Hydro power plant in Olomoucky, Czech Republic. Approximate location 50.0854, 17.1794.
HydroOlomouckyCzech Republicpumped storage
Dlouhé Stráně I is a 650 MW hydro power station in Olomoucky, Czech Republic. It is operated by CEZ Group. Based on reported annual generation of 622 GWh, it can supply roughly 178k homes. It ranks #11 of 481 Czech Republic power plants by installed capacity. Commissioned in 1996, it is around 30 years old — long-established. As a non-combustion source, it has no direct CO₂ emissions from generation. In context, hydro supplies about 2.3% of Czech Republic's electricity; the national grid averages 401 gCO₂/kWh (59.2% low-carbon) (2025).
Plant data: WRI Global Power Plant Database (CC BY 4.0), id WRI1019204.
Known, modelled and calculated values are kept separate. Missing fields are shown as unavailable.
The capacity and/or fuel fields on this page include a source-backed provenance label from GEM, an official registry, Wikidata, OSM, or a cross-source match.
capacity: GEM tracker 2026 (location L100000601467); fuel: WRI source-record fuel
At 650 MW, Dlouhé Stráně I is well above the median hydro plant in Czech Republic (144 MW). Technically it is described as pumped storage. 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.
Annual generation (GWh), WRI Global Power Plant Database (CC BY 4.0).
Operated by CEZ Group. All plants by this company →
This hydro plant converts the energy of falling or flowing water through hydro turbines. It sits in a warm-summer humid continental climate (Köppen Dfb) — Northern Hemisphere, latitude 50.1°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 106% 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: 94/100 — 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.
For a plant’s outdoor hardware — heat-recovery steam generators (HRSG), expansion joints, valves, flanges and their insulation — the local climate sets how fast unprotected steel and coatings degrade. This site sits in a mild atmospheric environment (estimated ISO 9223 class C2 — Low), with humidity / wetness the leading environmental stress.
Higher environmental severity is exactly where protective removable insulation pays back most: a sheltered micro-climate slows corrosion, UV and thermal-cycling damage and extends outdoor hardware service life. This is an indicative site-climate context — not a condition assessment of any specific plant or operator.
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.
The #1 largest hydro power plant of 8 in Czech Republic by capacity.
Czech Republic has 8 hydro power plants in this dataset, together about 1,815 MW of capacity.
Coordinates 50.0854, 17.1794 from WRI Global Power Plant Database (CC BY 4.0). View on OpenStreetMap.
Dlouhé Stráně I is a 650 MW source-record hydro power plant in Olomoucky, Czech Republic, commissioned in 1996.
Dlouhé Stráně I generates about 622 GWh of electricity per year.
Its output is enough to supply roughly 177,771 homes.
Dlouhé Stráně I is operated by CEZ Group.
