Anti-erosion measures to T/dyke along the L/B of river Buridehing from Joypur to Naharkatia at Nocte gaon.

Medium Jungles: Clearing medium 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% to 60 % of the area is covered by shrubs, trees etc.)

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.

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)

Carriage of Geo Bags of size 1.03 × 0.70 m including loading & unloading, stacking, etc. complete and including hire charge of truck with driver and handyman cost of POL etc. completed as directed. (Distance to be calculated from divisional store.) = 60 km

Supply of Geo Bags Type-B (Size 2.00 m × 1.50 m inner to inner (Pillow Type) made of composite layers of Polypropylene (PP) fibre as per IS 16653:2017 for Nonwoven and IS 16654:2017 for Woven: Woven Geo-textile for the outer cover (300gsm): The woven geo textile is woven with multifilament woven fabric manufactured from ultra violet stabilized polypropylene. Geo-textile used to manufacture geotextile 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. Properties: i. Tensile strength (MD) ≥ 80 KN/m & Tensile strength (CD) ≥ 70 KN/m, ii. Elongation (MD) ≤ 25% & Elongation (CD) ≤ 25%, iii. Abrasion ≥ 75%, iv. Trapezoidal Tear Strength (MD) ≥ 1500N & Trapezoidal Tear Strength (CD) ≥ 1300N, v. CBR Puncture strength ≥ 900N, vi. Permeability ≥ 18 l/m2/sec, vii. AOS ≤ 250 micron, viii. UV Resistance @ 500 hours retained Tensile strength (MD) & (CD) ≥ 80%, ix. Mass ≥ 300 gm/m², x. Seam strength ≥ 50 % of actual fabric strength.Non-Woven Geo-textile for the inner layer (300gsm): It is needle punched non-woven geo-textile made of 100% polypropylene staple fibres which are formed into a random network for dimensional stability. It should resist UV degradation, rotting and alkalis. Properties: i. Wide Tensile strength (MD) ≥ 15 KN/m & Wide Tensile strength (CD) ≥ 15 KN/m, ii. Elongation (MD) ≥ 50% & Elongation (CD) ≥ 50%, iii. Abrasion ≥ 95%, iv. Trapezoidal Tear Strength (MD) ≥ 340 N & Trapezoidal Tear Strength (CD) ≥ 340 N, v. CBR Puncture strength ≥ 3000 N, vi. Permittivity ≥ 1.25 s-1, vii. Permeability ≥ 60 l/m2/sec, viii. AOS ≤ 75 micron, ix. UV Resistance @ 500 hours retained Tensile strength (MD) & (CD) ≥ 80%, x. Mass ≥ 300 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. (Bags are to be supplied of 15 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)

Carriage of Geo Bags of size 2.00 × 1.50 m including loading & unloading, stacking cost of P.O.L. etc. complete and including hire charge of truck with driver and handyman, etc. completed as directed. (Distance to be calculated from divisional store.) = 60 km

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).

Carriage of 300 gsm Geo sheet of including loading & unloading, stacking cost of P.O.L. etc. complete and including hire charge of truck with driver and handyman, etc. completed as directed. (Distance to be calculated from divisional store.) = 60 km

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

Construction and supply of Wire -netting box of size 1.50 m × 1.50 m × 0.45 m made with mechanically woven, double twisted, hexagonal shaped wire mesh with wire made of low carbon, high ductile MS wire with heavy class of galvanization with an additional layer of PVC coating with mesh type of 10 × 12 as per EN 10223 & ASTM A975, mesh wire of 2.70 mm (I.D) /3.70 mm (OD)tensile strength of 450-500/mm2, edge wire selvedge around it at least 2.5 times, lacing wire (Zinc PVC coated) of 2.20 mm (I.D)/3.20 mm (OD), VC coating thickness of 0.50 mm nominal, 0.38 mm minimum, Mesh opening size 150 mm × 150 mm and with average weight per unit being 12 Kg with additional 3% of the weight of box for lacing wire supplied separately, supporting the facing of the box with zinc coated steel wire of required length as directed, complying with ASTM and European norms.