Water Supply And Sanitation Department Tender

TUBEWELL

Providing and installing 200 mm i/d straight tubewell drilling of 500 mm (20) of suitable size borehole where in stony strata/boulders are some times encounted in this area while dirlling which makes drilling purely by Reverse rotary mehtod immpossible. While mostly is done by Reverse rotary method, but when stony/boulder strata appear, then other methods i.e. direct rotary etc. are used. So drilling by any suitable rig in this area including the cost of consumable store fuel, oil & transportation of rig to the site of proposed bore. Complete in all respect upto full depth (0 to 180 mtr depth BGL). 1. Erection and dismantliing of boring plant including all arrangement for the transportation of the boring equipment to site of work from the store of contractor at site and back are to be made by the contractor at his own cost. All rates should be quoted for supplying the material at site of work . Pits for collection of water and water for drilling tubewell be arranged by the firm / contractor at site at his own cost. 2. In case the bore is converted into a tubewell payment of bore shall be made up to the bail plug plus margin (7% of main bore drilling or as actual as per field requirement whichever is less) required for sustaining the main bore. The test bore beyond margin shall be paid at the rate of test bore drilling"

Supplying, lowering of MS Pipe as per IS:4270-2001 including MS sockets having dimensions as per IS code duly welded with MS electrode to have extra strength to lower the pipe into tubewell bore.