WBMAD 96 (DEV/15TH F.C./KM)2025-2026

Labour for boring tube well of required dia. by water jet system through any type of soil strata including hire and labour charges for boring pipes, scaffolding, tools and plants as necessary and taking out them and lowering pipes, strainers, blind pipe etc. and fitting and fixing the same complete including bucket washing and other incidental works in the connection. The tube well should have a minimum 50 mm gap in between the outside of the tubewell pipe and the bore. [P- 49, It - I/d/i&ii] (a) For depth upto 150 metre for 50mm dia tube well with top enlargement of 100 mm dia. ii) 50mm dia boring etc.

ii) 100mm dia boring etc.

Supplying, fitting and fixing steel cutter piece upto 450 mm long with sockets. [P - 53, It-9/ii ] (i) 50 mm dia.

Supply of PVC pipes & fittings Schedule 80 (medium duty) conforming to ASTMD - 1785 and threaded to match with GI Pipes as per IS : 1239 (Part - I). [P- 18, It-19(iii)/L] a) Reducing Socket- i) 100 x 40mm

Supplying PVC strainer of approved make with adapter conforming to I.S.12818 specifications. (i) 40 mm dia. [Page- 52/6]

Supplying , fitting and fixing of 100mm dia M.S. Housing clamp of M.S. Plate 25mm width and 20mm thick with arms extended on both sides upto 0.30m lenth (each side) with drilled holes on both sides for insertion of total 4 nos M.S nuts & bolts of 75x20mm dia size with M.S washers etc complete a) 100mm dia.

Supply of PVC pipes & fittings Schedule 80 (medium duty) conforming to ASTMD - 1785 and threaded to match with GI Pipes as per IS : 1239 (Part - I). [Page - 14, It- 19(iii)- A)] i) 50mm dia

ii) 100mm dia

Supply of G. I. pipes of TATA make including necessary sockets. [ Page- 102, It-1(i)-ii] i) 100 mm dia (Heavy Quality)

Packing the annular space between the outside of the tube well pipes & strainers and the bore with pea size washed gravel of approved quality having size from 2 mm to 5 mm or the size approved by the Engineer-incharge including cost of all materials labour and equipment complete. [P- 55, It-24]

Packing annular space between the outside of the housing pipe and the bore with puddled clay balls of approved size as per direction of the Engineer-in-charge with cost of all materials and labour complete. [page - 56, It-25]

Washing & developing Tubewell with air compressor pump has to be run till sand free water is obtained.

Supply & delivery at site submersible pumping mach intery directly coupled with wet witding type suitable size submersible motor having the following specification make crompton/KSB/Kiloskor with ISI mark 1.0/2.0 HP motor submersible type phase 50Hz A.C 220 volt 10% RPM 2900 winding wet type shalf stainery steel including 50mtr necessary cable with suitable stater. Test certificate along with the chateristic curve should be submitted at the time of delivery of the pump motor assembly set.

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