tender for tube well construction kalera bas, gusaisar bada - construction of tube-well from ground levels and upto 100 meter depth to accommodate housing and assembly pipe in all types of alluvium strata unconsolidated formation such as pebbles, boulders etc. by percussion/rotary drilling method as per is:2800 part 1:1991 and is:2800 part ii: 1979 (both amended up to date) and technical specifications for removal of overburden. the work includes the cost of lowering of casing pipe, but excludes the cost of casing pipe. nominal bore 250 mm dia 2 construcion of tube well after completion of drilling by rotary/percussion method & up to 100 mtr. depth in all types of rocks by dth system as per is:2800 part 1 : 1991 and is:2800 part ii : 1979 (both amended up to date) and technical specification. the work shall be deemed completed only after obtaining sand free water. the bore well sould have a throughout nominal size bore beyond casing pipe. nominal bore 200 mm dia 3 supply of erw m.s. black casing pipe isi marked (is 4270/1992) of grade fe 410 of followiing sized at site of work200 mm dia nominal bore5.4 mm thick (as per pwd bsr 5.3) 4 development of tube well having depth up to 250 mtr. as per is : 11189-1985 and is:2800 (part-1) 1991 (both amended up to date) using suitable methods to give sand free water for required yeild of the gravel packed tube well. 5 ms cover and display board