History

  • 1988 – Tehri Hydro Development Corporation Ltd. (THDC) incorporated as a Joint Venture of Govt. of India and Govt. of UP for implementation of Tehri Hydro Power Complex (2400 MW).
  • 1989- Project works transferred by Govt. of UP to THDC Ltd.
  • 1990- MoEF accorded Environment Clearance to entire Tehri Hydro Power Complex. River Bhagirathi diverted through right bank diversion tunnels. Foundation seat of upstream Coffer Dam Tehri HPP 1000MW raised upto EL 615.0 (15m above river bed level).
  • 1991- Foundation seat of Tehri HPP Main dam raised upto EL.+615 (15m above river bed level)
  • 1994- Govt. of India accorded Investment approval for Tehri HPP. Power House civil works contract for 3 packages awarded.
  • 1995-Coffer Dam construction of Tehri HPP commenced and raised upto 650 m.
  • 1996- Civil construction work of Tehri HPP Power House started. Tehri HPP Spilways stripping work awarded and works commenced.
  • 1997-Award of Contract for Main Dam of Tehri HPP and works commenced. Award of Contract of Tehri HPP Power House, Electro-Mechanical Equipment &Control Systems.
  • 1999- Instructions were issued by Chief Secy. GOUP to Commissioner (Garhwal) for shifting of Govt. Offices/Institution from Old Tehri Town to newly constructed New Tehri Town for Urban resettlement.
  • 2000- Govt. of India accorded Investment approval for 400 MW Koteshwar Hydro Electric Project.
  • 2001- Closure of Diversion Tunnel T-3 & T-4 of Tehri HPP commenced and completed.
  • 2002- Civil Contract for Koteshwar HEP awarded.
  • 2004- Diversion Tunnel T-1 of Tehri HPP plugged.
  • 2005- Tehri dam raised to full height. Gates of diversion tunnel T-2 lowered. Reservoir impoundment started.
  • 2006-Commercial Generation from Unit-III and Unit –IV of Tehri Stage-I started.
  • 2007- Commercial Generation from Unit-I and Unit-II of Tehri Stage-I started.
  • 2008- Investment approval of 444 MW VPHEP accorded by Govt. of India.
  • 2009- THDCIL conferred with “Mini Ratna Category-I” status in Oct-09. Name of the Corporation changed to THDC India Ltd.
  • 2010-Schedule- A status granted to THDC India Ltd.
  • 2011- Two units of Koteshwar HEP Commissioned. THDC Institute of Hydro Power Engineering and Technology, established at Bhagirathi Puram, Tehri Garhwal.
  • 2012- Koteshwar Power Plant (400MW) became fully operational.
  • 2013- Forest land for VPHEP diverted in Dec-13. Tehri HPP reduced the catastrophe of Kedarnath Flood and saved holy towns of Rishikesh and Haridwar.
  • 2014-Civil & HM and EM Works of VPHEP (444 MW) awarded.
  • 2016- Civil Works of Dhukwan SHEP (24 MW) awarded. 50 MW Wind Power Plant commissioned at Patan, Gujarat.
  • 2017- 63MW Wind Power Plant commissioned at Devbhumi Dwarka, Gujarat.
  • 2019- Govt. of India accorded Investment Approval of khurja STPP (2 X 660 MW) in Distt. Bulandshahr (UP) and associated Amelia Coal Mine. Hon’ble Prime Minister laid foundation stone of khurja STPP on 9th March-19. Major Plant packages of Khurja STPP awarded and work commenced
  • 2020- 24MW Dhukwan SHP commissioned and started commercial operation. Strategic sale of 75% equity by Govt. of India in THDCIL to NTPC Limited JV Company between THDCIL and UPNEDA named TUSCO LTD incorporated for development of 2000 MW Ultra Mega Solar Power Parks in state of U.P
  • 2021- Erection of Boiler –I and Boiler-II of Khurja STPP started. 50MW Solar Project at District Kasargod, Kerala Commissioned and dedicated to the Nation by Hon”ble Prime Minister on 19.02.2021.