Construction of Production Tube Well Putshahi Degree College, District Bandipora.

Amount

PART A (ODEX) Drilling of a 200/250 mm dia Bore hole with ODEX attachment in all kind of Soils, Boulders, Hard-rock, saturated Soils, the drilling includes the cost of suitable casing Shoe, all consumables, water, fuel, lubricants and other accessories complete in all respect. The job includes Lowering of departmentally supplied well assembly i.e the screen and blind M.S pipes of 250/200mm diameter. As per the drawing issued by the site Engineers in accordance with the soil strata and the departmental requirement. (Screen/casing pipes shall be provided by the department FOR stores). The job includes the cost of face to face welding of casing assembly along the beveled edges/areas and strengthening of welding joints by additional ribs/supports to ensure the stout welding joint. The job includes the cost of pointed bail plug required to be fabricated and fitted at the bottom of the well assembly.

Development of tube well with back wash method with Air Compressor of minimum capacity 1000CFM (300 PSI air delivery system) with pumping pipe of minimum 100 mm dia. and air line of minimum 65 mm dia till well is thoroughly developed as per clause 4.2 of IS 11189 code 1985 with up to date amendments if any complete in all respects as per the direction of the Engineer in charge, for a minimum period of at least 40 hours. b) Development of tube well be continuous over pumping method with the submersible pump of suitable capacity not less than double the discharge established by the compressor. free of all sediments as per IS 11189 code 1985 with up to date amendments if any, for a minimum period of at least 30 hours. the draw down and the discharge to be established by running the pump continuously for 8houres in presence of the officer of the department not less than the rank of AEE. The complete well thus constructed is to be handed over to the territorial mechanical division for harnessing. Completion of test for yield to ensure that the quality of water is as laid down in IS-10500; 1983. the grouting & sealing of the tube well needs to be done to ensure safe sanitary conditions as per IS-2800; 1991. An apron around the well (mix shall be M10 grade) & slopping away from it to protect the well from pollution has to be constructed to prevent contaminated water flowing back into it. the casing pipe is to be anchored within the apron by welding ISMC-150 steel bracing with crates & sufficient welding area 2 mtr length each bracing embedded within the apron (4 bracing). the complete well thus constructed is to be handed over to the territorial mechanical division for harnessing. i. Apron Size= 2.5 mtr × 2.5 mtr. ii. Apron depth at skirt = 300 mm. iii. Apron depth at well casing= 350 mm.

M/S ATTAR BROTHERS