Explore the largest hydro power plants in SPP and see all the utility-scale hydro projects in SPP on a map.
Last updated: May 2026
On this page, you can explore our real-time database of hydro power plants in SPP. Each month, we track hydro projects and update our list of the largest hydro power plants in SPP.
As of May 2026, there are 24 utility-scale hydro power plants in SPP, according to Cleanview's project tracker. Their total operating capacity is 3,363 MW.
Total Hydro Power Plants
24
Total Capacity
3,363 MW
Built in 2025
0
Map of hydro power plants in SPP. Marker size reflects capacity — only facilities with reported capacity data are shown.
786 MW
Year Operational: June 1963
Location: Hughes, South Dakota
583 MW
Year Operational: May 1960
Location: Mercer, North Dakota
538 MW
Year Operational: July 1966
Location: Buffalo, South Dakota
320 MW
Year Operational: January 1956
Location: Charles Mix, South Dakota
259 MW
Year Operational: May 1971
Location: Mayes, Oklahoma
132 MW
Year Operational: January 1957
Location: Cedar, Nebraska
130 MW
Year Operational: August 1946
Location: Mayes, Oklahoma
128 MW
Year Operational: May 1964
Location: Mayes, Oklahoma
100 MW
Year Operational: June 1970
Location: McCurtain, Oklahoma
7 MW
Year Operational: December 2012
Location: Douglas, Kansas
37 MW
Year Operational: August 1989
Location: Kay, Oklahoma
32 MW
Year Operational: December 1988
Location: Crawford, Arkansas
50 MW
Year Operational: November 1984
Location: Keith, Nebraska
259 MW
Year Operational: May 1971
Location: Mayes, Oklahoma
100 MW
Year Operational: June 1970
Location: McCurtain, Oklahoma
26 MW
Year Operational: September 1969
Location: Pike, Arkansas
70 MW
Year Operational: May 1968
Location: Tulsa, Oklahoma
538 MW
Year Operational: July 1966
Location: Buffalo, South Dakota
Cleanview