Construction of Road side rain water harvesting system (with 3 years O and M) at Surajmal Colony, Alwar NIT 44/2025-26/Item3

Construction of tube-well from ground levels and upto 100 Meter depth and above to accommodate housing and assembly pipe of following sizes in all types of alluvium strata by percussion/ rotary drilling method and with gravel as per IS:4097-1967 and packing as per IS:2800 (Part I -& II) 1979 as amended upto date (the work includes the cost of gravel & its primary packing and packing during development, lowering of housing & strainer assembly pipes, with supply and wrapping of coir-rope, wherever necessary, for arresting fine sand particles. The work will not include cost of housing pipe and strainer pipe assembly and development work, but work would be completed after obtaining sand free water)..250 mm Nominal bore.

250 mm Nominal bore.

Supply and lowering vent air pipe 63mm dia rigid PVC pipe(IS 4985) mark class II (4kg per cm2 ) with required all necessary fittings including perforation of 3 to 5 mm size all around the pipe at a distance of 180 to 220mm in zig zag fashion and making air vent at top complete as per direction of Engineer incharge.

Supply & lying River-gravels of following sizes in recharge shaft, filter pit after screening & washing from kachha shift without deduction of voids

Size 9 to 12 mm

Size 3 to 5 mm

Supply & laying of clean, clear sharp river sand of size 1 to 2mm coarse, without deduction of voids.

Construction of Recharge Shaft in filter pit including Earth work Excavation , lifting excavted earth with all lift and 50 m lead and centering & shuttering evenever required.

Diameter 900 mm

Supply & fixing Pre-cast RCC Rinngs at the mouth of recharge shaft of M20 mix with 40 mm thickness