Power plants planned and retiring in Idaho
Idaho plans 959 MW, 15% of its 6,567 MW in service (28th of 51). 400 MW is being built or tested; solar leads at 500 MW.
Idaho: planned against running
Idaho planned, by fuel
- Solar 500 MW (52%)
- Storage 100 MW (10%)
- Wind 359 MW (37%)
Idaho operating, by fuel
- Solar 827 MW (13%)
- Storage 659 MW (10%)
- Wind 1,128 MW (17%)
- Natural gas 1,143 MW (17%)
- Hydro 2,691 MW (41%)
- Oil 5 MW (0%)
- Other 113 MW (2%)
When Idaho capacity arrives and leaves
MW due online and retiring in Idaho, 2027 to 2028: 2 rows
| Year | Idaho planned MW | Idaho retiring MW |
|---|---|---|
| 2027 | 753 | No data |
| 2028 | 206 | No data |
2 rows from EIA-860M.
CSVIdaho projects dated after 2035 or without a year: 0 MW.
Where the Idaho projects are
Idaho: 3 counties shaded, darker for more planned MW.
Filter Idaho planned projects
Filter the 5 planned project lines in Idaho.
959 MW across 5 project lines, 15% of the 6,567 MW operating in Idaho.
- Blacks Creek Solar, Ada: 400 MW solar, online 2027
- Arco Wind and Solar Project, Bonneville: 206 MW wind, online 2028
- Arco Wind and Solar Project, Bonneville: 153 MW wind, online 2027
- Crimson Orchard Solar and BESS, Elmore: 100 MW storage, online 2027
- Crimson Orchard Solar and BESS, Elmore: 100 MW solar, online 2027
What the Idaho numbers say
Idaho runs 6,567 MW today. The planned list would add 959 MW (15%) while 0 MW (0%) of operating units carry a retirement date. Through 2035, Idaho has 959 MW due online and 0 MW due to retire there.
Idaho planned mix: 100% solar, storage and wind, 0% natural gas. Idaho stages: 400 MW under construction or in testing, 359 MW permits received, not started, 200 MW permits pending. Idaho retired 13 MW from 2021 to 2026 and has 1,992 MW on the canceled or postponed list.
Idaho capacity by fuel and status
| Idaho fuel | Operating MW | Planned MW | Retiring MW | Retired MW | Canceled in Idaho, MW |
|---|---|---|---|---|---|
| Solar | 827 | 500 | – | – | 461 |
| Storage | 659 | 100 | – | – | 200 |
| Wind | 1,128 | 359 | – | – | 395 |
| Natural gas | 1,143 | – | – | – | 192 |
| Nuclear | – | – | – | – | 721 |
| Hydro | 2,691 | – | – | – | 12 |
| Oil | 5 | – | – | – | – |
| Other | 113 | – | – | 13 | 10 |
| All fuels | 6,567 | 959 | – | 13 | 1,992 |
Idaho counties with the most planned capacity
| Idaho county | Planned, MW | Generators | Largest fuel |
|---|---|---|---|
| Ada County | 400 | 1 | Solar |
| Bonneville County | 359 | 2 | Wind |
| Elmore County | 200 | 2 | Storage |
Largest planned projects in Idaho
| Idaho plant | County | Fuel | Stage | Due | MW |
|---|---|---|---|---|---|
| Blacks Creek Solar | Ada | Solar | Under construction or in testing | 2027 | 400 |
| Arco Wind and Solar Project | Bonneville | Wind | Permits received, not started | 2028 | 206 |
| Arco Wind and Solar Project | Bonneville | Wind | Permits received, not started | 2027 | 153 |
| Crimson Orchard Solar and BESS | Elmore | Storage | Permits pending | 2027 | 100 |
| Crimson Orchard Solar and BESS | Elmore | Solar | Permits pending | 2027 | 100 |
Idaho against its neighbors
Idaho: planned MW equal 15% of operating. Bordering states: Montana plans 16% of what it runs (1 points above Idaho); Nevada plans 37% of what it runs (23 points above Idaho); Oregon plans 42% of what it runs (27 points above Idaho); Utah plans 32% of what it runs (18 points above Idaho); Washington plans 12% of what it runs (3 points below Idaho); Wyoming plans 60% of what it runs (45 points above Idaho).
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Sources
EIA-860M inventory for Idaho: 275 operating generators, 5 planned lines, edition August 2026, retrieved 5 Oct 2026. Sources for {e(sn)}.
More on Idaho
Questions
Idaho: how much new power plant capacity is planned?
959 MW, 15% of the 6,567 MW Idaho runs. 400 MW is being built or tested in Idaho.
Idaho: what kind of power plants are planned?
Solar leads Idaho with 500 of 959 planned MW.
Idaho: which power plants are retiring?
0 MW of Idaho units have a retirement date.
Will Idaho get all the planned plants?
Not necessarily. Idaho has 1,992 MW canceled or postponed, and 13 MW (other the largest group) retired from 2021 to 2026.