Stung Treng Dam

{{Infobox dam

| name = Stung Treng Dam

| name_official =

| image =

| image_size =

| image_caption =

| image_alt =

| location_map = Cambodia

| location_map_size =

| location_map_caption =

| coordinates = {{coord|13|3|31.14|N|105|59|0.42|E|type:landmark|display=inline,title}}

| country = Cambodia

| location = Stung Treng Province

| status = P

| construction_began =

| opening = after 2030

| demolished =

| cost =

| owner =

| dam_type = Earth core rockfill gravity dam

| dam_length = {{convert|10844|m|ft|abbr=on}}

| dam_height = {{convert|22|m|ft|abbr=on}}

| dam_width_crest =

| dam_width_base =

| dam_volume =

| dam_crosses = Mekong River

| spillway_count =

| spillway_type =

| spillway_capacity = {{convert|73500|m3/s|abbr=on}}

| res_name =

| res_capacity_total = {{convert|70000000|m3|acre.ft|abbr=on|lk=out}}

| res_catchment =

| res_surface = {{convert|211|km2|sqmi|abbr=on}}

| res_max_depth =

| res_tidal_range =

| plant_operator =

| plant_commission =

| plant_decommission =

| plant_type =

| plant_hydraulic_head = {{convert|15.2|m|ft|abbr=on}}

| plant_turbines = 10 x 98 MW

| plant_capacity = 980 MW (max. planned)

| plant_annual_gen =

| website =

| extra =

}}

The Stung Treng Dam is a proposed hydroelectric dam on the Mekong River in Stung Treng Province, Cambodia. It would be located on the mainstream of the Lower Mekong River. The project is controversial for several reasons, including its possible impact on the fisheries, as well as other ecological and environmental factors.

History

In 2007, the Russian company Bureyagesstroy, a subsidiary of RusHydro,{{cite news |last1=Flynn |first1=Gerald |last2=Pry |first2=Nehru |title=Cambodian mega dam's resurrection on the Mekong 'the beginning of the end' |url=https://news.mongabay.com/2022/09/cambodian-mega-dams-resurrection-on-the-mekong-the-beginning-of-the-end/ |work=Mongabay Environmental News |date=15 September 2022}} received a license to conduct a feasibility study on a dam.{{cite news

| url = http://www.khmerpropertynews.com/?inc=content.php&id=1099

| title = Russian firm seeks dam deal

| publisher = Khmer Property News

| date =

| accessdate = 2011-01-22

| archive-date = 2011-07-13

| archive-url = https://web.archive.org/web/20110713145353/http://www.khmerpropertynews.com/?inc=content.php&id=1099

| url-status = dead

}} The feasibility study was carried out and the company asked permission to build the hydroelectric power station.

{{cite news

| url = http://www.powergenworldwide.com/index/display/articledisplay/372570/articles/power-engineering-international/volume-17/issue-12/regulars/world-news/asia-pacific.html

| title = Russia is seeking permission to build a $2bn, 960 MW hydropower plant in Stung Treng Province

| publisher = PennWell Corporation

| work = Power Engineering International

| date = 2009-12-09

| accessdate = 2011-01-22}}

However, on December 9, 2009, a memorandum of understanding was signed between the Cambodian Government and the Vietnam Industrial and Urban Area Investment Development Corp (IDICO) to conduct a new feasibility study on the dam.{{cite news

| url = http://www.intellasia.net/news/articles/infra_resources/111281837.shtml

| title = Vietnamese investors to launch feasibility study of Stung Treng hydropower plant

| agency = Intellasia News Services

| date = 2009-12-10

| accessdate = 2011-01-22

| archive-date = 2011-07-23

| archive-url = https://web.archive.org/web/20110723155949/http://www.intellasia.net/news/articles/infra_resources/111281837.shtml

| url-status = dead

}} The results of this survey have not been released.

In March 2020, due to ecological concerns, the Cambodian government halted all hydroelectric developments on the Mekong River until 2030, pushing back the Stung Treng dam project along with its neighbour the Sambor Dam project.{{Cite news|last=Kijewski|first=Leonie|url=https://www.voanews.com/a/east-asia-pacific_cambodia-halts-hydropower-construction-mekong-river-until-203/6186756.html|title=Cambodia Halts Hydropower Construction on Mekong River Until 2030|date=1 April 2020|work=VOA News|access-date=8 April 2020}}

Despite the ban, The Royal Group conglomerate received permission from the Ministry of Mines and Energy to conduct feasibility studies for the dam at three potential sites in 2022.

Description

The Stung Treng Dam would be an earth core rock-fill gravity dam. If completed, the dam's crest would be {{convert|10844|m}} long and {{convert|22|m}} high. Its rated head would be {{convert|15.2|m}}. It would have an installed capacity of 980 MW, and would, on average, generate 4,870 GWh per year. The dam's reservoir, which would extend well beyond the mainstream canal, would have an active storage of {{convert|70000000|m3|acre.ft|lk=out}}, and would inundate an area of {{convert|211|km2}}. The reservoir would be {{convert|50|km}} long.

Impact

Multiple independent agencies, including International Rivers, the Save the Mekong campaign and others have raised concerns about the dam's construction.

{{cite web

|title=Mekong Mainstream Dams

|url=http://www.internationalrivers.org/en/southeast-asia/mekong-mainstream-dams

|publisher=International Rivers

|accessdate=22 January 2011}}

In addition, Cambodia is a member of the Mekong River Commission, which requires prior notification of hydropower construction on the river's mainstream – i.e. plans for the Stung Treng will be subject to scrutiny by Laos, Thailand and Vietnam. A report authorized by the Mekong River Commission and released in January 2010 recommended that the Stung Treng along with the Sambor Dam be delayed for 10 years.{{cite news

|last=Baxter|first=Will

|title=Cambodia 'most exposed' to dams threat

|url=http://www.phnompenhpost.com/index.php/2010110344430/National-news/cambodia-most-exposed-to-dams-threat.html

|newspaper=The Phnom Penh Post

|accessdate=2011-01-22

|date= 2010-11-03

|url-access=subscription

}}

A 2012 study by the Ministry of Agriculture, Forestry and Fisheries's Inland Fisheries Research and Development Institute found that the Stung Treng dam would reduce yields of fish and other aquatic animals by 6% to 24%.{{cite web |title=Food and nutrition security vulnerability to mainstream hydropower dam development in Cambodia |url=https://media.business-humanrights.org/media/documents/files/media/cambodia-dams-and-food-security-2013.pdf |publisher=Inland Fisheries Research and Development Institute |page=6 |date=December 2012}}

The dam site lies within the Stung Treng Ramsar Site,{{cite web|title=The Annotated Ramsar List: Cambodia |url=http://www.ramsar.org/cda/en/ramsar-pubs-annolist-annotated-ramsar-16689/main/ramsar/1-30-168%5E16689_4000_0__ |publisher=The Convention on Wetlands |accessdate=22 January 2011 |date=January 10, 2000 |url-status=dead |archive-url=https://web.archive.org/web/20120405064940/http://www.ramsar.org/cda/en/ramsar-pubs-annolist-annotated-ramsar-16689/main/ramsar/1-30-168%5E16689_4000_0__ |archive-date=2012-04-05}} which effectively obliges the Royal Cambodian Government to ‘actively support' the three 'pillars' of the Ramsar Convention:

ensuring the conservation and wise use of wetlands it has designated as Wetlands of International Importance,
including as far as possible the wise use of all wetlands in national environmental planning,
consulting with other Parties about implementation of the Convention, especially in regard to transboundary wetlands, shared water systems, and shared species.

{{cite book

|title= Strategic Environmental Impact Assessment for Hydropower on the Mekong Mainstream. Final Report, prepared for the Mekong River Commission

|author = International Centre for Environmental Management

|url= http://www.mrcmekong.org/ish/SEA/SEA-Main-Final-Report.pdf

|publisher=Mekong River Commission

|volume = 1

|page = 31

|date = 2009-10-23

|accessdate = 2011-02-06}}

It is expected that fish migration routes (which support the world's largest inland fishery on the Tonlé Sap) will be essentially wholly impeded. The two proposed dams of the Sambor and the Stung Treng would have the Mekong river basin's highest sediment trapping efficiencies of all the Lower Mekong Basin's proposed mainstream projects, destabilizing downstream channels between Kratié and Phnom Penh and reducing over bank siltation in the Cambodian floodplain.

If built, an estimated 21 villages with 2,059 households and 10,617 people will be displaced with the construction of the dam.

{{cite book

|title=Mainstream Project Profile Summaries

|author = International Centre for Environmental Management

|url=http://www.mrcmekong.org/ish/IR_VOL2__final.pdf

|publisher=Mekong River Commission

|volume = 2

|pages = 77–81

|date = 2009-10-23

|accessdate = 2011-02-06}}