O M Sewerage Schemes TSS Mace Running contract 2026 PETTAH area Rectification of blockages Cleaning sewer line and allied works in the PETTAH area for a period of one year Sewerage Work

Sewe line works

15.43.2:Dismantling manually / by mechanical means including stacking of serviceable material and disposal of unserviceable material within 50 metres lead as per direction of Engineer -in-Charge:Bituminous road

15.2.1:Demolishing cement concrete manually / by mechanical means including disposal of material within 50 metres lead as per direction of Engineer - in-Charge.Nominal concrete 1:3:6 or richer mix (i/c equivalent design mix)

15.7.4:Demolishing brick work manually / by mechanical means including stacking of serviceable material and disposal of unserviceable material within 50 metres lead as per direction of Engineer-in-Charge.In cement mortar

100.1.1:Excavating trenches of required width for pipes, cables, etc., including excavation for sockets, and dressing of sides, ramming of bottoms, depth up to 1.5m, including getting out the excavated soil, and then returning the soil as required, in layers not exceeding 20cm in depth, including consolidating each deposited layer by ramming, watering, etc., and disposing of surplus excavated soil as directed, within a lead of 50m, in all kinds of soil.

100.1.2:Excavating trenches of required width for pipes, cables, etc., including excavation for sockets, and dressing of sides, ramming of bottoms, depth exceeding 1.5m but not exceeding 3m, including getting out the excavated soil, and then returning the soil as required, in layers not exceeding 20cm in depth, including consolidating each deposited layer by ramming, watering, etc., and disposing of surplus excavated soil as directed, within a lead of 50m, in all kinds of soil.

100.8.1:Fencing one side of trenches, 1.50m height with two rows of 10cm plastic caution tape in vertical casuarina pole (girth 15cm to 24cm) fixed at 2m intervals.

100.8.2:Fencing 1.50m high with two rows of casuarina poles (girth 15cm to 24cm) tied with coir yarn on vertical casuarina pole (girth 15cm to 24cm) fixed at 1.5m intervals.

2.16.1:Close timbering in trenches including strutting, shoring and packing cavities (wherever required) complete (Measurements to be taken of the face area timbered).Depth not exceeding 1.5m

2.16.2:Close timbering in trenches including strutting, shoring and packing cavities (wherever required) complete (Measurements to be taken of the face area timbered).Depth exceeding 1.5 m but not exceeding 3 m

100.43.2:Conveying, laying and jointing glazed stoneware pipes class SP-1 with stiff mixture of cement mortar in the proportion of 1:1 (1 cement : 1 fine sand) including testing of joints etc., complete (excluding cost of pipes): 150mm diameter pipe.

100.43.3:Conveying, laying and jointing glazed stoneware pipes class SP-1 with stiff mixture of cement mortar in the proportion of 1:1 (1 cement : 1 fine sand) including testing of joints etc., complete (excluding cost of pipes): 200mm diameter pipe.

100.43.4:Conveying, laying and jointing glazed stoneware pipes class SP-1 with stiff mixture of cement mortar in the proportion of 1:1 (1 cement : 1 fine sand) including testing of joints etc., complete (excluding cost of pipes): 250mm diameter pipe.

100.43.5:Conveying, laying and jointing glazed stoneware pipes class SP-1 with stiff mixture of cement mortar in the proportion of 1:1 (1 cement : 1 fine sand) including testing of joints etc., complete (excluding cost of pipes): 300mm diameter pipe.

OD223666/2025-2026:Boring the sewer main portion to rectify the blockage at the portion of blockages and to allow the free movement of rope for cleaning purpose and making good the damages by jointing with cement and pipe etc. complete including cost of 3 kg cement / each.

4.1.3:Providing and laying in position cement concrete of specified grade excluding the cost of centering and shuttering - All work up to plinth level:1:2:4 (cement : 2 coarse sand (zone-III)derived from natural sources : 4 graded stone aggregate 20 mm nominal size derived from natural sources)

OD223667/2025-2026: Conveying CI /R C C M H cover with frame from departmental store to site and fixing the same in position including cost of 10 kg cement /each

100.9.9:Laying uPVC pipes of class 2 to class 6 and specials, lowering to the trenches already made, placing in position aligning the pipeline to the lines and levels and jointing the pipes and specials with solvent cement and testing the pipeline with water to the required test pressure (excluding cost of pipes and specials): 110 mm nominal outside diameter pipes.

General Maintenance items

OD223664/2025-2026:Plugging the full portion of the mouth of 100mm dia sewer main using clay filled gunny bags and removing the same after completion of work etc complete

OD223654/2025-2026::Plugging the full portion of the mouth of 150mm to 200mm dia sewer main using clay filled gunny bags and removing the same after completion of work etc complete

OD223663/2025-2026:Plugging the full portion of the mouth of 225 to 300mm dia sewer main using clay filled gunny bags and removing the same after completion of work etc complete.

OD223660/2025-2026:Cleaning 100mm/110mm line with cleaning rod- <br>Cleaning the silt deposited inside the sewer line of 100mm dia with the help of sewer cleaning equipment and scrappers fitted in nylon wire inserted from one manhole to next removing floated matters and silt collected in the lower manhole conveying and carrying the same in suitable places as directed by deptl officers<br>including cost of oil, carbolic soap, phenyle and hire charges for the bucket and other tools etc. complete

OD223665/2025-2026:Cleaning 150mm line with cleaning rod- <br>Cleaning the silt deposited inside the sewer line of 150mm dia with the help of sewer cleaning equipment and scrappers fitted in nylon wire inserted from one manhole to next removing floated matters and silt collected in the lower manhole conveying and carrying the same in suitable places as directed by deptl officers including cost of oil, carbolic soap, phenyle and hire charges for the bucket and other tools etc. complete

OD223652/2025-2026:Cleaning 200mm line with cleaning rod- <br>Cleaning the silt deposited inside the sewer line of 200mm dia with the help of sewer cleaning equipment and scrappers fitted in nylon wire inserted from one manhole to next removing floated matters and silt collected in the lower manhole conveying and carrying the same in suitable places as directed by deptl officers including cost of oil, carbolic soap, phenyle and hire charges for the bucket and other tools etc. complete

OD223653/2025-2026:Cleaning 225 to 250mm line with cleaning rod- <br>Cleaning the silt deposited inside the sewer line of 225 to 250mm dia with the help of sewer cleaning equipment and scrappers fitted in nylon wire inserted from one manhole to next removing floated matters and silt collected in the lower manhole conveying and carrying the same in suitable places as directed by deptl officers including cost of oil, carbolic soap, phenyle and hire charges for the bucket and other tools etc. complete

OD223656/2025-2026:Cleaning 300mm line with cleaning rod- <br>Cleaning the silt deposited inside the sewer line of 300mm dia with the help of sewer cleaning equipment and scrappers fitted in nylon wire inserted from one manhole to next removing floated matters and silt collected in the lower manhole conveying and carrying the same in suitable places as directed by deptl officers including cost of oil, carbolic soap, phenyle and hire charges for the bucket and other tools etc. complete

OD223659/2025-2026:Manhole cleaning above 3m depth- <br>Cleaning the manhole at main line and branches above 3m depth including removing the silt and other floated matters and destroying the debris at convenient places as directed by the departmental officers

OD223655/2025-2026:Manhole cleaning upto 3m depth- <br>Cleaning the manhole at main line and branches up to a depth of 3m including removing the silt and other floated matters and destroying the debries at convenient places as directed by deptl officers

100.7.1:Bailing out water with 5HP engine and pump set including conveyance to the site, erecting, dismantling and taking back of engine and pump, cost of fuel lubricating oil and other stores pay of staff etc., complete.

100.98.1008:Engaging Coolie.

100.98.1035:Engaging sewer man.

100.98.1030:Engaging Operator ( pile/ Special Machine).

OD223658/2025-2026: Removal of dumped earth, silt, deposits recieved from manhole etc by lorry for minimum mechanical conveyance and disposing

OD223662/2025-2026:Removal of dumped earth, silt, deposits recieved from manhole etc by lorry for minimum mechanical conveyance and disposing(Above 5km up to 10Km)

OD223661/2025-2026::Removing the CI or RCC manhole cover with frame (Heavy duty), after chipping the existing cement concrete and refixing the Cover after raising the manhole by 10cm with CC 1:2:4 as per specification.

OD223657/2025-2026::Removing the CI or RCC manhole cover with frame (Heavy duty), after chipping the existing cement concrete and re fixing the Cover after raising the manhole by 15cm to 24cm with CC 1:2:4 as per specification

Special Items

16.83:Taking out existing CC interlocking paver blocks from footpath/ central verge, including removal of rubbish etc., disposal of unserviceable material to the dumping ground, for which payment shall be made separately and stacking of serviceable material within 50 metre lead as per direction of Engineer-in-Charge.

OD223669/2025-2026:Laying 60 mm thick factory made cement concrete interlocking paver block of M - 30 grade made by block making machine with strong vibratory compaction, of approved size, design & shape, laid in required colour and pattern over and EXCLUDING 50 mm thick compacted bed of coarse sand, filling the joints with fine sand etc. all complete as per the direction of Engineer-in-charge

OD223670/2025-2026:supply of 60 mm thick factory made cement concrete interlocking paver block of M - 30 grade made by block making machine with strong vibratory compaction, of approved size, design & shape, in required colour and pattern etc. all complete as per the direction of Engineer-in-charge.

100.59.2:Refilling the trenches with a wet mix of close graded granular materials (Stone aggregate - 25mm nominal size - 17.5%, Stone aggregate - 10mm nominal size - 17.5%, Crushed Stone - 2.36mm to 12.5mm - 25%, Stone chippings / screenings - 4.75mm nominal size - 20%, Stone chippings / screenings - 150 micron nominal size - 20%), mixing properly after adding sufficient quantity of water, refilling in layers not exceeding 150mm, compacting properly at Optimum Moisture Content with Surface Plate Vibrator and disposing the excavated material etc. complete, including traffic control, providing caution boards and as per direction of Engineer-in-charge for road restoration works in pipeline leak sites.

100.59.3:Restoring the road surfaces by providing and laying factory made cold bitumen-aggregate pot-hole repair mix in two layers of 25mm thick (total 50mm thick), by cleaning the surface with brooms etc. to remove dust/debris/water etc, placing the premix, compacting properly with hand-rammer etc. complete, including traffic control, providing caution boards and as per direction of Engineer-in-charge for road restoration works in pipeline leak sites.

Personal Protective Equipments

OD223668/2025-2026:Supply of Personal Protective Equipments for workmen for a period of 6 months, including 1).Water proof Rubber /Neoprene gloves to avoid body contact with septage/ sewage - 6 pairs .(The gloves should be conforming to IS 15354;2003). 2) Liquid proof coveralls to avoid clothing / body contact with septage /sewage- 2 nos , 3) Protective face mask and splash- proof Face shield. to protect nose and mouth from splashes of septage/ sewage - 18 nos ( The face mask should conform to IS 14746:1999 Standers ), 4) Goggles:To protect eyes from splashes of septage / sewage into eyes - 2 nos. (The goggles should conform to IS 5983:1980 Standers), 5) Knee length Rubber Boots to avoid body contact with septage / sewage - 2 pairs . (The boots should conform to IS 3976: 2003 and IS 15298;2011 Standards), 6) Safety Helmet - 1 no. (The helmet should conform to IS 2925 Standards), 7) Reflective jacket - 2 nos

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