Anti-erosion measures against bank erosion of river Mora-Pagladia (2nd Km R/B) under SOPD for 2019-20

Amount

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).

Earthwork in bank trimming to the designed section /slope including removing the soils at a safe distance, complete as directed.

(A)Supply of Geo-textile bags of type-A (1.03X0.70M) made of Geo-textile non-woven fabric sheets of 400 GSM manufactured from 100% virgin Polypropylene (PP) fibre having thickness not less than 3.00 mm with minimum properties as (i) Tensile strength (CD) ≥ 24 KN/m (ii) Tensile strength (MD) ≥ 22 KN/m (ii) Mass ≥ 400.00 Gm/m ² (iii) CBR Puncture strength ≥ 4100 N/m2 (iv) Elongation @ break (Warp) ≥ 54% (v) Elongation @ break (Weft)≥ 52% (vi) Abrasion ≥ 70 % (vii) UV Resistance @ 500 hours ≥ 70% (viii) AOS ≤ 75 micron (ix) Permittivity ≥ 1.25, (x) Trapezoidal Tear Strength ≤ 520 N (xi) Permeability = 45Lt/m2/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. (Bags are to be supplied of 100 numbers or part in a bundle, properly packed with name of Manufacturer and Batch Number is to be marked on each bag with “WRD Govt of ASSAM” to be printed on each bag and mentioning properly the GSM and type of Geo bag polymer. Test Certificate from approved NABL accredited and ISO Certified Laboratory should invariably be submitted against each batch of material).

B) Analysis of rate for carriage of Geo bags of size (1.03 x0.70m) incliding loading and unloading stacking cost of OPL etc. complete as directed.

Supply of Galvd. Wire netting sheets made of 8G. Wire of 152mm (6”) squire mesh in sheet of overall size 2.57 x 1.66 m (5’ – 6” ) including 76mm projection of each wire on all sizes beyond the net of 2.42 x 1.50m ( including loading, unloading and stacking properly etc. Complete as directed. Tax extra).

Supply of Sewing Thread/Yarn PPMF Stitching Thread (2000 Den. Kaplon) i/c payment of taxes.(inclusive of labour cess 1%)

Filling and laying in cage with silt filled Geo bags of size 1.03m X 0.70m including excavation of specified silt from flood plain or adjacent chars within a distance of 90m of the work site, filling geo bags with silt having minimum weighing 126.00 Kg and minimum volume 0.084 cum after filling ,double locking chain stitching the mouth of the filled bags with polypropylene thread by power driven double needle machine, stacking the same in batches of 100, carrying the same to the dumping site including all handling charges and local carriage within a distance of 150m and laying properly. in cages 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 complete as directed. (Geo Bag , Wire Netting Sheets and Polypropylene thread will be supplied by the department free of cost)