Kopili Hydro Electric Project Explained

Khandong Dam
Name Official:Kopili Hydro Electric Project
Coordinates:25.5286°N 92.6328°W
Location Map:India Assam
Location Map Caption:Location in Assam
Location:Assam, India
Opening:1984
Purpose:P
Owner:Government of India
Dam Type:Concrete Gravity
Dam Crosses:Kopili River
Dam Length:243m (797feet)
Spillway Capacity:15417 m³/s
Res Name:Kopili Reservoir
Res Capacity Total:166800
Res Surface:13.36km2
Plant Name:Khandong Power House
Plant Coordinates:25.5169°N 92.6661°W
Plant Operator:NEEPCO
Plant Commission:8 March 1984
Plant Turbines:3×25 MW
Plant Capacity:75 MW
Plant Annual Gen:363.9 MU
Dam Height:66m (217feet)
Umrong Dam
Name Official:Kopili Hydro Electric Project
Coordinates:25.5285°N 92.7126°W
Opening:1988
Purpose:P
Dam Type:Concrete Gravity
Dam Crosses:Umrang river
Dam Length:143m (469feet)
Dam Height:30m (100feet)
Spillway Type:Ogee Radial
Spillway Capacity:554.7 m³/s
Res Name:Umrong Reservoir
Res Capacity Total:175000
Res Surface:16km2
Plant Name:Kopili Power House
Plant Coordinates:25.586°N 92.723°W
Plant Operator:NEEPCO
Plant Commission:4 July 1988
Plant Turbines:4×50 MW
Plant Capacity:200 MW

Kopili Hydro Electric Project is a, hydroelectric power project on the Kopili river and its tributary, Umrong stream. It is located in Dima Hasao district of Assam state in India.[1] The project is developed and operated by North Eastern Electric Power Corporation Limited. It is an important project since the Indian state of Assam, Arunachal Pradesh, Manipur, Meghalaya, Mizoram, Nagaland and Tripura benefit from this project.

Overview

The Khandong dam impounds Kopili river and Umrong dam impounds Umrong river creating Kopili reservoir and Umrong reservoir. Kopili reservoir partially falls in Meghalaya state as Kopili river forms geographical boundary between Assam and Meghalaya in this region. Water from Kopili reservoir is fed to Khandong power station, releasing water into Umrong reservoir. Water from Umrong reservoir is diverted via tunnels to Kopili power station on the bank of Kopili river. Tail race waters of Kopili power house are released back into the Kopili river. Although this project is not classified as such, its design is very similar to run-of-the-river power projects.

Power plants

Khandong I & II

The Khandong power house stage-I and stage-II are located between two reservoirs, near Umrong reservoir, in geographical location 25.5168°N 92.666°W and Khandong dam is located at 25.5286°N 92.6327°W. Khandong Stage-I powerhouse has 2x25 MW Francis type turbines, generating 50 MW power at peak. It is connected to Kopili reservoir via a diameter, long concrete-lined head race tunnel. First and second units of stage-I were commissioned on 8 March and 3 May 1984 respectively. Khandong stage II powerhouse is located close to stage-I power station. It has 1x25 MW turbine, connected via a long water conductor system, which was provisioned for at the time of stage-I construction. Third turbine was commissioned on 26 July 2004.[2]

Kopili I & II

The Kopili power house stage-I and stage-II are located on the right bank of Kopili river in geographical location 25.586°N 92.723°W. The related Umrong dam, completed in 1988, is located at 25.5284°N 92.7126°W. Khandong Stage-I and II powerhouse is installed with 4x50 MW Francis type turbines, generating 200 MW power at peak. It is connected to Umrong reservoir via a diameter, long concrete-lined head race tunnel. The first unit of stage-I was commissioned on 4 July 1988.

Lower Kopili HEP

Because of contamination of Kopili river waters, the prospect of Lower Kopili Hydro Electric Project downstream of Kopili powerhouse has met with hurdles for environmental clearances and financial funding of the project. The 120 MW power project will be funded by the Asian Development Bank.[3] [4]

Environment issue

This hydroelectric project has suffered some serious damage due to contamination of Kopili river with acid mine discharge from open cast coal mines and rat hole mining in Meghalaya.[5] [6] [7]

Incidents

2019

The Hydro project site was submerged and flooded following a pipeline burst on 7 October 2019. 4 people has since been reported missing in the overflowing project site. The burst happened on an old pipe, which was repaired the previous year.[8] [9]

2022

Incident at Khandong Power Plant claimed lives of three persons.[10]

See also

External links

Notes and References

  1. Web site: Kopili Hydro Electric Project. Water Resources Information System of India. https://web.archive.org/web/20190220041715/http://india-wris.nrsc.gov.in/wrpinfo/index.php?title=Kopili_Hydroelectric_Project_JH00099. 20 February 2019. 21 February 2019. dead.
  2. Web site: National Register of Large Dams (NRLD) - India. 21 Feb 2019.
  3. Web site: Lower Kopili clearance on hold. 31 August 2017. The Telegraph India. 21 Feb 2019.
  4. Web site: Environmental Assessment for Lower Kopili Hydropower Project. April 2018. Asian Development Bank. 21 Feb 2019.
  5. News: Two Kopili power units shut down - Mining in Jaintia Hills affects machines. 20 June 2013. The Telegraph India. 21 Feb 2019.
  6. Web site: Renovation & Modernisation of Kopili Hydro Electric Plant. 21 Feb 2019.
  7. News: Concern over contamination of Kopili water. 20 June 2012. The Assam Tribune online. 21 Feb 2019.
  8. News: Assam dam disaster: Ruptured pipeline was repaired a year ago - The Hindu. The Hindu. 9 October 2019. Karmakar. Rahul.
  9. Web site: Four days on, hope fades for families of those trapped in Assam's Kopili hydel project. 10 October 2019.
  10. Web site: Assam: Explosion at Kopili Hydel Project Claims Lives of 3 NEEPCO Employee - Sentinelassam. 26 March 2022.