Anti erosion measures to protect both banks at different reaches from the erosion of river Pokoria.

Supply of non-woven Geo-textile fabric sheets of 300 GSM manufactured from 100% virgin Polypropylene (PP) fibre with minimum properties as per IS 16653: 2017  Wide Tensile strength (MD) ≥ 15kN/m & Wide Tensile strength (CD) ≥ 15kN/m  Elongation (MD) ≥ 50% & Elongation (CD) ≥ 50%  Abrasion ≥ 95% Trapezoidal Tear Strength (MD) ≥ 340 N & Trapezoidal Tear Strength (CD) ≥ 340 N  CBR Puncture strength ≥ 3000 N  Permittivity ≥ 1.25 s-1  Permeability ≥ 60l/m2/sec  AOS ≤ 75micron  UV Resistance @ 500 hours retained Tensile strength (MD) & (CD) ≥ 80%  Mass ≥ 300gm/m²  Thickness at 2KPa ≥ 3 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 & its dimensions clearly on each roll 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).

Labour charge for laying Geo fabric sheet as filter bellow pitching including carrying, lapping, wrapping & stitching as directed by the Engineer-in-Charge.

Supply of Geo-textile bags of type-A (1.03 × 0.70 m) inner to inner made of Geo-textile non-woven fabric sheets of 400 GSM manufactured from 100% virgin Polypropylene (PP) fibre with minimum properties as per IS 16653:2017 i. Wide Tensile strength (MD) ≥ 20KN/m & Wide Tensile strength(CD) ≥20 KN/m ii. Elongation (MD) ≥50% & Elongation (CD) ≥ 50% iii. Abrasion ≥ 95% iv. Trapezoidal Tear Strength (MD) ≥ 450N & Trapezoidal Tear Strength (CD) ≥ 450N v. CBR Puncture strength ≥ 4000N vi. Permittivity ≥ 1.10s – 1 vii. Permeability ≥ 40l/m2/sec viii. AOS ≤ 75 micron ix. UV Resistance @ 500 hours retained Tensile strength (MD) & (CD) ≥ 80% x. Mass ≥ 400 gm/m² xi. Thickness at 2KPa ≥ 3 mm xii. Seam strength ≥ 80 % of actual fabric 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 in a bundle, properly packed with each bag having proper tag with name of Manufacturer, Batch Number, the GSM and type of polymer encrypted and stitched on top corner and each bag is to be marked with “WRD Govt. of ASSAM” to be printed distinctly. Test Certificate from approved NABL accredited and ISO (Certified Laboratory should invariably be submitted against each batch of material)

Supply of Geo-Textile Bags, Type C of Size 1.50 m × 1.00 m, inner dimension made of composite layers of geotextile as per specifications below: Woven Geo-textile for the outer cover. The woven geo textile is woven with UV resistant slit film tape fibre with MAVR values of the following properties. Geo-textile used to manufacture geo-textile bags should have high mechanical properties for enhanced durability along with enhanced puncture, abrasion and U.V. resistance characteristics. Geo-textile should be inert to biological degradation and resistant to naturally encountered chemicals, alkalis, and acids.  Weight (ISO-9864/ASTMD 5261) ≥ 250 Gms/Sqm.  Tensile strength (MD) (ASTMD 4595) ≥35 kN/m.  Tensile strength (CD) (ASTMD 4595) ≥ 35 kN/m.  Tensile Elongation (ASTMD 4595) ≥ 5% & ≤ 30%.  Grab Elongation (ASTMD 4632) ≥ 5% & ≤ 30%.  Tensile strength (ASTMD 4632) = 1.5 kN.  UV resistance (ASTMD 4355) = 70%/500 hrs. Non-woven Geo-textile for the inner layer. It is needle punched non-woven geo-textile made of 100% polypropylene staple fibers which are formed into a random network for dimensional stability. It should resist UV degradation, rotting and alkalis.  Weight (ISO-9864/ASTMD 5261) ≥ 300 Gms/Sqm.  Tensile strength (MD) (ASTMD 4595) ≥ 12 kN/m  Tensile strength (CD) (ASTMD 4595) ≥ 12 kN/m  Tensile Elongation (ASTMD 4595) ≥ 5% & ≤ 30%  Grab Elongation (ASTMD 4632) ≥ 5% & ≤ 30%  Tensile strength (ASTMD 4632) = 1.5 KN  UV resistance (ASTMD 4355) = 70%/500 hrs (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 Galvanized Wire Netting Sheet made of 8 SWG wire 152 mm square mesh in sheet 2.57 m × 1.66 m with longitudinal wire at 152 mm centre and 76 mm projection of each wire on all sides beyond the net size of 2.42 m × 1.5 m having knots of 12 SWG at every joints, weight of each sheet should not be less than 6.3 Kg/sheet.

Supply of Sewing Thread/Yarn PPMF Stitching Thread (2000 Den. Kaplon)

Earthwork in bank trimming to the designed section /slope by mechanical means including removing the trimmed soils to a minimum distance of 30 m, 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 & vegetation, dressing to design section etc. complete as directed. Ordinary Soil, For depth up to 3.00 m

Filling and laying in cage with silt filled Geo bags of size 1.03 m × 0.70 m excluding excavation of specified silt from flood plain or adjacent chars within a distance of 90 m of the work site, filling geo bags with sand 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 150 m and laying properly. in cages made of wire netting sheets of size 2.57 × 1.66 m of 8 G 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 / cage and Polypropylene thread will be supplied by the department free of cost) Without Boat

Filling and laying of Geo bags type-C of size 1.5m X 1.0m excluding excavation of silt from flood plain or adjacent chars within a distance of 90m of the work site, filling geo bags with silt having minimum weighing 330 Kg and minimum volume 0.221 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 150m and laying properly as directed. (sand/silt, Geo Bag and Polypropylene thread will be supplied by the department free of cost) With Engine Boat

Filling and laying of Geo bags of size 1.03 m × 0.70 m excluding excavation of silt from flood plain or adjacent chars 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. (Sand/silt, Geo Bag and Polypropylene thread will be supplied by the department free of cost) Without Boat