National Hydrology Project SH Drilling of 2 Two Borewell by Direct Rotary Method for shifting of borewells coming under the alignment of Four Lane road Project from Pinjore to Swarghat at Sandholi and Bagbania under Hydrology Sub Division Nahan

Amount

Transportation of suitable truck mounted Direct Rotary drilling rigs along with necessary accessories etc. to the site of work and erection of rig including leveling etc. complete in all respects as per decision of Engineer-in-charge/ STA (Hydrogeology)/ Hydrogeologist.

Drilling bores of 300 mm dia as per IS 2800: 1979 (IS 2800 (Part-I) : 1991 Re-affirmed 2001 & IS : 2800 (Part-II) - 1979 Re-affirmed 2008) using Direct Rotary drilling methods required for drilling in collapsible strata comprising of boulders, pebbles, gravels, sand, silt, clay, etc including cost of attachments , extractable casing, electric logging, consumable stores, bits, water,POL, gravel pack in annular space etc.complete in all respects as per direction of the Engineer-in-Charge/ STA (Hydrogeology)/ Hydrogeologist.

Supplying and lowering IS marked 125 mm dia PVC casing pipe medium class 5 mm thick screwed and socketed as per IS:12818-1992(Part-I) with upto date amendments cost of all cutting, factor threading, wherever required, in lengths of meters including transportation charges.

Collection and preservation of soil samples in polythene bags complete in all respect as per direction of Engineer-in-Charges/ STA (Hydrogeology)/ Hydrogeologist.

Development of borewell and yield testing with air-compressor through V notch and disinfection etc. complete in all respect as per IS 2800-1979 and as per direction of Engineer-in-Charges/ STA (Hydrogeology)/ Hydrogeologist.

Providing slotting arrangements as per IS 8110/1994-1997 (IS 8110:2000) slot size 1.57 (1.6) x 75 mm having percentage of slot open area in between 15 and 22 percent and Lowering of 125 mm dia PVC slotted pipe as per IS 12818-1992(Part-I) with upto date amendments, welded and joints into borehole in vertical position including cost of all cutting threading of pipe etc. with in all leads & lifts, complete in all respects as per direction of 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 mm, shall be free from impurities such as shale, mica, feldspar, clay , sand, dirt loam, organic material etc. as per IS: 4097-1967 with upto date amendments if any around intake of tubewell with minimum thickness of shrouding around screen generally 75 mm 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. (4x80)(in 125mm dia rotary Hand pumps)

Protective cover

Excavation in foundation, trenches in earth work in all kinds of soil such as Kankar murram, conglomerate & decomposed of loose soil by pick jumper work, blasting in soft not more than 3 mtrs clear from the edge of excavation and then ramming the stacked soil in 15cm layer when required in to plinth sides of the foundations and consolidating each deposited layer by ramming and watering and then disposing of all Surplus excavated earth in all leads and lifts as per direction of the Engineer-in-Charge.

Providing & laying cement concrete having strength of M 15 mixed design aggregate mechanically mixed and vibrating and curing complete excluding cost of from work including carriage of material in all leads and lifts and as directed by the Engineer-in-Charge.

Providing, Manufacturing and fixing steel protection housing for DWLR with cross L-hooks for 152 mm dia Piezometer locking arrangements i/c priming and painting as per drawing in all kinds of leads and lifts as per the direction of the Engineer-in-Charge.

Protection work by provoding fencing and signboard around the Piezometer as per the drawings shown in Bid Document

M/S Sharma Enterpirses (BID ID -493316)

H.N.SINGH AND COMPANY (BID ID -471834)

ABTAR SINGH AND COMPANY (BID ID -491680)

B. S. Enterprises. (BID ID -491738)

JASPREET SINGH (BID ID -491675)