PROTECTION AND PREVENTION OF SOUTH BURIBAIL AREA UNDER SILCHAR REVENUE CIRCLE FROM EROSION OF RIVER BORAK UNDER SDMF FOR THE YEAR 2025-26 IN CACHAR DISTRICT OF ASSAM.

Earthwork in bank trimming to the designed section /slope by manual means including removing the trimmed soils to a minimum distance of 30 m, complete as directed.

Carriage of excavated muddy/slushy soil/garbage by truck of 10 MT capacity and depositing the same in suitable dumping ground within an average lead of 5.00 Km including cost of P.O.L. and loading/unloading charges etc. complete as directed.

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

Earth work in embankment by Mechanical means by truck carriage with locally available ordinary/normal soil excluding sandy and rocky soil free from roots & vegetation and filling in uniform layers not exceeding 25 cm thick including ploughing or roughening or benching the seats, removing all debries, breaking clods up to 4 cm cube, dressing as per design section and compaction in layers not exceeding 30 cm in thickness and core cutter soil test at every layer and every 500 m distance, etc. complete as directed Compaction with vibratory roller of 80-100 kN capacity For initial Lead up to 1.00 Km for all lifts . For beyond initial 1 Km & up to 10.00 Km & for all lifts. L=10 km

Local carriage of boulder, metal, gravel/sand etc. from the approachable site beyond 150 m and up to 3.00 Km from the work site including loading from stack and unloading at work site with 10 (Ten) ton capacity truck, supplying P.O.L. etc. complete as directed.

Uprooting bamboo clumps where bamboo already removed including removing stumps to a minimum distance of 30 m etc., complete as directed.

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 = 24 km

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

Supplying and laying high strength flexible geogrids (HSFG) as soil reinforcement / basal reinforcement as per MORTH 3100 and IRC 113, made of high tenacity polyester core with polyethylene coating with Minimum Long Term Design Strength (LTDS) of more than 50% of ultimate tensile strength at 30 degree Celcius corresponding to 12 % strain. Ultimate tensile strength - 350 Kn/m

Supplying and installation of stone facia unit with integrated tail as secondary reinforcement of length 2 m that is made of mechanically woven, double twisted, hexagonal shaped wire mesh, Mesh type 10x12 as per IS 16014:2018, having D=100mm with tolerance of +/-10%, wire dia ID/OD 2.7/3.7mm, Zinc+ High Abrasion Resistant Polymer class A coated, mechanically edged/selvedged and shall have minimum 10 numbers of mesh openings per meter of mesh perpendicular to twist, with partition at 1 m interval etc. (exclusive of supply and filling of stones) complete as per detailed technical specifications attached and as directed by Engineer-in –Charge.

Providing and laying of PCC block of size 0.3 m × 0.3 m × 0.3 m, made in proportion 1:2:4 on trimmed graded slope of river bank including ramming the seat, curing, carriage of the block from the place of casting up to a distance of 200 m to the work site and all handling charges, etc. and complete as directed.

Carriage of boulder/metal /sand /gravel, etc. including loading & unloading cost of P.O.L. etc. complete and including hire charge of truck with driver and handyman etc., complete as directed. On kutcha road/ embankment./ quarry road (Road maintained by contractor) 1)Quarry Road for 1st km for every km extra lead beyond initial lead of 1 km and upto 10 km 2)Pucca road for every km extra lead beyond initial lead of 1 km & upto 10 km for every km extra lead beyond 10 km & upto 20 km for every km extra lead beyond 20 kms L= 25 km

Supplying & laying of drainage composite for use behind walls, between two different fills, alongside drains of road, below concrete lining of canals etc. having thermobonding a draining core - HDPE geonet comprises of two sets of parallel overlayed ribs integrally connected to have a rhomboidal shape with a polyethylene film and a nonwoven geotextile having mass per unit area 130 gsm and tensile strength of 8.0 kN/m that will be working as separation or protecting layer, geocomposite having in plane flow capacity of 0.7 L / (m.s) at hydraulic gradient of 1.0 & 20 kPa pressure and tensile strength of 13.5 kN/m , with mass per unit area of 830 gsm, at easily accessible location including top and bottom, with all leads and lifts, manpower and machinery, materials, labour etc. complete and as directed by Engineer - In - Charge.

P.V.C. Pipe 100 mm (Ordinary quality)

Providing & making Gabion structure with Mechanically Woven Double Twisted Hexagonal Shaped Wire mesh Gabion Boxes as per IS 16014:2012,MORTH Clause 2500, of required size, Mesh Type 10x12 (D=100 mm with tolerance of ±2%), Zinic+10% Al alloy+PVC coated, Mesh wire diameter 2.7/3.7 mm (ID/OD), mechanically edged/selvedged with partitions at every 1m interval and shall have minimum 10 numbers of openings per meter of mesh perpendicular to twist, tying with lacing wire of diameter 2.2/3.2 mm(ID/OD), supplied @3% by weight of Gabion boxes, filled with boulders with least dimension of 200 mm, as per drawing, all complete as per directions of Engineer-in-charge.

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)

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. With engine boat

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 =24 k m)

Construction of temporary shed of two roof with mud plinth of 0.45 m height above ground level with Bhaluka bamboo post 1.5 m apart, driven at least 0.75 m below ground and height above plinth of 2.5 m. Split Jatti bamboo/tarza wall 10 cm thick touch roofing over bamboo rua frame, placing at 0.15 m clear apart, fitted with bamboo kamies from binding doors and windows with Bamboo Chattai, strengthening with Bamboo frame binding with wire, roofing with TATA Shaktee roofing sheets etc., complete as directed. (Using Bhaluka Bamboo at the rate of 6.00 nos./Rm & Jati Bamboo at the rate of 61.00 nos./Rm)

Manufacturing, supplying and fixing retro reflective sign boards of size 1.22 m × 0.76 m made up of 4 mm thick aluminium sheet, face to be fully covered with high intensity encapsulated type heat activated retro reflective sheeting conforming to type - IV of ASTM-D 4956-01 in blue and silver white or other colour combination including subject matter, message (Bi - lingual), symbols and borders etc. as per IRC: 67-2001, pasted on substrate by an adhesive backing which shall be activated by applying heat and pressure conforming to Class - 2 of ASTM-D-4956-01 and fixing the same with suitable sized aluminium alloy rivets @ 20 cm C/C to back support frame of M.S. angle iron of size 25 × 25 × 3 mm along with theft resistant measures, mounted and fixed with 2 nos. of 900 mm thick pipe vertical post (AISI 202 Grade) of length 3750 mm firmly fixed to the ground by means of properly designed foundation with M15 grade cement concrete 30 cm × 30 cm × 30 cm etc. complete. and including making holes in pipes, angles flats, providing & fixing M.S. message plate of required size, steel work to be painted with two or more coats of synthetic enamel paint of required shade and of approved brand & manufacture over priming coat of Zinc chromate yellow primer (Vertical post to be painted in black and white colours). Backside of aluminium sheet to be painted with two or more coats of epoxy paint over and including appropriate priming coat including all leads and lifts etc. complete as per drawing, specification and direction of Engineer-in-Charge

supply of sewing thread/ yarn ppmf Stitching thread(2000 den. Kaplon)

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