Rail Vikas Nigam Ltd (RVNL) emerged because the Lowest Bidder (L1) for “Construction of four Nos. Tunnels (general Length 1.6km) with ballast less track, Earthwork in formation, Construction of Important Bridges, Major Bridges, Minor Bridges, Supply of Stone ballast, Track linking, facet drain retaining wall and so forth. From Km 831.8 to Km 841.Nine in Dharakoh Maramjhiri section in connection with 0.33 line.”