{{Short description|Dam and power station in Tasmania, Australia}} {{Use Australian English|date=June 2015}} {{Use dmy dates|date=May 2026}} {{Infobox dam | name = Mackintosh Dam | name_official = | image = | image_size = 240 | image_caption = | image_alt = | location_map = Australia Tasmania | location_map_size = 240 | location_map_caption = Location of the dam in [[Tasmania]] | location_map_alt = | mapframe = yes | coordinates = {{coord|-41.699112|145.647769|region:AU-TAS_type:landmark|display=inline,title|format=dms}} | country = Australia | location = [[Western Tasmania|Western]] [[Tasmania]] | purpose = P | status = O | construction_began = | opening = {{start date|1981}} | demolished = | cost = | owner = [[Hydro Tasmania]] | operator = | dam_type = H | dam_crosses = [[Mackintosh River]] | dam_height = {{cvt|75|m}} | dam_height_foundation= | dam_height_thalweg = | dam_length = {{cvt|465|m}} | dam_elevation_crest = | dam_width_crest = | dam_width_base = | dam_volume = {{cvt|927|e3m3}} | spillway_count = 1 | spillway_type = [[Spillway#Types|Uncontrolled]] | spillway_capacity = {{cvt|1021|m3/s}} | res_name = [[Lake Mackintosh]] <!-- Would be good to use this map of the reservoir somehow. <mapframe frameless width="300" height="300" latitude="-41.6965" longitude="145.7018" zoom="9" align="center"> { "type": "ExternalData", "service": "geoshape", "ids": "Q1800988", "properties": { "title": "Lake Mackintosh", "fill": "#05286D", "stroke-width": 0 } } </mapframe> --> | res_capacity_total = {{cvt|913.69|GL|acre.ft}} | res_capacity_active = | res_capacity_inactive= | res_catchment = {{cvt|512|km2}} | res_surface = {{cvt|276.1|ha}} | res_max_length = {{cvt|17.5|km}} | res_max_width = {{cvt|3.5|km}} | res_max_depth = {{cvt|60|m}} | res_elevation = {{cvt|210|to|230|m}} {{AHD}} | res_tidal_range = | plant_name = Mackintosh Power Station | plant_coordinates = {{coord|41|41|24|S|145|38|24|E|type:landmark}} | plant_operator = Hydro Tasmania | plant_commission = {{start date|1982}} | plant_decommission = | plant_type = C | plant_hydraulic_head = {{cvt|61|m}} | plant_turbines = 1 x {{cvt|81|MW}}<br />[[Fuji Heavy Industries|Fuji]] [[Francis turbine|Francis-type]] | plant_capacity = {{cvt|81|MW}} | plant_capacity_factor= 0.85 | plant_annual_gen = {{cvt|394|GWh}} | website = {{URL|hydro.com.au/energy/our-power-stations/pieman|hydro.com.au}} | extra = <ref name=ANCOLD/><ref name="Bonzle-LakeM"/> }}
The '''Mackintosh Dam''' is a concrete-faced rock-fill [[embankment dam]] across the [[Mackintosh River]], located in [[Western Tasmania]], Australia. Located not far from the main dam is the '''Tullabardine Dam''', a [[Dam#Types|saddle dam]] across the Tullabardine Creek. Both dams were completed in 1981 and together they formed the resultant [[reservoir]], [[Lake Mackintosh]], established for the purpose of generating [[hydroelectricity]] via the '''Mackintosh Power Station''', a [[Hydroelectricity#Conventional (dams)|conventional]] hydroelectric [[power station]].
The dam, its reservoir, and the power station are owned and operated by [[Hydro Tasmania]].
== Dam and reservoir overview == === The two dams === The concrete-faced [[rock-filled dam]] wall of the Mackintosh Dam is {{convert|75|m}} high and {{convert|465|m}} long. When full, Lake Burbury has capacity of {{convert|913.69|GL|acre.ft|lk=on}} and covers {{convert|276.1|ha}}, drawn from a [[drainage basin|catchment area]] of {{convert|512|km2}}. The single [[spillway#Types|uncontrolled spillway]] is capable of discharging {{convert|1021|m3/s}}.<ref name=ANCOLD>{{cite web |title=Register of Large Dams Australia-2015 |date=January 2022 |access-date=2026-03-05 |url=https://ancold.org.au/information-resources/dams-information/ |work=[[ANCOLD]] |format=[[Microsoft Excel|Excel]]. Requires download. Row 322}}</ref>
The saddle dam, the Tullabardine Dam, is also a concrete-faced rock-filled dam that is {{convert|25|m}} high and {{convert|214|m}} long, located at {{coord|-41.683794|145.652983|region:AU-TAS_type:landmark|display=inline|format=dms}}.<ref name="ANCOLD-T">{{cite web |title=Register of Large Dams Australia-2015 |date=January 2022 |access-date=2026-03-05 |url=https://ancold.org.au/information-resources/dams-information/ |work=[[ANCOLD]] |format=[[Microsoft Excel|Excel]]. Requires download. Row 509}}</ref>
=== Reservoir === The reservoir, Lake Mackintosh, runs north–south past Mount Farrell, adjacent to the town of {{TAScity|Tullah}}. The reservoir is {{convert|17.5|km}} long, {{convert|3.5|km}} wide, and the shore is approximately {{convert|83|km}} in circumference. The reservoir has three large islands and five small [[islet]]s.<ref name="Bonzle-LakeM">{{cite web|url=http://www.bonzle.com/c/a?a=p&p=168380&cmd=sp|title=Map of Lake Mackintosh, TAS|work=Bonzle Digital Atlas of Australia|date=n.d.|access-date=25 May 2018}}</ref> The reservoir is fed by the Mackintosh, [[Sophia River|Sophia]], Fury, Southwell, and Brougham rivers and the Mackintosh and Tullabardine creeks. The reservoir's outflow feeds the Mackintosh Power Station through [[Lake Rosebery (Tasmania)|Lake Rosebery]].<ref>{{cite web |url=http://www.discovertasmania.com/attraction/lakemackintosh |title=Lake Mackintosh |work=Discover Tasmania |date=2018 |access-date=25 May 2018}}</ref> The [[Murchison River (Tasmania)|Murchison River]] feeds into Lake Mackintosh through the [[Murchison Dam]], to the south. The reservoir's deepest point is approximately {{convert|60|m}} deep at the base of the main dam. It is one of the larger sized water impoundments of the Pieman power scheme.<ref>{{cite map|url=http://www.environment.gov.au/heritage/publications/strategy/pubs/tas-state-party-report-att-e.pdf|archive-url=https://webarchive.nla.gov.au/awa/20100309063300/http://pandora.nla.gov.au/pan/118182/20100309-1733/www.environment.gov.au/heritage/publications/strategy/pubs/tas-state-party-report-att-e.pdf|url-status=dead|archive-date=2010-03-09|title=Tasmanian Wilderness World Heritage Area and Surrounding Land Use 2007|work=Department of the Environment, Water, Heritage and the Arts|publisher=Commonwealth of Australia|year=2008|access-date=25 May 2018}}{{cbignore|bot=medic}}</ref>
The main basin of the reservoir was originally a [[Gymnoschoenus sphaerocephalus|Button Grass]] swamp prior to inundation. The [[Cradle Mountain-Lake St Clair National Park]] as a component part of the [[Tasmanian Wilderness World Heritage Area]], has its western boundary lying to the east of the lake shores. The [[Murchison Highway]] borders the reservoir to the west.
== Hydroelectric power station == Part of the [[Pieman River]] scheme that comprises four hydroelectric power stations, the Mackintosh Power Station is the second station in the scheme. The power station is located aboveground at the foot of the dam wall. Water from Lake Mackintosh is fed to the power station by a {{convert|200|m|ft|adj=mid|-long}} single tunnel.<ref name=hydro>{{cite web |url=http://www.hydro.com.au/energy/our-power-stations/pieman |title=Our power stations {{!}} Pieman {{!}} Energy |work=[[Hydro Tasmania]] |date= |access-date=4 July 2015}}</ref>
The power station was commissioned in 1982 by the [[Hydro Tasmania|Hydro Electric Corporation (TAS)]] and the station has one [[Fuji Heavy Industries|Fuji]] [[Francis turbine|Francis-type]] [[Water turbine|turbine]], with a generating capacity of {{convert|81|MW}} of electricity. The station output, estimated to be {{convert|394|GWh|TJ|lk=on}} annually,<ref name=ANCOLD/> is fed to [[TasNetworks]]' transmission grid via a 13.8 k[[voltage|V]]/220 kV Fuji generator transformer to the outdoor switchyard.<ref>{{cite web |url=https://www.hydro.com.au/docs/default-source/clean-energy/our-power-stations/power-station-fact-sheets/mackintosh-power-station-fact-sheet.pdf?sfvrsn=9bcc9b28_2|title=Mackintosh Power Station: Technical fact sheet|work=Pieman Catchment|publisher=[[Hydro Tasmania]]|access-date=18 June 2023|archive-url=https://web.archive.org/web/20230618034418/https://www.hydro.com.au/docs/default-source/clean-energy/our-power-stations/power-station-fact-sheets/mackintosh-power-station-fact-sheet.pdf?sfvrsn=9bcc9b28_2|archive-date=18 June 2023|url-status=live}}</ref>
The water discharged from Mackintosh Power Station flows into [[Bastyan Dam#Reservoir|Lake Rosebery]] for use in the [[Bastyan Dam#Hydroelectric power station|Bastyan Power Station]].<ref name=hydro/>
== See also == {{stack|{{Portal|Renewable energy|Australia|Water}}}} * [[List of power stations in Tasmania]] * {{section link|List of reservoirs and dams in Australia|Tasmania}} * {{section link|List of lakes of Australia|Tasmania}}
==References== {{reflist}}
==Further reading== *{{cite web|url=https://www.hydro.com.au/docs/default-source/environment-page/pieman-sustainability-review/pieman-sustainability-review-full-report.pdf?sfvrsn=85a1e328_0|title=Pieman Sustainability Review: Information review of the Anthony-Pieman hydropower scheme|publisher=[[Hydro Tasmania]]|date=February 2015|access-date=18 June 2023|archive-url=https://web.archive.org/web/20230618034627/https://www.hydro.com.au/docs/default-source/environment-page/pieman-sustainability-review/pieman-sustainability-review-full-report.pdf?sfvrsn=85a1e328_0|archive-date=18 June 2023|url-status=live}}
{{Dams in Tasmania|state=collapsed}} {{EnergyTasmania}} {{Lakes of Tasmania|state=autocollapse}} {{Western Tasmania |state=autocollapse}}
[[Category:1981 establishments in Australia]] [[Category:Concrete-face rock-fill dams]] [[Category:Dams completed in 1981]] [[Category:Energy infrastructure completed in 1987]] [[Category:Hydroelectric power stations in Tasmania]] [[Category:Hydro Tasmania dams]] [[Category:Pieman River Power Development]] [[Category:Reservoirs in Tasmania|Mackintosh]]