Sinking of new borewell at R.S. No.89/22 in lieu of defunct borewell at Village Key Unit at Thondamantham Village in Villianur Commune, Puducherry.

Amount

Drilling of borewell any where in Pondicherry including transportations in alluvial soil, sedimentary strata of clay, sand stone, shale, pebbles, boulders etc. by first taking a pilot bore of 140mm / 150mm / 200mm and then enlarging to required dia by direct or reverse rotary mud circulation method,including fuel, labour for drilling, bentonite mud, water required for drilling at the site, construction of mud pit (water available within a lead of 1.5Km) using rotary rig. -Upto 60 mts depth ending below ground level.

Reaming from 140/150 mm dia pilot bore to 300mm dia bore. Upto 60 mts depth ending below ground level.

Drilling 200mm dia borehole in hard rock formation by DTH method (Down the hole hammer) inside the already inserted 200mm UPVC casing pipe.The entire column is to be cleaned at site.The rate includes hire charges for the power rig for drilling the bores,the cost of fuel charges,transporting to and fro the power rig flushing the bore using compressor providing danger lights during night time etc.,complete.

Supplying of UPVC plain casing pipe for borewells (Finolex /Jain / Supreme / True bore / Nandi) conforming to I.S. 12818 -1992 with relevent amendments with class designation 'CM' and with minimum wall thickness 10mm including transportation and stocking at site -200mm dia

Lowering of UPVC plain casing pipe / ribbed screen slotted pipes into the borewell including cost of cleaning material, fixing of M.S centering guide size of 25mm x 3mm thick suitable for 200mm dia UPVC pipe, including cost of labour for positioning of assembly for lowering purpose using rig.

Providing and fixing M.S. top cover suitable for UPVC pipes including the cost of materials and labour etc.