Demolition Of Existing Indoor And Outdoor Power Cable Trenches, Construction Of New Power Cable Trench, Extension Of Existing Trench In Control Room, Alteration Of Control Room Wall And Yard Metalling Of The 11 Kv Yard. Replacing 11Kv Odc With 7 Panel 11Kv Indoor Cubicle And Providing 1No Additional 11Kv Feeder Outlet At 110Kv Substation Chengalam - Civil Works