M and R to R/B of river Chengnoi near village Balitara for the year 2021-22.( Protection of Nalbari Dhamdhama PWD road for a length of 250.00 m).

Amount

Earth work in embankment by Tractor-trailer carriage by mechanical means with locally available ordinary soil excluding rocky soil free from roots & vegetation and filling in uniform layers not exceeding 22 cm. thick including ploughing or roughening,For initial lead up to 1 Km and for all lifts as per

Earthwork in bank trimming to the designed section/slope by manual means including removing thetrimmed 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 16653:2017i. 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) ≥ 450Nv. CBR Puncture strength ≥ 4000Nvi. Permittivity ≥ 1.10s – 1vii. Permeability ≥ 40l/m2/sec viii. AOS ≤ 75 micronix. UV Resistance @ 500 hours retained Tensilestrength (MD) & (CD) ≥ 80%x. Mass ≥ 400 gm/m² xi. Thickness at 2KPa ≥ 3 mmxii. Seam strength ≥ 80 % of actual fabric strength.Stitching of Bags should be Ring Spun Yarn stitcheswith 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 againsteach batch of material)

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).

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

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 mmprojection 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.

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 asdirected. (Distance to be calculated from Divisional go down to work site) .

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 completed as directed.(Distance to be calculated from Divisional go down to work site) .

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

Collection and supply of River silt by truck carriage free from debries and other foreign material, etc. complete as directed. By manual Means For initial up to 1.00 Km & for all lifts.

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 worksite, 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 mouthof the filled bags with polypropylene thread by power driven double needle double stitched machine, stacking the same in batches of 100, carrying the sameto 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.

Filling and laying in cage with sand/silt filled Geo bags of size 1.03 m × 0.70 m excluding excavation of specified sand/silt from flood plain or adjacent chars within a distance of 90 m of the work site, filling geobags 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 needlemachine, 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 nettingsheets of size 2.57 × 1.66 m of 8 G galvanized wiremaking 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 thedepartment free of cost)Without Boat

Collection of river 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) free from dust, dirt and other foreign materials including necessary carriage and stacking in regular measurable stacks at site, monopoly, etc. complete as directed. (10% under sized (not less than 10 cm) boulder is allowable for packing/filling the gaps occurred duringexecution of works) Complete as directed.(15% deduction will be made from the stack measured quantities on account of void).

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 sitecarriage 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) Without boat

Earth work in excavation of drainage channel 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 normal Soil.

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 Ordinary Soil.

JYOTI PRAKASH BAISHYA