Department Of Agriculture Tender

Construction of 125mm dia machine drill community based Borewell and supply, installation, testing and commissioning of submersible pumping equipment along with required accessories at Shankera Pora Dooru NLO Gh. Nabi Wani and others

Drilling of 125mm dia water well in collapsible strata, conglomerate, Boulder, Gravel, Pebbles, Silt, Clay, Rock, Whatsoever formation encountered, using 115mm dia. ODEX/DTH method and exploration of Ground Water by tapping sufficient aquifer Zones below ground level with simultaneous lowering of 125mm dia. M.S plain ended pipe duly chamfered/ bevelled and welding face to face, the job includes all charges on account of shifting of drilling accessories, tools, attachment, bits, drilling foam, water hauling arrangements POLS, consumable, both skilled and unskilled labourers reqd. The job includes the cost of casing driving shoes of adequate hardness, BHN suitable for all strata. It also includes the cost of development of well with suitable air compressor to clean the tapped water from all suspended impurities. The job includes the cost of slotting and lowering of the requisite casings up to the drilled depth. The specifications of the bore well shall be as under; • Min. dia of the each bore well …… 125 mm • Dia. of MS pipe to be used …… 125 mm • Class of pipe …… “C” Class confirming to IS:1239 (Part-I)-2004, Equivalent to BS-1387/1985 • Sample collection of strata to be collected for examination …………. After every 10 ft. • Drilling/ boring method to be used…. Air Rotary (preferably) Job also includes, providing, fitting and lowering of 125 mm Dia (Nominal) MS Casing Pipe. The Pipe shall be plane and bevelled ended. The pipe shall be lowered up to the desired level BGL. The average length of each pipe shall not exceed 3.00 Mts. The welding electrodes used for welding the pipe shall confirm to relevant IS codes.

Providing and laying of circular cement block of 1.5 m dia and 0.3 m (1ft) deep in a mix of 1:3: 6 to adequate the strength to act as sanitary block for the well , in order to make it robust to resist shock load observed while pumping . The block comprises of mud mat of 4 inch height and then laying of 8 inch cement concrete with suitable drainage