Borewell & Tubewell Works Tenders

Drilling of 125mm (4 1/2”) nominal dia vertical borewells anywhere in Tamilnadu in all formations, suitable for down the hole hammer drilling such as medium hard rock to hard rock formation, consolidated formation etc and drilling over burden to a dia not less than 200mm including insertion of 165 mm PVC casing pipe, couplings caps and other relevant materials required upto the depth as directed by the Engineer or his representative including grouting of cement 25kg (minimum) up to the depth of over burden are including borewell development flushing of borewell at a pressure 7kg/cm2 (100 lb per square inch) including yield test, crew charges, cost of consumables, transportation charges of casing pipes and all other materials including assembling complete to the satisfaction of the Engineer and as stipulated in the technical specification. The entire works should be carried out as per IS 2800 Part I & II / 1979. Finished dia of borewells shall not be less than 145mm etc., complete asper standard specifications

Development of tube well in accordance with IS : 2800 (part I) and IS:11189, to establish maximum rate of usable water yield without sandcontent (beyond permissible limit), with required capacity air compressor,running the compressor for required time till well is fully developed,measuring yield of well by “V” notch method or any other approved method,measuring static level & draw down etc. by step draw down method,collecting water samples & getting tested in approved laboratory, i/cdisinfection of tubewell, all complete, including hire & labour charges ofair compressor, tools & accessories etc., all as per requirement anddirection of Engineer-in-charge.

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

Labour only for taking out of three phase submersible pumping set from the tube well with pipe line assembly ,electrical,cable ,testing etc.complete including disconnecting the electrical cable from pump & starter .3HP to 7.5 HP -Depth upto 150mtrs.

Tube Well Construction of tube-well from ground levels and upto 100 Meter depth and above to accommodate housing and assembly pipe of following sizes in all types of alluvium strata by percussion/ rotary drilling method and with gravel as per IS:4097-1967 and packing as per IS:2800 (Part I -& II) 1979 as amended upto date (the work includes the cost of gravel & its primary packing and packing during development, lowering of housing & strainer assembly pipes, with supply and wrapping of coir-rope, wherever necessary, for arresting fine sand particles. The work will not include cost of housing pipe and strainer pipe assembly and development work, but work would be completed after obtaining sand free water). 200mm –do-.

Boring with 100 mm diameter casing pipe for hand pump / tubewell, in all soils except ordinary hard rocks requiring blasting, including removing the casing pipe after the hand pump / tube well is lowered and tested : 18.42.1 Up to 6 metres depth