Providing New Borewell with Power Pump at Ward No 41 Maniammai Street,Sangothiyamman koil Street Zonal office,Alavattamman Koil Park,Tellus avenue in Zone lll

Conducting Geophysical survey, quality and quantity test and transportation charges etc, (This includes labour charges in the field, rent of the vehicle for reaching the place, rent of the instrument and excluding charges for the geologist)

Drilling of Borewells anywhere in Tambaram city Municipal Corporation 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 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 (as per Tamilnadu water supply and drainage Board Lr.No.F.251112/Drilling Rate/AE 4/CoM/2021/Dt 27.04.2022)

150mm dia CM pipe (unique code WD -M0028)

150mm RS Pipe (Slotted Pipe)(unique code WD -M0029)

200mm CS Pipe (Covering Pipe)(unique code WD -M0031)

supply and delivery of clear water vertical wet type submercible pumpset suitable for 150mm dia borewell conforming to IS 8034/2002 as amended thereafter and BEE 3 star rated capable of discharging noted LPM against head of water column due to all causes.The pump shall be with stainless steel shaft and dynamically balanced bronze or cast SS impeller ,brass screws and CI FG 200 Grade pump bowl /diffuser with ISI mark.The pump shall be directly coupled to a continous rated two pole suitable wet type vertical squirred cage induction motor as per IS 9283/1995 as amended there after ,suitable for operation in AC three phase 415V+/- 10% ,50 H2 +/- 5% without panel board (TWAD SOR 2025-26 Page No 119 Clause 3.1 Unique code WD -M1632)(75 pmx175m 5HP)

Labour charges for the erection of submersible pump set in bore well/open well including fixing and jointing submersible cable with proper clamps up to the starter to required depth and also fixing of riser pipes to the required depth valves erection clamps, pressure gauges up to the exterior wall of pump room and erection of panel board consisting of TPICN switches starter, voltmeter, Ammeter, three pilot (indicating) lamps capacitor single phasing preventer, water level guard and laying and jointing the cables and twin earthing as per IE rules etc., complete and testing the pump set and trail run for 10 days. (TWAD SOR 2025-26 Page No 225-226 ,ll Rates of works (E -Miscellaneous Worksitems Unique code 17 c WD -W0872)above 5.00HP to 10.00HP

Supply and delivery of Star-Delta starter confirming to IS 13947, IEC60947-1 and as amended thereafter with suitable KW rating for operation in AC/ Three Phase/50HZ (+/-5%) and 415V (+/-10%) including 3 pole magnetic contactor with under voltage release - 3 Nos., CT operated Ammeter (65 mm dia) with suppressed scale, Voltmeter (65mm dia), Voltmeter selector switch, Miniature circuit breaker, Thermal Overload relay, Air Break contactors suitable for next Stan- dard higher KW rating, Single phasing preventor, dry running preventor and On/Off Push button switches, wiring with 1 sq.mm/4 sq. mm copper pvc insulated cable, powder coated vermin proof box, including the capacitor (the cost of capacitor is to be taken separately).(TWAD SOR 2025-26Page No 120 clause 11.20 Unique code WD -M1915)7.50HP

Supply and delivery of 63mm dia HDPE pipes PE 100 AS PER IS/4984/2016 (Pre -Comp[ouded Resin) PN 8 including cost and conveyance of materilas to work site etc completed as per satndard Specification.(TWAD SOR 2025-26 Page No 16 Uniquue code No WD -M0205)