MLACD - 2023-24

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 150 mm/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

From 60 m upto 90 m Depth ending from ground level

From 90 m upto 120 m Depth ending from ground level

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

From 60 m upto 90 m Depth ending from ground level

From 90 m upto 120 m Depth ending from ground level

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. - 150mm dia OD PVC Plain casing Pipe

150mm dia OD PVC slot casing Pipe

150mm dia OD PVC end cap

Labour Charges for inserting PVC Casing pipes assembly (with slots or without slots) in the drilled hole including jointing the pipes with PVC Couplers with Cement paste etc., complete supply and packing the annular space with pebbles of size and quality as approved by the executive engineers

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 Board officers and conducting yield test by 'V' notch method.

supply and delivery of 2 HP Single phase Submersible pumpset of duty condition 20 lpm x 150 m as per IS 8034 without panel board etc complete as per standard specification.

Supply of Single phase Pannel board suitable for 2HP with two level guard and auto start etc complete as per standard specification.

Supply and delivery of Flat cable suitable for submersible pumpset 2.5sq.mm

Labour charges for the errection of 2HP submersible pumpset in the Borewell including fixing and jointing submersible cable with proper clamps upto the starter to required depth and also fixing of riser pipes to the required depth walls errection clamps pressure gauges up to the exterior wall of pumping room and errection of panel board consisting of DPICN switches starter volt meter ammeter, Three Pilot ( Indicating ) lamps capacitor single phasing preventer water level guard and laying and jointing the cable s and twin earthing as per IE rules etc complete and testing to the pumpset and trial run for 10 Days.

Supplying and fixing of pipe and accessories ISI make including cutting and threading cost and conveyance of all charges etc complete as per standard specification. - UPVC 32mm pipe PWD Schedule of rates

Nylon Rope for Bore-well

Supply and run of 2 of 4 sq.mm (56/0.3) PVC insulated SC unsheathed Cu.Conductor of 1100V grade in 25mm dia GI pipe (Class 'B') suitably bent at both ends with necessary angle iron upright and end supports for mains SD 70

Supply and fixing of 32 Amps DP Switch of 500V with metal clad with fuse and neutral (Side Handle) on suitable TW Board with PWD Earthing SD 143

Supply and fixing of TNEB meter Board suitable for 32A Three Phase service connection with 32A Fuse unit (500V) 32A neutral link and earth link (1" x 1/8" Copper flat) on TW plank of size 375mm x 300mm x 19mm with supporting TW reepers of 1" thick an either side with painting with suitable bolt and nuts for fixing the TW plank on wall with earth connection and inter connection with 7/20 PVC insulated copper wire from EB meter to fuse unit. SD127

VELAYUTHA THEVAR VEERAPPAN