Rodundwerk II is a 295 MW hydro power station in Vorarlberg, Austria. It is operated by Vorarlberge Illwerke AG. Based on reported annual generation of 337 GWh, it can supply roughly 96k homes. It ranks #16 of 131 Austria power plants by installed capacity. Commissioned in 1976, it is around 50 years old — long-established. As a non-combustion source, it has no direct CO₂ emissions from generation. In context, hydro supplies about 51.8% of Austria's electricity; the national grid averages 117 gCO₂/kWh (83.6% low-carbon) (2025).
Plant data: WRI Global Power Plant Database (CC BY 4.0), id WRI1019159.
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 198 MW for Rodund I 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 · L100000600134; fuel: WRI GPPD
In context: how this plant compares
At 295 MW, Rodundwerk II is well above the median hydro plant in Austria (30 MW). 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
- 13%, from 337 GWh of reported generation; the median for 18 hydro plants in Austria that report generation is 44%
- Generation trend
- 133 GWh in 2015 and 337 GWh in 2017 (+153%)
- Highest and lowest year
- 2017: 337 GWh; 2015: 133 GWh
- Share of Austria hydro capacity
- 3.2% of 9,237 MW across 96 plants in this dataset
- Age among peers
- 51 of 94 dated hydro plants in Austria 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 Vorarlberge Illwerke AG.
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) — Northern Hemisphere, latitude 47.1°N — which shapes how much energy it can produce and how its output varies through the year.
Monthly mean temperature
Heating degree-days here run 143% above 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: 98/100 — this site sits in the top 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 mild atmospheric environment (estimated ISO 9223 class C2 — Low), 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 #7 largest hydro power plant of 96 in Austria by capacity.
Austria has 96 hydro power plants in this dataset, together about 9,237 MW of capacity.
Nearby power plants
- Rodundwerk I · Hydro · 198 MW · Vorarlberg
- Lünerseewerk · Hydro · 280 MW · Vorarlberg
- Kopswerk II · Hydro · 525 MW · Vorarlberg
- Schlappin · Hydro · 6.1 MW · Grisons
- Vermuntwerk · Hydro · 157 MW · Vorarlberg
- Kopswerk I · Hydro · 247 MW · Vorarlberg
Location
Coordinates 47.0847, 9.8744 from WRI Global Power Plant Database (CC BY 4.0). View on OpenStreetMap.
Frequently asked questions
What type of power plant is Rodundwerk II?
Rodundwerk II is a 295 MW hydro power plant in Vorarlberg, Austria, commissioned in 1976.
How much electricity does Rodundwerk II generate?
Rodundwerk II generates about 337 GWh of electricity per year.
Who operates Rodundwerk II?
Rodundwerk II is operated by Vorarlberge Illwerke AG.