Construction of 4.50M dia infiltration well to a depthof 9m at Puttuthakku Panchayat (Palar River)

Earth work excavation in all clauses of soil such as hard stiff clay, hard gravelly soil as per SS 20 B for narrow foundation. For First depth of 2m

Reinforced cement concrete M 30 Concrete using machine crushed HBG stone jelly excluding cost of centering, strutting, supply and fabrication of steel reinforcement but including cost of curing etc complete well curb,Triangular Portion,Binding Ring,Pilasters,Deduct for binding ring,Roof slab 100mm thick,Area = 3.14 X 4.402/4 = 15.20m2,Deduct for manhole cover

Sinking of Infiltration well of 4.5m internal dia and 5.50m outer dia below pilasters level including all incidental charges in sandy of light soil. Ist depth of 2m

IInd depth of 2m

IIIrd depth of 2m

IVth depth of 2m

Porous Concrete 1:4 (one cement, Four hard broken granity jelly of size 20mm) for steining of infiltration well excluding cost of centering but including curing etc., complete and as directed by the TWAD Board Officers. Well steining

Brick work in CM 1:5 (one cement and five sand) using country bricks of size 22X11X5 cm for steining of 45 cm thick for infiltration well including curing etc., complete and as directed by TWAD Board Officers. Well steining

Providing steel centering using MS plates of size 90cmX 60cm,13G to 10G thick welded with 25mmX3mmMS angles supported with country wood scantling of size 10cmX6.5cm at 50cm C/C strutting with casurina props of 10cm 13cm dia as directed by the TWAD Board Officer For Plane surface Bottom of roof slab, manhole side, plasters

For curved Surface Curb, binding ring, cover slab and porous concrete

Supply, delivery, fabrication and placing in position of RTS rods for reinforcement for binding ring, plasters, roof slab and well curb including cost of binding and as directed by TWAD Board Officers. As per bar bending schedule

Plastering with CM1:4 (one cement and four sand) 12mm thick including cost of materials, labour charges for finishing, curing etc., complete and as directed TWAD Board Officers. Well steining inside,Top of porous finished smooth

Plastering with CM1:3 (one cement and three sand) 20mm thick including curing etc., complete and as directed TWAD Board Officers. ,Well steining Outside

Supply, delivery and fixing in position 50mm thick RCC manhole coverslab of size 0.6 X 0.6m with necessary reinforcement and MS angle of size 50mmX 6 mm thick fixed in alround the edges of the slab complete and as directed by the TWAD Board Officers.

Supply and delivery of PVC Moulded CI steps in position of 30cm c/C in staggered manner and as directed by the TWAD Board officer

Providing ventilating arrangements by fixing in position 100mm AC cowl and as directed by departmental officer

Labour charges for putting bore holes of size 3" to 4" in river bed in sandy and other loose soils using hand boring sets including the cost of hire charges, conveyance charges of hand boring sets, collection of soil sample at frequent intervals and as directed by TWAD Board Officers.

Providing for cutting edge made out of MS Angle of size 75x75x6mm thick welded together and as directed by departmental officer

Colour washing two coats over one priming coat of white cement using cement paint for the outside of well plastered surface and side of the roof slab.

Plugging the bottom of the well with coarse sand of approved size and grade as directed by TWAD Board officers

Painting TWAD emblem on the Side Wall as directed by TWAD Board officers

Trail pit

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