Manual unloading of coal from wagons received from Mandamarri/ LTC/ SING/ MNGR/ IB valley/ M. C. L. Talcher ( D. B. Siding )/ ( LRST. Siding ) with Poclainer in the UnCrushed stock yards of Stage- I & II/ CHP and Stage- III & IV/ CHP as and when required during the period from the commencement of work to till completion of work