Provision of New Bore wells in AAI Colony and Non-Operational area at Trichy Airport.

Amount

Boring/drilling bore well of 150 mm dia for casing/ strainer pipe, by suitable method prescribed in IS: 2800 (part I), including collecting samples from different strata, preparing and submitting strata chart/ bore log, including hire & running charges of all equipments, tools, plants & machineries required for the job, all complete as per direction of Engineer-in-charge. 150 mm Dia

a) Upto 60 m depth

b) More than 60m - 90 m depth

c) More than 90m - 120 m depth

d) More than 120m - 150 m depth

e) More than 150m - 180 m depth

f) More than 180m - 210 m depth

g) More than 210m - 240 m depth

h) More than 240m - 270 m depth

Supplying, assembling, lowering and fixing in vertical position in bore well, PVC casing pipe (of 6 KG) including required hire and labour charges, fittings & accessories etc. all complete, for all depths, as per direction of Engineer -in-charge. a) 175 mm Dia (OD) Pipe

Development of tube well in accordance with IS : 2800 (part I) and IS: 11189, to establish maximum rate of usable water yield without sand content (beyond permissible limit), with required capacity air compressor, running the compressor for required time till well is fully developed, measuring yield of well by “V” notch method or any other approved method, measuring static level & draw down etc. by step draw down method, collecting water samples & getting tested in approved laboratory, i/c disinfection of tubewell, all complete, including hire & labour charges of air compressor, tools & accessories etc., all as per requirement and direction of Engineer-in-charge

Providing and fixing G.I. pipes complete with G.I. fittings including trenching and refilling etc. 65 mm Dia

Providing and fixing suitable size threaded mild steel cap or spot welded plate to the top of bore well housing/ casing pipe, removable as per requirement, all complete for borewell of a)150 mm Dia

Providing and filling sand of grading zone V or coarser grade, allround the G.I. pipes in external work : a)65 mm Diameter pipe

Providing and fixing G.I. Union in G.I. pipe including cutting and threading the pipe and making long screws etc. complete (New work)

Providing and fixing gun metal gate valve with C.I. wheel of approved quality (screwed end) : a) 65 mm nominal bore

Providing and filling sand of grading zone V or coarser grade, allround the G.I. pipes in external work : a)65 mm Diameter pipe

Ground Water investigation by Geophysical equipments for assessment of availability, approximate quality and depth of water bearing zone in the ground by electrical resistivity method, complete and submitting the report as per standard pratice and instruction of EIC Note: 1) The work shall be carried out by specified agency through qualified personnel. 2) The investigation to be carried out for depth of 300mtr. 3) The investigation carried out should mention all stratum details and availability of potable water

THUNGA BROTHERS

M Mohamed Hussain