Construction of Recharge Pit with Sedimentation Pit at Agriculture Sub Depot, Gandhi Nagar in GNI.

Amount

Providing cement concrete surface drain including earthwork excavation 10 cm thick base concrete and 15 cm thick side wall 1:3:6 (1 cement : 3 Coarse sand : 6 Graded stone aggregate 40 mm nominal size) cement concrete finished with 1:4 (1 Cement : 4 Sand) a floating coat of neat cement inside the drain and its top exposed surface and disposal surplus earth etc. complete. a) 23 x 23 Cm

Construction of Cement Concrete Chamber 100 x 90. x 40 cm with 20 cm thick wall in 1:2:4 mix (1 cement : 2 caorse Sand : 4 graded stone aggregate 20mm nominal size) with open base and covered with 3" perforated precast RCC slab of mix 1: 1.5: 3 (1 cement : 1.5 Coarse Sand : 3 graded stone aggregate 20 mm nominal size) as per the direction of Engineer-in-charge.

Making recharge pit 2.5m diameter 2.3m deep filling with Ist layer of stone boulder 5-20 cm, 2nd layer of stone chips/gravel 5-10 cm and 3rd layer of coarse sand 1.5-2 mm of depth each layer 0.60 meter deep including earthwork excavation etc. s per the direction of Enginer-in-charge.