- Combustion
- Wind & solar
- Under construction
- Retired
- 10 · 100 · 1,000 MW
Map
- Combustion
- Wind & solar
- Under construction
- Retired
Coolwater: location and 3 exact-grade projects within 25 km. Basemap: Protomaps, © OpenStreetMap contributors, ODbL.
Coolwater
Power plant · Gas, combined cycle
Key facts
Power plant · Gas, combined cycleran 4% of 2014 Retired- Capacity
- Capacity: sourceEIA-860M · Open licenseMW
- Commissioned
- 1961
- Net generation, 2014
- 248,282 MWh
- Location
- San Bernardino County, California
- Operated by
- GenOn California South, LP
Output
- Gas
Details
Who’s behind it
- Owner
- NRG Energy, Inc
Interested in this project?
Set an alert Book a call Join the beta
Our team gets you what you need.
Beta: private project space · data room · readiness check
- Technology
- Gas, combined cycle source: “Natural Gas Fired Combined Cycle”
- Age
- 65 years since 1961
All 2 attributes from EIA-860M Preliminary Monthly Electric Generator Inventory
| Attribute | Value |
|---|---|
| EPA greenhouse gas reporting (GHGRP) |
|
| Balancing authority code | CISO |
Retirement
EIA-860M September 2026StatusEvery generator EIA lists at this plant has retired. As of EIA-860M for September 2026.- Retired
- December 2014
- Capacity retired
- 727.3 MW
- Generators retired
- 8
| Generator | Technology | Nameplate | State | Date |
|---|---|---|---|---|
| 1 | Natural Gas Steam Turbine | 65.3 MW | Retired | December 2014 |
| 2 | Natural Gas Steam Turbine | 82 MW | Retired | December 2014 |
| 30 | Natural Gas Fired Combined Cycle | 120 MW | Retired | December 2014 |
| 31 | Natural Gas Fired Combined Cycle | 85 MW | Retired | December 2014 |
| 32 | Natural Gas Fired Combined Cycle | 85 MW | Retired | December 2014 |
| 40 | Natural Gas Fired Combined Cycle | 120 MW | Retired | December 2014 |
| 41 | Natural Gas Fired Combined Cycle | 85 MW | Retired | December 2014 |
| 42 | Natural Gas Fired Combined Cycle | 85 MW | Retired | December 2014 |
By technology
| Technology | Retired | Scheduled to retire |
|---|---|---|
| Natural Gas Fired Combined Cycle | 580 MW | |
| Natural Gas Steam Turbine | 147.3 MW |
Grid
EIA-860Grid fieldsAs the plant reported them to EIA-860 (Schedule 2).- Balancing authority
- CISO
Transmission lines within 25 km (3)
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.
Ownership
2 companies2| Company | Role | Share | As of | Source |
|---|---|---|---|---|
| GenOn California South, LP | Operator | EIA-860M | ||
| NRG Energy, Inc | Owner | 100.0% | 31 Dec 2023 | EPA GHGRP |
Timeline
- Stated Units 1, 2, 30, 31, 32, 40, 41, 42 scheduled to retire, 727.3 MW · EIA-860M
- In service · EIA-860M
Sources
5 sourcesSources EIA-860M · LBNL · EIA · EIA-860M Preliminary Monthly Electric Generator Inventory · EPA Greenhouse Gas Reporting Program — facility register with parent-company shares (Envirofacts pub_dim_facility; FLIGHT)
Sources
- EIA-860M Preliminary Monthly Electric Generator Inventory
- LBNL — A Harmonized Geospatial Dataset of U.S. Transmission Lines: Linking FERC Form 1 and HIFLD, 1994-2024 (OEDI submission 8742)Yin, 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.
- EIA Open Data bulk file — Electricity (ELEC.zip; monthly plant net generation and fuel consumption since 2001)Source: U.S. Energy Information Administration, Electricity bulk data (Form EIA-923 monthly plant series)
- EIA-860M Preliminary Monthly Electric Generator Inventory
- EPA Greenhouse Gas Reporting Program — facility register with parent-company shares (Envirofacts pub_dim_facility; FLIGHT)
Around this plant
Nearby
within 25 km| Project | Kind | Away | MW |
|---|---|---|---|
| Solar Photovoltaic Project #40 Postponed | Solar | 1.3 km | 10 |
| Solar Photovoltaic Project #41 Postponed | Solar | 1.3 km | 10 |
| Minneola Solar Under construction | Solar | 7.8 km | 3 |