# Guadalupe Generating Station

ERCOT asset profile · https://askthegrid.com/assets/facilities/guadalupe-generating-station

Calpine / Constellation · Guadalupe County · ERCOT

Guadalupe Generating Station is a two-block natural-gas combined-cycle plant near Marion in Guadalupe County, Texas. EIA's May 2026 inventory lists four combustion turbines and two steam turbines with 1,088.2 MW of nameplate capacity, 1,005 MW of net summer capability, and 1,042 MW of net winter capability. Guadalupe Power Partners, LP owns and operates the station, which participates in ERCOT through combined-cycle resources GUADG_CC1 and GUADG_CC2. Calpine acquired the plant for approximately $625 million in February 2014; Calpine became part of Constellation in January 2026.

## Profile

- **Plant configuration:** Two 2×1 combined-cycle blocks: four GE Frame 7FA combustion turbines, four Aalborg heat-recovery steam generators, and two GE steam turbines.
- **ERCOT registration:** Combined-cycle resources GUADG_CC1 and GUADG_CC2; the historical mapping also identifies component units GUADG_GAS1–4 and GUADG_STM5–6.
- **Operating profile:** Constellation classifies the six-unit plant as intermediate-dispatch generation; EIA reports a 59.57% capacity factor for the latest twelve-month window.

## Metrics

- **Net summer capacity:** 1,005 MW — EIA May 2026
- **Nameplate capacity:** 1,088.2 MW — Four combustion turbines and two steam turbines
- **12-month generation:** 5.24 TWh — May 2025–Apr 2026 · EIA Form 923
- **Capacity factor:** 59.57% — Against EIA net summer capability
- **ERCOT resources:** 2 resources — GUADG_CC1 · GUADG_CC2
- **Registry anchor:** Plant 55153 — Guadalupe Power Partners, LP · ERCOT

## Facts

- **Owner / operator:** Guadalupe Power Partners, LP — Calpine / Constellation corporate chain · confidence: high
- **Configuration:** Two 2×1 blocks — Four CTs · four HRSGs · two STs · confidence: high
- **2014 acquisition:** $625 million — Calpine purchase from MinnTex Power Holdings · confidence: high
- **TCEQ entity:** RN100225820 — Federal Operating Permit O2071 · confidence: high

## Sources

- [EIA May 2026 generator inventory](https://www.eia.gov/electricity/data/eia860m/) — U.S. Energy Information Administration · regulatory — Current six-unit configuration, capacities, operating dates, operator, and ERCOT balancing authority.
- [Calpine acquisition filing](https://www.sec.gov/Archives/edgar/data/916457/000091645714000016/R8.htm) — U.S. Securities and Exchange Commission · regulatory — February 2014 acquisition, $625 million consideration, 110-acre site, block configuration, and equipment.
- [Fluor Guadalupe project](https://www.fluor.com/projects/guadalupe-gas-fueled-electric-generation-epc) — Fluor · official — Turnkey EPC scope and the four-GE-7FA, four-Aalborg-HRSG, two-GE-steam-turbine configuration.

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Canonical page: https://askthegrid.com/assets/facilities/guadalupe-generating-station
Website: [Calpine](https://calpine.com/)
Profile published: 2026-07-17T08:23:25.111Z
Source: Ask the Grid — https://askthegrid.com/