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About Us

These distribution cooperatives serve over 290,000 members in forty-two South Texas counties. Governance is provided by a Board of Directors consisting of representatives from each of STEC's members.
STEC's headquarters facility is located at the Sam Rayburn Power Plant Complex on the Guadalupe River just outside Nursery, Texas. Transmission line and substation service facilities are also located in Pearsall, Texas and Donna, Texas.
Power provided by STEC to its members is generated from a variety of energy sources, including wind, lignite, natural gas (NG), diesel fuel, and hydroelectric.
Primary generation sources, totaling 2030 MW of capacity, are:
Owned and Operated
  • Sam Rayburn Power Plant (Dual-fuel Combined Cycle, and Diesel Reciprocating Engines) - Nursery, TX
  • Pearsall Power Plant (NG Reciprocating Engines, NG Steam) - Pearsall, TX
  • Red Gate Power Plant (NG Reciprocating Engines) - Edinburg, TX

Long-term Purchase Power Agreements

  • San Miguel Power Plant/ San Miguel Electric Cooperative, Inc. (Lignite) - Christine, TX
  • Magic Valley Generating Station/ Calpine (NG Combined Cycle) - Edinburg, TX
  • Amistad Dam Power Plant/ WAPA/IBWC (Hydroelectric) - Del Rio, TX
  • Falcon Dam Power Plant/ WAPA/IBWC (Hydroelectric) - Falcon, TX
  • Peñascal Wind Power Project/ AVANGRID (Wind) - Sarita, TX
  • Javelina II Wind Power Project/ NextEra Energy Resources (Wind) - Webb County, TX
  • Pearsall and Red Gate Solar/ South Texas Solar Power, LLC (STEC wholly owned subsidiary) (Solar PV) – Frio and Hidalgo Counties, TX
  • Sky Global One/ Sky Global Partners, LLC (NG Reciprocating Engines) – Colorado County, TX
  • Lamesa Solar/ City of Garland (Solar PV) – Dawson County, TX
  • Salt Fork Wind/ City of Garland (Wind) – Gray and Donley Counties, TX
  • Various Bulk PPAs with EDF Trading North America, LLC, Garland Power & Light, NextEra Energy Marketing, LLC, and AEP Energy Partners, Inc.
Delivery of electric power is made to the Member Cooperatives through a system that includes more than 200 electrical substations and approximately 2,200 miles of overhead electric transmission lines that are energized at 345, 138, and 69 kV (thousand volts).



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