Details: geophysical survey charges drilling of borewell in alluvial soil starta of clay and sand stone, shale, pebbles, boulders etc., by first taking and pilot bore of 140mm/150mm/200mm dia and then enlarging to required dia by direct or reverse rotary mud circulation method, using contractor's ridg fuel labour drilling at the site shown by the department officers including construction of mud pit and transportation (water available within a lead of 1.5k.m) using rotary rig. drilling of 140/150mm pilot bore upto 60m.depth ending below ground level drilling of 140/150mm pilot bore from 60m and upto 90m depth ending from g.l. drilling of 140/150mm pilot bore from 90m and upto 120m depth ending from g.l. drilling of 140/150mm pilot bore from 120m and upto 150m depth ending from g.l. drilling of 140/150mm pilot bore from 150m and upto 180m depth ending from g.l. drilling of 140/150mm pilot bore from 180m and upto 210m depth ending from g.l. drilling of 140/150mm pilot bore from 180m and
Sector: RDPR