Maintenance of Taleigao Sewerage System including Routine inspection, removal of chokes, raising of manholes in Taleigao Constituency.

Detecting the Manhole location by metal detector and Raising manhole cover and frame slab to the required level including dismantling and demolishing disposing existing slab and making good the damage by reconstructing the R.C.C slab at desired level including fixing of frame and cover to the perfect fixing as required upto a depth of 20cms or part thereof.

Opening jammed manhole covers covered with asphalt due to constant plying of heavy vehicles to facilitate releasing of house Sewer connection,cleaning of manholes or sewer line as and when required as directed by Engineer-in-charges.

Identifying of choked in sewerlines between two consecutive manholes, cleaning & removal of all choked materials without excavating for pipes of sewer & disposal of unserviceable rubbish, dirty materials etc as directed within a lead of 3kms from work site, and restoration of sewers to functioning & flushing the sewers, including necessary dewatering, sewer cleaning, rodding and scavanging arrangements all complete within 8 hours from written instruction by Engineer-in-charge.

Pumping of sewage from upstream sewers to down stream to prevent overflows when sewer fails to function or when incase of major faults and when the line has to be rectified as directed by Engineer-in-charge, until rectification work is started.

Flushing and rodding the sewerlines to clear the chokes and removal of grit and silt so accumulated in manholes due to flushing and rodding outside and disposal to a distance of 5 km. including, providing necessary tool, rods flushing water tanker ladders safety equipment etc. complete.

Desilting the gritty and silt deposits from manholes including necessary arrangements for lifting the deposits taking out and disposal within 5 K.m.s. as directed by the Engineer-in-charge

Manhole upto 2.00m depth

Manhole upto 3.00m depth

Manhole of above 3.00m depth upto 6m depth.

Hiring of grabber including Driver, Diesel, oil labour etc.

Filling potholes and patch repairs with open graded premix material and removal of all failed material, trimming of completed excavation to provide firm vertical faces, cleaning of surface, painting of tack coat with bitumen emulsion @ 0.24 kg/sq.m on the sides and base of excavation as per Clause 503, back filling the pot-holes with hot bituminious content @ 1.46 kg/m2 as per clause 511, compacting trimming and finishing the surface average thickness of 50mm to form a smooth continous surface all as per MORTH Specification 3004.2

Hiring of Jetting cum suction machine for choked sewer line manholes including driver, diesel oil, operator, labour, suctioction, disposal of the sewage at nearby sewage treatment plant

Raising of Manhole including dismantling/demolishing carefully the existing manhole to the extent of conical portion constructed out of brick masonry and PCC 1:2:4 and reconstruction of the same manhole in first class brick masonry in cement morter 1:3 (1 cement 3 coarse sand) with bricks of class designation 125kg / cm2 so as to raise the total depth of manhole as mentioned below including necessary excavation pumping and bailing out of ground water if any, barricading and danger lighting regulating traffic if necessary and 12mm plastering for inside and outside surface with cement morter 1:3 (1 cement 3 coarse sand) finished with a coat of neat cement and reusing the same CI manhole frame, cover and footrest including fixing the footrest at 30cms c/c staggered in cement concrete 1:3:6 (1 cement 3 coarse sand 6 stonee aggregate of 20mm nominal size) block of size 20x20x35cm and manhole frame with 1:2:4 (1 cement 2 coarse sand 4 stonee aggregate of 20mm nominal size) correctly to match with given road surface level and disposal of unserviceable material, and providing soling and full grout over excavated trench portion all complete job as directed by Engineer-in-charge.........For 1.20m dia Manhole raised by 25cms

Raising of Manhole including dismantling/demolishing carefully the existing manhole to the extent of conical portion constructed out of brick masonry and PCC 1:2:4 and reconstruction of the same manhole in first class brick masonry in cement morter 1:3 (1 cement 3 coarse sand) with bricks of class designation 125kg / cm2 so as to raise the total depth of manhole as mentioned below including necessary excavation pumping and bailing out of ground water if any, barricading and danger lighting regulating traffic if necessary and 12mm plastering for inside and outside surface with cement morter 1:3 (1 cement 3 coarse sand) finished with a coat of neat cement and reusing the same CI manhole frame, cover and footrest including fixing the footrest at 30cms c/c staggered in cement concrete 1:3:6 (1 cement 3 coarse sand 6 stonee aggregate of 20mm nominal size) block of size 20x20x35cm and manhole frame with 1:2:4 (1 cement 2 coarse sand 4 stonee aggregate of 20mm nominal size) correctly to match with given road surface level and disposal of unserviceable material, and providing soling and full grout over excavated trench portion all complete job as directed by Engineer-in-charge ..... For 1.50m dia Manhole raised by 25cms

Supply , Installation, commisioning of non clog cutter sewage submersibble sewage pump of Kishore /Aqua/ Kirloskar or equivalent make provided with Duet foot, auto coupling, 3" Hose outlet designed to deliver a rated discharge of against a total head o f 5 mts with solid (in suspension) handling capacity upto 86 mm(min.), 3.70 KW (5.00HP) rating, provided with in-thermal protection, suitable to operate on 415V/3phase/50Hz/AC. Supplied complete with 25.00 meters of cables suitble for DOL starter as per approval of engineer in charge

Operation & Maintenace of Pumping Station Near Hotel Cresent including, pumping,suppy or reapir of electromechanical equipments, diesel, labour, operator,etc and as directed by engineer in charge necessary for smooth fuctioning of plant

Rehabilitation & Grouting of old Manhole for required level: (I) Drilling of 12 to 14mm dia holes in the concrete wall 150mm C C & 100mm deep in the walls and the junction or equivalent. (II) Injecting with low Viscosity. Injection Rasco Flex 110X EN/RascoFlex 110EX & Will Stop 1C is a slow-hardening, rigid, two. component injection resin based on polyurethane/ for water proofing and stabilization of water bearing structures. in to the packers from out side the pool junction to seal the cavities with grouting and mechanical plugging or equivalent. (III) Open the joints on the junctions of the walls, remove all loose particales clean it with water for any dust etc, applyHighb performance, Hydrophobic, waterproof, Non-Sag.Cohesive, WaterRetentive, breathable,Drying Cementitious Premixed plaster SS-HydroNil PM & SS Quick stop super in to the joints with line and level or equivalent. (IV) Repointing the masonry and applying a 5mm thick lining of a Mineral Based, Waterproof, Surface Protection System for Sewage Lines and Manholes, Stormwater,Potable Water, Dams and Marine Infrastructures such as Tri-Sewcoat. Tri-Sewcoat is a component, waterproof and protective coating / lining mortar system consisting of a mineral based powder, Tri-Sewcoat and a Liquid Additive, Tri-Bond SBI The combined system forms a lining that is resistant to aggressive environments and can withstand extreme pH, chloride, and sulphate / chloride loading (e.g., seawater) and Biogenic Sulphuric Acid Concrete Corrosion (H2S Attack) or equivalent.

Supply installation of rectangular D.I manhole cover and frame as per EN-124 standards at the site of work Size - 600mm x 900mm Class B - 125 Grade - MD Weight - 105Kg and dismantelling of FRP cover Size - 600 x 900 mm Rectangle

Supply, installation of heavy duty solid type circular type manhole cover and frame for use under heavy traffic conditions as per IS:1726 Part V-1974 having size d. 600mm dia with weight not less than 290kg

As per Circular No.3-3-05/SSW-PWD/Vol-I/2022-23/391 Dt.13/03/2023 for Adoption of percentage increase in rates for working of sewerage works under unhygenic conditions - 10% of item no. 1-15 above

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