Construction of re-cahrge pit for RWH at GPS Minnie Bay

Amount

Providing cement concrete surface drain including earth work in excavation 10cm thick base concrete and 23 cm thick side walling with 1:3:6(1 cement 3 sand:6graded stone agg. 40mm nominal size) finishing with 1:4(1cement :4 sand ) including floating coat of neat cemetn including drain and its top and exposed surface including earthwork in excavation and disposal of surplus earth etc., complete

Construction of cement concrete Chamber 100x90x40 cm with 20 cm thick wall in 1:2:4 mix (1 cement : 2 coarse sand : 4 graded stone aggregate 12.5 mm nominal size ) with open base and covered with perforated reinforced cement concrete slab 1:1.5:3 mix (1 cement : 1.5 coarse sand : 3 graded stone aggregate 12.5 mm nominal size ) complete as per standard design.

Making recharge pit 2.5 m diameter 2.3 metre deep filling with 1st layer of stone boulder 5-20 cm, 2 nd layer of Gravels 5-10 mm and 3 rd layer of course sand 1.5-2 mm of depth each layer 0.60Mtr. deep i/c earth work excavation etc as per the direction of Engineer Incharge.

Providing and laying in position cement concrete of specified grade excluding the cost of centering and shuttering - All work up to plinth level :

1:3:6 (1 Cement : 3 coarse sand (zone-III) derived from natural sources: 6 graded stone aggregate 20 mm nominal size derived from natural sources).