Geehi Dam
{{Use Australian English|date=May 2013}}{{Use dmy dates|date=September 2022}}
{{Infobox dam
| name = Geehi Dam
| name_official =
| image = Geehi Dam.jpg
| image_size = 250px
| image_caption = Wall and spillway.
| image_alt =
| location_map = New South Wales
| location_map_size =
| location_map_caption = Location of Geehi Dam in
New South Wales
| coordinates = {{coord|36|18|16.8|S|148|18|55.8|E|type:landmark_region:AU-NSW|display=inline,title}}
| country = Australia
| location = Snowy Mountains, New South Wales
| status = O
| construction_began =
| opening = 1966
| demolished =
| cost =
| owner = Snowy Hydro
| dam_type = E
| dam_height = {{Convert|91|m}}
| dam_height_thalweg =
| dam_height_foundation=
| dam_length = {{Convert|265|m}}
| dam_width_crest =
| dam_width_base =
| dam_volume = {{Convert|1.421|e6m3}}
| dam_elevation_crest =
| dam_crosses = Geehi River
| spillway_count = 1
| spillway_type = Uncontrolled bell-mouth spillway
| spillway_capacity = {{convert|1534|m3/s}}
| res_name = Geehi Reservoir
| res_capacity_total = {{convert|21093|ML}}
| res_capacity_active =
| res_capacity_inactive=
| res_catchment = {{convert|149|km2}}
| res_surface = {{convert|700|ha}}
| res_elevation =
| res_max_depth =
| res_max_length =
| res_max_width =
| res_tidal_range =
| plant_operator = Snowy Hydro
| plant_commission = 1967
| plant_decommission =
| plant_type = C
| plant_hydraulic_head = {{convert|460.2|m}}
| plant_turbines = 10
| plant_capacity = {{convert|950|MW}}
| plant_annual_gen =
| website =
| extra =
}}
Geehi Dam is a major ungated rockfill embankment dam across the Geehi River in the Snowy Mountains of New South Wales, Australia. The reservoir impounded by the dam is known as Geehi Reservoir.
History
The structure was completed by Thiess Brothers in 1966,{{cite web|url=http://adb.anu.edu.au/biography/thiess-sir-leslie-charles-les-17797|title=Thiess, Sir Leslie Charles (Les) (1909–1992)|publisher=Australian Dictionary of Biography|access-date=3 January 2019|archive-date=30 June 2017|archive-url=https://web.archive.org/web/20170630071544/http://adb.anu.edu.au/biography/thiess-sir-leslie-charles-les-17797|url-status=live}} and is one of the sixteen major dams that comprise the Snowy Mountains Scheme, a vast hydroelectricity and irrigation complex constructed in south-east Australia between 1949 and 1974 that is now run by Snowy Hydro.
Location and features
The dam is located within what is now the Snowy Valleys local government area. It was constructed by Thiess Brothers based on engineering plans developed under contract by the Snowy Mountains Hydroelectric Authority.
The dam wall, comprising {{convert|1421000|m3}} of rockfill with an earth core, is {{Convert|91|m}} high and {{Convert|265|m}} long. At 100% capacity the dam wall holds back {{convert|21093000|m3|abbr=}} of water. The surface area of Geehi Reservoir is {{convert|70|ha}} and the catchment area is {{convert|149|km2}}. The uncontrolled bell-mouth spillway has a diameter of {{convert|32|m}} and is capable of discharging up to {{convert|1534|m3/s}}.{{cite web|url=http://www.ancold.org.au/wp-content/uploads/2012/10/Dams-Australia-2010-v1-for-website.xls|format=Excel (requires download)|title=Register of Large Dams in Australia|publisher=The Australian National Committee on Large Dams Incorporated|year=2010|access-date=11 May 2013|work=Dams information|archive-date=12 December 2013|archive-url=https://web.archive.org/web/20131212120804/http://www.ancold.org.au/wp-content/uploads/2012/10/Dams-Australia-2010-v1-for-website.xls|url-status=dead}}{{cite web|title=Dams |url=http://www.snowyhydro.com.au/energy/hydro/dams/ |work=Snowy Mountains Scheme |publisher=Snowy Hydro |access-date=11 May 2013 |url-status=dead |archive-url=https://web.archive.org/web/20130503080615/http://www.snowyhydro.com.au/energy/hydro/dams/ |archive-date=3 May 2013 }}
=Power generation=
{{see also|Snowy Mountains Scheme#Snowy Mountains Hydro-Electric Scheme{{!}}Snowy Mountains Hydro-Electric Scheme|Murray Hydroelectric Power Station#Murray-1{{!}}Murray 1 Power Station}}
Geehi Reservoir receives water from Island Bend Pondage through the Snowy-Geehi tunnel. Water from Geehi Reservoir is carried via the Murray 1 pressure tunnel to the Murray 1 power station, which is rated for a hydraulic head of {{convert|460.2|m}} and has a total generating capacity of {{convert|950|MW}} (a net generation of {{convert|1413|GWh}} per annum).{{cite web|url=http://globalenergyobservatory.org/form.php?pid=43176|title=Murray-I Hydroelectric Power Plant Australia|work=Global Energy Observatory|date=11 May 2012|access-date=11 May 2013|archive-date=22 March 2014|archive-url=https://web.archive.org/web/20140322013516/http://globalenergyobservatory.org/form.php?pid=43176|url-status=live}} The outlet structure for the Snowy-Geehi tunnel is shared with the intake of the Murray 1 pressure tunnel and is accessible by a suspended footbridge.
See also
{{Portal|Energy|New South Wales}}
References
{{reflist}}
External links
- {{cite book|url=http://www.water.nsw.gov.au/ArticleDocuments/34/water_environment_snowy_report_snowy_flow_expert_panel_report.pdf.aspx|date=May 2009|publisher=NSW Department of Water and Energy|isbn=978-0-7347-5656-5|title=Expert panel environmental flow assessment of various rivers affected by the Snowy Mountains Scheme|author1=Bevitt, R.|author2=Erskine, W.|author3=Gillespie, G.|author4=Harriss, J.|author5=Lake, P.|author6=Miners, B.|author7=Varley, I.}}
{{Snowy Mountains Scheme|state=autocollapse}}
{{WaterNSW|state=autocollapse}}
{{Riverina|state=autocollapse}}
Category:Snowy Mountains Scheme
Category:Dams in New South Wales
Category:Dams completed in 1966