# Freestone Energy Center

ERCOT asset profile · https://askthegrid.com/assets/facilities/freestone-energy-center

Calpine · Freestone County · ERCOT

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.

## Profile

- **Plant configuration:** Two combined-cycle blocks with four combustion turbines and two steam turbines.
- **ERCOT resources:** FREC_CC1 and FREC_CC2; six underlying generator units are registered with EIA.
- **Environmental controls:** Dry low-NOx combustors and continuous NOx emissions monitoring under TCEQ Title V Permit O2156.
- **Adjacent development:** A 380 MW CyrusOne data center is planned next to the plant, with an exclusive option for a second 380 MW phase.

## Metrics

- **Net summer capability:** 1,032 MW — EIA May 2026
- **Nameplate capacity:** 1,036 MW — Six operating generators
- **Net winter capability:** 1,095.2 MW — EIA May 2026
- **12-month generation:** 6.17 TWh — May 2025–Apr 2026 · EIA Form 923
- **Capacity factor:** 68.27% — Against net summer capability
- **Registry anchor:** Plant 55226 — Freestone Power Generation LLC · ERCOT

## Facts

- **Owner / operator:** Calpine / Freestone Power Generation LLC — Calpine is a Constellation business unit · confidence: high
- **ERCOT blocks:** FREC_CC1 · FREC_CC2 — Natural-gas combined cycle · confidence: high
- **Operating permit:** TCEQ O2156 — RN102333853 · confidence: high

## Sources

- [EIA May 2026 generator inventory](https://www.eia.gov/electricity/data/eia860m/) — U.S. Energy Information Administration · regulatory — Current generator count, status, capacity, technology, and operating dates.
- [ERCOT stand-alone resource list](https://www.ercot.com/files/docs/2025/09/02/Stand-Alone-Generation-Resources-as-of-09.01.25.pdf) — ERCOT · regulatory — Current Freestone generator resources and settlement point.
- [TCEQ Permit O2156](https://www.tceq.texas.gov/assets/public/permitting/air/publicnotice/34370sob.pdf) — Texas Commission on Environmental Quality · regulatory — Exact regulated entity, operating permit, configuration, and emissions controls.

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Canonical page: https://askthegrid.com/assets/facilities/freestone-energy-center
Website: [Calpine](https://calpine.com/)
Profile published: 2026-07-17T08:05:29.149Z
Source: Ask the Grid — https://askthegrid.com/