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MASCHO SWITCH TO LAMESA SWITCH 345KV TRANSMISSION LINE PROJECT

To continue to provide safe and reliable electric service in this area, Oncor Electric Delivery Company LLC (Oncor) is proposing to construct a double-circuit 345 kV transmission line between Oncor’s existing Mascho Switch and Oncor’s existing Lamesa Switch. The existing Mascho Switch (formerly known as Clearfork Switch) is located approximately 2.0 miles southwest of the intersection of State Highway (SH) 115 and Farm-to-Market (FM) Road 181 in Andrews County, Texas. The existing Lamesa Switch is located approximately 1.2 miles northwest of the intersection of SH 349 and

United States Highway 87 in Dawson County, Texas. The Proposed Transmission Line Project is currently planned for completion in Spring 2030.

 

Voltage and Structure Type – The project includes a new 345 kV Double Circuit Transmission Line, approximately 60 to 80 miles in length. The structure will be constructed on self-supporting, steel lattice tower structures.

PROJECT MAPS

You can download or view a copy of the preliminary routing, as presented at the public participation meetings below.




INTERACTIVE MAP

Explore the preliminary transmission route links using our interactive map. This tool allows you to view route links, nearby parcels and other project details in an easy-to-navigate format.



Estimated Project Timeline

Application Filing – Anticipated in June 2026.

PUC Decision – Anticipated in December 2026.

Oncor Representatives can be contacted regarding the Mascho - Lamesa 345 kV Transmission Line Project at 682-888-8797 or transmissionprojects@oncor.com.

One public participation meeting was previously held for the project.

Public Participation Meeting materials handed out at the Public Meetings are available here. Public meeting materials reflect information that was accurate at the time of the meetings and may be updated when the application is filed.

  • Thursday

    February 5, 2026

     

    Lamar Forrest Park

    Community Center

    900 S. Houston Ave., 

    Lamesa, TX 79331

     

    5 - 7:00 PM

 

Public Meeting - Notice of the public meetings was published in the following newspapers on the specified dates.

Newspaper

County

Publish Date

Andrews County News

Andrews

1/27/2026

Seminole Sentinel

Gaines

1/27/2026

Lamesa Press Reporter

Dawson

1/27/2026

Stanton-Martin County Messenger

Martin

1/28/2026