PROVISION OF TWO BOREWELL ALONGWITH RAINWATER HARVESTING AT HANSA VIHAR AT INS HANSA UNDER AGE EM I OF GE NW VASCO

M&L for carryout hydrological investigation for water supply / feasibility report of three locations by the contractor near TU hangar for finding out maximum yield of underground water table at proposed site through ground water board of state and submit the report duly marked location of investigated areas where yield of water is highest before digging the bore on site all as specified and directed by the Engineer-in-Charge.

Excavation in trenches 1.5 Mtr wide and not exc 1.5 Mtr deep in hard/dense soil getting out and leveling of bottom surface to required level complete all as specified.

Returning filling in, including spreading, leveling, watering and well ramming in layers not exc 25cm thick complete all as specified and directed.

Removing excavated material of soils from site to a distance not exc 50 mtr away and depositing where directed not exc 1.5mtr from the starting point complete all as specified and directed.

Supply and laying Double walled corrugated pipe (DWC) confirming to IS 14930 heavy duty 77/63 mm bore for cable protection as a guard pipe including required accessories etc complete as specified and directed.

M&L for Trial bore of 200 mm dia upto 200 mtr depth below ground level in any kind of soil strata including hard stone /boulder etc all as specified and directed by Engr-in-charge. Note:- Two trail of bore will be measured.

M&L for development of trial bore by reaming-up upto 200/250 mm for 60 RM from ground level including casing pipe of 200 mm dia and diagonal thickness of 8 mm and pea gravel all as specified and directed by Engr-in-charge.

M & L for fixing of MS reducer, bail plug, well cap, MS strip for centring, MS iron clamp, electric logging and sample strata box including 100 mm PCC 1:3:6 type C-1 using 20 mm graded stone aggregate around the bore well minimum 2 m radius complete all as specified and as directed by Engr-in-charge.