PROVN OF 04 NO BORE WELLS FOR WATER SUPPLY IN AOR OF GE MINNIEBAY, SRI VIJAYA PURAM

M&L for trail bore and drilling with percussion/rotary/mechanical ring bore hole at the site from ground level to the depth shown below, suitable size 180 mm bore casing PVC pipes upto 30mtr appro complete all as specified and directed by engr-in-charge. Note:- Lowering, PCC, Pea gravel shall be measured under relevant items of sch "A".

Drilling bore hole vertically down suitable for lowering casing/ slotted pipe of size 180 mm bore initially up to a depth of 30 M approx from ground level including necessary annular space for gravel packing using rigs and other machinery for rottery or DTH process or combination of both in/ through any strata such as loams and, red clay, moorum, weathered rocks, rock, hard rock, lightly fractured rock, top soil, sandy clay, debbuled soil, loamy soil or any other geological formation and construction of pcc platform (casing/ slotted pipes and pee gravel will be measured and paid sperately). Quantity catered is meant for 4 in Nos bore wells.

Drilling bore hole vertically down suitable for lowering casing/ slotted pipe of size 140 mm bore beyond of 30 M approx but not exceeding 100 Mtrs including necessary annular space for gravel packing using rigs and other machinery for rottery or DTH process or combination of both in/ through any strata such as loams and, red clay, moorum, weathered rocks, rock, hard rock, lightly fractured rock, top soil, sandy clay, debbuled soil, loamy soil or any other geological formation and construction of pcc platform (casing/ slotted pipes and pee gravel will be measured and paid sperately). Quantity catered is meant for 4 in Nos bore wells.

Supplying, lowering and fixing into bore hole PVC housing pipes jointed duly with socket and spigot of each casing pipe of size 180 mm nominal bore, of pressure rating 6 Kg/Sq cm complete all as specified and directed. Note : Depth of bore and depth of pipe can vary as per rqmt and availabilityof water

Supplying, lowering and fixing into bore hole PVC pipes perforated 140 mm nominal bore,of pressure rating 6kg/sqmm, complete all as specified and directed.

Supplying, lowering and fixing into bore hole slotted PVC pipes perforated 140 mm nominal bore,of pressure rating 6kg/sqmm, slot size 1 to 2 mm complete all as specified and directed.

Developing the tube well by means of air compressor unit of adequate capacity not less than 250 PSI and over pumping with the help of suitable size of pump untill sand free water is obtained and accessories and sand by DG set in order to ensure continuous pumping for 02 hrs & yield test by 'V' notch method. (Note :- Rate quoted will include provision of all T&P required for this test to be provided by the contractor)

M&L for carrying chemical / bacteriological analysis and portability test of water obtained from bore well from Andaman state board/ MCD/ approved Micro Engineering and testing lab and submitting the report in duplicate to Engr-in-charge, complete all as specified and directed.

M&L for GI heavy grade column pipe of 50 mm bore, cut into 3.0 mtr length incl providing of threading on both sides and lowering into borewell along with GI heavy duty long socket complete all as directed

Supplying, installation, commissioning and testing 3 phase submersible pump 5 HP 415 Volts AC 50 Hz 400 LPM, 125 mtr head and discharge suitable for 50 mm dia column pipe of bore well complete all as specified and directed. Make :- Kirloskar/ KSB/Crompton Greaves. Note:- Depth of lowering of pump shall be as recommended after yield test for safe yield.