AUGMENTATION OF WATER SUPPLY SCHEME AND ALLIED INFRASTRUCTURE AT RIDGE AREA AT JAMMU UNDER GE SATWARI

Amount

Drilling of pilot BORE hole 300mm (12 inch) dia from ground level to 310 metre in any strata by DIRECT ROTARY method as per IS : 2800 : 1979 (revised and amended) below ground level through any kind of strata soils/rocks, disposal of surplus soil within a distance of 100m, well ramming and stablizing of material, transportation of drilling Rig and other T&P required, keeping space for pea gravel packing in and including lowering and extraction of casing pipes of suitable thickness after lowering of designed assemble of EWR pipe complete all as specified and as directed. Notes :- 1. Casing pipe shall be arranged by the contractor and the same shall remain property of the contractor after extraction. 2. In case of non-extraction of casing pipe due to failure of bore well, the contractor will have no claim what-so-ever on this account. 3. ERW housing pipe shall be measured and paid separately under respective item of this Schedule.

Enlargement of bore hole from 300mm to 600mm dia bore to acccomodate assembly pipe size of 300 and 200mm dia to the required depth after going through the cutting / strata encountered while drilling of borehole :-

From Ground Level to 100 metre depth below ground level

From 100 metre below ground level to 200 metre depth below ground level

From 200 metre below ground level to 310 metre depth below ground level

Supplying, assembling including lowering and fixing liner assembly or strainer etc in position (net effective length shall only be measured and paid) all as specified below :-

Mild steel ERW screwed and socketed housing pipes 300mm (12 inch) nominal bore having minimum 8 mm wall thickness confirming to IS:4270-2001 and all around welded with 04 Nos stiffeners of flat iron 40x6mm, 300 mm long, complete all as specified and as directed.

Mild steel ERW screwed and socketed housing pipes 200mm (08 inch) nominal bore having minimum 6.4 mm wall thickness confirming to IS:4270-2001 and all around welded with 04 Nos stiffeners of flat iron 40x6mm, 300 mm long, complete all as specified and as directed.

Mild steel ERW screwed and socketed slotted housing pipes 200mm (08 inch) nominal bore having minimum 6.4 mm wall thickness confirming to IS:4270-2001 having slot size of 1.6mmx75mm and all around welded with 04 Nos stifferers of flat iron 40x6mm, 300 mm long, complete all as specified and as directed.

Supply, assembling including lowering and fixing Sleeve joint 300x200mm (12 inches x 8inches), complete all as specified and as directed.

Housing pipe clamps made of MS flat of size 100mmx12mm and 750mm long for 300mm (12 inch) bore pipe with suitable bolts, nuts and washers all as specified and as directed.

Supply and filling Pea gravel of Size 2mm to 6mm around the liner assembly from bottom to ground level including continuous watering during development all as directed by Engr-in-Charge.

Supply and Fixixng Mild Steel Well Cap for (12 inch) 300mm bore made out of mild steel ERW 8mm thick threaded casing pipe complete, all as specified and as directed.

Development of tube well by means of pumping by Air compressor of minimum pressure 10 Kg/Square centimetre (compressor to be arranged by contractor at his own cost), until sand free and clear water upto 5 PPM is obtained at optimum yield complete all as specified and directed :-

First 24 hours of development (collectively)

Subsequent development beyond 24 hours ( if required )

Note :- The cost of the yield test by V Notch method and testing of water sample (chemical and biological) from Government approved Laboratory / Regional Research Laboratory to confirm the potability of water as per IS-10500-2012shall deemed to be included in the rates of Serial Item No '8 to 8.02' above and nothing extra from the Department shall be admissible on this account.

Supplying strata sample box made of Ist class soft wood (Deodar) with glazed shutter and pigeon holes for depth sample at the interval of every 3 metre and supplying of strata chart duly marked on 3 mm thick laminated sheet of size 4 inch X 3 inch giving complete details of display of installation, complete all as specified and as directed.

Supply and Fixing MS 8 inches (20 cms) dia and 8 mm thick bail plug with strong iron hook by means of welding all as specified and as directed

Flat iron of size 50x6mm as centre guides of required size including welding to casing pipe all as specified

Construction of foundation of tube well of size 1.0m x 1.0m having 45mm thick PCC 1:2:4 type B-1 (Using 20mm graded crushed stone aggregate) laid over 75mm thick PCC 1:3:6 type C-2 with GI pipe 80mm bore medium grade - 02 Nos embedded through out the block of suitable length with GI plug and socket fixed on end, complete all as specified and as directed.

Eight Arms

Continental Enterprises