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

Drilling trial bore with percussion/rotary/mechanical ring bore hole at the site from ground level to the depth 80 mt appro, suitable size 180 mm bore casing PVC pipes upto 20mtr appro complete all as specified and directed by Engr-in-Charge. Note:- PVC Casing 180mm shall be measured under relevant items of sch "A". Quantity catered below is meant for 4 in Nos bore wells.

Drilling bore hole vertically down suitable for lowering casing/ slotted pipe of size 180 mm bore initially up to a depth of 20 M approx. there after reduced to 140 mm bore up to a total depth of 100 M 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, debulled soil, loamy soil or any other geological formation and construction of pcc platform. Note :- Casing / slotted pipes and pee gravel will be measured and paid sperately. Quantity catered below 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 including making slot of suitable size throughout pipe 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 for duration.

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.

Supply & fixing HDPE heavy duty column pipe internal dia 50mm PN 16kq/Sqmm including necessary all fixings complete all as specified and directed.

Supplying, installation, commissioning and testing 3 phase submersible pump 5 HP 415 Volts AC 50 Hz 400 LPM, 100 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.

Supplying, installation, commissioning and testing 3 phase submersible pump 3 HP 415 Volts AC 50 Hz 300 LPM, 100 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.

Supply and fixing submersible cable 3 core flat of size 4 sqmm with multi stranded copper conductor cable complete all as specified and directed.