Immediate measures for bank stabilisation at Hatimura area under Kaliabor Revenue Circle from the avulsion of river Brahmaputra for the year 2025-26.

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 Type C Geobags of Size 1.50m × 1.00m inner dimension made of composite layers of geotextile as per specifications. Woven geotextile for the outer cover. The woven geotextile is PP (Poly-Propylene) woven with UV resistant slit film tape fibre with MARV (Minimum Average Roll Value) values of the following properties. Geotextile used to manufacture geotextile bags should have high mechanical properties for enhanced durability along with enhanced puncture, abrasion and UV resistance characteristics. Geotextile should be inert to biological degradation and resistant to naturally encountered chemicals, alkalis and acids Tensile strength (MD) ≥ 80 kN/m & Tensile strength (CD) ≥ 70 kN/m. • Weight (ISO-9864/ASTM D5261) ≥ 210 Gms/sqm, •Tensile strength (MD) (ASTM D4595) ≥ 29 kN/m. •Tensile strength (CD) (ASTM D4595) ≥ 29 kN/m. •Tensile Elongation (ASTM D4595) ≥ 5% & ≤ 25%. • Grab Elongation (ASTM D4632) ≥ 5% & ≤ 25%. •Tensile strength (ASTM D4632) = 1.5 kN. •UV resistance (ASTM D4355) = 80%/500 hours. Non-woven geotextile for the inner layer. It is needle punched non-woven geotextile made of 100% polyester staple fibres which are formed into a random network for dimensional stability. It should resist UV degradation, rotting and alkalis. • Weight (ISO-9864/ASTMD5261) ≥ 150 Gms/sqm, • Tensile strength (MD) (ASTM D4595) ≥ 5kN/m. • Tensile strength (CD) (ASTM D4595) ≥ 5 kN/m. • Tensile Elongation (ASTM D4595) ≥ 5% & ≤ 25%. •Grab Elongation (ASTM D4632) ≥ 5% & ≤ 25%. • Tensile strength (ASTM D4632) = 1.5 kN. •UV resistance (ASTM D4355) = 35%/500 hrs. Bags are to be supplied in a bundle of 50 numbers, properly packed with name of Manufacturer and Batch Number is to be marked on each bag with “WRD Govt. of Assam” to be printed with minimum font size height of 50 mm on each bag and mentioning clearly the GSM and type of geobag polymer. Test certificate from approved NABL (National Accreditation Board for Testing and Calibration Laboratories) accredited and ISO International Organization for Standardization)-certified laboratory should invariably be submitted to the Purchaser against each batch of material on delivery. Stitching of bags should be Ring Spun Yarn stitches with 2500-3000 denier double line chain stitch with overlap with stitches along the edge.

Item No. 3: Supply of Geobags of Size 1.00m × 0.70m inner dimension made of staple fiber needle-punched nonwoven geotextile sheets of 300 GSM manufactured from 100% polyester fiber. The Geo-textile non-woven fabric sheets of 300 GSM manufactured from 100% polyester fiber should have the following properties • Tensile strength as per ISO 10319 (CD) ≥ 9 kN/m • Tensile strength (MD) ≥ 9 kN/m • Nominal Masses as per ASTMD 5261 ≥ 300.00 Gm/m² • CBR Puncture Resistance as per ASTEMD 6241 ≥ 1400 N • Tensile Elongation as per ASTMD 4595 (CD) ≥ 50% • Elongation (MD) ≥ 50% • UV Resistance as per ASTMD 4355 ≥ 35% • AOS as per ASTMD 4751 ≤ 100 micron • Permittivity as per ASTMD4491 ≥ 1.25/sec, • Trapezoidal Tear Strength (Weaker direction) as per ASTMD4533 ≤ 260 N • Permeability as per ASTMD4491= 62.5 Lt/m2/sec Stitching of bags should be double line chain stitch with overlap. Bags are to be supplied in a bundle of 100 numbers, properly packed with name of Manufacturer and Batch Number and each bag to be marked with “WRD Govt. of Assam” to be printed with minimum font size height of 50 mm on each bag and mentioning clearly the GSM and type of geobag polymer. Test certificate from approved NABL (National Accreditation Board for Testing and Calibration Laboratories) accredited and ISO (International Organization for Standardization)-certified laboratory should invariably be submitted to the Purchaser against each batch of material on delivery. .

Carriage of Geo Bags of size 1.03 × 0.70 m / 1.0 x 0.7m 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) Distance from Divisional Store to Work Site = 60 KM

Carriage of Geo Bags type-C of size 1.5x 1.0 m including loading & unloading, Stacking, etc. complete and including hire charge of truck with driver and handyman cost of POL etc. completed as directed. For 60 km

Filling and laying of Geo bags of size 1.03 m × 0.70 m including excavation of sand/silt of size more than 80 micron from flood plain or adjacent chars within a distance of 90 m of the work site, filling geo bags with sand/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 department free of cost) Without Boat

Filling and laying of Geo bags type-C of size 1.5m X 1.0m including excavation of sand/silt from flood plain or adjacent chars within a distance of 90m of the work site, filling geo bags with sand/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 including excavation of sand/silt of size more than 80 micron from flood plain or adjacent chars within a distance of 90 m of the work site, filling geo bags with sand/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 department free of cost) With Engine Boat

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