55.2 MW Hydro operating in Marion, IA — Midcontinent Independent Transmission System Operator, Inc..
55.2 MW
Nameplate Capacity
2
Generators
units
Conventional Hydroelectric
Technology
2021
Operating Since
Coordinates
41.3697, -92.9808
County
Marion, IA
Nearby Plants
Owner data does not fully agree across sources.
EIA typically reports the operating utility, while GEM resolves to the financial owner or parent corporation. Both can be correct.
| Field | EIA | GEM | Wikidata |
|---|---|---|---|
| Operator | Western Minnesota Mun Pwr Agny | Western Minnesota Municipal Power Agency | — |
| Owner(s) | Western Minnesota Mun Pwr Agny | Missouri River Energy Services | — |
| Status | Operating | operating | — |
The Red Rock Hydro Plant is a 55.2 MW hydroelectric facility located in Marion County, Iowa. The plant began operating in 2021 and utilizes conventional hydroelectric technology. It is owned by Missouri River Energy Services and operated by Western Minnesota Municipal Power Agency. The facility houses two generators and ranks as the second-largest of four hydroelectric plants in Iowa, and 284th out of 1464 nationally.
In its most recent year of operation, the Red Rock Hydro Plant generated 179,271 MWh of electricity, achieving a capacity factor of 36.8%. The plant operates within the Midcontinent Independent Transmission System Operator (MISO) balancing authority, which falls under the North American Electric Reliability Corporation (NERC) region designated as MRO.
Generated from EIA, GEM, and public data sources
NERC Region
MRO
Balancing Authority
Midcontinent Independent Transmission System Operator, Inc..
Grid Voltage
69 kV
Regulatory Status
RE
Entity Type
Political Subdivision
Sector
Electric Utility
8.8K MWh
Latest Month
179.3K MWh
Annual Generation
36.8%
Capacity Factor
No financial data available for this plant.
Market Position
ISO/RTO Market
MISO
LMP Node
MEC.RRHP_U1
Pricing Hub
MINN.HUB
Location Type
Generation Node
Node Source
Curated node match
Last updated 2026-03-14
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