district 1 , 2a, 2b , 3 , 4 and 5
TRANSCRIPT
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