Construction Of Balance Work Of Single Line Bg Tunnel No. 6 Main Tunnel ( Length-1746 M), Escape Tunnel ( Length-1542 M) And Cut And Cover (Length- 250 M) And Slope Protection Work From Portal P1 Side And Other Ancillary Works Between Ch. 45750.0 M To Ch. 50746.0 M In Pherima-Piphema Section In Connection With Dimapur-Kohima New Bg Line Project.