WBIW/CTU/CE(N)/e-NIT- 33(e)/ 2025-26 S.L 01

Earthwork in excavation in the canals / drainage channels / borrow pits / River bed / slope of bank as noted below as per designed section & throwing the spoils in layers of 25 cm. or making banks as per profile or to deposit the same in any other place within an initial lead of 30 metreand initial lift of 1.5 metre including breaking clods, rough dressing etc. complete as per direction of the Engineer-in-charge.

(a) Ordinary soil / local soil / soil mixed with moorum or kankar / silt, dry or moist / slushy silt / sticky soil.

Supplying Nylon cage netting 1 metre x 1 metre x 1 metre size with knot having mesh size 17.5 cm x 17.5 cm constructed with nylon thread (210 x 24) having tensile strength not less than 250 Kg. / sq. cm. including carriage, delivery and stacking at site inclusive of all taxes complete.

Labour charges for dumping and placing in position properly filled in Nylon crates with filled in gunny / poly cement bags (minimum 25 nos. having capacity 50 kg) with local earth or sand, sewing and tying the crate with nylon wire within a lead of 150 m. and all lifts in river slope or bed by cutting trenches upto 50 cms depth, if necessary, or by boat including cost of hire charges of boat, boatmen and other necessary equipments and also including cost of bags, carriage and charge of filling bags with earth / sand but excluding cost of nylon crate as per direction of the Engineer – in – Charge. NB:- Volume of each earth/ sand filled bags should not be less than 0.028 m3. Size of Nylon crate is 1metre X 1metre X 1metre.

(a) Where boats are not necessary.

Darma mat stiffened with split bamboo wailing pieces in both direction @ 50 cm c/c, placed, fitted and fixed with frame work or behind piling works and tied with 22 SWG, GI wire as per direction including cost, carriage and supplying all materials to site complete.

(A) Where boats are not necessary

Making rectangular sausage cage with 10 SWG galvanized iron wire of 125mm. x 125mm. mesh wire netting with proper lapping of minimum 150 mm. including sewing the joints with 12 SWG G I wire and supply of all materials and equipments including placing the sausage cage in position, filling the same with boulder or lump agreegates complete as per direction of the Engineer-in-charge but excluding the cost of boulder / lump aggregates and its carriage upto site.(Cost is excluding the cost of end pieces )

(b) 1.20 metre x 0.90 metre nominal section

(d) 0.9 metre x 0.60 metre nominal section

Supplying, fitting, fixing end pieces for rectangular / square / circular sausages at the ends, with 10 SWG / 8 SWG G I wire net of different mesh sizes tying & sewing the same maintaning a lap langth of 150 mm all around with 12 SWG G I wire complete, including the cost of supply of wire netting,fitting etc, complete as per direction of the Engineer - in - Charge.

(b) Mesh size 125 mm x 125 mm with 10 SWG wire

Precast cement concrete blocks or lining units as per designed size and specification, in nominal mix proportion 1:1.5:3 (corresponding to M20 grade ) with well graded 20mm down stone metal aggregate, including dressing, ramming, shuttering, finishing the surface with trowel without adding any additional cement and sand mortar, curing, transporting and laying the blocks or lining units at worksite in position, over sand cushion/filter layer, with cold (paper) joints between the adjacent units, having gap varying from 0 to 5 mm as tollerence, with all leads and lifts, including supply and carriage of all materials complete. (The rate is exclusive of the cost of stone aggregate and its carriage upto site. Construction wing has to add the cost of same from the SoR of PW (Roads) to derive the consolidated rate. Consumption chart of the USoR may be used for assessing the quantity of coarse aggregates per cum of concrete). Stone Aggregate of Pakur, or Rajmahal or broken stone of North Bengal varieties

Supplying at site and laying in position UV stabilized polypropylene woven geotextile of 430 gsm as filter, as per specification, including cost of preparing the bed, placing the geotextile as per profile with at least 15cm lapping, wherever required and anchorage at top, sewing / welding the overlapped portion, storage and transportation by all means, complete as per direction of the Engineer-in-charge. Note: 1. Payment to be made on measurement of finished surface without lapping, but including anchoring length at top. 2. Payment will be made subject to the result of 3rd Party Testing, to be done by the Engineer-in-charge departmentally. Paragraphs 2.7.7, 2.7.9 and 2.7.10 under the Chapter of “Specification for Works” in the USoR shall be reproduced and included in the tender document as “Specification & Special Terms & Conditions for Geotextile” in case of use of this item in the estimate. 3. This particular item is to be used in special cases, either in continuation of previous usage or after offering adequate justificationfrom techno-economical angles.

(A) Filling in foundation or plinth by silver sand in layers not exceeding 150 mm as directed and consolidating the same by thorough saturation with water, ramming complete including the cost of supply of sand. (payment to be made on measurement of finished quantity)

“Cast-in-situ cement concrete blocks or lining units as per designed section and specification normal mix proportion 1:1.5:3(coresponding to M 20 grade) with well graded 20 mm down stone metal aggregate, laid in position by casting in alternative panels or otherwise to keep a gap of 12mm between the adjacent units, over a layer of polythene sheet of thickness not less than 100 mm to act as a separator between the bottom surface of the block and the sand cushion /filterer material laid below the blocks, including dressing, ramming, shuttering, finishing the exposed surface by trowel with out adding any additional cement and sand mortar , curing and filling the gaps between the adjacent units by 5.6mm down coarse aggregate to be compacted properly, with all leads and lifts including supply and carriage of all materials, complete, without the cost of sand cushion / filter. (The rate is exclusive of the cost of stone aggregate and its carriage upto site. Construction wing has to add the cost of same from the SoR of PW (Roads) to derive the consolidated rate. Consumption chart of the USoR may be used for assessing the quantity of coarse aggregates per cum of concrete). With Stone aggregatesl (Pakur,or Rajmahal orbroken stone of North Bengal varieties)

Supply of Pakur variety stone materials at site of work including of all charges such as carriage, royalty, central & cess tax and allowance of shrinkage.

(a) 5.60mm chips

Making cubical bamboo porcupine cages with bamboo of 60 mm to 75mm dia.having length of 2 metre each for all horizontal and vertical struts and 2.8 metrelength for diagonal struts, 3 nos horizontal and 3 nos vertical struts should be placed equi-distant from each face to make the square cage of outer dimension 75cm x 75 cm and projecting each strut by 60 cm on all directions. Two nosdioganals or cross bamboo posts should be placed on each face having theircentre tied with the centre of cage properly including fitting, fixing corners, vertical, horizontal and diagonal struts with iron nails not less than 20 cm long and tyingcorners with 16 SWG galvanized iron wire, filling the cages with 1st class kiln burn Brick @ 80 nos bricks per cage. Cages builts with 10 SWG hexagonal or squarepattern 10 cm mesh, with proper lapping, tying and sewing with 10 SWG GI wirencluding cost of all materials, carriage to site and laying the same in the bed orslope of the river complete as per direction of the Engineer - in - Charge . N.B::- If G I wirenetting is not considered then Rs. 294.00 per cage may bededucted from the following costs, towards cost of wire netting along with OH, conctarcor's profit and Cess.) For cages of size 75cm X 75cm X 75cm with boulders.

(a) Single cage.

Extra rate for items above for dumping by boat in flowing water including cost of hiring of boat, boatman, loading into boat and dumping in specified location including all other equipments etc. complete as per direction of the Engineer-in-charge.

Supply of Pakur source stone boulders (Each weighing 25 kg & above) at site including cost of material, loading, unloading,stacking and carriage and including all incidental charges like Royalty,complete. (Royalty certificate in original from concerned authority are to be submitted along with the bill)

(b) Pakur source (Each weighing 25 kg & above)

Labour charges for stacking unloaded boulder / shingles to make them convenient for measurement as per direction of the Engineer-in-charge.

(b) Boulder of size upto 30 kg

Extra rate for stacking unloaded boulder on private land (where Govt. land is not available) to make them convenient for measurement as per direction of the Engineer-in-charge. (Land to be arranged by the contractor at his own cost.) Note :- This item is payable only when the Engineer-in-charge in his discretion is salisfied about the necessity.

Supplying Nylon cage netting 1 metre x 1 metre x 0.4 metre size with knot having mesh size 17.5 cm x 17.5 cm constructed with nylon thread (210x24) having tensile strength not less than 250 Kg. /Sq.Cm. including carriage, delivery and stacking at site inclusive of all taxes complete.

Supplying and Labour charges for dumping and placing in position properly filled in Nylon crates with filled in HDPE bags (min. 15 nos.) with local earth or sand, sewing and tying the crate with nylon wire within a lead of 150 m. and all lifts in river slope or bed by cutting trenches upto 50 cms depth, if necessary, or by boat including cost of hire charges of boat, boatmen and other necessary equipments and also including cost of bags, carriage and charge of filling bags with earth / sand but excluding cost of nylon crate as per direction of the Engineer–in–Charge. NB:- Volume of each earth/ sand filled bags should not be less than 0.0328 m3. Size of Nylon crate is 1metre X 1metre X 0.4 metre.

(a) Where boats are not necessary.

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