Providing 300 mm/ 150 mm/ 110 mm dia new deep Tubewell in BSNL CTO / TE Compound, Panbazar, Guwahati.

Providing and fixing G.I. pipes complete with G.I. fittings including trenching and refilling etc. : External work

40 mm dia. nominal bore

50 mm dia. nominal bore

Making connection of G.I. distribution branch with G.I. main of following sizes by providing and fixing tee, including cutting and threading the pipe etc. complete :

25 to 40 mm nominal bore

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

40 mm nominal bore

50 mm nominal bore

Providing and fixing gun metal non- return valve of approved quality (screwed end) :

50 mm nominal bore i) Vertical

Vertical

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

40 mm nominal bore

50 mm nominal bore

Boring/drilling bore well of required 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, upto 90 metre depth below ground level.

All types of soil

300 mm dia

Boring/drilling bore well of required 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, beyond 90 metre & upto 300 metre depth below ground level.

Rocky strata including Boulders

150 mm dia

110 mm dia

Supplying, assembling, lowering and fixing in vertical position in bore well, unplasticized PVC medium well casing (CM) pipe of required dia, conforming to IS: 12818, (of Brands like Supreme / Finolex /Prince / Oriplast or equivalent )including required hire and labour charges, fittings& accessories etc. all complete, for all depths, as per direction of Engineer-in-charge.

110 mm nominal size dia

150 mm nominal size dia

200 mm nominal size dia

300 mm nominal size dia

Supplying, assembling, lowering and fixing in vertical position in bore well unplasticized PVC medium well screen (RMS) pipes with ribs, conforming to IS: 12818, (of Brands like Supreme / Finolex /Prince / Oriplast or equivalent )including hire & labour charges, fittings & accessories etc. all complete, for all depths, as per direction of Engineer-in-charge.

110 mm nominal size dia

150 mm nominal size dia

200 mm nominal size dia

Gravel packing in tubewell construction in accordance with IS: 4097, including providing gravel fine/ medium/ coarse, in required grading & sizes as per actual requirement, all complete as per direction of Engineer- in-charge.

Supplying, assembling, lowering and fixing in vertical position in bore well, ERW (Electric Resistance Welded)“C”Class (Heavy) GI Pipe screwed and socketed/ plain ended casing pipes of required dia, conforming to IS: 4270, of reputed & approved make, including painted with outside surface with two coats of anticorrosive paint of approved brand and manufacture, including required hire & labour charges, fittings & accessories, all complete, for all depths, as per direction of Engineer-in-charge.

150 mm nominal size dia having minimum wall thickness 5.00 mm

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 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 bore well of:

200 mm dia

Providing and fixing M.S. clamp of required dia to the top of casing/ housing pipe of tubewell as per IS: 2800 (part I), including necessary bolts & nuts of required size complete.

200 mm clamp

Providing and fixing Bail plug/ Bottom plug of required dia to the bottom of pipe assembly of tubewell as per IS:2800 (part I).

100 mm dia

150 mm dia

Physical, Chemical & bacteriological testing of water including carrying water sample to the laboratory and submission of test report. The test to be got done from a govt laboratory or reputed testing lab as approved by the Engineer-in-charge.

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