Immediate measures to recoup flood damages on L/B of river Subansiri at Maghuachuk area to save the PGJH dyke under SDRF for 2019-2020.

Amount

Supplying and construction of bamboo cribs fabricated out in pyramid shape out of matured Barua bamboo 75mm to 100mm dia complete with all the branches and foliages with apex point at 7.00m from the bottom. At 0.60 m above the base of 1st row of horizontal stiffeners of size 4.00m x 3.00m are to be provided along with 2 Nos. of cross struts. A second set of horizontal stiffeners along with cross stiffeners similar to the 1st set are provided at height of 4.00m from the bottom. One set of cross bracing are to be provided in each face in between the 1st and 2nd horizontal stiffeners. All the stiffeners and inclined members are to be projected 0.30m beyond the longitudinal members. All the points are to be pinned with 22 Cm long patent nails and protruding end is to be bent properly to have a firm grip and the apex point is also to be clustered with 8 G. wire. All the members are to be punched with chisel or auger. The cribs are to be weighted with 25 Nos. of earth filled polythene empty cement bags in all corners and middle of 1st and 2nd row of horizontal stiffeners of the cribs, tied firmly with galvanised wire complete as directed. (Polythene bags, 8G. wire, bamboo pegs , wire rope, U- Bolt etc. will be supplied by the department free of cost.)(Using Barua Bamboo at the rate of 14.00 nos / Rm). Construction of Crib

Supplying and construction of bamboo cribs fabricated out in pyramid shape out of matured Barua bamboo 75mm to 100mm dia complete with all the branches and foliages with apex point at 7.00m from the bottom. At 0.60 m above the base of 1st row of horizontal stiffeners of size 4.00m x 3.00m are to be provided along with 2 Nos. of cross struts. A second set of horizontal stiffeners along with cross stiffeners similar to the 1st set are provided at height of 4.00m from the bottom. One set of cross bracing are to be provided in each face in between the 1st and 2nd horizontal stiffeners. All the stiffeners and inclined members are to be projected 0.30m beyond the longitudinal members. All the points are to be pinned with 22 Cm long patent nails and protruding end is to be bent properly to have a firm grip and the apex point is also to be clustered with 8 G. wire. All the members are to be punched with chisel or auger. The cribs are to be weighted with 25 Nos. of earth filled polythene empty cement bags in all corners and middle of 1st and 2nd row of horizontal stiffeners of the cribs, tied firmly with galvanised wire complete as directed. (Polythene bags, 8G. wire, bamboo pegs , wire rope, U- Bolt etc. will be supplied by the department free of cost.)(Using Barua Bamboo at the rate of 14.00 nos / Rm). Launching of Crib without Boat

Supplying and launching of tree branches of 5 cm to 7.5cm dia. 2.5m to 3.5m long with green foliage tied in bundle ( 4nos. in a bundle) with coir sutli securely anchored to stout jati bamboo post or 10 to 15cm dia., hard jungles wood peg driven at least 1.00m below ground and 0.50m above at a minimum safe distance of 7.50m from the river bank with 8G. galvd.tying wire, weighing the bundle with two nos.of earth filled cement bags tied with coir sutli including payment of forest royalty, VAT, etc.complete as directed.(Using Jati Bamboo at the rate of 21.43 nos / Rm)

Supply of Galvanised 8 G. Wire

Clearing medium jungles and trees upto 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 including removing the soils at a safe distance, complete as directed.

Supply of Geo-textile bags of type-A (1.03X0.70M) made of Geo-textile non-woven fabric sheets of 400 GSM manufactured from 100% virgin Polypropylene (PP) fibre having thickness not less than 3.00 mm with minimum properties as (i) Tensile strength (CD) ≥ 24 KN/m (ii) Tensile strength (MD) ≥ 22 KN/m (ii) Mass ≥ 400.00 Gm/m ² (iii) CBR Puncture strength ≥ 4100 N/m2 (iv) Elongation @ break (Warp) ≥ 54% (v) Elongation @ break (Weft)≥ 52% (vi) Abrasion ≥ 70 % (vii) UV Resistance @ 500 hours ≥ 70% (viii) AOS ≤ 75 micron (ix) Permittivity ≥ 1.25, (x) Trapezoidal Tear Strength ≤ 520 N (xi) Permeability = 45Lt/m2/sec (xii) Seam strength = 80 % of geotextiles 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 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).

Carriage of Geo Bags of size 1.03 x 0.70 m 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 with respect to FOR Guwahati)

Supply of Geo Bags Type-B (Size 2.00m x 1.50m)( pillow Type) made of composite layers of geo-textile 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) ≥300 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) ≥250 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).

Carriage of Geo Bags of size 2.00 x 1.50 m 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 with respect to FOR Guwahati)

Supply of non-woven Geo-textile fabric sheets of 300 GSM manufactured from 100% virgin Polypropylene (PP) fibre with minimum properties as (i) Tensile strength ≥ 12 KN/m (ii) Mass ≥ 300.00 Gm/m ² (iii) CBR Puncture strength ≥ 3.5 KN (iv) Elongation at break ≥ 60% (v) Abrasion ≥ 70 % (vi) UV Resistance @ 500 hours ≥ 70% (vii) AOS ≤ 75 micron (ix) Permittivity ≥ 1.25, (x) Trapezoidal Tear Strength ≤ 340 N (xi) Permeability = 2.00 x 10 ̄ ³ m/sec (xii) Seam strength = 80 % of geotextiles 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. (Each Roll of Geo Fabric Sheet should be supplied in properly packed Bundles and should be marked with the Name of Manufacturer & Batch Number clearly on each bundle 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 completed as directed.(Distance to be calculated with respect to FOR Guwahati)

Supply of galvanised wire netting sheet made of 8G wire of 152 mm (6') Squares mesh in sheets of over all size 2.57 m X 1.66 M. (8' -5"-6') including 76 mm projection of each wire on all size beyond the net size of 2.42 m X 1.31 M (1' -00' x 5 - 01') having knots of 12 gauge at every joint including loading loading unloading and stacking properly completed as diracted by the Departmant (weight of one sheet should not be less then 6.30 Kg. taxes extra)

Carriage of wire netting sheets of size 2.57 X 1.67 M made of 8G wire of 152 mm Sq. mesh including loading & unloading, Stacking cost of P.O.L. etc. completed and including hire charge of truck with driver and handyman completed as diracted.

Supply of Serviceable empty cement bags

Filling and laying of Geo-bags of size 1.03mx0.70m including excavation of specified silt from flood plain or adjacent chars within a distance of 90m of the work site, filling geo bags with silt having minimum weighing 126.00 Kg and minimum volume of 0.084 cum after filling, double locking chain stitching the mouth of the filled bags with polypropylene thread by power driven double needle double stitch 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.(Geo Bag and Polypropylene thread will be supplied by the department free of cost). a) without boat

Filling and laying of nonwoven Geo-textile bag of dimension 2.00mx1.50m including 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 volume 0.612 cum after filling,double locking chain stitching the mouth of the filled bags with polypropylene thread by power driven double needle machine, laying at proper site including all handling charges and local carriage within a distance of 100m complete as directed. (Geo Bag and Polypropylene thread will be supplied by the department free of cost) Without boat

Filling and laying in cage with silt filled Geo bags of size 1.03m X 0.70m including 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 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 150m and laying properly. in cages made of wire netting sheets of size 2.57x1.66m of 8G 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 and Polypropylene thread will be supplied by the department free of cost) Without Boat

Excavation of drainage channel to the proper grade and slopes as required including desposing the excavated debris/soil to a safe distance of beyond 100 m distance as directed. Wet & Sticky Soil For lead up to 30m and all lifts

Labour charge for laying and pitching earth filled cement bags including excavation and borrowing earth, breaking clods, filling in bags and supplying and stitching the mouth with jute sutli, etc. complete as directed. (cement bags will be supplied by the department free of cost).

Labour charge for laying Geo fabric sheet as filter bellow pitching including anchoring and complete as directed.

Supply of sewing thread/yarn PPMF stitching thread (2000 Den.Caplon) i./c payment of taxes

PRANAB KUMAR GHOSH