Anti-erosion measures along right bank of river Kollong at Bhuyanpatty (Eidgah field) and Haldhiati area.

Amount

Item No.1/2.11 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.

Item No.2:/4.01:- Collection of blasted boulder of size 23 cm. to 30 cm in average and minimum weight 30 Kg having i. Specific gravity not less than 2.65, ii. Aggregate Chrushing < 30% (Wearing) & < 45%(Non - wearing) iii. Impact Value (%) max < 30% (Wearing) & < 45%(Non - wearing) and iv. Abrasion Value (%) < 30% (Wearing) & < 50%(Non - wearing) (Materials conforming to IS 2386 part III & IV 1963) and free from dust, dirt and other foreign materials including local carriage and stacking in regular measurable stacks of approximate 1 (One) m. height at site, etc. complete as directed. (10% under sized (minimum 10 cm) boulder is allowable for packing/filling the gaps occurred during execution of works). (15% deduction will be made from the stack measured quantities on account of void) Quarry:- Dhalpahar

Item No.3/11.4: Preparation of stack yard of boulder/metal etc. including cutting light jungles and removing the same to a safe distance, levelling the ground, filling up depressions etc. complete as directed

Item No.4/ 11.12:- 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 6.3Kg/sheet.

Item No.5:/5.01.3:- Labour charge for dumping boulder in cage 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, filling boulder inside in cage, launching the same in position, including all handling charges and including site carriage of boulder from stack yard/ dump site within a distance of 150 m. etc. and complete as directed. (Wire netting sheets to be supplied by the Department free of cost) 5.01.1:- Without Boat

Item No.6:/10.5 Supply of non-woven Geo-textile fabric sheets of 300GSM manufactured from 100% virgin Polypropylene(PP) fibre with minimum properties as per IS 16653:2017 · Wide Tensile strength (MD) ≥ 15kN/m & WideTensile 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 Tensilestrength (MD) & (CD) ≥ 80% · Mass ≥ 300gm/m² · Thickness at 2KPa ≥ 3 mm. (Each Roll of Geo Fabric Sheet should be supplied inproperly packed Bundles and should be marked withthe Name of Manufacturer, Batch Number & itsdimensions clearly on each roll with “WRD Govt. ofASSAM” to be printed on it and mentioning properlythe GSM and type of polymer and Test Certificate fromapproved NABL accredited and ISO CertifiedLaboratory should invariably be submitted againsteach batch of material).

Item No.7/8.07:-Labour charge for laying Geo fabric sheet as filter bellow pitching including carrying, lapping, wrapping & stitching as directed by the Engineer-in-Charge.

Item No.8:/10.2:- 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% virginPolypropylene (PP) fibre with minimum properties as per IS 16653:2017 i. Wide Tensile strength (MD) ≥ 20KN/m & WideTensile 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 Tensilestrength (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 stitcheswith 2500-3000 denier double line chain stitch withoverlap with stitches along the edge @ minimum 15stitches per 100 mm.(Bags are to be supplied of 100 numbers in a bundle,properly packed with each bag having proper tag withname of Manufacturer, Batch Number, the GSM andtype of polymer encrypted and stitched on top cornerand each bag is to be marked with “WRD Govt. ofASSAM” to be printed distinctly. Test Certificate fromapproved NABL accredited and ISO (CertifiedLaboratory should invariably be submitted againsteach batch of material) for Guwahati

Item No.9:/8.01A.2:- Filling and laying of Geo bags of size 1.03 m × 0.70 m excluding excavation of sand/silt 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. (Sand/silt, Geo Bag and Polypropylene thread will be supplied by the department free of cost) With Engine Boat

Item No.10:/8.01A.1:- Filling and laying of Geo bags of size 1.03 m × 0.70 m excluding excavation of sand/silt 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. (Sand/silt, Geo Bag and Polypropylene thread will be supplied by the department free of cost) Without Boat

Item No.11:/3.08:- 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 Divisionsal)Distance= 5 KM@ 0.014 no/km

Item No.12:/3.09:- 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 Store)Distance= 5 KM @ 0.014 Sqm/ KM

Item No.13:- Collection and supply of sand from approved quarry of specified grade for construction work free from debris and other foreign materials etc. complete as directed.

Item No.14/10.19:-Supply of Sewing Thread/Yarn PPMF Stitching Thread (2000 Den. Kaplon).

Item No.15/3.06:- Carriage of wire netting sheets of size 2.57 × 1.67 m made of 8 G wire of 152 mm Sq. mesh 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). Distance = 5 km @ 0.29 No/Km

Item No.16/2.08:-Earth work in excavation of drainage channel by mechanical means to the proper grade and slopes as required including disposing the excavated debris/soil to a safe distance of minimum 50 m distance, etc. complete as directed. For lead up to 50 m and all lifts

ABBASUZ ZAMAN