Restoration of rain damages of LWSS Gandhiri Phase-Ist under JSV Sub Division Fatehpur in Tehsil Fatehpur Dsitt. Kangra H.P. SH- Drilling, Lowering and Development of 1 NO. Mini Tubewell 120 mtr deep 200 mm dia in Village Gandhiri Near LWSS Gandhir

Transportation of Rig along with allied accessories etc. complete including erection and levelling at site, through all kinds of roads, approaches fields etc. in all leads and lifts upto site of work complete in all respects as per the directions of the Engineer - in-Charge.

Drilling of bore of 200mm dia as per specifactions laid down in IS :2800-1991 (Part-I) with up-to-date amnedments, if any,with ODEX / percusion Rig, Direct Rotary .or combination etc. with system of simultaneous lowering to 175mm dia nominal bore 6.4mm thick MSERW fincut casing pipe which will be welded together using 2.5mm of 3.25mm dia Advani Over linkon electrode with one plain and the other end chamfered to 50 degree removing paints on the area to be welded including of the coat of bio-degradable and non toxic foams flush confirming to IS 4270-2001 with up-to-date amendements,if any, in all kind of soils,boulders,rocks,collapsible strata,saturated soils,artesian conditions including the cost of all consumable stores,water,fuel,lubricants and other accessories etc. complete in all respects as per the directions 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.

Supply and lowering of IS marked Electric Resistance Welded M.S.pipe 150mm dia nominal size housing, 5.00mm thick having screwed end,socketted, confirming to I.S 4270-2001 with up-todate amendments, if any ,about 4 mtrs to 7 mtrs in length, welded without any circumferential joints,into bore hole in vertical position including cost of all scaffolding derricks,poles,clamps embedded in foundation etc. including cost of all cutting,threading and welding of pipes etc. within all leads and lifts, complete in all respects as per the directions of the Engineer -in-Charge.

Supplying and packing of gravel, consisting of hard quartz or other suitable material with an average specific gravity of not less than 2.5,not containing more than 2% by weight of thin flat of elongated pieces, shall be of subrounded to rounded grains with minimum angular features of size 2-3.35 mm, shall be free from impurities such as shafe,shale,mica,felspar,clay,sand,dirt loam,haematte and organic material as pe IS :4097-1967 with upto date amendments, if any, around intake of tubewell with minium thickness of around screen generally 100 mm to the entire depth of the bore as per 2800(Part-I ) 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.

Development of tubewell by back washing method,with air compressor of minimum 750 CFM capacity, pumping pipe of 200 mm size and air line of minimum 65 mm size or with other suitable method,till the well is thoroughly developed as per clause 4.2 of IS 11189-1985, with upto date amendments,if any, complete in all respects as per direction of the Engnieer -in- Charge.

Development of tubewell by continuous over pumping method,with VT pump/submersible pumps 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 VT/ Submersible pump continuosuly for 8 hours in the presence of officer not less than the rank of Assistant Engineer.

Testing the verticality of the tubewell as per clause 4.3 of IS 2800 (Part-II) 1979 with upto date amendments, if any, using plumb or plunger 6 mm smaller in dia within the inside diameter of the well casing.The results of the verticality test shall be recorded on proforma shown in Appendix A of IS 2800 (Part-II) 1979 with up-to-date amendments, if any, as appended with the tender documents and handed over complete in all respect as the directions of the Engineer -in- Charge.