- Clean firm
- Wind & solar
- In development
- Operating
- 10 · 100 · 1,000 MW
Map
- Clean firm
- Wind & solar
- In development
- Operating
Ormesa I: location and 1 exact-grade project within 15 mi. Basemap: Protomaps, © OpenStreetMap contributors, ODbL.
Ormesa I
Power plant · Geothermal
Key facts
Power plant · Geothermalran 40% of 2025 Operating- Capacity
- Capacity: sourceEIA-860M · Open licenseMW
- Commissioned
- 2003
- Net generation, 2025
- 66,412 MWh
- Grid
- 92 kV to Imperial Irrigation District (IID)
- Location
- Imperial County, California
- Operated by
- Ormat Nevada IncSourceEIA-860M Preliminary Monthly Electric Generator Inventory
Output
Details
Who’s behind it
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- Technology
- Geothermal source: “Geothermal”
- Age
- 23 years since 2003
All 4 attributes from EIA-860M Preliminary Monthly Electric Generator Inventory
| Attribute | Value |
|---|---|
| Fuel burned (MMBtu), 2025 | 226,597 |
| Capacity factor, 2025 | 0.399 |
| Net generation (MWh), 2025 | 66,412 |
| Balancing authority code | IID |
Retirement
EIA-860M September 2026StatusSome generators have retired; the rest of the plant is still in service. As of EIA-860M for September 2026.- Capacity retired
- 43.2 MW
- Generators retired
- 27
- Capacity still in service
- 19 MW
| Generator | Technology | Nameplate | State | Date |
|---|---|---|---|---|
| OE1 | Geothermal | 1.2 MW | Retired | September 2003 |
| OE10 | Geothermal | 1.2 MW | Retired | September 2003 |
| OE11 | Geothermal | 1.2 MW | Retired | September 2003 |
| OE12 | Geothermal | 1.2 MW | Retired | September 2003 |
| OE13 | Geothermal | 1.2 MW | Retired | September 2003 |
| OE14 | Geothermal | 1.2 MW | Retired | September 2003 |
| OE15 | Geothermal | 1.2 MW | Retired | September 2003 |
| OE16 | Geothermal | 1.2 MW | Retired | September 2003 |
| OE2 | Geothermal | 1.2 MW | Retired | September 2003 |
| OE21 | Geothermal | 1.2 MW | Retired | September 2003 |
| OE22 | Geothermal | 1.2 MW | Retired | September 2003 |
| OE24 | Geothermal | 1.2 MW | Retired | September 2003 |
| OE25 | Geothermal | 1.2 MW | Retired | September 2003 |
| OE27 | Geothermal | 1.2 MW | Retired | September 2003 |
| OE28 | Geothermal | 1.2 MW | Retired | September 2003 |
| OE3 | Geothermal | 1.2 MW | Retired | September 2003 |
| OE4 | Geothermal | 1.2 MW | Retired | September 2003 |
| OE5 | Geothermal | 1.2 MW | Retired | September 2003 |
| OE6 | Geothermal | 1.2 MW | Retired | September 2003 |
| OE7 | Geothermal | 1.2 MW | Retired | September 2003 |
| OE8 | Geothermal | 1.2 MW | Retired | September 2003 |
| OE9 | Geothermal | 1.2 MW | Retired | September 2003 |
| OE23 | Geothermal | 1.2 MW | Retired | July 2008 |
| OE26 | Geothermal | 1.2 MW | Retired | April 2012 |
| OE31 | Geothermal | 1.2 MW | Retired | June 2018 |
| OE32 | Geothermal | 1.2 MW | Retired | June 2018 |
| ITLU2 | Geothermal | 12 MW | Retired | January 2025 |
Grid
EIA-860 2025Grid fieldsAs the plant reported them to EIA-860 for 2025 (Schedule 2).- Grid voltage at the plant
- 92 kV
- Transmission or distribution system owner
- Imperial Irrigation District
- Balancing authority
- Imperial Irrigation District
- NERC region
- WECC
Transmission lines within 15 mi (2)
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 ITLU2 scheduled to retire, 12 MW · EIA-860M
- Stated Units OE31, OE32 scheduled to retire, 2.4 MW · EIA-860M
- Stated Unit OE26 scheduled to retire, 1.2 MW · EIA-860M
- Stated Unit OE23 scheduled to retire, 1.2 MW · EIA-860M
- Stated Units OE1, OE10, OE11, OE12, OE13, OE14, OE15, OE16, OE2, OE21, OE22, OE24, OE25, OE27, OE28, OE3, OE4, OE5, OE6, OE7, OE8, OE9 scheduled to retire, 26.4 MW · EIA-860M
- In service · EIA-860M
Sources
4 sourcesSources EIA-860M · LBNL · EIA · EIA-860M Preliminary Monthly Electric Generator Inventory
Sources
- EIA-860M
- LBNLYin, Nait Belaid & Heleno (2026), Lawrence Berkeley National Laboratory, OEDI, CC BY 4.0: A Harmonized Geospatial Dataset of U.S. Transmission Lines: Linking FERC Form 1 and HIFLD, 1994-2024. Modified by Inframation: HIFLD-side fields only, names re-cased, coordinates rounded.
- EIASource: U.S. Energy Information Administration, Electricity bulk data (Form EIA-923 monthly plant series)
- EIA-860M Preliminary Monthly Electric Generator Inventory
Around this plant
Nearby
within 15 mi| Project | Kind | Away | MW |
|---|---|---|---|
| Imperial Sun Solar Filed | Solar + storage | 9.3 mi | 200 |
Sources EIA-860M