Immediate measures to flood protection and drainage in Patherkandhi Ph-II L/B of river Longai under SDRF for 2020-21(Restoration of breach like damage section at vill Kalkali L/B under SDRF for 2020-21

Amount

Thick jungles: Clearing thick jungles and trees up to 50 cm in girth uprooting roots and stumps, removing them from the site of the work etc. complete as directed. When more than 60% of the area is covered by shrubs, trees etc.)

Cutting bamboo clumps uprooting roots & stumps including removing them from site of work etc. complete as directed.

Supplying of galv. wire netting sheets of size 2.57 X 1.67 m made of 8 G wire of 152 mm sq. mesh including 76 mm projection of each wire on all side beyond the net size of 2.42 m X 1.51 m including labour charge for loading unloading stacking cost of P.O.L.

Supply of Geo-textile bag of type – A (1.03 x 0.700 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, Tensile strength(MD)≥22KN/m (ii) Mass ≥400.00 Gm/m2 (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 geo-textile strength. Stitching of gabs 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)

Supply of non woven Geo textile fabric sheet of 300 GSM manufacture from 100 % virgin prolypropylene (PP) fibre with minimum properties as (i) Tensile strength >_ 12 KN/m (ii) Mass >_300 GM/m2 (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 (ix0 Permittivity >=1.25 (x) Trapezoidal tear strength < = 340 N (xi) Permeability = 2.00 x 10 -3 m/sec (xii) seam strength = 80 % of Geo textile 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 the manufacturer and 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

Collection and supply of brick bats 10 – 40 mm size to work site, including loading unloading, transportation and stacking in measurable stacks, including sale tax, Compensation if any etc complete as directed.

Supply of Sewing Thread/yarn PPMF stitching thread (2000 Den. Kaplon) i/c payment of taxes)

Carriage of Geo bags of size 1.03 x .70 m including loading and unloading, stacking cost of POL etc complete and including hire charge of truck with driver and handyman complete as directed. (distance to be calculated with respect to For Guwahati)

Carriage of Geo Fabric sheet including loading and unloading, stacking cost of POL etc complete and including hire charge of truck with driver and handyman complete as directed. (distance to be calculated with respect to For Guwahati)

Local carriage of Boulder, metal, gravel sand brick bats etc. from the approachable site beyond 150 m and upto 3.00 Km from the work site including loading at stack and unloading at work site with 10(ten) capacity truck, supplying POL etc complete as directed.

Earthwork in excavation in foundation of toe key cage and slope cage in all kinds of soil to the designed section and levels as per direction and depositing the spoil earth to a safe distance place as directed including ramming dressing and bailing out of water etc. complete as directed.

Labour charge for laying Geo Fabric sheet as filter below pitching including anchoring complete as directed.

Labour Charge for filling inverted filter drain both horizontal and vertical drain / filter medium with river shingles of size 10 – 38 mm in layers, river boulder of sizes 50 – 100 mm/ brick bats of size 10 – 40 mm to the designed sections and levels including local carriage of materials from a distance of 150 M complete as directed.

Filling and laying in cage with silt filled Geo-bags of size 1.03 m x 0.70 m including excavation of specified silt from flood plain or adjacent chors within a distance of 90 m 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 double stitched 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 150 m and laying properly in cages made of wire netting sheets of size 2.57 x 1.66 m of 8G galvanized wire making the cage from two nos. of wire netting sheets by tying the projected wires complete as directed.(Geo bag, wire netting sheet and polypropylene thread will be supplied by the deptt. Free of cost.) (Without Boat)

Filling and laying of Geo-bags of size 1.03 m x 0.70 m including excavation of specified silt from flood plain or adjacent chors within a distance of 90 m 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 double stitched 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 150 m and laying properly as directed.(Geo bag and polypropylene thread will be supplied by the deptt. Free of cost.) (With boat)

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

Laying and pitching moist mortar filled ECB @0.028 m3 / bag on trimmed river slope including preparing the most cement mortar (1:3) filling and stitching the mouth with nylon/plastic thread including preparing seat of bags complete as directed

Earthwork in embankment by truck carriage in locally available ordinary/normal soil excluding rocky soil free from roots & vegetation and filling in uniform layers not exceeding 22cm. thick including 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 6 Km and up to 8.00 Km and for all lifts

Construction of double bamboo spur 1.50 M width whole baruah bamboo posts 7.50 cm to 10 cm in dia placed 15 cm C/C driven 1.40 m to 1.60 m below ground and 2.80 m to 3.20 m above ground tied with cane/ wire of 16 G to 18 G strengthening with jungle wood post of size 20 – 25 cm dia driven 1.80 = 2.20 m below ground & 2.80 = 3.20 m above ground at 1.50 m apart inside spur by hand shaking and providing double collar of jungle wood post 10-17 cm dia two nos one at top and another on bottom on both sides of post against each row fixing with patent nails including providing 3 rows of horizontal bamboo runner in all sides fixing with patent nails with jungle wood posts and providing half jati bamboo kamies three rows in all sides tied with cane/wire where necessary and filling branch wood inside the spur packed tied with cane/wire etc. as directed.

CMC ASSOCIATES -KULEN HAZARIKA JV

BISWAJIT DASGUPTA