Trevallyn is a 80 MW hydro power plant in Tasmania, Australia. It is operated by Hydro-Electric Corporation (Tasmania). Based on reported annual generation of 353 GWh, it can supply roughly 101k homes. It ranks #215 of 536 Australia power plants by installed capacity. Commissioned in 1955, it is around 71 years old — an older, legacy facility. As a non-combustion source, it has no direct CO₂ emissions from generation. In context, hydro supplies about 4.3% of Australia's electricity; the national grid averages 525 gCO₂/kWh (38.6% low-carbon) (2025).
Plant data: WRI Global Power Plant Database (CC BY 4.0), id AUS0000032.
Data status
Known data
Calculated from dataset
Not available
Known, modelled and calculated values are kept separate. Missing fields are shown as unavailable.
Capacity provenance
The public capacity above is the current source-record value. A 2026 tracker candidate lists 103 MW for Trevallyn hydroelectric plant, but it is not used as the public primary value until scope is verified (unit vs operating vs installed/project total).
Data provenance
Source of the capacity and fuel values:
capacity: GEM · 2026 · L100000600084; fuel: WRI GPPD
In context: how this plant compares
At 80 MW, Trevallyn is well above the median hydro plant in Australia (45 MW). Technically it is described as run-of-river. Hydropower converts the energy of falling or flowing water into electricity; output depends on rainfall and reservoir level, and large dams also provide grid balancing and storage.
Capacity comparison computed from the WRI Global Power Plant Database; fuel-type context is general engineering background.
Key facts
- Load factor
- 50%, from 353 GWh of reported generation; the median for 50 hydro plants in Australia that report generation is 35%
- Generation trend
- 524 GWh in 2013 and 353 GWh in 2018 (−32%)
- Highest and lowest year
- 2014: 536 GWh; 2015: 349 GWh
- Share of Australia hydro capacity
- 0.9% of 8,878 MW across 73 plants in this dataset
- Age among peers
- 4 of 41 dated hydro plants in Australia are older
Calculated from the capacity and generation records in this dataset (WRI Global Power Plant Database (CC BY 4.0)).
Reported generation trend
Annual generation (GWh), WRI Global Power Plant Database (CC BY 4.0).
Owner
Operated by Hydro-Electric Corporation (Tasmania). All plants by this company →
Local climate & thermal context
This hydro plant converts the energy of falling or flowing water through hydro turbines. It sits in a temperate oceanic climate (Köppen Cfb) — Southern Hemisphere, latitude 41.4°S — which shapes how much energy it can produce and how its output varies through the year.
Monthly mean temperature
Heating degree-days here run 12% below the median power plant in this dataset — a proxy for how much extra energy heated equipment must replace through its surfaces in winter.
Climate heat-demand index: 46/100 — this site sits in the mid third of the power plants we cover by heating degree-days.
Climate normals: WorldClim 2.1 (1970–2000 monthly normals, 10 arc-min, CC BY 4.0); zone: Köppen-Geiger world climate classification (Kottek et al. 2006, 0.5° grid). Degree-days & heat-demand index computed by PowerAtlas — a modelled heat-demand proxy, not a measured site figure.
Site climate & environmental severity
This site sits in a corrosive environment (estimated ISO 9223 class C4 — High), with humidity / wetness the leading environmental stress.
Indicative estimate via the ISO 9223:2012 informative method (atmospheric corrosivity from temperature, time-of-wetness and airborne salinity), using WorldClim climate normals, the Köppen-Geiger class and coast distance. Indicative, not a measured corrosion rate.
How it compares & nearby plants
The #27 largest hydro power plant of 73 in Australia by capacity.
Australia has 73 hydro power plants in this dataset, together about 8,878 MW of capacity.
Nearby power plants
- Remount · Waste · 2.2 MW · Tasmania
- Bell Bay (Bell Bay Three) · Gas · 115 MW · Tasmania
- Tamar Valley · Gas · 390 MW · Tasmania
- Poatina · Hydro · 100 MW · Tasmania
- Tods Corner · Hydro · 1.7 MW · Tasmania
- Devils Gate · Hydro · 60 MW · Tasmania
Location
Coordinates -41.4226, 147.1119 from WRI Global Power Plant Database (CC BY 4.0). View on OpenStreetMap.
Frequently asked questions
What type of power plant is Trevallyn?
Trevallyn is a 80 MW hydro power plant in Tasmania, Australia, commissioned in 1955.
How much electricity does Trevallyn generate?
Trevallyn generates about 353 GWh of electricity per year.
Who operates Trevallyn?
Trevallyn is operated by Hydro-Electric Corporation (Tasmania).