Trinity River Authority’s (TRA) Central Regional Wastewater System (CRWS) plant began operations in 1959 as the first regional wastewater facility of its kind. The system is now one of the largest in Texas and has expanded to serve approximately 1.2 million people, providing treatment for 162million gallons a day (MGD). The treatment process removes 99% of conventional pollutants from raw wastewater and can handle daily maximum flows of 335 MGD and two-hour peak flow maximums of 405 MGD.
In 2017, MWH was awarded the contract to provide construction and startup and commissioning support for the Phase III-B Solids Management Improvement project for the CRWS. This project will replace the lime stabilization process with the Cambi® Thermal Hydrolysis Process (THP), an innovative solution to wastewater management that produces higher quality biosolids while capturing and treating odors more effectively, and maximizing biogas utilization to produce heat, steam, and energy. MWH has significant expertise in the design, construction, and commissioning and start-up of CambiTHP™ systems. Out of 50 CambiTHP™ systems currently installed worldwide, MWH provided services on more than twenty.
"It is a tremendous privilege to be selected by TRA for this important project. MWH is committed to providing superior service, and we look forward to partnering with TRA for a project that will meet the needs of the community for years to come."
The Bull Run Filtration Facility in Gresham, Oregon has earned the Envision Platinum Award, the highest honor from the Institute for Sustainable Infrastructure, recognizing its exceptional commitment to sustainability, environmental protection, and long‑term community benefit. As a major investment in the region’s drinking water system, the project will improve water quality, enhance reliability, and protect the Bull Run Watershed for future generations. The award highlights strong collaboration among the Portland Water Bureau, design teams, construction partners—including the MWH‑Kiewit joint venture—and community stakeholders, as well as leadership in climate resilience, resource efficiency, and workforce equity.
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During the recent Breckenridge conference, talent from across MWH came together to share groundbreaking innovations and insights in Quality, Engineering, Safety, and Technology. The level of leadership, creativity, and expertise on display was nothing short of inspiring.
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The MWH Breckenridge Conference featured 13 insightful presentations, recognizing standout contributions in engineering, innovation, and project leadership. Two teams were selected to join Obayashi’s training program in Tokyo.
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