Dlouhé Stráně I — Czech Republic

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.

Data provenance

Source of the capacity and fuel values:

capacity: GEM · 2026 · L100000601467; fuel: WRI GPPD

In context: how this plant compares

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.

Key facts

Load factor

11%, from 622 GWh of reported generation

Generation trend

703 GWh in 2015 and 622 GWh in 2017 (−12%)

Highest and lowest year

2016: 711 GWh; 2017: 622 GWh

Share of Czech Republic hydro capacity

35.8% of 1,815 MW across 8 plants in this dataset

Age among peers

7 of 8 dated hydro plants in Czech Republic 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 CEZ Group. 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 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.

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 #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.

Nearby power plants

• Rýmařov Solar Power Plant · Solar · 1.1 MW · Moravian-Silesian
• Třemešná Solar Power Plant · Solar · 1 MW · Moravian-Silesian
• Slapy · Hydro · 144 MW · Moravian-Silesian
• Rudoltice - Steal Solar Power Plant · Solar · 1 MW · Pardubicky
• Rudoltice - Will Solar Power Plant · Solar · 1.4 MW · Pardubicky
• Lukavice Solar Power Plant · Solar · 1.6 MW · Pardubicky

Location

Coordinates 50.0854, 17.1794 from WRI Global Power Plant Database (CC BY 4.0). View on OpenStreetMap.

Frequently asked questions