Seminoe — United States of America

Hydro power plant in Wyoming, United States of America. Approximate location 42.1561, -106.9085.

HydroWyomingUnited States of AmericaPre Construction

Seminoe is a 51.6 MW hydro power plant in Wyoming, United States of America. It ranks #3597 of 10,884 United States of America power plants by installed capacity. As a non-combustion source, it has no direct CO₂ emissions from generation. In context, hydro supplies about 5.3% of United States of America's electricity; the national grid averages 384 gCO₂/kWh (43.0% low-carbon) (2025).

51.6MW installed capacity
1939Pre Construction

Plant data: WRI Global Power Plant Database (CC BY 4.0), id USA0004182.

Data status

Known data

FacilitySeminoe WRI
CountryUnited States of America · Wyoming WRI
Coordinates42.1561, -106.9085 WRI
FuelHydro WRI
MW installed capacity51.6 MW GEM · 2026 · L100001023347; operating plant capacity
Verification noteQuality label backfilled from existing source-backed capacity provenance on 2026-07-05; capacity value was not changed. source-verified
OwnerU S Bureau of Reclamation WRI
Commissioned1939 WRI

Calculated from dataset

Capacity rank in country#3597 / 10884 calculated
Fuel-specific rank in country#290 / 1449 calculated
Capacity vs country/fuel peers6.45× · 8 MW · n=1449 calculated
Climate5.7°C · HDD 4,507 derived from coordinates
Environmental severityC2 · 29/100 derived from coordinates

Not available

TechnologyNot available not in dataset
GWh reported / yrNot available not in dataset
CO₂ emissionsnot applicable not applicable

Known, modelled and calculated values are kept separate. Missing fields are shown as unavailable.

Data provenance

Source of the capacity and fuel values:

capacity: GEM · 2026 · L100001023347; fuel: WRI GPPD

In context: how this plant compares

At 51.6 MW, Seminoe is well above the median hydro plant in United States of America (8 MW). Its current lifecycle status is “Pre Construction” — so it is not yet, or no longer, generating at full output. 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.

How it compares & nearby plants

The #290 largest hydro power plant of 1449 in United States of America by capacity.

United States of America has 1449 hydro power plants in this dataset, together about 102,513 MW of capacity.

Nearby power plants

Location

Coordinates 42.1561, -106.9085 from WRI Global Power Plant Database (CC BY 4.0). View on OpenStreetMap.

Frequently asked questions

What type of power plant is Seminoe?

Seminoe is a 51.6 MW hydro power plant in Wyoming, United States of America, Pre Construction 1939.

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