Drilling Lowering of assembly and development of 175 mm dia bore well Mini Bore Tubewell 7 eanch dia 125 mtrs deep in the complex of Gaushala in Village Pambra in Tehsil Ghanari Distt Una HP Under CRF

Amount

Transportation of suitable truck mounted RC/DR drilling Rig along with allied accessories etc. complete including errection and levelling at site, through all kinds of roads, approaches fields etc. in all leads and lifts completed in all respects as per the directions of Engineer - in-Charge.

Drilling bores of 200/250 mm dia as per IS 2800: 1979 using RC/DR method method required for drilling in collapsible strata conglomerate, boulders, pebbles, gravels, silt, clay, etc including cost of attachments , extractable casing,consumable stores, bits, water, POL gravel pack in annular space etc.complete in all respects as per direction of the Engineer-in-Charge.

Collection, preservaion and display of suitable size sample box with top lid and locking arrangement till handing over of the tube well to the department complete in all respects as per direction of the Engineer -in-Charge.

Supplying and lowering of IS marked 175 mm dia N.B 5.40 mm thick fincut MSERW casing pipes asper IS 4270-2001 and requirement of ODEX attachment from approved manufactures complete in all respect as per direction of Engineer-in-Charges.

Providing slotting arrangements as per IS 8110/1994-997slot size 1.57x75mm and Lowering of 125 mm dia MS slotted pipe as per IS 4270-2001 with upto date amendments, welded and joints into bore hole in vertical position including cost of all cutting threading & welding of pipe etc. with in all leads & lifts, complete in all respects as per direction of Engineer-in-Charge. (10x9).

Development of tube-well / bore well with 1000 CFM with air compressor through V-notch and disinfect ion etc. as per IS-2800 :1979 including transportation of equipment etc. and as per direction of Engineer-in-charges.

Development/ establishment of of discharge of bore well and yeild testing with submersible pumps through V-notch of suitable capacity not less than double the discharge established by the compressor method/ design discharge, untill the well is sand free as per IS-11189-1985 with up -to- date amendments, if any, complete in all respects as per directions of the Engineer -in- Charge .The draw down and discharge to be established by running the Submersible pump continously for 8 hours in the presence of officer not less than the rank of Assistant Engineer.

Supplying ,lowering and fixing in position IS marked mild steel bail plug of 175 mm diameters with "U" hooks as per IS 2800-1991 with up -to date amendements ,ifany, within all leads and lifts, complete in all respects as per directions of the Engineer -in- Charge.

Supplying and packing of gravel , consisting of hard quartz or other suitable material with an average specific gravity or not less than 2.5 , not containing more than 2% by weight of thin flat of elongated pieces, shall be of sub rounded to rounded grains with minimum angular features of size 2-3.35 mm, shall be free from impurities such as shafe, shale, mica, feldspar, clay , sand, dirt loam, haematte and organic material as per IS: 4097-1967 with upto date amendments , if any around intake of tubewell with minimum thickness of shroud around screen generally 100mm to the entire depth of the bore as per 2800 (part-1 ) 1991 with upto date amendments , if any with in all leads and lifts complete in all respects as per direction of the Engineer-in-charge.

Dismentalling of Rig or other allied accesssories after completion of job within all leads & lifts, complete in all respects as per the directions of the Engineer -in- Charge.

Handing over of the tubewell in complete shape as per appendex "B" of clause 7 of IS 2800 (Part-II) -1979 with upto date ammendmentes if any, as appended with the tender documents, in laminated form , in triplicate, complete in all respect as per the directions of the Engineer-in-Charge.

HIMANSHU CHAUHAN

ABTAR SINGH AND COMPANY

H.N.SINGH AND COMPANY