Hydroelectric Power Plants in Illinois
Every operating hydroelectric power plant in Illinois on EIA-860M for 2026-07: 7 plants, 21 generating units and 35 MW of nameplate capacity across 7 counties, most of it inside MISO.
As of 2026-07 (inventory dated 2026-07-31) · EIA-860M Preliminary Monthly Electric Generator Inventory · eia.gov/…/july_generator2026.xlsx · eia.gov/…/eia860m
- Plants
- 7
- 21 generating units
- Nameplate capacity
- 35 MW
- Counties
- 7
- Grid operator
- MISO
- covers most of these plants
Map of hydroelectric power plants in Illinois
Every one of the 7 plants is drawn at the coordinate EIA files for it.
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- Hydro · 7
List of hydroelectric power plants in Illinois
Sort by any column. Capacity is nameplate, summed across every generating unit EIA lists at the site.
| Lockport PowerhouseConventional Hydroelectric | Metro Wtr Recl Dist Grtr Chi | Will | 16 | 2 | 1999 | Out of service but expected to return to service in next calendar year |
| City of Peru Hydro-Electric Generating SConventional Hydroelectric | City of Peru - (IL) | Lasalle | 7.6 | 4 | 1996 | Operating |
| Dayton HydroConventional Hydroelectric | Eagle Creek Renewable Energy, LLC | LaSalle | 3.6 | 3 | 1925 | Operating |
| Dixon Hydroelectric DamConventional Hydroelectric | Eagle Creek Renewable Energy, LLC | Lee | 3 | 5 | 1925 | Operating |
| Upper SterlingConventional Hydroelectric | City of Rock Falls - (IL) | Whiteside | 2.2 | 2 | 1988 | Out of service but expected to return to service in next calendar year |
| Kankakee Hydro FacilityConventional Hydroelectric | City of Kankakee - (IL) | Kankakee | 1.2 | 3 | 1991 | Out of service and NOT expected to return to service in next calendar year |
| RocktonConventional Hydroelectric | Eagle Creek Renewable Energy, LLC | Winnebago | 1.1 | 2 | 1929 | Operating |
Largest hydroelectric power plants in Illinois
- 1Lockport PowerhouseWill County, Illinois16 MW
- 2City of Peru Hydro-Electric Generating SLasalle County, Illinois7.6 MW
- 3Dayton HydroLaSalle County, Illinois3.6 MW
- 4Dixon Hydroelectric DamLee County, Illinois3 MW
- 5Upper SterlingWhiteside County, Illinois2.2 MW
- 6Kankakee Hydro FacilityKankakee County, Illinois1.2 MW
- 7RocktonWinnebago County, Illinois1.1 MW
Hydroelectric power plants by county in Illinois
The county EIA files against each plant. It is the fastest way to find the plant nearest a given town.
| County | Plants | Nameplate MW |
|---|---|---|
| Will | 1 | 16 |
| Lasalle | 1 | 7.6 |
| LaSalle | 1 | 3.6 |
| Lee | 1 | 3 |
| Whiteside | 1 | 2.2 |
| Kankakee | 1 | 1.2 |
| Winnebago | 1 | 1.1 |
Hydroelectric Power Plants in Illinois: FAQ
- How many hydroelectric power plants are in Illinois?
- 7, with 35 MW of nameplate capacity between them, spread over 7 counties. That is the EIA-860M operating count for 2026-07.
- Is there a map of Illinois hydroelectric power plants?
- Yes — the map above. Each dot is one hydroelectric power plant, sized by nameplate capacity and placed at the coordinates EIA files for it.
- Which is the largest hydroelectric power plant in Illinois?
- Lockport Powerhouse, at 16 MW. The table is sorted largest first, so the rest follow it.
- Is there a hydroelectric power plant near me in Illinois?
- The county roll-up below groups every plant by county, which is the quickest way to find the one closest to a given town.
- Which grid operator runs Illinois's hydroelectric power plants?
- Most of them sit inside MISO, according to the balancing-authority code EIA files against each plant. Live conditions for that market are on this site.
- How current is this, and what is left out?
- EIA-860M for 2026-07. Conventional hydroelectric. Pumped storage is counted separately. Plants below 1 MW are not surveyed by EIA and so are absent; retirements and additions after 2026-07 arrive with the next monthly release.