Post Construction Storm Water Research: Informing TDOT MS4 Strategies by Quantifying Performance of Current Practices

The current Tennessee Department of Transportation (TDOT) MS4 permit requires TDOT to identify and catalog all post-construction Stormwater Control Measures (SCMs) in the Right of Way (ROW). However, it's not clear what highway drainage structures and vegetated landscaping (e.g. swales) really constitute a beneficial SCM and which are simply a stormwater conveyance. Most swales/ditches were designed to move water away from the ROW as quickly as possible and not allow it to potentially damage the structural integrity of the roadbed. This project was a data gathering study whereby initial quantification of swale performance as an SCM was achieved. This information is intended to support TDOT’s efforts to meet their current and future permanent stormwater management permit requirements by utilizing cost-effective and practical grassy swales as stormwater SCMs. This data will also provide a building block for the development of Standard Operating Procedures (SOPs) for proper design, installation, and maintenance of grassy swales as effective and approved permanent stormwater management SCM. Additional benefits of this project include gaining knowledge which can be used in the development of a methodology for field definition of ROW SCMs for mapping/cataloging purposes and how to determine if maintenance is required for these systems.

Language

  • English

Media Info

  • Media Type: Digital/other
  • Edition: Final Report
  • Features: Figures; References; Tables;
  • Pagination: 44p

Subject/Index Terms

Filing Info

  • Accession Number: 01690995
  • Record Type: Publication
  • Report/Paper Numbers: RES2016-21
  • Files: NTL, TRIS, ATRI, USDOT, STATEDOT
  • Created Date: Jan 10 2019 12:52PM