GE/ALP (8525) KOLKATA OF 2025-26

Amount

Demolition of cement concrete (reinforcement) Roofs, floors (other than ground floors), beams, staircases, landing, chajjas and similar suspended work complete all as specified and directed.

Demolition of brickwork or stone/ boulder masonary, build in cement mortar including all quions, arches, pillars etc, but excluding ashlars facings, dressed stonework and precast concrete articles complete all as specified and directed.

Taking down chowkats or frames with shutters (W/O taking off shutters) n. exc 1.5 Sqm each and each removing to or from store complete all as specified and directed.

Taking down chowkats or frames with shutters (W/O taking off shutters) exc 1.5 Sqm but n. exc 4Sqm each and each removing to or from store complete all as specified and directed.

Taking down eaves gutters and rain water pipes, cast iron pipes ( any size or pattern), including all fittings, heads, shoes, bends, swan-necks, reinforced concrete drain pipes etc. including cleaning or refixing or removal to store ( measured overall length as fixed along the centre line over fittings and accessories) complete all as specified and directed.

Taking up or down steel tubing 15 mm and connections, including cleaning for re-fixing or removal to store complete all as specified and directed.

Taking up or down steel tubing 20 mm and connections, including cleaning for re-fixing or removal to store complete all as specified and directed.

Dismantling wrought iron or mild steel work of any descripiton not otherwise provided complete all as specified and directed.

Dismantling Plain or corrugated steel sheeting, any gauge, thickness, including Nainital or similar pattern roof coverings sheet in roof coverings complete all as specified and directed.

Dismantling PVC water tanks Cap exc 250 Ltr but n. exc 500 Ltr and removing to store etc complete all as specified and directed.

Dismantling PVC water tanks Cap exc 500 Ltr but n. exc 1000 Ltr and removing to store etc complete all as specified and directed.

Taking down carefully copper / Aluminium point wiring including (light, fan, socket or power complete fittings, such as switches, ceiling roses, pendant holders, Batten holders, shades conical fan regulators, light fitting, power sockets etc) removing materials from site all complete all as specified and directed.

Taking down carefully UNSV main switch and DB's including MCBs of of any size make, type and capacity and depositing at site complete all as specified and directed.

Dismantling and taking out earthing of any size and taking out from site complete all as specified and directed.

Dismantling and taking out submain wiring 2/3/4/6 wire of any size and taking out from site complete all as specified and directed.

M & L Boring /drilling & reaming Borewell of 550mm dia. in all types of soil including rocky strata, boulders etc. for casing pipe, by suitable method prescribed, including collecting samples from different strata, repairing and submitting strata chart/bore log, including hire & running charges of all equipments, tools, plants & machineries required for the job up to 350 Meter below ground level complete all as specified and directed. NOTE:- (a) The bore/tube well should be constructed by the agency as approved by GE(A) Kolkata (b) The Rates also inludes transportation of Rig Machine & T&P at Site. (c) Trail Bore will be drilled, if sufficient wet strata is available then ERW casing will be lowered. In case strata is not available payment only for drilling will be made. (d) Drill Cutting Samples need to be properly washed and to be collected at every One Meter Interval and kept systematically.

M & L for development of Tubewell in accordance with compressed air after 25% extra capacity pump by pumping muddy water, Water Test for Chemical & Bacteriological Test complete all as specified and directed. Note:- (a) Testing and developing the bore well by means of air compressor 5000 PSI till sand free clear water discharge is obtained to achieve maximum yield of suitable capacity for first 20 hours running complete all as specified (All equipments shall be arranged by contractor at his own cost). b) If desirable result is not obtained, thus it is to be run for more no of hours. c) Testing portability of water by chemical analysis such as PH Value, dissolved solids, hardness as CaCo3 and Calcium, Magnesium, Chlorides, sulphate, nitrate, alkality, Iron Turbidity NTU, mineral oil, colour hazen units, taste, odour, residual free chlorine, total Coliform per 100mm (microbiological test) and E Coli as per 100ml (microbiological test) as well as bacteriological portability from any Govt lab accredited/NABL certified lab and as per IS 2800-19-1991 complete all as spd and directed.

M & L for Yield Test for Borewell by continuously pumping for 24 hours to determine safe Pumping Yield complete all as specified and directed.

M & L for Gravel packing Tubewell construction in accordance with including providing gravel fine/medium/coarse, in required grading size as per actual requirement. Note: after gravel shrouding up to the sand layer is to be tapped, cement ceiling is recommended for 2-8 mm thickness against the impermeable clay zone just above the tapped sand zone complete all as specified and directed. Note:-a) Pea gravel of size 1.5mm to 4.5mm packed all around 300mm bore housing pipe and 200mm bore blind pipe, strainer pipe upto entire depth as required at site in new bore-well . b) For the purpose of measurment,gravel brought by the contractor shall be stacked properly at site & measurments of stack shall be carried out before use and after use(left unused) to arrive at the net qty of gravel used by the contractor in the work & payment against this item shall only be made for the qty of gravel used in the work not for the total qty of gravel brought.

Supplying, assembling ,lowering and fixing in vertical position in bore well, PVC-U Schedule 80 pipe of 300mm nominal dia confirming to ASTM-D-1785/IS: 12818 including all necessary fittings complete all as specified and directed.

Supplying, assembling ,lowering and fixing in vertical position in bore well, PVC-U Schedule 80 pipe of 200mm nominal dia confirming to ASTM-D-1785/IS: 12818 including all connected fittings etc. complete all as specified and directed.

Supplying, assembling ,lowering and fixing in vertical position in bore well, Fiber Glass Fillter 200mm nominal size dia 7mm wall thickness (min) confirming to ASTM-D-1785/IS: 12818 including all connected fittings & accessories etc complete all as specified and directed.

M & L for all reducers, bail plug ,well cap,MS strip for centering , MS iron clamps , all sorts pieces,electrlogging and sample strata box etc. complete all as specified and directed. Note:- (a) Reducing socket for connecting 300mm bore housing pipe with 150mm bore. b) Mild steel bail plug suitable for 150mm bore pipe 1.5 metre long having wall thickness of 6.4 mm with strong iron hooks. c) Well cap fabricated out of 6 mm thick mild steel sheet for 300mm bore housing pipe threaded similar to housing pipe with handle made and of 20mm dia mild steel round bar. d) Mild steel flat iron 75mmx6mm as center guides (set of three), standard pattern for 300/150 mm bore housing pipe. e) MS clamps made out of flat iron 125mmx12mm and 01 metre long with nut, bolts of 22mm dia of suitable length for 300mm bore housing pipe. f) Mild steel structural steel E-250 grade 410W (ISMB-150) fixed independently without connecting plate including two coats of black paint over a coat of red oxide g)10mm thick structural steel should be Fe 290 (Grade E165) mild steel black plate of size 600mm dia & cut into two semicircular equal parts with 300 mm dia hole in the center. (h) Stell wire rope 8mm galvanised IWRC as per IS-2262/02alongwith suitable size clamps & U bolts for holding the submersible pumps and motor of capacity upto 35HP complete-40RM each borewell.

Supply and installation, tesing, commissioning of vertical type submersible pump-Motor of 12.5HP suitable to deliver capacity 1250LPM at 19-90 Mtr head with IP protectuin IP-68 for borewell complete all as specified and directed with the following specification :- Pump Type of Pump : Submersible Discharge capacity : 45M3/Hour Head : 19-90 mtr No of stage : 05 Outlet dia : 80mm Rated speed : 2900 RPM Pump Casing : CI, Impeller : Stainless Steel/Noryl, Shaft : Stainless Steel Shaft Sleeve : Stainless Steel Motor Motor HP/KW : 12.5/9.3 SYNC Speed : 2900 RPM Rated Voltage : 415V Type of motor : Submersible Wet Winding Type of Cooling : Water Cooled Method of starting : S/D Make : KIRLOSKAR model No KS8D-1305 or eqvt of Make KSB/PLUGA

Supplying, assembling, lowering and fixing in vertical position in bore well heavy grade MS column pipe of 100mm dia with flanged ends including provisioning of MS flanged heavy duty flanged joining with joining materials by bolt, nuts , washers & rubber gasket incl fittings & accessories complete all as specified and directed.

Supplying and laying PVC insulated industrial submersible copper cable of 6 Sqmm 3 Core including suitable size of lugs complete all as specified and directed. Make : Polycab/Finolex/KEI/Havells

Supply and laying galvanised iron pipes of medium grade with ISI Marked with all tube fittings ( such as bends, elbows, tees, short pieces of medium grade , connectors, back-nuts, caps, plugs and unions etc.) laying in trenches/ floors/ ducts and also cutting pipes, screwing, and for making forged bends on piping as required for the 80mm bore of pipes complete all as specified and directed

M&L for plugging of old abondonned bore well by putting on 6mm thick MS plate on the casing pipe and fixed it with M.S casing pipe by run welding after cutting the plate in round shape to cover up the casing pipe entirely for safety purpose complete all as specified and directed.

Hindustan Traders (BID ID -3470323)

SUDHA ENTERPRISES (BID ID -3469889)

PUTUL CONSTRUCTION CO. (BID ID -3469902)

ELECTRO FREEZE (BID ID -3469467)

M. M. C. AND CO (BID ID -3469048)

NICE INFOTECH (BID ID -3468450)