Fall Creek/ETVID Drainageways Stabilization
LOCATION: Morristown, Tennessee
- Jason Brooks
- Tara Mallison
- Steve Drummer
- Jim Albert
CONSTRUCTION COST: $1 Million
- Field Services
- Project Planning
- Complex Permitting
- Extensive Modeling
- Alternatives Analysis
The East Tennessee Valley Industrial District (ETVID) is an industrial park located in the eastern part of Morristown, Tennessee. The 290 acre watershed is almost fully developed, resulting in large volumes and high rates of stormwater runoff. As a result, segments of the drainageways have experienced various degrees of erosion and the undesirable generation and transport of sediments. Due to this, the increased possibility of channel bank failures and erosion threatens segments of the Fall Creek sanitary sewer which is located close and parallel to much of the affected drainageways.
The City of Morristown was seeking a practical and economical approach for stabilizing the two major stormwater drainageways. Working closely with City staff, LDA prepared an engineering study to address the drainageway stabilization. The study consisted of field surveys and inspections, as well as the development of a SWMM hydrology and hydraulics computer model of the watershed and channels. The model was used to simulate stormwater flow characteristics at selected points in the drainageways under a variety of rainfall and runoff conditions.
Based on collected information, a short-list of alternatives was identified and further evaluated from the standpoint of construction cost and permitting issues. The final recommendations included maximizing the use of natural vegetative stabilization methods, improvement of problematic stormwater outfalls, channel improvements, and energy dissipation. LDA also provided permitting assistance and design. Included in the project were discussions with the Tennessee Department of Environment and Conservation (TDEC), the U.S. Army Corps of Engineers, and the Norfolk Southern Railroad.