Milner Hydro — Plant Summary
- EIA Plant ID
- 7190
- Capacity
- 59.5 MW
- Primary Fuel
- Hydro
- Technology
- Conventional Hydroelectric
- Status
- Operating
- Location
- Cassia, ID
- Operating Since
- 1992
- Generators
- 3
- Operator
- Idaho Power Co
- Parent Company
- IDACORP
- Annual Generation
- 98,723 MWh
- Capacity Factor
- 18.9%
- Balancing Authority
- Idaho Power Company
- ISO/RTO
- —
- NERC Region
- WECC
Milner Hydro
OperatingHydro
Ranked #10 of 76 Hydro plants in ID#271 of 1454 nationally
59.5 MW Hydro operating in Cassia, ID — Idaho Power Company
EIAGEMWD
59.5 MW
Nameplate Capacity
3
Generators
units
Conventional Hydroelectric
Technology
1992
Operating Since
Location
Coordinates
42.5269, -114.0372
County
Cassia, ID
Nearby Plants
- BypassHydro9.9 MW · 4.1 km
- S E Hazelton AHydro8.7 MW · 7.1 km
- Milner Butte LFGELandfill Gas3.9 MW · 7.2 km
Ownership & Operator
| Field | EIA | GEM | Wikidata |
|---|---|---|---|
| Operator | Idaho Power Co | Idaho Power | — |
| Owner(s) | Idaho Power Co | IDACORP | — |
| Status | Operating | operating | — |
Ownership Chain
About
Milner Dam is a rockfill dam near Burley in south central Idaho. It impounds the Snake River in a reservoir named Milner Lake. The dam spans the river across two islands, with three embankments.
Read more on WikipediaMilner Hydro is a 59.5 MW hydroelectric power plant located in Cassia County, Idaho. The plant, which began operating in 1992, utilizes conventional hydroelectric technology and consists of 3 generators. It is owned by IDACORP and operated by Idaho Power Co. The primary fuel source is water (WAT). Milner Hydro ranks as the 10th largest of 76 power plants in Idaho, and 275th out of 1464 nationally.
The plant's latest annual generation was 98,723 MWh, resulting in a capacity factor of 18.9%. Milner Hydro operates within the Idaho Power Company balancing authority and the Western Electricity Coordinating Council (WECC) NERC region. Financial data indicates an installed cost of $982.62 per kW. The plant has been mentioned in 3 news articles, covering regulatory, industry, and hazard-related topics.
Generated from EIA, GEM, and public data sources
Engineering & Generators
Grid Context
NERC Region
WECC
Balancing Authority
Idaho Power Company
Grid Voltage
138 kV
Regulatory Status
RE
Entity Type
Investor-Owned Utility
Sector
Electric Utility
Generation
1.7K MWh
Latest Month
98.7K MWh
Annual Generation
18.9%
Capacity Factor
Jan 2022 – Dec 2024
Financial DataBeta
Source: FERC Form 1HIGH
$999/kW
Installed Cost
$14.2/MWh
Operating Cost
Idaho Power Company
Reporting Utility
Cumulative Installed Cost
Per-Unit Cost Trends
Pricing & Market Data
Market Position
LMP Node
MLPR_1_TOT_GEN-APND
Pricing Hub
—
News & Articles (4)Beta
Regulatory·permitting
Idaho Power Company; Notice of Intent To File License Application, Filing of Pre-Application Document, and Approving Use of the Traditional Licensing Process
Federal Register (FERC)·3 days ago
General
Beyond the Landfill: Big Improvements for Southern Idaho’s Solid Waste System
With an overflow of waste, protecting public health and the environment begins with responsible waste management. In Southern Idaho, the...
USDA (.gov)·1 years ago
Industry·technology
Irrigation canal hydropower: A case study
There are voices within Idaho suggesting that hydroelectric generating plants on irrigation canal systems are focused more on generating...
Idaho (other)
Ag Proud·2 years ago
Hazards·flooding
Glacier shrinkage driving global changes in downstream systems
We synthesize current evidence of how glacier shrinkage will alter hydrological regimes, sediment transport, and biogeochemical and contaminant fluxes from...
PNAS·4 years ago
Last updated 2026-03-25
View all articles