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Stewart Road 345-kV Transmission Line Project

On February 16, 2018, Electric Transmission Texas, LLC (ETT) submitted a Certificate of Convenience and Necessity (CCN) to the Public Utility Commission of Texas (PUCT) for the construction of up 5 to 9 miles of new 345-kilovolt (kV) double-circuit transmission line in Hidalgo County, Texas. The Stewart Road 345-kV Transmission Line Project is needed to address electric reliability issues in the Lower Rio Grande Valley (LRGV). ETT will own and construct the transmission line. The project would require AEP Texas to expand its Stewart Road Substation to accommodate the new facilities.

The Stewart Road 345-kV Transmission Line Project will improve the local electric grid and help to provide reliable electric service to the surrounding area while also addressing continued growth in the LRGV.

Click here to view a project map and for additional information.

ETT acquires, constructs, owns and operates transmission facilities within the Electric Reliability Council of Texas (ERCOT) area. 

AEP, headquartered in Columbus, Ohio, is one of the largest electric utilities in the U.S., delivering electricity to more than 5 million consumers in 11 states. AEP has extensive experience building extra-high-voltage 765-kV transmission lines and owns the nation’s largest electricity transmission system, an over 40,000-mile network that includes 2,100 miles of 765-kV transmission lines, more than all other U.S. transmission systems combined.

Berkshire Hathaway Energy owns a portfolio of locally managed businesses that share a vision for the energy future, make sustainable investments to achieve that vision, and had $70 billion of assets as of Dec. 31, 2013. These businesses deliver safe, reliable service each day to more than 8.4 million customers and end-users around the world and consistently rank high among energy companies in customer satisfaction. Berkshire Hathaway Energy is headquartered in Des Moines, Iowa, U.S.A. Learn more and see a complete list of our businesses at

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