PROVISION OF BOREWELL NEAR P 41 AT NHO DEHARDUN

Amount

Boring/ Drilling 'pilot bore' of suitable dia for lowering 250mm bore ERW pipe , by suitable method (by DTH-cum-rotary or reverse rig method or hammer method or telescopic method) to any depth (not exceeding 190m) below groung level in any type of strata/ soil/ rock with sand including disposal of materials obtained (soil, rock etc.) from boring to a distance not exceeding 50m with and including deploying required rig, machinary, T&P, equipments etc with and including collection of logical samples (drilling/cutting) and to maintain drill time logbook complete all as specified and directed. Note :- 1. Neccessary fuel, lubricant and chemicals extra required for construction work shall be arrange by contractor and cost of these items shall be deemed to be included in quoted rates. 2. Depending upon availability of water bearing strata, drilling beyond 190m below ground level be carried out with prior written approval of GE.

Development of pilot / trial bore by reaming vertical bore upto 525mm in steps by heavy duty direct rotary rig machine at approved site location in any type of stata for 250mm bore ERW casing pipe for following depth as mentioned below including all connected works complete all as specified and directed :-

Upto a depth of 60m from ground level.

From depth exceeding 60m upto 190m or entire depth as required at site and as directed by Engineer-inCharge. Note :- The cost of hiring and transportation of suitable truck mounted rig machine and other required equipments deemed included in quoted.

Supply, assembling including jointing, lowering and fixing in position ERW plain steel (seamless) casing/ housing pipe of heavy duty class 'C' confirming to IS-4270 (2001) plain end pipe jointed and welded with coupler ring (welding shall be done through out circumference of the pipe and coupler ring both side) complete all as specified and directed by Engineer-in-Charge of following size :-

Nominal bore of pipe 250mm having wall thickness not less than 7.1mm and outer dia 273.1mm.

Nominal bore of pipe 200mm having wall thickness not less than 5.4mm and outer dia 219.1mm. Note :- Standard length of pipe shall be used (length of pipe should not be less than 3m or as approved by GE).

S&F strainer (slotted) pipe of 200mm bore, V-wired, confirming to IS-4270 (2001) fabricated with pipe slote of size 1.55mm x 7.5mm as per IS provision uniformly distributed on the surface complete all as specified and directed.

S&F MS reducer socket of 250 x 200mm nominal bore of suitable length includind welding mild strip of size 40X 6mm (02 Nos for each joint) extended in 75mm on each side complete all as specified and directed.

S&F MS well Cap having minimum thickness 8mm with internal thread & locking arrangement suitable for housing pipe of 250mm nominal bore, complete all as specified and directed.

S&F MS holding clamps made out of 150x15 mm MS flat iron & length upto 1.25m, bent to shape as directed with and including 4 nos, 16mm dia bolts, nut, washers etc of suitable length for holding 250 mm nominal bore housing/ casing pipe complete all as specified and directed.

S&F centering guide made out of 50x6mm mild steel flat iron made to shape as required complete all as specified and directed.

M&L for packing with pea gravels of size 3 to 5 mm natural shape brought direct from river bank packing around casing pipe to entire depth upto ground level complete all as specified and directed.

Developing the tube/ bore well firstly by means of pumping unit using air compressor unit of adequate capacity not less than 250 PSI and then by over pumping untill sand free water is obtained & testing the yield for duration as under :-

With air compressor (first 24 hours).

With air compressor (24 hours to 72 hours).

Over pumping with the help of suitable size of pump and accessories and standby DG set in order to ensure continuous pumping for 24 hours and yield test by 'V' notch method/ orfice method. Note :- The cost of provision/ hiring and transportation of of all T&P required for testing and other equipments required are deemed to be included in quoted rate.

Supply sample box of 'strara sample' made out of 25mm thick teak wood planks of size 900 mm x 400 mm and 150 mm wide and size of sample bits 100 mm x 100 mm and front provided with 3mm thick glazed hinged shutterd 900 mm x 400 mm with hasp & staples to the entire satisfaction of Engineer-in-charge duly filled with strata sample as found while drilling of tube well complete all specified and directed.

M&L for biological and potability testing of water sample carried out from NABL approved lab water testing to be done for organoleptic & physical parameter for general parameters concerning substance undesireable in excessive amount for parameters concerning toxic substance for pesticide residual limit and biological test of water smple as per IS-10500 (2012) complete all as specified and directed.

Supply, installation, commissioning & testing of submersible pump set suitable for 250/ 200mm nominal size of bore well (casing pipe size 250/ 200mm bore), water lubricated and cooled complete with stream line non return valve directly coupled pump set with and including required squirrel cage induction motor not less than 20HP suitable for operation on 415 (+) 7.5% voltage, 3 phase 50 hertz alternating current. The pump set shall be capable to deliver 200 to 300 LPM (ltr per minute) of water at a head of 200 mtr. The electric motor shall be water lubricated, vertical type and shall be directly coupled to the pump. Electric motor and pump shall be of same make complete all as specified and directed. Make :- KSB pumps/ KIRLOSKAR/ KISHORE

Supply, fixing, jointing and testing of submersible flat cable, stranded copper conductor with PVC insulated and PVC seathed, 1100 Volts, 3 core 25 sqmm nominal area, ISI marked. The cable shall be fixed and lowered with column pipe using suitable tie rope of plastic/ nylon as per standard practice complete all as specified and directed.

Material & labour for earthing complete with galvanised steel earth plate electrode 600x600x6mm thick burried directly in ground. ( earth pit not less than 2.25 mtr depth below ground level at any type of strata ) with top edge of the earth plate not less than 1.5mtr below normal ground level surrounded with adequate quantity of charcoal dust mixed with salt to a packed thickness of 15cm all around the plate. connected by 32x6 mm GI strip as earth lead by means of brass nuts and bolt,thimbles check nuts, washers including concrete chamber of PCC 1:3:6 type C-1 using 20mm graded stone aggregate with fair finish, internal surface of concrete chamber shall be given internal dia 300mm x300mm, 15mm thick plaster in CM 1:4 funnel with wire mesh, RCC pit cover of 320x320x80mm size (1:2:4) Type B1 using 20mm graded stone aggregate rainforced with XPM all as shown in electrical plate No 3 of MES SSR Part-1(2009) and specified including and provision of GI strip upto 7.5 mtrs long with 40 mm dia light grade GI pipe protection and watering pipe of GI 20 mm bore, medium grade, including all exavation and earth work and connecting the earthing strip to panel, including testing on completion complete all as specified and directed by Engr-in-charge. Note:- (i) RCC pit cover shall be precast of RCC(1:2:4) type B1, 80mm thick rainforced with XPM weighing not less than 4kg/sqm in lieu of CI cover. (ii) Cost of additional GI strip more than 7.5 mtrs will be measured and paid seperately under relevant items.

Supply, jointing and lowering of column pipe, 80mm nominal bore, galvanized (Hot Dip) MS ERW, heavy pipe having wall thickness 4.80mm and 10mm thick flange duly welded to column pipe both end confirming to IS-1239-1 (2004) with rubber gasket, nut-bolts, spring washers etc complete all as specified and directed. Note :- Standard length of pipe shall be used (length of pipe should not be less than 3m or as approved by GE).

Supply, fixing and connecting water pressure guage 100mm dia, burden type with siphon tube connection, stainless steel needle, valve and welding of suitable size of socket in the delivery pipe for mounting of the pressure gauge complete all as specified and directed.

S&F of MS clamp for holding of column pipe of 80mm nominal bore, made out of MS flat iron 120x12mm, 0.8m long with suitable number and size of nuts, bolts and washers to sustain the column pipe in position complete all specified and directed.

Supply, fixing/ connecting and testing of 80mm dia Non return valve/ reflux valve (ISI marked) of cast iron, double flanged, with by pass arrangement, class B high pressure PN-1.6 including bolts, nuts, washer and jointing materials etc complete all specified and directed.

Supply, fixing/ connecting and testing of 80mm dia sluice valve, cast iron, heavy duty, double flanged PN-1.6 confirmimg to IS-14846 (2000) (ISI marked) with stainless steel spindle and two nos of MS flange of 12mm thick, 4 holes with and including nuts and bolts packing materials etc complete all specified and directed.

S&F discharge head of cast iron with air release valve, suitable to connect column pipe with rising main or submersible pump set with nuts, bolts washer with and including PCC plateform of suitable size and grade complete all specified and directed.

M&L for valve chamber of size 900mm x 900mm x 900mm (internal dimension) with brick masonty valve chamber, 100mm thich PCC (1:4:8) type D2 as in foundation, 200mm thick brick wall built in CM (1:6), 50mm thich coping of PCC (1:3:6) type C1, 15mm thick plastering in CM (1:4) to all internal and exposed surface including necessary excavation and earth work in any type of soil, MS sheet cover 6mm thickness along with angle iron frame of size 40 x 40 x 5mm with locking arrangement with necessary fixing materials like hinges, nut bolts etc (valve chamber cover shall be opened in two valves) and painting to MS cover with two coats of synthetic enamel paint over one coat of red oxide primer etc complete all as specified and directed.

M&L for design, supply, fabrication, installation, testing and commissoning factory made LT Panel board, outdoor type totally enclosed, dust and vermin proof, suitably ventilated, Wall/ floor mounted, 415 volts, 3 phase and neutral, 50 Hz AC supply system, fully compartmentalized, both side openable, made out of 3.00 mm thick CRCA sheet, protection of enclousure IP-54 as per IS: 2147 of 1962 with pre-treatment and powder coated of approved colour including suitable frame work/support made out of suitable size angle iron/flat iron, front opening type with provision for cable entry, with proper ferrule and cable glands, internal wiring with PVC insulated multi stranded copper conductor FRLS cable of adequate size(minimum 1.5 sqmm), including required civil works/anchoring bolts for fixing, PCC foundation etc with and including following all as specified and directed : - (a) Busbar chamber : Electrically grade shrouded aluminium bus bar of capacity 200 Amps for each phase and 100 Amps for neutral and current density 0.8A/Sqmm , including interconnection of all switch gears, fixed on DMC insulators and provision of extension.

Supplying, laying, commisioning and testing of 1.1 KV grade XLPE insulated PVC sheathed steel armoured aluminum stranded conductor LT UG cable ( Conforming to IS 7098), ISI marked, laid in trenches / ducts / through GI pipes under roads of size 50 sqmm 3.5 core complete all as specifed and directed. Note:- The earth work, sand, brick protection cover and GI pipe shall be measured and paid sepretely under appropriate item of Sch A/ BOQ.

Excavation in trenches for laying under ground cables in any type of soil not exceeding 1.5m wide and not exceeding 1.5 M deep and getting out complete all specified and directed.

Returning filling in, including spreading leveling watering and well ramming in layers not exceeding 25cms thick.complete all specified and directed.

Removing surplus excavated soil to a distance not exceeding 50m and depositing where directed at a level not exceeding 1.5 M above the starting point complete all specified and directed.

M&L for sand cushioning to under ground cable provided with a layer of 8cm deep before laying the cable and 15cm deep after laying and stretching the cable including hand punning and consolidating complete all specified and directed. Note: for payment purpose, punned thickness shall be measured.

Supplying and laying sub class `B’ bricks modular size with axis of the bricks perpendicular to the axis of the cable as in cable protection cover complete all as specified and directe.

shyam engineers