Anti-erosion measures to protect Chirabund from the erosion of river Sonkosh under S.O.P.D. BTC

Amount

Item : Collection of river boulder of size 23cm to 30cm in average and minimum Weight 30 Kg having (i) specific gravity not less than 2.65 and Materials properties 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, payment of forest royalty, monopoly, etc. (10% under sized 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 account of void).

Supply of Galvd. Hexagonal wire netting Roll 152mm (6”) mesh of size 15.24m x 3.66 (50' x 12') longitudinal wire at 152mm (6'') center made of 8BGW wire triply twiste including loading and, unloading and stacking etc, complete as directed by the department (weight of each roll should not be less than 6.30 Kg.)

Supply of Galvd. wire netting sheets made of 8G. wire of 152mm (6”) square mesh in sheet of overall size 2.57 x 1.66m including 76mm projection of each wire on all sides beyond the net size of 2.42m x 1.50m having knots of 12G wire at every joints including loading, unloading and stacking properly complete as directed by the department (weight of each sheet should not be less than 6.30 Kg.)

Earth work in embankment by Tractor-trailer carriage in locally available ordinary soil excluding rocky soil free from roots & vegetation and filling in uniform layers not exceeding 22 cm. thick including cutting and clearing light jungles trees up to 50cm. girth ploughing or roughening or benching the seats, removing all debris, breaking clods up to 2.5 cm cube, dressing as per design section including payment of forest royalty if any, etc. complete as directed. (10% deduction will be made from the section measured quantities of the completed and compacted earth work on account of shrinkage)

Local carriage of boulder, metal, gravel etc. from the approachable site beyond 150m and up to 3.00Km from the work site including loading from stack and unloading at work site with 10 (ten) ton capacity truck, supplying P.O.L. etc. complete as directed.

Labour charge for dumping boulder in sausage made of hexagonal wire netting rolls of size (15.24 x 3.66) 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 boulder properly and lanching in places handling chages incluing site carriage of boulder from stack yard dump site with a distance of 150m etc. complete as directed.

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 (wire netting sheet supplied by the department free of cost within 150m of work site) 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 150m. etc. complete as directed.

Labour charge for laying and pitching boulder of 23 cm to 30cm size ( man size) including dressing the seat, ramming to proper size & slope, properly hand packed including site carriage of boulder from stacks within a distance of 150m etc. complete as directed..

Turfing with grass sods of largest possible rectangles of 12 cm. minimum thicknesses placed closely including dressing earth pegging with Jati bamboo split, watering till the grass grows for a lead up to 90m and all lifts

Kornoliush Basumatary