installation of rig well near bishu mahato house .subhasini tg, sansad 24, part no. 11 / 118 , 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 charge and labour for rig machine, tools and plants ataging force pumping set and making arrangement for water required for boring etc complete and loering of pipes strainers, blind pipe etc, complete. ( b ) depth upto 250 metre for 150 mm dia, tube well inlargement of 200 mm dia ( upto 50m ) ( i ) first 50 metre = , ( ii ) next 50 m = , supplu g.i pipe strainer with brass net & jacketted of approved quality ( heavy type ) ( iii ) 80 mm dia 3x3.00 = , supplying, fitting and fixing 65 mm dia. deep well brass cylinder with necessary fittings and accessories. , supplying, fitting and fixing heavy type tube well mouth reducing sockets. ( ii ) 75 mm x 150 mm , supplying, fitting & fixing 15 mm dia. galv. m.s. connecting rod with sockets. , supplying, fitting & fixing g.i cap at top ( ii ) 100 mm , washing and development tube well with air comnpressor pump and engine for 8 eight hours continous pumping per day eith necessary arragement for testing the yield in gallons per hour with v notch including hire and labour charges for all tools and plants and scaffolding as required. , packing the annular space between the out side of the tube well pipes and 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 -in- charge including cost of all materials labour and equipment complete. , ( a ) supply of e.r.w.m.s. ( electrical resistant welded m.s ) black pipe of tata make ( heavy quality ) as per standard specification, 5 mm thick. ( ii ) 150 mm dia = , ( iii ) 50 mm dia= , mark - ii hand pump , providing platform including c.c. drain , display board , gst @ 18% of gross amount , labour welfare cess @ 1% of gross amount