How many hydro power plants are in MISO?

MISO has 170 operating utility-scale hydro power plants with 4.9 GW of capacity, according to the EIA's monthly survey of power plants.

What is the largest hydro power plant in MISO?

Ludington in Mason County, Michigan is the largest, at 1,979 MW. It came online in 1973.

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

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

Who is developing hydro power plants in MISO?

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 MISO

MISO has 170 operating hydro power plants with 4.9 GW of capacity.

Operating170

Updated monthly. Last updated November 2026.

Under 50 MW50–249 MW250 MW and up

Updated monthly. Last updated November 2026.

MISO had 166 hydro power plants online in 2016 and 170 in 2026

166

167

168

169

170

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 MISO

Operating, by capacity

#	Hydro power plant	Location	Year online	Capacity
1	Ludington	Mason County, Michigan	1973	1,979 MW
2	Taum Sauk	Reynolds County, Missouri	1963	408 MW
3	Osage Dam	Miller County, Missouri	1953	208 MW
4	Sidney A Murray Jr Hydroelectric	Concordia Parish, Louisiana	1990	192 MW
5	Keokuk	Lee County, Iowa	1913	125 MW
6	Dam 2	Desha County, Arkansas	1999	103 MW
7	Cannelton Hydroelectric Plant	Hancock County, Kentucky	2016	88 MW
8	Toledo Bend	Newton County, Texas	1969	81 MW
9	Markland	Switzerland County, Indiana	1967	78 MW
10	Smithland Hydroelectric Plant	Livingston County, Kentucky	2017	76 MW

Hydro power plants that came online most recently in MISO

Newest first

#	Hydro power plant	Location	Year online	Capacity
1	Byllesby	Dakota County, Minnesota	2026	4 MW
2	Red Rock Hydro Plant	Marion County, Iowa	2021	55 MW
3	RC Thomas Hydroelectric Project	Polk County, Texas	2020	27 MW
4	Smithland Hydroelectric Plant	Livingston County, Kentucky	2017	76 MW
5	Twin Falls (WI)	Florence County, Wisconsin	2016	9 MW
6	Cannelton Hydroelectric Plant	Hancock County, Kentucky	2016	88 MW
7	New Badger	Outagamie County, Wisconsin	2014	8 MW
8	Redwood Falls	Redwood County, Minnesota	2013	1 MW
9	SAF Hydroelectric LLC	Hennepin County, Minnesota	2011	10 MW
10	Four Mile Hydropower Project	Alpena County, Michigan	2005	2 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 MISO

How many hydro power plants are in MISO?: MISO has 170 operating utility-scale hydro power plants with 4.9 GW of capacity, according to the EIA's monthly survey of power plants.
What is the largest hydro power plant in MISO?: Ludington in Mason County, Michigan is the largest, at 1,979 MW. It came online in 1973.
How many hydro power plants were built in MISO in 2025?: 0 hydro power plants came online in MISO in 2025, with 0 MW of capacity.
Who is developing hydro power plants in MISO?: 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.