Construction of Gravel Packed Production Tube Well at GC Srinagar at CRPF Campus Humhama Srianagar

Drilling/boring of bore hole of 450–550 mm dia for lowering of 250 mm dia for casing/strainer pipe by suitable method prescribed in IS: 2800 (Part 1), including collecting samples from different strata, preparing and submitting strata chart/bore log, including hire and running charges of all equipment, tools and machineries required for the job, all complete as per direction of Engineer-in-charge up to 90 m depth below ground. All kinds of soil (Diameter of casing/strainer pipe = 250 mm).

Drilling/boring of bore hole of 450–550 mm dia for lowering of 250 mm dia for casing/strainer pipe by suitable method prescribed in IS: 2800 (Part 1), including collecting samples from different strata, preparing and submitting strata chart/bore log, including hire and running charges of all equipment, tools and machineries required for the job, all complete as per direction of Engineer-in-charge beyond 90 m and up to 150 m depth below ground. All kinds of soil (Diameter of casing/strainer pipe = 250 mm).

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 250 mm dia, conforming to IS: 4270 of reputed and approved make, including painting the outside surface with two coats of anticorrosive paint of approved brand and manufacture, including required hire and labour charges, fittings and accessories, all complete for all depths as per direction of Engineer-in-charge. 250 mm nominal dia having minimum wall thickness of 5.4 mm.

Supplying, assembling, lowering and fixing in vertical position in bore well, ERW (Electric resistance welded) Fe 410 plain slotted (having slot size 1.6/3.2 mm) mild steel threaded and socketed/plain bevel ended pipes (type A) of required dia, conforming to IS: 8110 of reputed and approved make having wall thickness not less than 5.4 mm, including painted with outside surface with two coats of anticorrosive bitumastic paint of approved brand and manufacture including required hire and labour charges, fitting and accessories, all complete for all depths as per direction of Engineer-in-charge. 250 mm nominal size dia.

Gravel packing in tube well construction in accordance with IS: 4097, including providing gravel fine/medium/coarse in required grading and sizes as per actual requirement all complete as per direction of Engineer-in-charge.

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 and draw down etc. by step draw down method, collecting water samples and getting tested in approved laboratory all complete including required hire and labour charges of air compressor, tools and accessories etc. all as per direction of Engineer-in-charge.