Anti-erosion measures to protect D/S area of Tangabari village from the erosion of river Jilling for the year 2025-26

Amount

Light Jungles: Clearing light jungles and trees up to 15 cm. girth including cutting, uprooting roots and stumps, removing them from the site of the work up to a distance of 30 m, etc. complete as directed. (When 30% of the area is covered by shrubs, trees etc.)

Collection of river boulder of size 23 cm to 30 cm in average and minimum weight 30 Kg having i. Specific gravity not less than 2.65,ii. Aggregate Chrushing < 30% (Wearing) & < 45% (Non - wearing) iii. Impact Value (%) max < 30% (Wearing) & < 45% (Non - wearing) andiv. Abrasion Value (%) < 30% (Wearing) & < 50% (Non - wearing)(Materials conforming to IS 2386 part III & IV 1963) free from dust, dirt and other foreign materials including necessary carriage and stacking in regular measurable stacks at site, monopoly, etc. complete as directed.(10% under sized (not less than 10 cm) boulder is allowable for packing/filling the gaps occurred during execution of works) Complete as directed.(15% deduction will be made from the stack measured quantities on ccount of void).

Supply of Galvanized Wire Netting Sheet made of 8 SWG wire 152 mm square mesh in sheet 2.57 m × 1.66 m with longitudinal wire at 152 mm centre and 76 mm projection of each wire on all sides beyond the net size of 2.42 m × 1.5 m having knots of 12 SWG at every joints, weight of each sheet should not be less than 6.3 Kg/sheet.

Hexagonal Wire Netting Roll made of 8 SWG wire triply twisted 152mm mesh of size 15.24m x 3.66m longitudinal. Weight of each roll should not be less than 83 Kg/Roll

Labour charge for dumping boulder in sausage made of hexagonal wire netting rolls of size (15.24x3.66)m (supplied by the department. free of cost) cutting the netting as required making the sausage by tying the projected ends with 8G wire including supplying & tying the wire at every joint after filling the sausage with boulders properly and launching in places handling charges including site carriage of boulder from stack yard/ dump site within a distance of 150 m.etc. complete as directed. (Wire netting sheets to be supplied by the Department free of cost).

Labour charge for dumping boulder in cage made of wire netting sheets of size 2.57x1.66m of 8G galvanized wire making the cage from 2 nos. of wire netting sheet by tying the projected wires filling boulder inside in cage launching the same in position as directed including all handling charges and including site carriage of boulder from stack yard/ dump site within a distance of 150 m.etc. complete as directed. (Wire netting sheets to be supplied by the Department free of cost).i) Without boat.

Earth work in embankment by mechanical means by truck carriage in ordinarry/normal soil excluding sandy and rocky soil free from roots & vegetation and stacking in regular measurable stacks at suitable places including clearing debris, breaking clods upto 4cm cube, excluding payment of forest royalty if any etc. (12.50% deduction will be made from measured quantities on account of shrinkage).(For initial lift upto 1.00 Km and for all lifts).

Spreading of earth stacks over the crest and slope of embankment and places as directed in uniform layer of 22 cm. thick including breaking clods, dressing, ramming etc. complete where necessary including dressing the embankment. before complete as directed.

SRI BIBEKANANDA DEY (BID ID -275637)

Sri Bimal Boro (BID ID -275632)