliure 9 " CLAY 12 ' On Road2B-03 ARMY HEAD QUTERS damage line

9 " CLAY 12 ' On Road

2B-04 WEKANDHA ROAD damage line Pipe Faliure 9 " CLAY 10 ' 0FF ROAD2B-05 60 PARK STREET60 PARK STREET60 PARK STREET damage line Pipe Faliure 9 " CLAY 15 ' ON ROAD2B-06 DEWANAMPIYATHISSA MAWATHA damage line Line blocakage 9 " CLAY 12 '2B-07 JUMMA MASJID damage line

9 " CLAY15 '

2B-08 SRI SADARMA MAWATHA DAMAGE MANHOLE Pipe Faliure 9 " CLAY 14 '2B-09 DEMATAGODA ROAD DAMAGE LINE 9 " CLAY 15 '2B-10 DEMATAGODA ROAD DAMAGE LINE 9 " CLAY 15 '2B-11 DEMATAGODA ROAD DAMAGE LINE 9 " CLAY 16 '2B-12 DEMATAGODA ROAD DAMAGE LINE 9 " CLAY 14 '2B-13 DEMATAGODA ROAD DAMAGE LINE 9 " CLAY 20 '2B-14 DEMATAGODA ROAD DAMAGE LINE 24 " CLAY 20 '2B-15 PANCHIKAWATHA ROAD DAMAGE LINE 9 " CLAY 12 ' 2B-16 PANCHIKAWATHA ROAD DAMAGE LINE 9 " CLAY 12 '

3-203-213-223-233-243-253-263-273-28

Description of Defect LINE

Pipe and manhole faliure

Design Problem in the sewer and Pump Station

3-293-303-313-323-333-343-353-363-373-383-393-403-413-423-433-443-453-463-473-483-493-50

95 30 204 63 18 18 5645 69 138 67 77 56 4541 56 183 68 76 66 760 57 88 198 32 55 3659 58 95 31 89 42

300 57 174 37 65 45327 238 42 70 45

124 313 74 27689 6282 57

192 6121607 925

Details of Sewer Assets involved

Pipe Manhole Overflow

Length Depth Size On/off Road Type Size On/off Road Dia Length Outlet

107 m 12 On Road HIGH159 m 12

158 m 12

514 m 10198 m373 m

313 m

612 m

327 m

300 m

276 m257 m

374 m

Severity of Environmental Impacts

50 22 5415 92 5767 91 3561 76 8864 93 9

257 374 12255

Possible Remedial Mesures

HIGH RE CONSTRUCT

Severity of Social Impacts

Table 4 : List of Defects in Sewer Network in District 3

Defect ID Location Defect

Details of Sewer Assets involved

Pipe

Dia Material Depth On/off Road

3-01Flow is very low

9 " Clay Center

3-02Flow is very low

9 " Clay Center

3-03

3-04

3-05 9 " Clay Center

3-063-073-083-093-103-113-123-133-143-153-163-173-183-193-203-213-223-23

Description of Defect LINE

Woard Place Borella Cross Road Junction

Line may be collapsedin the middle

Gregaries road and Wijerama Junction along Gregaries Road

Line may be collapsedin the middle

Dharmarama Road towards Baseline Road

Overflow in wet weather

Low Capacity of the sewer

From Walikada Prison to Pump Station

Overflow in dry weather

Low Capacity of the sewer

Aramaya Road upto Dematagoda Pump Station

Frequant Blocking of the main

Sewer is not enough to cater the flow in here

3-243-253-263-273-283-293-303-313-323-333-343-353-363-373-383-393-403-413-423-433-443-453-463-473-483-493-50

97 61 7951 99 2956 100 5066 61 7968 100 7968 50 31651 41

86 4969 561747475606755

1017

Details of Sewer Assets involved

Pipe Manhole Overflow

Length Depth Size On/off Road Type Size On/off Road Dia Length Outlet

57 mHIGH

316 mHIGH

9 " 196 m Storm waterHIGH

9 " 1017 m Storm waterHIGH

561 mHIGH

Severity of Environmental Impacts

Possible Remedial Mesures

HIGH

HIGH

HIGH Further Investigation

HIGH Further Investigation

High Further Investigation

Severity of Social Impacts

Further Investigation and repair the defect

Further Investigation and repair the defect

Table 4 : List of Defects in Sewer Network in District 4

Defect ID Location Defect

Details of Sewer Assets involved

Pipe

Dia Material Depth On/off Road

4-01Manhole Overflow

4-02Sewer overflow

9 " Clay ceter

4-039 " clay

center

4-04Narahepita Junction Line Blockage

9 " claycenter

4-059 " clay

4-06Line Overflow

9 " clay center

4-07

500 mm DI Center

4-08Pipe Corrosion 1000 mm Concrete center

3-103-113-123-133-143-153-163-17

Description of Defect LINE

Kappetipola Road to Jawattha Road Junction

Overcapacity and desilting

Kappetipola Mawatha ( Summit Flats )

No connections to Stormwater mains and desilting of the sewer

Along the sewer connect to the park Road main sewer

Sewer overflow in Rainy seasons There are overflow

connections to the Kirulapana Canal

Storm water has connect to the sewers

Matha Road to the Base Line Road Junction

Line Blockage and Overflow Storm water has connect

to the sewers ins Elvetigala Flat

Isipathana Road and Thimbirigasyaya Junction

Storm water has connect to the sewers

Chithra Lane Junction along Chithra Lane

Connection of Force main (CFM 8) and CS17

Two Manholes have collapsed in the connection of these two mains

CS - 17 in the Amarasekara Mawatha

Force Main (Gravity) Collapsed

3-183-193-203-213-223-233-243-253-263-273-283-293-303-313-323-333-343-353-363-373-383-393-403-413-423-433-443-453-463-473-483-493-50

Details of Sewer Assets involved

Manhole Overflow

Depth Size On/off Road Type Size On/off Road Dia Length Outlet

centerHigh

High

High

High

High

High

High

Severity of Environmental Impacts

Possible Remedial Mesures

High

High

High

High

High

High

High

Severity of Social Impacts

Clean the sewer and dsiconnection of the storm water connection

Storm water from houses should connect to the storm water mains

Disconnection of existing connection to the nearby canal

Disconnection of existing connection to sewer mains

Disconnection of existing connection to sewer mains in the houses

Reconstruction of the manholes and repair the mains

Table 5 : List of Defects in Sewer Network in District 5

Defect ID Location Defect

Details of Sewer Assets involved

Pipe

Dia Material Depth

5-01 9" clay

5-02

5-03 9" clay

5-04

5-05 Galle road near Stambul Place Gravity sewer collapse (T 15) 9" clay5-06 W.A.Silva Mawatha (W 19 ) frequent blockages 9" clay

5-07 (U3) freequent Blockages 9" clay

5-08 9" clay

5-09Frakfort place to Ridgeway place

9" clay

5-10

3-11 Near Roxy Cinema in Galle Road Force Main Collapsed

1100 mm DI 20 ft3-12 Force Main Collapsed

500 mm DI 6 ft3-13

Description of Defect LINE

Duplication Road from loris road to Valukarama Road

Permenant blokage near 5th lane junction (T 11)

Gover Street, Police park Avenue, Lorris Lane, Thunmulla , Thurstan Road, 5th lane, St Anthanies, Parm Grow

Frequent blockages at rainy season Suspect capacity of Polwaththe Pumping Station Road surace depression notice in thunmulla

Marine Drive Stambul place to Bambalapitiya pumping Station

(U 1) Due to RDA Marine drive development badly affected

Havlock Road from Anula Road to Wellawatta Bridge

Syphon line Frequent blokages Silts deposited at rainy seson(W 50) suspected modification done in 1986 CS 21

Marine Drive fromMelborn Avenue to Bambalapitiya pumping Station

Galle Road from Dharmarama Road to W.A. Silva Mawatha

(W18) collapsed repaired last year near Alexandra Road

(W 26) frequent blokages in Bambalapitiya flats

Hapdone Lane Walukarama Road Junction

Lid open in every rainy day due to water pressure in MH no 18 need further investigation in CS - 16

Due to pipe corrosion in partial

Infront of HSBC bank in Bambalapitiya

Due to not functioning of Air Valve

3-143-153-163-173-183-193-203-213-223-233-243-253-263-273-283-293-303-313-323-333-343-353-363-373-383-393-403-413-423-433-443-453-463-473-483-493-50

Details of Sewer Assets involved

Pipe Manhole Overflow

On/off Road Length Depth Size On/off Road Type Size On/off Road Dia Length Outlet

1174 m

1097 m

85 m421 m

1286 m

437 m

879 m

63 m

Possible Remedial Mesures

High High

High High

Severity of Environmental Impacts

Severity of Social Impacts

Collapsed part has repaired and other part needs investigations and relay

Proper Investigation since early stage of construction