Drilling of 275 mtr (07 nos.) boreholes including supply and lowering of 200 mm dia. (MS ERW Black pipes IS 3589 with TC, 6.5 mm thick) for stabilization of underground workings near Unstable Area Zone-A, Zone-D and Zone-F of Handidhua Colliery.

Amount

Item Description/ Heading

Drilling of 6"(150mm) pilot hole, this item shall be paid applicable in case only when the pilot hole fails to puncture the workings : 1) Un - stable area/Gayatri School- 03 Nos.(3 Nos X 35 m Depth = 105 mtr) 2) Deulbera Village Telisahi Tank(Zone - F) - 2 Nos.(2 NosX 35m = 70 mtr) 3) Back side of Colliery Police Station(Zone - D) - 2 Nos X 50 m = 100 mtr) = Total 275 mtr.

Reaming of 150mm dia borehole to 300mm dia by DTH(Drilling of 12"(300mm) finish dia boreholes)

Providing 8"(200mm) dia MS ERW casing pipes( MS ERW Black Pipes IS : 3589 with TC) 6.5 mm thick for lowering into the hole.

Welding of 8" (200 mm) dia casing pipe to pipe(MS ERW Black Pipes IS:3589 with TC ) for 41 nos. joints.

Lowering of 8" (200 mm) dia casing pipes(MS ERW Black Pipes IS:3589 with TC ).

Sealing of annular space between 300mm/200mm dia hole edge and including all cost of machine, materials and labour charges etc. (∏(D2 - d2)/4X 268 m)) D = 300mm, d= 210 mm (∏( 0.32 - 0.2102 ) /4 X 268m)) = 9.66

Total impact of GST for the purpose of CTC

Pratima Agriculture (BID ID -1148169)