Providing 200mm Borewell With Pipe line Extension at Ammanpettai ONGC Road in Veppathur Town Panchayat.

Drilling of Borewells anywhere in Tamilnadu including transportation from one place to another with in Tamilnadu in alluvial soil sedimentary strata of clay and sand stone shale pebbles boulders etc. By first taking a pilot bore of 140 mm/150mm/200mm dia and then enlarging to required dia direct or reverse rotary mud circulation method using rotary rigs, fuel, labour and drilling bentonite and water required for drilling at site ( Site will be shown by the TWAD Board Officers) including construction of mud pit. (A) Upto 60 mt. Depth ending below ground level

(B) From 60 m upto 90 m Depth ending from gl

Reaming 140/150/200mm dia pilot bore to 300mm dia bore as directed by the TWAD Board Officer. (A) Upto 60 mt. Depth ending below ground level

(B) From 60 m upto 90 m Depth ending from gl

Supply of the following casing pipes of ISI approved quality with wall thickness not less than 7.5mm to 8.5mm with PVC couplers and cement Paste etc. Complete and including packing the annular space with pebbles quality and size of pebbles and the PVC pipe should be approved by the departmental officer.TWAD P-17 (A) Plain Pipe CM

(B) Ribbed screen pipe

(C) 200mm dia OD PVC end cap

Labour Charges for inserting 150 mm/200mm/250 mm dia (M.S. Casing pipes assembly with slots or with out slots) in the drilled hole including welding the joints etc., complete and supplying and packing the annular space with pebbles of size and quality as approved by the Executive Engineers of TWAD Board.

Charges for developing the Borewell with air compressor of 600 CFM capacity (Minimum 8 Hours) including transportation, labour and fuel charges for compressor as directed by TWAD Officers and conducting yield test by 'V' notch method.

Supply and delivery of clear water vertical wet type submersible pumpset suitable for 150mm dia borewell conforming to IS 8034/2002 with latest amendments and BEE 3 Star Rated capable of discharging noted LPM against head of water column due to all causes. The pump shall be with stainlesss steeel shaft and dynamically balanced bronze or Cast SS impeller, brass screws and CI FG 200 grade pump bowl/difuser with ISI mark. The pump shall be directly coupled to a continuos rated two pole suitable wet type vertical squirrel cage induction motor asper IS9283 suitable for operation in AC 3 phase 415 V+/- 10 %, 50 HZ +/- 5 % {7.5HP (50lpm x 225m)} TWAD P-90