Step 5: Route power to where it’s needed
As Southeast Texas grows, so does the need for a more robust transmission network. With significant population increases and rapid business development, the demand for electricity has never been higher. We are upgrading current transmission lines and building new ones to ensure reliable power can reach fast-growing communities. Quick and efficient construction of these transmission lines is essential to keep pace with this growth and maintain a safe and reliable electric grid. By acting swiftly, we are not only preventing potential outages but also laying the foundation for continued economic expansion and future energy needs.
While most Texans rely on the Electric Reliability Council of Texas grid, Entergy Texas operates under the Midcontinent Independent System Operator grid. Our membership in MISO brings cost savings directly to our customers by sharing resources among a large pool of member utilities that stretches across MISO’s vast footprint from Canada to the Gulf of Mexico. By sharing in that large pool, among other customer benefits, we can continue maintaining reliability with less power generation capacity than if we were operating on our own, creating efficiencies and lower costs in energy delivery. Between 2014 and 2022, Entergy Texas customers saved a total of $475 million from the company’s participation in MISO.
Active/upcoming Entergy Texas transmission projects
All routes and route segments included in these projects are available for selection and approval by the Public Utility Commission of Texas.
Project | Description | Date of regulatory filing | Expected PUCT decision date |
SETEX Area Reliability Project |
A new single-circuit 500-kilovolt transmission line approximately 131 to 160 miles in length (depending on the route ultimately approved by the PUCT) in Jasper, Montgomery, Newton, Polk, San Jacinto, Trinity, Tyler and Walker counties. The new transmission line will connect the proposed Babel 500-kV Switching Station to the proposed Running Bear Substation. | February 2025 | August 2025 |
Legend to Sandling | A new single-circuit 230 kilovolt transmission line approximately 8.8 to 9.9 miles in length (depending on the route ultimately approved by the PUCT). The line will connect the existing Legend Substation to the currently under-construction Sandling Substation. | April 2025 | October 2025 |
Cypress to Legend | A new single-circuit 500 kilovolt transmission line approximately 35 miles in length in Hardin and Jefferson counties. The new transmission line will be routed from the existing Entergy Texas Cypress Substation in Hardin County and extend to the new Legend 500 kV Substation in Jefferson County. The final route will be determined by the Public Utility Commission of Texas. | Second quarter 2025 | Fourth quarter 2025 |
Southline to Jacinto | A new 138-kilovolt transmission line in Liberty and San Jacinto counties. If approved, the project will prevent contingent low-voltage and thermal overloads as well as benefit load-serving capability driven by commercial and residential growth in the area. The proposed 6- to 10-mile transmission line would follow a yet-to-be- selected corridor from the existing Southline Substation (about two miles northwest of U.S. Highway 59 and State Highway 105 in Liberty County) to the existing Jacinto Substation (about two miles north-northeast of the intersection of U.S. 59 and Farm-to-Market Road 2025, also in Liberty County). | Third quarter 2025 | First quarter 2026 |