FRIEIRA GRUPO 1 is a 160.6 MW hydro power station in Galicia, Spain. It is operated by GAS NATURAL FENOSA GENERACION S.L.U.. Based on its capacity (estimated), it can supply roughly 161k homes (estimated). It ranks #105 of 899 Spain power plants by installed capacity. Commissioned in 1970, it is around 56 years old — an older, legacy facility. As a non-combustion source, it has no direct CO₂ emissions from generation. In context, hydro supplies about 11.4% of Spain's electricity; the national grid averages 154 gCO₂/kWh (74.6% low-carbon) (2025).
Plant data: WRI Global Power Plant Database (CC BY 4.0), id WRI1006486.
Data status
Known data
Calculated from dataset
Not available
Known, modelled and calculated values are kept separate. Missing fields are shown as unavailable.
Data provenance
Capacity and fuel are the upstream open-dataset record, not yet matched to a 2026 registry or GEM entry.
capacity: WRI GPPD; fuel: WRI GPPD
In context: how this plant compares
At 160.6 MW, FRIEIRA GRUPO 1 is well above the median hydro plant in Spain (55.2 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
- Share of Spain hydro capacity
- 1.0% of 15,680 MW across 124 plants in this dataset
- Age among peers
- 65 of 116 dated hydro plants in Spain are older
Calculated from the capacity and generation records in this dataset (WRI Global Power Plant Database (CC BY 4.0)).
Capacity vs largest hydro plants in Spain
Installed capacity (MW), WRI Global Power Plant Database (CC BY 4.0).
Owner
Operated by GAS NATURAL FENOSA GENERACION S.L.U.. 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 Mediterranean climate (Köppen Csb) — Northern Hemisphere, latitude 42.2°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 7% 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: 53/100 — 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 marine corrosion 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 #26 largest hydro power plant of 124 in Spain by capacity.
Spain has 124 hydro power plants in this dataset, together about 15,680 MW of capacity.
Nearby power plants
- P.E. TEA · Wind · 48.1 MW · Galicia
- CASTRELO GRUPO 1 · Hydro · 135.6 MW · Galicia
- PORTO GR 1 · Hydro · 17.6 MW · Galicia
- Alto Minho I · Wind · 240 MW · Galicia
- SALAS GRUPO 1 · Hydro · 52.8 MW · Galicia
- Alagoa de Cima · Wind · 13.5 MW · Viana do Castelo
Location
Coordinates 42.1538, -8.1933 from WRI Global Power Plant Database (CC BY 4.0). View on OpenStreetMap.
Frequently asked questions
What type of power plant is FRIEIRA GRUPO 1?
FRIEIRA GRUPO 1 is a 160.6 MW hydro power plant in Galicia, Spain, commissioned in 1970.
Who operates FRIEIRA GRUPO 1?
FRIEIRA GRUPO 1 is operated by GAS NATURAL FENOSA GENERACION S.L.U..