United States Department of Transportation
i
In-Service Performance Evaluation of Erosion Prevention and Sediment Control (EPSC) Devices
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2018-10-31
[PDF-9.78 MB]
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Edition:Final Report October 1, 2015-November 30, 2018
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Abstract:Erosion Prevention and Sediment Control (EPSC) devices are widely used during construction projects by Department of Transportations (DOTs) nationally to prevent or reduce the movement of sediment that is carried into lakes, streams and rivers by storm water runoff from a site during construction and are required by state water quality and storm water regulations. Preventing erosion reduces the amount of sediment that leaves a construction site which carries nutrients and pollutants that degrade water resources and harm aquatic wildlife. Proper planning of construction site activities greatly reduces the impact of soil disturbance on nearby resources. Although erosion on construction sites often affects only a relatively small acreage of land in a watershed, it is a major source of sediment because the potential for erosion on highly disturbed land is commonly 100 times greater than on agricultural land. DOTs in every state have developed standard drawings per state water quality and storm water regulations and a drainage manual to provide guidance to roadway designers in order to develop erosion control plans to protect natural water resources during temporary roadway construction activities. It is evident that more information is needed to better asses the amounts of sediment lost during the temporary construction actives, including phasing activities observing field performance of EPSC devices, and improving design and implementation of EPSC devices based on past experiences and. This need has been elevated not only by design professionals who are directly involved in the development of erosion plans, but also operations professionals and other agencies and research institutions. The goals of this research were to investigate in-service performance of the effectiveness of current TDOT EPSC device installation practices in field. In addition, this research further evaluates the application guidance and quantity calculation methods currently provided for each EPSC device, estimates material quantities of installed devices based on initial installation, maintenance, and field performance. Available for use on highway construction project sites, TDOT Drainage Manual, Chapter 10 has 42 EPSC applications that include both flow and sediment control devices. The specific objectives of this research were to: 1) evaluate the applicability and performance of the current EPSC devices, 2) investigate how often EPSC devices are being modified during the construction under the SWPPP through on-site field inspections, and 3) determine if the changes are needed to roadway plans and specific EPSC applications in Chapter 10 of the TDOT Roadway Drainage Manual, and make any necessary recommendations.
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