The state-owned NHIDCL is overseeing the project that has been contracted out to Hyderabad-based firm, Navayuga Engineering Company Ltd (NECL)
Silkyara tunnel excavation to restart after all precautions in place: Official

The state-owned NHIDCL is overseeing the project that has been contracted out to Hyderabad-based firm, Navayuga Engineering Company Ltd (NECL)