Construction of Borewell in Asham in District Bandipora.

Drilling of 125 mm dia machine drilled bore wells by way of drilling/ boring of 125 mm diameter tube well by air rotary drilling rig, suitable for lowering of MS casing of 125 mm diameter in suitably drilled bore hole as per specifications laid down in IS 2800 (Part I & II) with up-to-date amendments. The job is to be done in all kinds of soils, boulders, rocks, collapsible strata, saturated soils and artisan conditions by ODEX/DTH attachments and exploration of ground water by tapping sufficient aquifer zones. The job includes the cost shifting of drilling accessories, tools, bits, casing shoe, consumables like fuel, lubricants, skilled and unskilled labours and other unforeseen items. Development of tube well with backwash method with air compressor of minimum capacity 1000 CFM (300 PSI air delivery system) with suitable arrangements till well is thoroughly developed in all respects as per the directions of site engineer.

Supply, providing, fitting and assembling in vertical position in above drilled bore of Mild Steel plain and beveled ended 125 mm dia (Class B) casing pipes as per IS 4270 and subsequent lowering of casing assembly and its welding after every 10 feet up to the drilled/desired depth. The whole casing pipe is inclusive of slotted pipe / flushed pipe, which is to be used as per site requirement and as directed by the site engineer. The pipe shall be lowered up to the desired level below ground level (BGL). The average length of each pipe shall not exceed 3.00 meters. The welding electrodes used for welding the pipe shall conform to relevant IS codes. The specifications of the tube well shall be as per IS 2800 Part I & II.

Providing and laying of cement concrete block of 4 × 4 feet size and 0.3 m (1 ft) deep in a mix of 1:3:6 to adequate strength to act as sanitary block for the well. The block comprises of mud mat of 4 inch height and then laying of 8 inch cement concrete to give aesthetically good appearance. Cost on account of shuttering, strutting, centering, curing etc. is included in the scope of work. In case the suitable space for the above specification is not available, the surface area is to be adjusted accordingly.