Freestone Energy Center
CalpineFreestone County
Freestone Energy Center is a two-block natural-gas combined-cycle plant near Fairfield in Freestone County, registered as EIA Plant ID 55226. EIA's May 2026 inventory lists six operating generators—four combustion turbines and two steam turbines—with 1,036 MW of nameplate capacity, 1,032 MW of net summer capability, and 1,095.2 MW of net winter capability. Calpine operates the facility through Freestone Power Generation LLC; Calpine is now a business unit of Constellation. The plant's ERCOT resources are organized as the FREC_CC1 and FREC_CC2 combined-cycle blocks.
Mapped infrastructure geometry associated with this asset.
Calpine is a Constellation business unit
Natural-gas combined cycle
RN102333853
EIA plant 55226 · Inventory for Sep 2026.
| Generator | Technology | Status | Power (MW) | Energy (MWh) |
|---|---|---|---|---|
| GT1 | Natural Gas Fired Combined Cycle | Operating | 166.7 | Unknown |
| GT2 | Natural Gas Fired Combined Cycle | Operating | 166.7 | Unknown |
| GT3 | Natural Gas Fired Combined Cycle | Operating | 166.7 | Unknown |
| GT4 | Natural Gas Fired Combined Cycle | Operating | 166.7 |
Similar plants ranked by technology, capacity, and distance.
Current generator records and technology attributes reported through EIA-860.
| Generator | Capacity | Technology | Operation | Status |
|---|---|---|---|---|
| GT1 | 166.7 MW 167 MW summer | Natural Gas Fired Combined Cycle CT | Jun 2002 | Operating |
| GT2 | 166.7 MW 167 MW summer | Natural Gas Fired Combined Cycle CT | Jun 2002 | Operating |
| GT3 | 166.7 MW 167 MW summer | Natural Gas Fired Combined Cycle CT | Jul 2002 | Operating |
| GT4 | 166.7 MW 167 MW summer | Natural Gas Fired Combined Cycle CT | Jul 2002 | Operating |
| ST3 | 184.6 MW | |||
Monthly EIA generation history and recent market-resource behavior where linked telemetry is available.
Deterministic links to ERCOT market resources, price records, outage disclosures, queue records, and nearby infrastructure. Candidate joins remain labeled until corroborated.
Source-backed project transactions, agreements, land records, permits, and environmental disclosures. Portfolio and adjacent-project facts remain explicitly scoped.
Parties, market resources, and identifiers tied to this asset, with owner, operator, developer, EPC, compliance provider, and interconnecting entity roles kept separate.
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Project milestones and public references behind the asset profile.
EIA reports June and July 2002 operating dates across the two combined-cycle blocks.
| Unknown |
| ST3 | Natural Gas Fired Combined Cycle | Operating | 184.6 | Unknown |
|---|
| ST6 | Natural Gas Fired Combined Cycle | Operating | 184.6 | Unknown |
|---|
Monthly generation is reported through EIA-923. Capacity factor uses the current EIA nameplate capacity and is shown only for complete calendar years.
4 ERCOT market resources · Combined-cycle gas
Capacity factor is average output vs. this plant's observed peak.
Observed ERCOT settlement prices at FREC_1_CCU over 365 days (2025-10-27 to 2026-10-26). This plant is also crosswalked to FREC_2_CCU, FREC_CC1, FREC_CC2; the point with the deepest price history is shown.
The TB2 figure is a price benchmark, not revenue: it values one perfect-foresight cycle per day between the 2 cheapest and 2 dearest hours of each day, gross of round-trip losses, and excludes ancillary services and any physical dispatch constraint. It describes what this node’s price shape was worth over the window — it is not this asset’s realized capture, and no dispatch is assumed or modelled.
Matched to the latest available ERCOT generation-interconnection queue record. Queue status and completion dates describe the queue record; operating status is verified separately against plant and market registrations.
| Largest reported plants | Capacity | State | |
|---|---|---|---|
| Freestone Energy CenterCurrent | 1,036 MW | TX | |
| Pin Oak Creek Energy Center, LLC | 444 MW | TX |
Portfolio membership follows the latest EIA-860 reporting entity. It does not imply ultimate ownership.
EIA-860 lists generator GT3, generator GT4, generator ST6 with this operating date.
Calpine signed a 380 MW power, grid-connectivity, and site-infrastructure agreement for a CyrusOne data center adjacent to Freestone, with an exclusive additional 380 MW second phase.
ERCOT SCED disclosure is delayed, so plant performance windows end at the latest disclosed interval.
Answered from the published record above. Questions whose inputs this profile does not carry are omitted rather than estimated.
Freestone Energy Center reports 1,036 MW natural gas of operating nameplate capacity. These technology ratings do not establish a common export limit. Source: EIA Sep 2026.
Freestone Energy Center is a Natural Gas Fired Combined Cycle facility in Freestone County, TX, participating in the ERCOT market.
Freestone Energy Center is in Freestone County, TX, inside the ERCOT balancing area.
Freestone Energy Center is operated by Freestone Power Generation LLC according to the EIA generator inventory. Reporting membership does not by itself establish ultimate ownership.
Freestone Energy Center reported 5,998.1 GWh over the twelve months to 2026-07. Figures are net generation as filed to EIA-923.
Freestone Energy Center settles at FREC.
By capacity, Freestone Energy Center ranks #90 of 540 operating plants of the same technology nationally. It ranks #12 of 68 in TX.
Plants within 25 km, nearest first, regardless of technology. Proximity is straight-line distance between mapped plant coordinates; it does not by itself establish a shared point of interconnection.
