Heartland - Yellowjacket 138 kV Transmission Line Project

    DISCLAIMER: The property information listed here is merely advisory. Any and all property lines listed on this website are approximate, subject to revision, and non-binding. While we use the best information available to us, the property information should only be used as an estimate and in no way considered a final determination of property lines/boundaries.

    AEP Texas and Electric Transmission Texas, LLC (ETT) will build a stronger, more reliable transmission grid in Menard and McCulloch counties by improving local electric infrastructure. These upgrades with improvements will benefit the region by strengthening the transmission system and improving its reliability. The estimated project investment is $38 million. The final path of the line and the associated miles has been determined by the Public Utility Commission of Texas (PUCT).


    Major components of the Heartland - Yellowjacket 138 kV Transmission Line Project include:

    • Approximately 38 miles of new 138-Kilovolt (kV) transmission line
    • Building a new substation - Heartland Substation in Brady
    • Upgrading one existing substation - Yellowjacket Substation in Menard


    The need for the project was demonstrated in August 2013 when the Brady area experienced a weather-related outage. This project will enhance the local electric grid to quicken restoration time and help provide reliable electric service to the surrounding area. Bolstering the infrastructure serving the Menard and Brady area will also support future economic growth and development.

    Landowner input on route study links to determine the proposed line route was gathered during and following open house events held in February 2016. AEP Texas and ETT filed a joint application to the Public Utilities Commission of Texas in August 2016. The application was approved in August 2017 granting a Certificate of Convenience and Necessity.


    Crews will begin construction in early 2019. The company expects to complete construction by early 2020.

    The proposed transmission line will extend from the new Heartland Substation in Brady southwest to the existing Yellowjacket Substation in Menard.

    Project Updates

    Landowners can expect to be contacted by a right-of-way agent to discuss the necessary easements for the safe construction, operation and maintenance of the proposed transmission line. Landowners will also receive additional information by mail.

    Vegetation clearing along the proposed line route is scheduled to start in January 2019 so construction can begin in February.

    Power line construction and substation upgrades are expected to be completed by the end of 2019. Right-of-way restoration work will continue into spring 2020.

    The PUCT approved the Heartland - Yellowjacket CCN application on August 31, 2017.

    Fact Sheet


    Typical Structures

    • Typical Height: 90-110 feet
    • Typical Distance between Structures: 600 feet
    • Typical Right-of-Way Width: 100 feet

    Structures (PDF)

    *Exact structure type, height and right-of-way requirements may vary.

    * The accompanying map depicts the project area. It should be noted that the map contained on this site is for information purposes only. AEP reserves the right to alter, change, or amend the map at any time without notice and AEP provides no warranty about the accuracy of content. Keep this in mind when reviewing this map. However, AEP will make all attempts to keep this map as accurate as possible. If you have any questions about the accuracy of the current map please Contact Us.