Construction of Infiltration well (1No) Thamirabarani River bed at Pudukudi Panchayat Cheranmahadevi Panchayat Union

Amount

Earthwork excavation above water level in light or sandy or clayey soils for infiltration wells including levelling the site with an initial lead of 10 metres. (TWAD Schedule of Rates 2024-25 , WD-W0076)- For first depth of 2m

Sinking of infiltration well of 4.50m internal dia below water level in Ordinary soil (or) loose soil / sandy soil including all incidental charges using special tools and plants such as air compressor, helmet etc., complete and including baling out water. (TWAD Schedule of Rates 2024-25, Page-224)

For first depth of 2m

For second depth of 2m

For third depth of 2m

Plugging the bottom of the well with coarse sand of approved sizes and grade as directed by the Officers etc., complete as per standard specification.

Porous concrete using 20mm HBG Stone in cement and aggregarate of 1:4(One cement and four HBG Jelly) for steining of infilatration well excluding cost of centering but including curing etc., complete and as directed by the officers.

RCC 1:1.5:3 mix using 20 mm ISS HBG metal inculding cost and coveyance of all materials to site including labour etc., Complete excluding cost of steel without centering.

Supplying and erecting steel centering for sides and soffits I including necessary supports' and shuttering to the required height for RCC items using MS sheets of suitable size of BG.10 stiffeneq with welded MS angles of size 25mm x 25mm x3mm of boarding, laid over silver oak joints of size 10cm x 6.5cm spaceqat 90cm centre to centre and supported by casuarina props of 10cm to 13cm dia spaced at 75cm centre to centre complying with standard specifications etc., complete and as directed by TWAD Board officers.

PLANE SURFACES

Curved Surface

Supplying, fabricating and placing in position of HSD steel rods for Reinforcement including the cost of steel and binding wire etc., complete and as directed by TWAD Board officers.

Painting two coats with approved cement paint over one coat of priming coat over cement plastered exposed surface of the Reservoir including cleaning, preparing the surface and curing etc., complete and as directed by TWAD Board officers.

Supplying and fixing of CI manhole frame and cover of size 0.60mx0.60mwith suitable 50x50x6mm MS angle fixed along edges etc., complete.

Supply , delivery and fixing of CI Steps to be embedded in the wall of the infiltration well (inside) with vertical clearance of 0.30m c/c and Horizontal clearance of 0.38m c/c in staggered manner etc., complete and as directed by officers.

Providing cutting edge using 12G 75 x 75 x 6 mm MS angle for making cutting edge for well curb including all cost for fabrication, welding and placing in Position in the curb including supply of the MS sheet etc., complete.

Providing New ancarage arrangements

Provision for Supply and fixing of I section SMB - 200 sizes

Supply and Delivery of 100 mm GI pipe including all cost and Conveyance etc Complete

Laying and Joining OF GI Pipe including all Cost and Conveyance etc Complet.

S VELSAMY (BID ID -1550276)