Borewell & Tubewell Works Tenders

Construction of 1nos production wells including scientific source finding through consolidated and unconsolidated rock with down the hammer drilling rig or combination rig with PVC pipe and installation of submersible pump set with all acessories Labour for drilling a perfectly vertical bore hole of specified dia for a specified depth below ground level through consolidated and unconsolidated rock with down the hole hammer drilling rig or combination rig as required to suit the site condition as per the direction of the Engineer in charge including use of own rig with its accessories, tools and plant and consumables etc for lowering of 200mm/150mm dia G.I/P.V.C/M.S casing pipes for housing fitted with socket and with or without well screen as per the necessity for soft, medium, hard and boulder formation (G.I/ P.V.C/ M.S casing pipes if required to prevent collapse of overburden is to be provided by the contractor including lowering and withdrawing after completion of the tube well), 200mm dia to 400mm dia in overburden portion including packing of gravel supplied by the contractor for 400mm dia bore only Drilling of 200mm dia bore 00 mtr to 30mtr

Development of tube well in accordance with IS : 2800 (part I) andIS: 11189, to establish maximum rate of usable water yield withoutsand content (beyond permissible limit), with required capacity aircompressor, running the compressor for required time till well isfully developed, measuring yield of well by "V" notch method or anyother approved method, measuring static level & draw down etc. bystep draw down method, collecting water samples & getting testedin approved laboratory, i/c disinfection of tubewell, all complete,including hire & labour charges of air compressor, tools & accessoriesetc., all as per requirement and direction of Engineer in-charge

18.42.2 Boring with 100 mm diameter casing pipe for hand pump/ tube well in all soils except ordinary hard rocks requiring blasting, including removing the casing pipe after the hand pump/tube well is lowered and tested:Beyond 6 m and upto 12 m depth

Boring with casing pipe for tubewell in all soils except ordinary hard rocks requiring blasting including removing the casing pipe after the tube well is lowered & tested , equipment as requried such as hand boring machine and its accessory, transportation to site and vice versa etc. complete in all respect.

125x100mm dia Tube Well through ODEX Method Supplying all labour and drilling perfectly vertical bore holes in boulder formation areas with down the hole hammer drilling rigs or combination drilling rigs to suit the site condition with deployment of rig, necessary accessories and consumables for a specified depth below ground level including supply of necessary casing shoe, odex tools and plants jointing materials, extra sockets where rquired withdrawing of pipes, lowering the M.S (ERW) pipes and fitting and fixing in perfectly vertical position including cutting and welding for jointing pipes for simultaneous casing lowering in over burden boulder formation till encounter of hard rock and to drill 125mm DTH upto the desired depth as may be necessary, clearing the site and washing bore etc., all complete providing sanitary sealing upto 5 meters depth below gound level as per the direction of Engineer-in-charge.a) Labour for drilling of 125mm dia bore-

Construction of Tube-well upto 100 Meter depth and above in all type of rocks by DTH system and over burden, to accommodate casing pipe of following sizes in all types of soils and over burden including lowering of casing pipes, but excluding cost of casing pipes as per IS : 2800 (Part I & II) 1979 specifications. The work would be completed after obtaining sand free water. The tube well should have a throughout bore as per nominal dia of casing pipe: 200 mm –do-