Re-drilling against defunct tubewell including conversion of damaged RCC pipe line and renovation of pump house at Sonadanga D.T.W. (BN-284 )

Drilling & Installation Drilling of bore hole 55.88 cm dia through any kind of soil by adopting any method of drilling (by Direct or Reverse Circulation Rotary Rig) upto required depth including digging trenches and pits etc. all complete. (I) Upto 30M below GL

(ii) Beyond 30M upto 60M

(iii) Beyond 60M upto 90M

(iv) Beyond 90M upto 120M

Labour charges for lowering of M.S. E.R.W. pipes, strainers, blank pipe etc. and fitting, fixing and jointing of tubewell assembly at sites by welding etc. as per direction of the Engineer-in-Charge. 200 mm NB Blank pipe,Slotted pipe & Bottom Plug

350 mm NB Housing Pipe

Supplying fitting fixing including fabrication with required materials (IS: 2800 Part-I with latest amendments) as directed by the Engineer-in-Charge and lowering in position etc. (I) (i) 10 mm. thick (350 mm x 200 mm) NB M.S. Reducer of approved quality including socket.

(ii) M.S. Centre guide (consisting of 3 nos., 6 mm thick, 50 mm wide, not less than 600 mm long and 125 mm rise of arch) of approved quality

(iii) MS Top cap of suitable size (8mm thick) and approved quality for covering top of housing pipe of 350mm NB (Top cover will be tack welded with housing pipe at 4 points 90 Degree apart)

(iv)100 mm width x 12 mm thick Sockets / Rings made from MS Flats by rolling process and double butt welding for joining 350 mm NB Housing Pipe.