Construction of Machine Drilled open Bore well with 300 mm dia casing pipe in J and K Public Service Commission at Srinagar.

Drilling/Boring of 600mm dia. Open Bore well as per specifications laid down in IS 2800 (Part-II) with upto date amendments encountered. The job is to be done in all kinds of soils, boulder, rocks, collapsible strata, saturated soils, artisan conditions by Direct rotary drilling methods and exploration of ground water by tapping sufficient aquifer zones. The job includes cost for shifting of drilling accessories, tools, bits, casing shoe, consumables like fuel, lubricants, skilled and unskilled labours and other unforeseen items. (The drilling depth may increase or decrease at the time of execution subject to physical conditions).

Supplying, assembling, lowering and fixing in vertical position in bore well, ERW (Electric Resistance Welded) FE 410 mild steel plain bevel ended casing pipes of 300mm nominal Bore, conforming to IS: 4270-2001 with latest amendments, of reputed & approved make, the outside surface shall be painted with two coats, of anticorrosive bitumastic paint of approved brand and manufacture including required hire & labour charges, fitting and accessories, all complete for all depths, as per direction of Engineer-in-charge. (The length of the casing pipe may increase or decrease at the time of execution of work).

Supplying, assembling, lowering and fixing in vertical position in bore well, ERW (Electric Resistance Welded) FE 410 MS bevel ended slotted Pipes (having slot size 1.6/3.5 mm) of 300 nominal Bore, conforming to IS:8110-2000 with latest amendments, of reputed & approved make. The outside surface of the pipe shall be painted 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. (The length of the casing pipe may increase or decrease at the time of execution of work)

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. Size of pea gravel : 1.6 to 4.8mm Grade: B Fine Gravel Pea gravel supplied shall be thoroughly washed, graded, screened and stacked properly on a clean surface at site.

Providing/Laying of Plain Cement Concrete block of size 4ft×4ft×1ft in 1:3:6 mix to give adequate strength to act as a sanitary block for the well. The job shall include anchoring the casing pipe by ISMC 80mm, 6mm thick, to be cut in sections of 01meter long (02nos) & 0.25m long (02nos), cutting & joining with the help of arc welding as per direction of Engineer in-charge.

Harnessing and yield test of the tube well by way of shifting machinery to site including DG set, submersible pumping unit, Tripod for lowering and uplifting of pumping unit along with column pipes and all other necessary tools and tackles required for completion of the job in accordance with IS:2800 (Part-I&II) to establish maximum rate of usable water yield free from sand and chemical contents by installing a test pump (submersible pumping unit suitable for the bore well). The pumping operation of well shall be continued till the measuring yield is achieved not less then 1000 GPH by step draw down method and collecting the water sample and shall be tested in central laboratory, all complete. The job also includes Development of Tube well with backwash method with air compressor unit of required capacity with suitable arrangements till well is thoroughly developed in all respects as per the directions of site engineer.