Immediate measures for flood damage restoration work at downstream of Dhunarighat from Hamara to Chenimoraghat on R/B of river Subansiri under SDRF for 2019-20

Amount

Earth work in embankment by truck carriage in locally available ordinary soil excluding rocky soil free from roots & vegetation and filling in uniform layers not exceeding 22cm. 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 2.5cm 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 section earth work on account of shrinkage) For initial lead beyond ½ Km and up to 4.00 Km and for all lifts

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

Supplying and launching of bamboo cribs fabricated out in pyramid shape out of matured Bholuka bamboo 75mm to 100mm dia complete with all the branches and foliages with apex point at 7.00m from the bottom. At 0.60 m above the base of 1st row of horizontal stiffeners of size 4.00m x 3.00m are to be provided along with to Nos. of cross struts. A second set of horizontal stiffeners along with cross stiffeners similar to the 1st set are provided at height of 4.00m from the bottom. One set of cross bracing are to be provided in each face in between the 1st and 2nd horizontal stiffeners. All the stiffeners and inclined members are to be projected 0.30m beyond the longitudinal members. All the points are to be pinned with 22 Cm long patent nails and protruding end is to be bent properly to have a firm grip and the apex point is also to be clustered with 8 G. wire. All the members are to be punched with chisel or auger. The cribs are to be weighted with 25 Nos. of earth filled polythene empty cement bags in all corners and middle of 1st and 2nd row of horizontal stiffeners of the cribs, tied firmly with 8 G galvanised wire complete as directed. (Polythene bags, 8G. wire, bamboo pegs , wire rope, U-Bolt etc. will be supplied by the department free of cost.)(Using Bhaluka Bamboo at the rate of 14.00 nos / Rm) Construction of Crib

Supplying and launching of bamboo cribs fabricated out in pyramid shape out of matured Bholuka bamboo 75mm to 100mm dia complete with all the branches and foliages with apex point at 7.00m from the bottom. At 0.60 m above the base of 1st row of horizontal stiffeners of size 4.00m x 3.00m are to be provided along with to Nos. of cross struts. A second set of horizontal stiffeners along with cross stiffeners similar to the 1st set are provided at height of 4.00m from the bottom. One set of cross bracing are to be provided in each face in between the 1st and 2nd horizontal stiffeners. All the stiffeners and inclined members are to be projected 0.30m beyond the longitudinal members. All the points are to be pinned with 22 Cm long patent nails and protruding end is to be bent properly to have a firm grip and the apex point is also to be clustered with 8 G. wire. All the members are to be punched with chisel or auger. The cribs are to be weighted with 25 Nos. of earth filled polythene empty cement bags in all corners and middle of 1st and 2nd row of horizontal stiffeners of the cribs, tied firmly with 8 G galvanised wire complete as directed. (Polythene bags, 8G. wire, bamboo pegs , wire rope, U-Bolt etc. will be supplied by the department free of cost.)(Using Bhaluka Bamboo at the rate of 14.00 nos / Rm) Launching of Crib without Boat

Supply of R.C.C. Porcupine member of size 0.10m × 0.10m × 3.00m with cement concrete proportion 1 :2:4, reinforced by 4 Nos. of 8mm dia TMT bar. and 4mm dia (8G) wire stirrups at 15cm. C/C with 2 (two) nos of holes of 20mm dia at 50 cm inside from both sides in the same face and in the other face of member another 2 (two) nos. of holes of size 20mm dia at 65 cm inside from both ends including properly curing for 28 days and supply at work site complete as directed. (Date of casting and Name of Supplier should be engraved on the members).

Labour charge for launching of R.C.C. Porcupine including carriage of R.C.C. porcupine members of size 0.10m × 0.10m × 3.00m from the stack yard to the place of launching ,erection of the Porcupine with 6 (six) members properly, supply & fitting/fixing with 12 mm dia 25 Cm long M.S. Nuts and bolts and launching the porcupine properly as directed. (Lead up to 150 m) Launching without boat.

Labour charge for launching of R.C.C. Porcupine including carriage of R.C.C. porcupine members of size 0.10m × 0.10m × 3.00m from the stack yard to the place of launching ,erection of the Porcupine with 6 (six) members properly, supply & fitting/fixing with 12 mm dia 25 Cm long M.S. Nuts and bolts and launching the porcupine properly as directed. (Lead up to 150 m) Launching without boat. Launching by boat:

Earthwork in bank trimming to the designed section /slope including removing the soils and depositing on bank/toe of embankment .As directed by the department including clearing light jungles,debries and other foreign materials etc. with all lead &lifts.

Rabindra Chhawchharia