Circle T Ranch Spillway and Regional Pond
CIRCLE T RANCH SPILLWAY AND REGIONAL POND
Town of Westlake and Hillwood
2,500-acre regional flood study
Our H&H group provided a 2,500-acre regional flood study model, hydraulic analysis, and infrastructure design plans for the 50-acre Circle T Ranch regional, on-channel detention facility. This facility will provide overall detention volume to accommodate both upstream and downstream developed stormwater flows within Circle T Ranch. Turner Lake was redesigned as part of the project, including a new 2,300-foot labyrinth weir and changes to the overall shape, volume, stormwater retention, and outfall conveyance of the lake. This unique spillway structure occupies a footprint of only 385 linear feet and limits the 100-year water surface elevation of the lake to 2 feet above the normal pool elevation, while safely passing the 75% PMF (probable maximum flood) design storm of 40,000 cfs. Design services included dredge design and dredge material storage/drying basins; shoreline planning, shaping, and impacts; and dam/weir design and downstream conveyance.
The project required coordination and approvals from the Town of Westlake, U.S. Army Corps of Engineers, and the State of Texas (TCEQ). It provides a regional stormwater management solution while creating attractive amenities and open space for the community and minimizing the fluctuation of flood elevations. The master-planned Circle T Ranch community is programmed for a wide spectrum of development including corporate campuses, retail/mixed-use, residential, and recreational opportunities.
- Regional stormwater management solution
- Dam/weir design
- Multi-agency coordination