How many hydro power plants are in Wyoming?

Wyoming has 16 operating utility-scale hydro power plants with 0.3 GW of capacity, according to the EIA's monthly survey of power plants.

What is the largest hydro power plant in Wyoming?

Fremont Canyon in Natrona County, Wyoming is the largest, at 67 MW. It came online in 1961.

How many hydro power plants were built in Wyoming in 2025?

0 hydro power plants came online in Wyoming in 2025, with 0 MW of capacity.

Who is developing hydro power plants in Wyoming?

Interconnection queues list each project under a project company, not the developer behind it. Cleanview researches the developer of every project and has them on paid plans.

Hydro power plants in Wyoming

Wyoming has 16 operating hydro power plants with 0.3 GW of capacity.

Operating16

Updated monthly. Last updated November 2026.

Under 50 MW50–249 MW250 MW and up

Updated monthly. Last updated November 2026.

Wyoming had 16 hydro power plants online in 2016 and 16 in 2026

2016’162017’172018’182019’192020’202021’212022’222023’232024’242025’252026’26

Hydro power plants online at the end of each year. Source: EIA-860M, compiled by Cleanview.

The 10 largest hydro power plants in Wyoming

Operating, by capacity

#	Hydro power plant	County	Year online	Capacity
1	Fremont Canyon	Natrona County	1961	67 MW
2	Seminoe	Carbon County	1939	52 MW
3	Alcova	Natrona County	1955	41 MW
4	Glendo	Platte County	1959	38 MW
5	Kortes	Carbon County	1951	36 MW
6	Buffalo Bill	Park County	1992	18 MW
7	Boysen	Fremont County	1952	15 MW
8	Fontenelle	Lincoln County	1968	10 MW
9	Guernsey	Platte County	1928	6 MW
10	Heart Mountain	Park County	1948	5 MW

Hydro power plants that came online most recently in Wyoming

Newest first

#	Hydro power plant	County	Year online	Capacity
1	Swift Creek	Lincoln County	2010	2 MW
2	Spirit Mountain	Park County	1994	5 MW
3	Buffalo Bill	Park County	1992	18 MW
4	Garland Canal Power Plant	Park County	1983	3 MW
5	Fontenelle	Lincoln County	1968	10 MW
6	Fremont Canyon	Natrona County	1961	67 MW
7	Glendo	Platte County	1959	38 MW
8	Alcova	Natrona County	1955	41 MW
9	Boysen	Fremont County	1952	15 MW
10	Kortes	Carbon County	1951	36 MW

The developer behind each project is on paid plans. See plans

How Cleanview tracks hydro power plants

Operating hydro power plants come from the EIA's monthly survey of power plants. Planned projects come from the grid operators' interconnection queues. We research who is developing each one, since a queue lists a project company, not its owner.

Questions about hydro power plants in Wyoming

How many hydro power plants are in Wyoming?: Wyoming has 16 operating utility-scale hydro power plants with 0.3 GW of capacity, according to the EIA's monthly survey of power plants.
What is the largest hydro power plant in Wyoming?: Fremont Canyon in Natrona County, Wyoming is the largest, at 67 MW. It came online in 1961.
How many hydro power plants were built in Wyoming in 2025?: 0 hydro power plants came online in Wyoming in 2025, with 0 MW of capacity.
Who is developing hydro power plants in Wyoming?: Interconnection queues list each project under a project company, not the developer behind it. Cleanview researches the developer of every project and has them on paid plans.