Detail Estimate of providing Estate Water Supply and Fire Fighting Services in ITI at Village Naggal in Hasanpur in Distt Ambala Providing AND installing 1 No deep tubewell of size 250 BY200mm upto 250 Mtr depth below ground level by Reverse rotary r

Amount

Drilling of 609.60mm dia bore by hydraulic rotary drilling (reverse circulation method) according to ISI specification No. 2800-1991 (Part-I) as ammended upto date and modified to extent of the specification attached with this schedule of items of work in all kinds of soils and boulders upto 125 mm dia except rocky strata including the cost of all consumable stores, fuel, oil, soil stabilizing material and transportation of rig and other accessories to the site of proposed bore and back complete to the satisfaction of the Engineer-in-charge.

Supplying and lowering 273.10mm outer dia ERW steel pipes as per IS 4270/1992 as ammended upto date, duly ISI marked for housing pipe in 4 to 7 Metres random length with 88.90mm of threaded ends (8 threads to an inch or 25.40mm) manufactured out of 8.00mm thick M.S. plates length with required number of M.S. socket 177.8mm with inside thread to match the pipe threads and made out of M.S. plate in to borehole in vertical position including cost of all scaffolding, derricks, Jim, poles, tools and plants, ropes, gays M.S. clamp embedded in foundation etc. complete in all respects to the satisfaction of the Engineer-in-charge of the work including cost of all cutting, threading of pipe welded, where required and all sockets. The pipe shall be paved with extra rust paint & covered tightly with polythene.

Supplying and lowering 219.10mm outer dia ERW steel pipes as per IS 4270/1992 as ammended upto date, duly ISI marked for housing pipe in 4 to 7 Metres random length with 88.90mm of threaded ends (8 threads to an inch or 25.40mm) manufactured out of 6.40mm thick M.S. plates with required number of M.S. socket 177.80mm with inside thread to match the pipe threads and made out of M.S. plate in to borehole in vertical position including cost of all scaffolding, derricks, Jim, poles, tools and plants, ropes, gays M.S. clamp embedded in foundation etc. complete in all respects to the satisfaction of the Engineer-in-charge of the work including cost of all cutting, threading of pipe, welding, where required and all sockets. The pipe shall be painted with & corrisive paint & covered tighly with polythene.

Providing & fixing for lowering 200 mm i/d ISI marked stainless steel (SSC) cage as amended upto date.

Supplying, fixing and lowering reducing socket as per IS:226/1975 as ammended upto date 273.10mm outer dia, x 219.10mm outer dia with 8 threads per inch or 25.40mm, to be made out of M.S. plate with internal threads, suitable for jointing 273.10mm outer dia pipe and 219.10mm outer dia ERW pipe as per item said above.

Providing and fixing in position suitable bail plug hook of 219.10mm as per IS 226/1975 as ammended upto date, including the cost of M.S. Screwed sockets etc. complete in all respects, to the entire satisfaction of the Engineer-in-charge of the work.

Supplying and packing graded gravel of size as per ISI 4097/1988, as amended upto date and specification attached with this schedule of item of work. The gravel should be free from dust, dirt or vegetable matters. Packing to be done from the housing pipe to the bottom of liner all around in the bore and will be placed after liner and housing pipes have been lowered and suitably clamped. Thickness and size of the gravel packing will be designed and directed by the Engineer-in-charge strictly as per relevant ISI.

Supplying and fixing well threaded M.S. cap for 273.10mm outer dia M.S. pipe as per ISI 226/1975 as amended upto date to the satisfaction of the Engineer-in-charge.

Supplying as per IS: 226/1975 as ammended upto date deodar wooden box made of 20mm thick wood size 60cmx75cm with lid and locking arrangement etc. for preserving the strata samples received from the bore as and when desired by the Engineer-in-charge.

Development of tubewell according to clause 9.3 of IS: 2800-1991 (Part-I) as amended upto date and specifications attached and as directed by the Engineer-in-charge of the work including the cost of all consumable stores, fuel, oil, compressors, pumps and machinery etc. as required for this work When developed by compressor of 800 CFM, 800 PSI and suitable rating for .

When development is done with a pump of discharge 1.5 times than the operational discharge.

Electric logging of tubewell.

Providing clay seal of thickness 4.00 m or above, consisting of balls of local clay or bentonite mud, to be placed in the annular space around the assembly. The clay seal should be provided at a level of minimum 25.00 m above the top most screens, depending on the logging results. This item is to be included whereever if is necessary).

Supplying and fixing 273.10 mm M.S Clamp as per IS 226/1975 as amended upto date for supporting the pipe.

Providing and fixing centralizer guides (centralizer) fitted to the well assembly except the housing pipe, at bottom and at a spacing of 12Mtr centre to centre, to keep the assembly in centre of the bore hole as per approved design and specifications, confirming to IS : 226/1975.