{{short description|Hydroelectric power project in Assam, India}} {{Use dmy dates|date = February 2019}} {{Use Indian English|date = February 2019}} {{Infobox dam | name = Khandong Dam | name_official = Kopili Hydro Electric Project | image = The Khandong dam.jpg | image_caption = The Khandong dam | coordinates = {{coord|25.5286173|N|92.6327813|E|type:landmark_region:IN|display=inline,title|format=dms}} | mapframe = yes | location = [[Assam]], [[India]] | construction_began = | opening = {{start date and age|1984}} | purpose = P | cost = <!-- [[Indian rupee|Rs.]] xxxx crore --> | owner = [[Government of India]] | operator = | dam_type = Concrete Gravity | dam_crosses = [[Kopili River]] | dam_length = {{Convert|243|m|ft}} | dam_width_base = | spillway_type = | spillway_capacity = 15417 m³/s | res_name = Kopili Reservoir | res_capacity_total = 166800 | res_catchment = <!-- {{Convert|xx|km2|mi2}} --> | res_surface = {{Convert|13.36|km2|mi2}} | res_max_depth = | plant_name = Khandong Power House | plant_coordinates = {{coord|25.5168635|N|92.6660943|E|format=dms}} | plant_operator = [[North Eastern Electric Power Corporation Limited|NEEPCO]] | plant_commission = 8 March 1984 | plant_decommission = | plant_type = | plant_turbines = 3×25 [[Megawatt|MW]] | plant_capacity = 75 [[Megawatt|MW]] | plant_annual_gen = 363.9 MU | website = {{URL|https://neepco.co.in/projects/hydro-projects/kopili-hydro-electric-plant|NEEPCO}} | extra = | dam_height = {{Convert|66|m|ft}} }} {{Infobox dam | name = Umrong Dam | name_official = Kopili Hydro Electric Project | image = UMRONGSU.jpg | image_caption = View of Umrong Reservoir from [[Umrangso]] | coordinates = {{coord|25.5284962|N|92.7126092|E|type:landmark|display=inline|format=dms}} | construction_began = | opening = {{start date and age|1988}} | purpose = P | cost = <!-- [[Indian rupee|Rs.]] xxxx crore --> | dam_type = Concrete Gravity | dam_crosses = Umrang river | dam_length = {{Convert|143|m|ft}} | dam_height = {{Convert|30|m|ft}} | dam_width_base = | spillway_type = Ogee Radial | spillway_capacity = 554.7 m³/s | res_name = Umrong Reservoir | res_capacity_total = 175000 | res_catchment = <!-- {{Convert|xx|km2|mi2}} --> | res_surface = {{Convert|16|km2|mi2}} | res_max_depth = | plant_name = Kopili Power House | plant_coordinates = {{coord|25.586020|N|92.723019|E}} | plant_operator = [[North Eastern Electric Power Corporation Limited|NEEPCO]] | plant_commission = {{start date and age|4 July 1988}} | plant_decommission = | plant_type = | plant_turbines = 4×50 [[Megawatt|MW]] | plant_capacity = 200 [[Megawatt|MW]] | plant_annual_gen = }}
'''Kopili Hydro Electric Project''' is a {{convert|275|MW}}, [[hydroelectric]] power project on the [[Kopili River|Kopili river]] and its [[tributary]], Umrong stream. It is located in [[Dima Hasao district]] of [[Assam]] state in [[India]].<ref name=":0">{{Cite web|url=http://india-wris.nrsc.gov.in/wrpinfo/index.php?title=Kopili_Hydroelectric_Project_JH00099|title=Kopili Hydro Electric Project|website=Water Resources Information System of India|archive-url=https://web.archive.org/web/20190220041715/http://india-wris.nrsc.gov.in/wrpinfo/index.php?title=Kopili_Hydroelectric_Project_JH00099|archive-date=20 February 2019|access-date=21 February 2019|url-status=dead}}</ref> The project is developed and operated by [[North Eastern Electric Power Corporation Limited]]. It is an important project since the [[States and union territories of India|Indian state]] of Assam, [[Arunachal Pradesh]], [[Manipur]], [[Meghalaya]], [[Mizoram]], [[Nagaland]] and [[Tripura]] benefit from this project.{{citation needed|date=October 2019}}
== 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.<ref name=":0" /> 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 {{coord|25.5168|N|92.6660|E}} and Khandong dam is located at {{coord|25.5286|N|92.6327|E}}. Khandong Stage-I powerhouse has 2x25 MW Francis type turbines, generating 50 MW power at peak. It is connected to Kopili reservoir via a {{convert|4.5|m}} diameter, {{convert|2852|m}} 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 {{convert|480|m}} long water conductor system, which was provisioned for at the time of stage-I construction. Third turbine was commissioned on 26 July 2004.<ref name=":0" /><ref name=":2">{{Cite web|url=http://www.indiaenvironmentportal.org.in/files/file/NRLD%202018.pdf|title=National Register of Large Dams (NRLD) - India|access-date=21 Feb 2019|archive-date=20 February 2019|archive-url=https://web.archive.org/web/20190220072735/http://www.indiaenvironmentportal.org.in/files/file/NRLD%202018.pdf|url-status=dead}}</ref>
=== Kopili I & II === The Kopili power house stage-I and stage-II are located on the right bank of Kopili river in geographical location {{coord|25.586|N|92.723|E}}. The related Umrong dam, completed in 1988, is located at {{coord|25.5284|N|92.7126|E}}. 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 {{convert|4.6|m}} diameter, {{convert|5.5|km}} long concrete-lined head race tunnel. The first unit of stage-I was commissioned on 4 July 1988.<ref name=":2" />
=== 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.<ref>{{Cite web|url=https://www.telegraphindia.com/north-east/lower-kopili-clearance-on-hold/cid/1437966|title=Lower Kopili clearance on hold|date=31 August 2017|website=[[The Telegraph (Calcutta)|The Telegraph]] India|access-date=21 Feb 2019}}</ref><ref>{{Cite web|url=https://www.adb.org/sites/default/files/project-documents/47101/47101-004-eia-en_3.pdf|title=Environmental Assessment for Lower Kopili Hydropower Project|date=April 2018|website=[[Asian Development Bank]]|access-date=21 Feb 2019}}</ref>
==Environment issue== This hydroelectric project has suffered some serious damage due to contamination of Kopili river with [[Acid mine drainage|acid mine discharge]] from open cast coal mines and [[Rat-Hole Mining|rat hole mining]] in Meghalaya.<ref>{{Cite news|url=https://www.telegraphindia.com/north-east/two-kopili-power-units-shut-down-mining-in-jaintia-hills-affects-machines/cid/291312|title=Two Kopili power units shut down - Mining in Jaintia Hills affects machines|date=20 June 2013|work=[[The Telegraph (Calcutta)|The Telegraph]] India|access-date=21 Feb 2019}}</ref><ref>{{Cite web|url=http://www.cea.nic.in/reports/others/hydro/herm/technical3/ts34.pdf|title=Renovation & Modernisation of Kopili Hydro Electric Plant|access-date=21 Feb 2019|archive-date=21 February 2019|archive-url=https://web.archive.org/web/20190221165641/http://www.cea.nic.in/reports/others/hydro/herm/technical3/ts34.pdf|url-status=dead}}</ref><ref>{{Cite news|url=http://www.assamtribune.com/scripts/detailsnew.asp?id=jun2012/state06|title=Concern over contamination of Kopili water|date=20 June 2012|work=[[The Assam Tribune]] online|access-date=21 Feb 2019|archive-date=24 December 2013|archive-url=https://web.archive.org/web/20131224095243/http://www.assamtribune.com/scripts/detailsnew.asp?id=jun2012/state06|url-status=dead}}</ref>
==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.<ref>{{cite news| url = https://www.thehindu.com/news/national/assam-dam-disaster-ruptured-pipeline-was-repaired-a-year-ago/article29629623.ece| title = Assam dam disaster: Ruptured pipeline was repaired a year ago - The Hindu| newspaper = The Hindu| date = 9 October 2019| last1 = Karmakar| first1 = Rahul}} </ref><ref>{{Cite web|url=https://www.hindustantimes.com/india-news/four-days-on-hope-fades-for-families-of-those-trapped-in-assam-s-kopili-hydel-project/story-bQNQWAuewpMdVWTUqoWTiP.html|title = Four days on, hope fades for families of those trapped in Assam's Kopili hydel project|date = 10 October 2019}}</ref>
===2022=== Incident at Khandong Power Plant claimed lives of three persons.<ref>{{Cite web|url=https://www.sentinelassam.com/north-east-india-news/assam-news/assam-explosion-at-kopili-hydel-project-claims-lives-of-3-neepco-employee-584609|title = Assam: Explosion at Kopili Hydel Project Claims Lives of 3 NEEPCO Employee - Sentinelassam|date = 26 March 2022}}</ref>
==Map==
{{OSM Location map|coord={{coord|25|32|26|N|92|40|00|E}} <!-- Map center --> |float=left|zoom=11|width=650 <!-- width and height of the frame. numeric input - do not add px --> |height=250|caption={{center|Kopili Hydro Electric Project}}|minimap=|mini-file=|mini-width=|mini-height=|minipog-x=|minipog-y=|scalemark=|shape=<!-- Khandong Dam -->|mark-coord1={{coord|25.5286173|N|92.6327813|E}}|mark1=Steel pog.svg|mark-size1=10|label1=Khandong Dam|label-size1=10|label-color1=black|label-pos1=top|mark-title1=Khandong Dam|mark-image1=|mark-description1=Khandong Dam on Kopili River <!-- Khandong Powerhouse --> |mark-coord2={{coord|25.5168635|N|92.6660943|E}}|mark2=Red pog.svg|mark-size2=10|label2=Khandong P.H.|label-size2=12|label-color2=red|label-pos2=left|mark-title2=Khandong Power House|mark-image2=|mark-description2=75 (MW) <!-- Umrong Dam --> |mark-coord3={{coord|25.5284962|N|92.7126092|E}}|mark3=Steel pog.svg|mark-size3=10|label3=Umrong Dam|label-size3=10|label-color3=black|label-pos3=top|mark-title3=Umrong Dam|mark-image3=|mark-description3=Umrong Dam on Umrong stream <!-- Kopili Powerhouse --> |mark-coord4={{coord|25.586020|N|92.723019|E}}|mark4=Red pog.svg|mark-size4=10|label4=Kopili P.H.|label-size4=12|label-color4=red|label-pos4=left|mark-title4=Kopili Power House|mark-image4=|mark-description4=200 (MW) <!-- Kopili Reservoir --> |mark5=Waterbody.svg|mark-size5=10|mark-coord5={{coord|25.508|N|92.6168|E}}|label5=Kopili Reservoir|label-size5=10|label-color5=blue|label-pos5=bottom|mark-title5=Kopili Reservoir <!-- Umrong Reservoir --> |mark6=Waterbody.svg|mark-size6=10|mark-coord6={{coord|25.498|N|92.686|E}}|label6=Umrong Reservoir|label-size6=10|label-color6=blue|label-pos6=bottom|mark-title6=Umrong Reservoir }} {{clear left}}
== See also == * [[List of dams and reservoirs in Assam]]
== References == {{Reflist}}
== External links == * [https://neepco.co.in/projects/hydro-projects/kopili-hydro-electric-plant North Eastern Electric Power Corporation Limited - Kopili Hydro Electric Project] {{NTPC Power Stations}} {{Hydrography of North-east India}}
[[Category:Dams in Assam]] [[Category:Hydroelectric power stations in India]] [[Category:Dima Hasao district]] [[Category:1984 establishments in Assam]] [[Category:1988 establishments in Assam]]