(SH Drilling, Lowering and development of 1 No. T/Well 300 Mtrs deep at Singan) under CRF

Transportation of 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 of bore as per specification laid down in IS 2800-1991 (part-I) with upto date ammendments,if any,with Direct Rotary Rig or combination drilling Rig. starting with 500-450 mm dia M.S pipe reduced to 450-400 mm dia M.S pipe confirming to IS 4270-2001 with up-to-date ammendements ,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. including logging of bore well complete in all respectsd as per the directions of the Engineer -in -Charge.

Drilling and lowering of M.S casing pipes confirming to IS 4270-2001 with up-to-date ammendments,if any, of suitable sizes as mentioned above,from 0-30 mtrs below ground level within all leads and lifts.

Drilling and lowering of M.S casing pipes confirming to IS 4270-2001 with up-to-date ammendments,if any, of suitable sizes as mentioned above,from 30-60 mtrs below ground level within all leads and lifts.

Drilling and lowering of M.S casing pipes confirming to IS 4270-2001 with up-to-date ammendments,if any, of suitable sizes as mentioned above,from 60-90 mtrs below ground level within all leads and lifts.

Drilling and lowering of M.S casing pipes confirming to IS 4270-2001 with up-to-date ammendments,if any, of suitable sizes as mentioned above,from 90-140 mtrs below ground level within all leads and lifts.

Drilling and lowering of M.S casing pipes confirming to IS 4270-2001 with up-to-date ammendments,if any, of suitable sizes as mentioned above,from 140-190 mtrs below ground level within all leads and lifts.

vi) Drilling and lowering of M.S. Casing pipe conforming to IS 4270-2001 with up-to-date amendments,if any, of suitable sizes as mentioned above,from 190 to 240 mtrs below ground level within all leads and lifts.

vi) Drilling and lowering of M.S. Casing pipe conforming to IS 4270-2001 with up-to-date amendments,if any, of suitable sizes as mentioned above,from 240 to 290 mtrs below ground level within all leads and lifts.

vi) Drilling and lowering of M.S. Casing pipe conforming to IS 4270-2001 with up-to-date amendments,if any, of suitable sizes as mentioned above,from 290 to 300 mtrs below ground level within all leads and lifts.

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 300 mm dia nominal size housing, 8 mm thick having out side dia mtrs. 323.90 mm bevelled edge 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.

Providing & Lowering of IS marked electrical resistance welded M.S slotted pipe 300mm dia nominal size housing 8mm thick heaving outside diameter 323.90mm screwed and socketted confinming to IS 4270-2001 slot size 1.5x75mm welded upto date ammendements if any about 4-7 mtrs in length welded without any circumfererincial joints into borewhole in vertical position including cost of all scufolding derricks poles clambs embeded in foundation etc. including cost of all cutting,threading and welding of pipes etc. within all leads & lifts, complete in all respects as per the directions of the Engineer -in-Charge.

Providing and fixing M.S. taper / reducer as per lengths approved by Engineer -in-Charge ,the material of M.S taper/reducer shall be equivalent to parent pipe material and shall conform to chemical composition as per 4270-2001 with upto date ammendments ,if any, complete in all respect as per directions of the Engineer -in -Charge.

Supply and lowering of IS marked Electric Resistance Welded M.S.pipe 200 mm nominal size housing, 6.40 mm thick having out side dia mtrs. 219.10 mm bevelled edge confirming to I.S. 4270-2001 with up-todate ammendments, 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 & lifts, complete in all respects as per the directions of the Engineer -in-Charge.

Providing & Lowering of IS marked electrical resistance welded M.S slotted pipe 200mm dia nominal size housing 8mm thick heaving outside diameter 219.10mm screwed and socketted confinming to IS 4270-2001 slot size 1.5x75mm welded upto date ammendements if any about 4-7 mtrs in length welded without any circumfererincial joints into borewhole in vertical position including cost of all scufolding derricks poles clambs embeded in foundation etc. including cost of all cutting,threading and welding of pipes etc. within all leads & lifts, complete in all respects as per the directions of the Engineer -in-Charge.

Providing and fixing M.S centralized guides at suitable spacing for each tube well as per IS 226-1991 with up-to-date amendments if any, within all leads and lifts ,1x4Nos. completed in all respects as per the directions of the Engineer -in-Charge.

Supplying ,lowering and fixing in position IS marked mild steel bail plug of 200 mm/ 300 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 per directions of the Engineer -in- Charge.

Pdg. and fixing in position threaded iron cap with locking arrangements of approved design to prevent foreign matter from getting into bore hole,as required, 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 of not less than 2.5, not containing more than 2% by weight of thin flat of elangated 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, felspar, clay, sand,dirt loam,baematte and organic material as pe IS 4097-1967 with upto date amendments, if any, around intake of tubewell with minimum thickness of shroud 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 anebdnebts, if any, complete in all respects as per direction of the Engnieer -in- Charge. Above 150 mtrs b.g.l.

Development of tubewell by continous 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 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 continously 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 ammendments, if any, as appended with the tender documents and handed over complete in all respect as the directions 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.

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