The Trinity River Authority’s (TRA) Central Regional Wastewater System (CRWS) provides wastewater treatment for over one million residents across West Dallas. After years of system expansions, TRA sought a more efficient, higher‑capacity grit removal process to improve performance and reduce odor emissions. STV designed an innovative conversion of the plant’s existing aerated grit basins into vortex‑style grit removal basins – significantly increasing processing capacity while maximizing the value of existing infrastructure.
What challenges did STV address?
CRWS required a major performance upgrade while operating within a congested footprint and maintaining continuous wastewater treatment operations. The team needed to improve grit removal, manage odor, enhance operational reliability and build new structures in tight proximity to existing facilities. Integrating new basins and equipment without affecting plant functionality was central to the project.
What solutions did STV deliver?
STV engineered a vortex grit removal system that increased capacity to 350 MGD, enabling more effective removal of solids from incoming flows. Pier foundations were designed to support new structures within limited space, and STV added a new grit separation facility adjacent to the existing basins. The upgraded system includes six new grit pumps, dewatering units and modern electrical equipment. Following this successful phase, STV advanced additional renovation designs to expand grit capacity to 630 MGD.
How does this project benefit the region?
The upgraded grit removal system enhances water quality, streamlines plant operations and reduces odor emissions for surrounding communities. Increased treatment reliability supports long‑term population growth across West Dallas, ensuring more resilient and efficient wastewater service for more than one million residents.
Key Stats and Accolades
- 350 MGD grit processing capacity (Phase 1)
- 6 new grit pumps and modern dewatering systems
- Serves 1 million West Dallas residents
- Winner of ACEC Texas and ACEC National Engineering Excellence Awards
