PROVN OF BOREWELL AND INTERLINKING OF EXISTING BOREWELL AT JORHAT MIL STN

Drilling pilot bore hole of 300 mm dia by Rotary Drilling Method (Direct Circulation Method) as described in IS 2800: 2019 in any kind of soil strata including hard stone/boulder beyond 60 metre depth upto 120 metre depth below ground level, including compound/ powder like valmite, bentonite solution, local silty clay etc. to be required as per the site condition including collecting samples from different strata, preparing and submitting strata chart/ bore log all complete all as specified and directed.

Reaming 350 mm dia pilot bore to 550 mm dia bore upto 60 metre depth below ground level complete all as specified and as directed.

Reaming 350 mm dia pilot bore to 550 mm dia bore from 60 metre upto 120 metre depth below ground level complete all as specified and as directed.

Supplying, assembling, jointing and lowering PVC casing pipe (CM) for water wells, plain ended, 250 mm nominal bore of pipe with12.5 mm wall thickness, UNPLASTICIZED type, PVC pipe conforming to IS 12818: 2010 and fixing in position in different depth with male and female threads allowed to be fitted with other pipes in well, complete all as specified and as directed.

Supplying, assembling, jointing and lowering PVC casing pipe (CM) for water wells, plain ended, 150 mm nominal bore of pipe with 7.5 mm wall thickness, UNPLASTICIZED type, PVC pipe conforming to IS 12818: 2010 and fixing in position in different depth with male and female threads allowed to be fitted with other pipes in well, complete all as specified and as directed.

Supply and laying column pipe 80 mm bore both end flanged made out of GI tubing medium grade welded at end of column pipe cutting of groove to house submersible cable 3 core, length of each column pipe not exceeding 3.10 metres complete all as specified and as directed.

Supply and fixing clamps for Column pipe made out of flat iron of hot rolled medium and high tensile strutural steel of grade E 250 quality C conforming to IS 2062: 2011 and as per IS 2800:2019 including nut and bolts of required size etc. complete all as directed.

Supply and fixing galvanised steel wire rope multistrand of size 6 mm dia as per ISO 4309 : 2019 and safe for carry a point load of 48.6 KN/5 Ton, for lowering of pump/column pipe, complete all as specified and directed by Engr in charge.

Supply and laying or fixing or passing through pipe PVC insulated cable for working voltages of 1100 V, PVC sheathed, armoured, 3 core, nominal cross sectional area of main conductor 6 sqmm, solid aluminium conductor, ISI marked as per IS 1554(Part-I): 1988 including cable glands, lugs etc. to suit the cable size in service connections complete all as specified and as directed.

Supplying & laying in trenches 80 mm nominal bore, medium grade, galvanised steel tube conforming to IS 1239 (Part-1): 2004 including all fittings conforming to IS 1239 (Part-2): 2011 complete all as specified and as directed.

Supply, laying, jointing, testing and commissioning cross-linked polyethylene (XLPE) insulated cable for working voltages of 1100 V, PVC sheathed, armoured, 4 core, nominal cross sectional area of main conductor 25 sqmm, stranded aluminium conductor, ISI marked as per IS 7098(Part-I): 1988 including cable glands, lugs etc. to suit the cable size and to be laid in trenches, fixed along pole, under floors, passing through GI pipe /roads crossing, through concealed GI pipe along wall etc. complete all as specified and as directed.

M & L for plain cement concrete in foundation, filling and mass concrete in M15 (Nominal Mix) using 40 mm nominal size graded crushed stone aggregate complete all as specified and as directed.

Excavating in trenches not exceeding 1.5 m wide and not exceeding 1.5 m in depth or not exceeding 10 sqm on plan and not exceeding 1.5 m in depth for foundation, etc. or for shafts, wells, cesspits, manholes, pier holes, etc. or for cable laying or water supply pipes lines etc and getting out in soft/ loose soil complete all as specified and as directed.

Returning, filling in, including spreading, levelling, watering and well ramming in layers not exceeding 25 cm in soft/ loose/ hard/ dense soil complete all as specified and as directed.

Removing excavated material (soils) not exceeding 50 m and depositing where directed at a level n exc. 1.5 m above the starting point complete all as specified and as directed.

M&L Sand Cushioning (dry river sand) in Trenches for protection of UG Cables (below, above and around the UG Cable laid in Trenches) of 230mm Spread thickness and consolidated (punned) upto 180mm thickness, complete all as specified and as directed. (NOTE : For the purpose of Payment, Punned thickness of Sand Cushioning only shall be Measured and Paid for)

S&F Sub-Class B brick, well burnt, laid breadth-wise along the axis of Cable laid in Trenches over Sand Cushion laid for UG Cable Protection, complete all as specified and as directed.

Supply, laying and jointing of 100mm bore ductile iron pipes with spigot and socket end suitable for push on rubber joint centrifugally cast, class (K-9), inner side cement lining and outer side black bitumen coating and any length, laid in trenches including push on rubber (EPDM) ring with ISI marked, complete all as specified and directed.

Supply, laying and jointing of 80mm bore ductile iron pipes with spigot and socket end suitable for push on rubber joint centrifugally cast, class (K-9), inner side cement lining and outer side black bitumen coating and any length, laid in trenches including push on rubber (EPDM) ring with ISI marked complete all as specified and directed.

Supply, laying and fixing cast iron fittings for spigot and socketed cast iron pipes for water main upto 150mm bore such as bend (any type, radius and angle) tapers any type, (straight, bend, increasing, decreasing or double socket etc.), Tee pieces single branch, 'Y' junction, double branch, cross (all sockets or socket and spigot) collars, caps and plugs, complete all as specified and directed.

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