Protection of Kokrajhar Medical College and Hospital campus at Besorgaon from the erosion of river Gaurang on its Left bank (L/B). PACKAGE 2

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, etc. complete as directed. (When 30% of the area is covered by shrubs, trees etc).

Collection and supply 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). Quarry = At Saralpara River bed quarry.

Supply of non-woven Geo-textile fabric sheets of 300 GSM manufactured from 100% virgin Polypropylene (PP) fibre with minimum properties as (i) Tensile strength ≥ 12 KN/m (ii) Mass ≥ 300.00 Gm/m ² (iii) CBR Puncture strength ≥ 3.5 KN (iv) Elongation at break ≥ 60% (v) Abrasion ≥ 70 % (vi) UV Resistance @ 500 hours ≥ 70% (vii) AOS ≤ 75 micron (ix) Permittivity ≥ 1.25, (x) Trapezoidal Tear Strength ≤ 340 N (xi) Permeability = 2.00 x 10 ̄ ³ m/sec (xii) Seam strength = 80 % of geotextiles strength . Stitching of Bags should be Ring Spun Yarn stitches with 2500-3000 denier double line chain stitch with overlap with stitches along the edge @ minimum 15 stitches per 100 mm. (Each Roll of Geo Fabric Sheet should be supplied in properly packed Bundles and should be marked with the Name of Manufacturer & Batch Number clearly on each bundle with “WRD Govt of ASSAM” to be printed on it and mentioning properly the GSM and type of polymer and Test Certificate from approved NABL accredited and ISO Certified Laboratory should invariably be submitted against each batch of material).

Supplying of galvd. wire netting sheets made of 8G wire of 152 mm (6") square mesh in sheets of overall size 2.57 m × 1.66 m (8'6" × 5'6") including 76 mm projection of each wire on all sides 2.42 m × 1.50 m (8'0" × 5'0") having knots of 12G at every joints including unloading and stacking properly, complete as directed by the department (weight of each sheet should not be less then 6.30 Kg) (taxes extra) .

Construction and supply of W.N Box of size 1.50m x 1.50m x 0.45m made of mechanically woven double twisted hexagonal shape wire mesh with made of low carbon high ductile MS wire with heavy class of galvanization with an additional layer of PVC coating with mesh type of 10x12 as per EN 10223 & ASTM A975, mesh wire of 2.70mm (ID)/3.70mm(OD) tensile strength of 450-500/mm2 edge wire/ selvedge around it at least 2.50 times, lacing wire (Zinc PVC coated ) of 2.20mm (ID)/3.20mm (OD) PVC coating thickness of 0.50mm nominal, 0.38mm minimum and with average weight per unit being 10kg with additional 3% of weight of box for lacing wie upplied separately supporting the facing of the box with Zinc coated steel wire of required length as directed comping with A.S.T.M and Europian norms inclluding payment all duties, sale tax any other taxes as applicable loading, Unloading and stacking them at the site of work in measurable stacks, complete as directed.

Local carriage of boulder, metal, gravel/ sand 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 laying Geo fabric sheet as filter media bellow pitching.

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 150 m.etc. complete as directed. A) Without Boat

Labour charge for dumping boulder in PVC coated WN cage of size 1.50m x 1.50m 0.45m including properly placing and arranging the boulder inside the crates and lacing, tying the cage with Zink coated wire supplied separatery ( PVC coated WN box should be supplied by the department free of cost within 150m of work site), launching/placing the same in position as directed including all handling charges and local carriage of boulder within a distance of 150m etc. complete as directed . A) 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 specified stackyard complete as directed.

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). Without Boat.

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 ploughing or roughening or benching the seats, removing all debries, 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).

Earth work in filling by mechanical means including ramming means by deploying hydraulic excavator and trippers etc. with locally available ordinary soil excluding rocky soil with all lead and lift, transporting to site, spreading, dressing as per design section including ploughing or roughening or benching the seats, removing all debries, breaking clods up to 2.5cm cube, 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).

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

SONTOSH SAHA

SURAJIT ROY