Rancho Seco
Power plant · Nuclear
Key facts
Power plant · Nuclear Retired- Capacity
- Capacity: sourceEIA-860M · Open licenseMW
- Commissioned
- 1975
- Location
- Sacramento County, California
- Operated by
- Sacramento Municipal Util DistSourceEIA-860M Preliminary Monthly Electric Generator Inventory
Details
Who’s behind it
No companies named in filings yet.
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- Technology
- Nuclear source: “Nuclear”
- Age
- 51 years since 1975
Retirement
EIA-860M August 2026StatusEvery generator EIA lists at this plant has retired. As of EIA-860M for August 2026.- Retired
- September 1990
- Capacity retired
- 963 MW
- Generators retired
- 1
| Generator | Technology | Nameplate | State | Date |
|---|---|---|---|---|
| 1 | Nuclear | 963 MW | Retired | September 1990 |
Grid
Not in EIA-860Grid fieldsEIA-860 states no grid voltage or transmission owner for this plant: its annual file lists plants with a generator in the report year, so a plant that retired earlier is not in it.Can the connection be reused?
A plant that retires usually leaves its substation, transmission connection and interconnection agreement behind, and those may be reusable by a new project at the same site. FERC Order No. 845 lets an interconnection customer use surplus interconnection service at an existing site, and some transmission providers' tariffs let a replacement resource take over a retiring unit's interconnection service, usually within a set time after the retirement. Whether any such right still exists here, who holds it and on what terms depends on the owner, the transmission provider and timing; this page does not establish any of that.
Timeline
- Stated Unit 1 scheduled to retire, 963 MW · EIA-860M
- In service · EIA-860M