About STEC

Clif Lange, General Manager
Welcome to South Texas Electric Cooperative, Inc. (STEC), a pioneering Generation and Transmission (G&T) Cooperative dedicated to delivering reliable and affordable electric power to our diverse membership.
Established in 1944, STEC has been at the forefront of providing wholesale electric services to our 9-member distribution cooperatives for over 80 years.
STEC’s membership consists of the following distribution cooperatives that serve over 340,000 members in 47 South Texas counties.


STEC is governed by a Board of Directors consisting of representatives from each of our member cooperatives. This structure ensures that our operations are aligned with the needs and interests of our members.
Our headquarters are located at the Sam Rayburn Power Plant on the Guadalupe River just outside Nursery, TX. Power provided by STEC to its members is generated from a variety of energy sources, including wind, solar, lignite, natural gas, diesel fuel, and hydroelectric.
Transmission line and substation service facilities are also located in Pearsall, TX and Donna, TX with additional owned power plants located at Red Gate, TX and Pearsall, TX.
Primary generation sources, totaling 1,865.3 MW of capacity, are:
Owned & Operated
Sam Rayburn Power Plant (NG Combined Cycle, NG Simple Cycle Combustion Turbines, Diesel Reciprocating Engines)
Nursery, TX
Pearsall Power Plant (NG Reciprocating Engines, NG Steam)
Pearsall, TX
Red Gate Power Plant (NG Reciprocating Engines)
Edinburg, TX
Our History
On March 24, 1944, 7 cooperatives came together with a unified goal and common vision to collectively control their own destiny. This collaboration led to the formation of South Texas Electric Cooperative, Inc.
Over the decades, STEC has grown and evolved, continuously adapting to meet the changing energy needs of our members. From our humble beginnings, we have become a cornerstone of our communities, committed to electrifying and empowering South Texas through innovation and dedication.




Vision
STEC is a cutting-edge Generation and Transmission Cooperative and a leader in providing a diverse portfolio of affordable energy, a reliable power delivery system, and services customized to the needs of the members.
Mission
Our mission is to provide the infrastructure and services to deliver reliable and economical electric power to a diversified membership.
Core Values

Safety
We prioritize the safety of our employees, members, and communities.

Team Work
Collaboration and mutual support are the cornerstones of our success.

Integrity
We uphold the highest standards of honesty and transparency in all our operations.

Communications
Open and effective communication is key to our relationships with members and stakeholders.