How many hydroelectric power plants are in Indiana?

6, with 108 MW of nameplate capacity between them, spread over 5 counties. That is the EIA-860M operating count for 2026-07.

Is there a map of Indiana 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 Indiana?

Markland, at 78 MW. The table is sorted largest first, so the rest follow it.

Is there a hydroelectric power plant near me in Indiana?

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 Indiana's hydroelectric power plants?

No single ISO or RTO covers most of them. EIA files each plant against its own balancing authority, which in Indiana is largely a vertically integrated utility rather than an organised market.

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.

Hydroelectric Power Plants in Indiana

Every operating hydroelectric power plant in Indiana on EIA-860M for 2026-07: 6 plants, 22 generating units and 108 MW of nameplate capacity across 5 counties.

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: 6; 22 generating units
Nameplate capacity: 108 MW
Counties: 5
Grid operator: Mixed; no single ISO covers a majority

Map of hydroelectric power plants in Indiana

Every one of the 6 plants is drawn at the coordinate EIA files for it.

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Hydro · 6

List of hydroelectric power plants in Indiana

Sort by any column. Capacity is nameplate, summed across every generating unit EIA lists at the site.

hydroelectric power plants in Indiana

MarklandConventional Hydroelectric	Duke Energy Indiana, LLC	Switzerland	77.7	3	1967	Operating
OakdaleConventional Hydroelectric	Northern Indiana Pub Serv Co	Carroll	11.8	3	1925	Operating
Norway (IN)Conventional Hydroelectric	Northern Indiana Pub Serv Co	White	7.3	4	1923	Operating
Twin BranchConventional Hydroelectric	Indiana Michigan Power Co	St Joseph	4.8	8	1989	Operating
ElkhartConventional Hydroelectric	Indiana Michigan Power Co	Elkhart	3.4	3	1913	Operating
Notre Dame HydroConventional Hydroelectric	University of Notre Dame	St Joseph	2.5	1	2022	Operating

Largest hydroelectric power plants in Indiana

1MarklandSwitzerland County, Indiana77.7 MW
2OakdaleCarroll County, Indiana11.8 MW
3Norway (IN)White County, Indiana7.3 MW
4Twin BranchSt Joseph County, Indiana4.8 MW
5ElkhartElkhart County, Indiana3.4 MW
6Notre Dame HydroSt Joseph County, Indiana2.5 MW

Hydroelectric power plants by county in Indiana

The county EIA files against each plant. It is the fastest way to find the plant nearest a given town.

County	Plants	Nameplate MW
Switzerland	1	77.7
Carroll	1	11.8
St Joseph	2	7.3
White	1	7.3
Elkhart	1	3.4

Hydroelectric Power Plants in Indiana: FAQ

How many hydroelectric power plants are in Indiana?: 6, with 108 MW of nameplate capacity between them, spread over 5 counties. That is the EIA-860M operating count for 2026-07.
Is there a map of Indiana 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 Indiana?: Markland, at 78 MW. The table is sorted largest first, so the rest follow it.
Is there a hydroelectric power plant near me in Indiana?: 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 Indiana's hydroelectric power plants?: No single ISO or RTO covers most of them. EIA files each plant against its own balancing authority, which in Indiana is largely a vertically integrated utility rather than an organised market.
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.