TRA Completes a Segment of the Soap Creek Interceptor, Expanding Wastewater Service for Ellis County Communities
ARLINGTON, Texas (September 21, 2026) — Trinity River Authority of Texas completed a segment of the Soap Creek Interceptor. As of Monday, Sept. 21, 2026, a downstream portion has been activated, allowing wastewater flow from the Goodland Development to now move through this portion of the interceptor.
TRA issued the notice to proceed, or begin construction, on this segment of pipe in early 2024. With the addition of new homes and developments in the area, TRA recognized the need to make completion of this segment of the project a priority for the county, community and residents who would benefit from its completion.
“Working together with the City of Grand Prairie and Ellis County Fresh Water Supply District No. 1, TRA has provided access to the necessary wastewater services to support new developments and homes in the area, but we recognized that the current process was a burden on the community. We coordinated our efforts with contractors and others to make completion of this project a priority and provide relief to the community and the county. It is our goal to ensure our services are available and in working order for all the residents who rely, or will rely, on our wastewater treatment facilities,” said Matthew Jalbert, Executive Manager, TRA Northern Region.
The Soap Creek Interceptor is the newest section of the TRA Mountain Creek Regional Wastewater System (MCRWS), which collects and treats wastewater for the cities of Grand Prairie, Mansfield, Midlothian and Venus.
“Wastewater treatment is engineered to be invisible, which makes it easy to take for granted. This project, however, demonstrates and celebrates that behind that invisibility is a team working every day to protect public health and provide excellent support and service for the communities we serve,” added Jalbert. “This project is a testament to the dedication and efforts of TRA staff to uphold that commitment to excellence.”
The remaining work on the Soap Creek Interceptor project is expected to be completed in late 2026, when the remaining flow transfers to the Soap Creek Interceptor are made. This effort will support TRA’s MCRWS customer cities and the ongoing growth in this area of Ellis County.
About Mountain Creek Regional Wastewater System (MCRWS)
The Mountain Creek Regional Wastewater System provides regional wastewater movement and treatment services for all or portions of four cities. The system currently includes a 4.5 MGD treatment plant with peak flow storage capabilities of 7.0 million gallons located in the city of Midlothian, as well as a lift station, force mains, gravity wastewater pipelines, and metering facilities. The treatment plant is additionally nearing completion of a 7.0 MGD expansion. The MCRWS has earned the National Association of Clean Water Agencies' Peak Performance gold and silver awards for compliance with its National Pollution Discharge Elimination System permit.
About the Trinity River Authority of Texas
The Trinity River Authority is a conservation and reclamation district providing water and wastewater treatment, along with recreation and reservoir facilities, within the nearly 18,000-square-mile Trinity River basin. TRA maintains a master plan for basin-wide development and engages in initiatives for flood risk reduction, pollution prevention, and water quality monitoring. TRA also serves as a conduit for tax-exempt financing for municipal projects and as a local sponsor for federal water projects. Each TRA operating project is an independent financial entity, and TRA receives no tax revenues or appropriation. For more information, visit www.trinityra.org.
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