South Padre Island and Port IsabelTransmission Improvements Project

AEP Texas representatives plan to prepare a power transmission system upgrade in the Port Isabel and South Padre Island area to better withstand adverse Gulf Coast weather through a $51 million rehabilitation program. The project includes a rebuild of about 12 miles of 138-kilovolt transmission line.

The project also reduces the likelihood and duration of power outages, while supporting economic growth and the region’s crucial tourism sector.

Crews plan to complete the project in 3 phases:

  • Phase 1: Upgrade the line between the Port Isabel and Causeway substations in Port Isabel.
  • Phase 2: Upgrade the line between the South Padre Island and Sunchase substations in South Padre Island.
  • Phase 3: Upgrade the line between the Causeway and Sunchase substations near the Queen Isabella Causeway.

Project Updates

Port Isabel Outage Notice: Weather permitting, AEP Texas will initiate an outage to portions of Port Isabel beginning Wednesday night around 10 p.m. The outage will last from five-to-eight hours and allow crews to safely complete work generally in the area between Port Road and the Port Isabel Side Channel, south of State Park Road 100 to Jean Lafitte.

Approximately 220 residents will be impacted. The work is necessary as AEP Texas crews work to complete the South Padre Island and Port Isabel Transmission Improvements Project. We apologize for the temporary disruption of service.

AEP Texas reminds customers to use surge protection device as a standard day-to-day practice. Customers with questions can contact the AEP Customer Operations Center at 1-866- 223-8508.

May 2021: Crews continue are working to complete the power line rebuild project along Padre Boulevard on South Padre Island. The project team expects to complete construction on South Padre Island later this summer.

October 2020: AEP Texas crews and contractors began Phase 2 of the project this month. Crews are currently working along Padre Boulevard on South Padre Island. They began work at the north end of the power line route and plan to work at night from 7 p.m. to 9 a.m. for the coming weeks.

Coates Field Service serves as AEP Texas' right-of-way representative on this project. Since last Fall, Coates right-of-way agents have been working with landowners to notify them of field activities. As the project moves forward, right-of-way agents are working with landowners along the line route to discuss necessary easements for the project.

AEP Texas representatives urge landowners to please contact the right-of-way agent listed on the letter they may receive to discuss questions regarding possible easements or other project-related questions. AEP Texas and Coates representatives want to be good neighbors and help to answer any concerns that customers may have.

AEP Texas hosted an informational come-and-go open house for area residents on Thursday, January 17, 2019, at the Port Isabel High School cafeteria in Port Isabel from 4 p.m. to 6:30 p.m. The project team also held a construction open house in October 2019.

Construction on Phase 1 of the transmission project concluded in Summer 2020, though additional work on distribution components may continue at select locations for several weeks.

Project Releases

Phase 3 Construction Release - October 14, 2021 (PDF)

Phase 2 Construction Release - September 17, 2020 (PDF)

Open House News Release - September 25, 2019 (PDF)

News Release - January 7, 2019 (PDF)

Project Releases

Project Map (PDF)


Project Timeline



Phase 1 Information

Typical Structure Height: 80 feet
Typical Distance Between Structures: 280 feet

Phase 2 Information

Typical Structure Height: 110 feet
Typical Distance Between Structures: 700 feet

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


Virtual Open House Project Fact Sheet Access Roads Field Activities

AEP Texas serves more than 900,000 electric consumers in the deregulated Texas marketplace.

Michael Harris

Project Outreach Specialist

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