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124.8 MW Hydro operating in Lee, IA — Midcontinent Independent Transmission System Operator, Inc..
124.8 MW
Nameplate Capacity
15
Generators
units
Conventional Hydroelectric
Technology
1913
Operating Since
Coordinates
40.3965, -91.3719
County
Lee, IA
Nearby Plants
| Field | EIA | GEM | Wikidata |
|---|---|---|---|
| Operator | Union Electric Co - (MO) | Union Electric | Ameren Missouri |
| Owner(s) | Union Electric Co - (MO) | Ameren | — |
| Status | Operating | operating | — |
The Keokuk hydroelectric plant, located in Lee County, Iowa, has a total capacity of 124.8 MW. It began operating in 1913 and utilizes conventional hydroelectric technology. The plant consists of 15 generators and is fueled by water (WAT). It is owned by Ameren and operated by Union Electric Co - (MO). Keokuk is the largest hydroelectric plant in Iowa, and ranks 156th nationally among 194 hydroelectric facilities.
In the most recent year with available data, Keokuk generated 888,279 MWh, achieving a capacity factor of 80.2%. The plant operates within the Midcontinent Independent Transmission System Operator (MISO) balancing authority and the SERC NERC region. Financial data indicates an installed cost of $1773.28 per kW. The plant's financial information is sourced from FERC filings.
Generated from EIA, GEM, and public data sources
ISO/RTO
MISO
Market
ISO/RTO Member
NERC Region
SERC — SERC Reliability Corporation
Balancing Authority
65.9K MWh
Latest Month
888.3K MWh
Annual Generation
80.2%
Capacity Factor
Run-of-river hydro · UNION ELECTRIC COMPANY · Data from 2015–2024
$2,032/kW
Installed Cost
$4.9/MWh
Operating Cost
Annual Capital & Operating Expenses
Cumulative Installed Cost
Per-Unit Cost Trends
Point of Interconnection
Nearest Substation
Keokuk
Substation Distance
< 10 km
Coord Source
OSM spatial
Market Position
ISO/RTO Market
MISO
LMP Node
AMMO.KEOKUK10
Pricing Hub
MINN.HUB
Alt. Hub / Zone
ILLINOIS.HUB
Location Type
Generation Node
Node Source
EIA-860 direct report
Last updated 2026-03-26
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ask pi about KeokukMidcontinent Independent Transmission System Operator, Inc.. (MISO)
Grid Voltage
69.0 kV
Regulatory Status
RE — Regulated
Entity Type
Investor-Owned Utility
Sector
Electric Utility