Details: drilling work construction of tube well after completion of drilling by rotary /percussion method & upto 100 mtr. depth in all type of rocks by dth system as per is:2800 part 1: 1991 and is:2800 part ii: 1979 (both amended upto date) and technical specifications. the work shall be deemed completed only after obtaining sand free water. the bore well should have a throughout nominal size bore beyond casing pipe. nominal bore 200 mm dia. (phed 2021/2.3.2) add 15% extra on above item for drilling depth beyond 100 mtr and up to 200 mtr from ground level, rate shall be applicable for only extra depth beyond 100 mtr and up to 200 mtr. . (phed 2021/2.3.3) add 30% extra on above item for drilling depth beyond 200 mtr and from ground level, rate shall be applicable for only extra depth beyond 200 mtr .(phed 2021/2.3.4) construction of tube well from ground level and up to 100 mtr depth and above to accommodate housing assembly pipe in all type of unconsolidated formation such as pebble
Sector: Water supply and Sewerage