Drilling of bore wells and installation of casing and submersible pumps at Balutar colony, Teesta-V Power Station.

Amount

Drilling of bore well, by using heavy duty hydraulic power ring and air compressor for drilling 02 Nos. 8’’ dia. tube wells by ODEX 165 method of drilling through any kind of soil, boulders and rock up to desire depth including hiring and running charges of machineries, equipment and cost of labour, fuels/ Lubricants etc. as a required welding casing pipe and casing shoes etc.

Supplying, assembling, lowering and fixing in vertical position in bore well, ERW (Electric Resistance Welded) FE 410 mild steel screwed and socketed/ plain ended casing pipes of required dia., conforming to IS: 4270, of reputed & approved make, including painted with outside surface with two coats of anticorrosive paint of approved brand and manufacture, including required hire & labour charges, fittings & accessories, all complete, for all depths, as per direction-of Engineer-in-charge. 200 mm nominal size dia. having minimum wall thickness 5.40 mm.

Supplying, assembling, lowering and fixing in vertical position in bore well, ERW (Electric Resistance Welded) FE 410 plain slotted (having slot of size 1.6/3.2 mm) mild steel threaded and socketed/ plain bevel ended pipe (type A) of required dia., conforming to IS: 8110, of reputed and approved make, having wall thickness not less than 5.40 mm, including painted with outside surface with two coats of anticorrosive bitumstic paint of approved brand and manufacture, including hire & labour charges, fittings & accessories, all complete, for all depths, as per direction of Engineer -in-charge. 200 mm nominal size dia.

Supplying, assembling lowering of LCG (low carbon galvanized) strainer 150mm dia. including packer.

Development of tube well in accordance with IS : 2800 (part I) and IS: 11189, to establish maximum rate of usable water yield without sand content (beyond permissible limit), with required capacity air compressor, running the compressor for required time till well is fully developed, measuring yield of well by 'V" notch method or any other approved method, measuring static level & draw down etc. by step draw down method, collecting water samples & getting tested in approved laboratory, i/c disinfection of tube well, all complete, including hire & labour charges of air compressor, tools & accessories etc., all as per requirement and direction of Engineer-in-charge.

Providing and fixing suitable size threaded mild steel cap or spot welded plate to the top of bore well housing/ casing pipe, removable as per requirement, all complete for bore well of : 200 mm dia.

Providing and fixing M.S. clamp of required dia. to the top of casing/housing pipe of tube well as per IS: 2800 (part I), including necessary bolts & nuts of required size complete : 200 mm clamp.

Providing and fixing Bail plug/ Bottom plug of required dia. to the bottom of pipe assembly of tube well as per IS : 2800 (part I). : 200 mm dia.

Providing, Fitting and fixing GI pipe (HEAVY DUTY), (excluding trenching, refilling, compacting and the cost of fittings) all complete : 80 mm dia. G I pipe.

Providing, Fitting and installation of 25HP submersible pump (KSP make model BPD302/10) with L&T make control panel with starter of required specification at bore well all complete.

Providing and fixing gun metal gate valve with C.I. wheel of approved quality (screwed end) : 80 mm nominal bore.