material supply to gp jainpurwas material supply to gp jainpurwas , construction of tubewell 200mm dia from ground levels and up to 150mtr depth and above to accommodate housing and assembly pipe in all type of alluvium strata, unconsolidated formation such as pebbles, bouldersetc by percussion / rotary drilling method having minimum bore size of 445 mm and with gravel and packing as per is:2800 ( part-1& part-ii ) 1979 as amended up to date. with supply of bail plug if necessary. the work will not include cost of housing pipe and stainer pipe assembly cost, gravel and development work. work would be deemed completed only after obtaining sand free water during pumping , construction of tubewell 150mm dia from ground levels and up to 150mtr depth and above to accommodate housing and assembly pipe in all type of alluvium strata, unconsolidated formation such as pebbles, bouldersetc by percussion / rotary drilling method having minimum bore size of 445 mm and with gravel and packing as per is:2800 ( part-1& part-ii ) 1979 as amended up to date. with supply of bail plug if necessary. the work will not include cost of housing pipe and stainer pipe assembly cost, gravel and development work. work would be deemed completed only after obtaining sand free water during pumping , supply of erw ms black casing pipe of 1500mm nominal bore &5.4mm thickness conforming is:4270 / 2001 of grade fe410