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George W. Shannon Wetland Water Reuse Project, Tarrant Regional Water District

APAI teamed with Tarrant Regional Water District (TRWD) and partnered with the Texas Parks and Wildlife Department (TPWD) on a unique water reuse project using natural systems—the first of its kind in the country. Beginning operations in 2002, the Wetland Water Reuse project is a collaborative effort that augments TRWD’s water supply while enhancing the wildlife habitat.

This project was a major component of the water supply strategy included in the 2007 Texas Water Plan for Region C that was developed by the Texas Water Development Board (TWDB). To meet the water demands of a growing population, the Wetland Water Reuse project will ultimately augment the current yield of Richland-Chambers Reservoir by 30 percent and will provide an additional 63,000 acre-feet of water per year. Using constructed wetland systems to filter contaminants, the TRWD can divert effluent-dominated water from the Trinity River, provide enhanced treatment through natural treatment processes, and pump the polished water into the reservoir. 

Based on the success of an eight-year pilot-scale wetland study, TRWD contracted with APAI to design and oversee construction of a 243-acre field-scale wetland project in the summer of 2000 that was completed in December 2002. The purpose of the field-scale project was to verify the results of the pilot-scale project, test large-scale design criteria, and to ensure that no unforeseen problems arose due to the increased size of the system. The larger field-scale project was operated and monitored in a similar manner to the pilot-scale wetland system.

Based on favorable results achieved from the field-scale wetland project, TRWD authorized APAI to design another 190-acre wetland train in 2005. Construction of this train was completed in 2008, with planting of wetland vegetation completed in the spring of 2009. APAI responsibilities included construction management of the entire wetland site and the design of the remaining 1,300 acres of the wetland. Since this project is located within the Richland Creek Wildlife Management Area, APAI and TRWD worked with TPWD throughout the design process to make sure the project is mutually beneficial and will meet the goals of both entities.