Gratkorn Mill power station — Austria

Gratkorn Mill power station is a 70 MW gas power plant in Styria, Austria. It is operated by Sappi Austria Produktions GmbH & Co KG [100%]. Based on its capacity (estimated), it can supply roughly 79k homes (estimated). It ranks #57 of 131 Austria power plants by installed capacity. Commissioned in 2004, it is around 22 years old — relatively modern. Its annual emissions of 202,975 t CO₂/yr (EU ETS verified (EUTL 2023)) are equivalent to about 47k cars driven for a year. In context, gas supplies about 11.9% 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 GOGPT_gratkornmill_austri.

Data provenance

Source of the capacity and fuel values:

capacity: GEM · 2026 · L100000400001; fuel: GEM GOGPT

In context: how this plant compares

At 70 MW, Gratkorn Mill power station is below the median gas plant in Austria (153 MW). Technically it is described as CCGT; combined-cycle with a heat-recovery steam generator (HRSG). Gas plants burn natural gas either in open-cycle turbines for fast peaking, or in combined-cycle units that recover exhaust heat in an HRSG to reach roughly 55–62% efficiency — the cleanest-burning fossil option.

Capacity comparison computed from the WRI Global Power Plant Database; fuel-type context is general engineering background.

202,975 t CO₂/yr — in everyday terms

This facility's annual emissions are roughly equivalent to:

Equivalencies via US EPA Greenhouse Gas Equivalencies; emissions per EU ETS verified (EUTL 2023) (measured for US EPA/EU ETS, modelled for Climate TRACE).

Key facts

Share of Austria gas capacity

1.4% of 4,974 MW across 15 plants in this dataset

Age among peers

9 of 14 dated gas plants in Austria are older

Calculated from the capacity and generation records in this dataset (WRI Global Power Plant Database (CC BY 4.0)).

Capacity vs largest gas plants in Austria

Installed capacity (MW), WRI Global Power Plant Database (CC BY 4.0).

Owner

Operated by Sappi Austria Produktions GmbH & Co KG [100%].

Climate zone & how it works

This gas plant burns natural gas in a turbine — often in a combined-cycle setup — to generate electricity. It sits in a warm-summer humid continental climate (Köppen Dfb) — Northern Hemisphere, latitude 47.1°N — which shapes how much energy it can produce and how its output varies through the year.

Climate zone & typical temperatures: Köppen-Geiger world climate classification (Kottek et al. 2006, 0.5° grid).

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 #12 largest gas power plant of 15 in Austria by capacity.

Austria has 15 gas power plants in this dataset, together about 4,974 MW of capacity.

Nearby power plants

• Gratkorn · Hydro · 11 MW · Styria
• Friesach · Hydro · 12 MW · Styria
• Peggau · Hydro · 13 MW · Styria
• Voitsberg power station · Coal · 330 MW · Styria
• Zeltweg power station · Coal · 137 MW · Styria
• Arnstein · Hydro · 30 MW · Styria

Location

Coordinates 47.13505, 15.33541 from WRI Global Power Plant Database (CC BY 4.0). View on OpenStreetMap.

Frequently asked questions