Civil work

Labour for boring through any type of soil for sinking tube well of required dia. with top enlargement by rig boring system (either by reserve circulation or by direct rotary method) including hire charges and labour for rig machine, tools and plants, staging, force pumping set and making arrangement for water required for boring etc. complete and lowering of pipes, strainers, blind pipes etc. complete.(a)(a) For depth upto 250 metre for 100 mm dia. Tube well with top enlargement of 200 mm dia.(upto 50 metre). First 50 metre

Next 50 metre

Next 50 metre

(iv) Rest 100 metre

Supplying high density polythene strainer of approved make with adapter conforming to I.S. specifications.100 mm dia

Packing the annular space between the outside of the tube well pipes & strainers and the bore with pea size washed gravel of approved quality having size from 2 mm to 5 mm or the size approved by the Engineer-incharge including cost of all materials labour and equipment complete.Note: Initial 6 m. of Annular space between the housing pipe and the bore should not be shrouded with Pea size gravel to avoid contamination with surface water.

Supplying, fitting and fixing heavy type bell mouth reducing socket. (iii) 100 mm X 150 mm

Supplying, fitting and fixing steel cutter piece upto 450 mm long with sockets. (ii) 50 mm dia

Supplying, fitting and fixing G.I. cap at top (iii) 200 mm

Supplying, fitting and fixing M.S socket ring (i) 100 mm