Construction of Intermediate Adit (7.5m Dia.) to Diversion Tunnel of 11.5m dia. With Horseshoe shape in 1200 MW Teesta Stage III HEP under SEW Infrastructure Ltd, using Heading & Benching + Kerb Concreting + Overt concrete /Gantry. Construction of two testing tunnels (150m & 330m long) at dam site (2.25 m dia.) as Site In charge in 300MW Panan H.E.P. Machinery, Material & Manpower Planning with Execution for the Bunker Tunnels of size 6m x 5.5m dia of various lengths for Defence in North Sikkim @ 15050 FT elevation.