Immediate measures to restore the damages of village West Koliagaon of river Nangalbhanga on L/B under S.D.R.F. for 2021-22

Amount

Light Jungles: Clearing light jungles and trees upto 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.)

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

Supply of Geo-textile bags of type-A (size 1.03X0.70M), inner dimension 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 (iii) Mass ≥ 400.00 Gm/m ² (iv) CBR Puncture strength ≥ 4100 N/m2 (v) Elongation @ break (Warp) ≥ 54% (vi) Elongation @ break (Weft)≥ 52% (vii) Abrasion ≥ 70 % (viii) UV Resistance @ 500 hours ≥ 70% (ix) AOS ≤ 75 micron (x) Permittivity ≥ 1.25, (xi) Trapezoidal Tear Strength ≤ 520 N (xii) Permeability = 45Lt/m2/sec (xiii) 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). FOR GUWAHATI

Supply of Sewing Thread/Yarn PPMF Stitching Thread (2000 Den. Kaplon) i/c payment of taxes.

Earth work in bank trimming to the designed section/Slope including Removingthe soils at a safe distance. Complete as directed.

Earth work in excavation by hydraulic excavator, to proper grade and slopes as required including utilizing the spoils for filling works in the vicinity including removing roots and vegetation, dressing to design section complete as directed. (Ordinary soil, for depth upto 3.00m.)

Filling and laying in cage with silt filled Geo bags of size1.03 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 weighing 126.00Kg. and minimum volume 0,084cum 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 sheetby tying the projected wires complete as directed.(Geo bag Wire Netting sheets and polypropylene thread will be supplied by the department free of cost) (without boat)

MIRZA MD RAIHAN