Evaluating the Particle Size Distribution of Ohio's Stormwater Runoff

With the creation of the United States Environmental Protection Agency's (U.S. EPA) Clean Water Act (CWA), our surface waters are more protected. Implementation of section 402 of the CWA requires the Ohio Department of Transportation (ODOT) to obtain coverage under a National Pollutant Discharge Elimination System (NPDES) general permit to discharge stormwater runoff from ODOT's owner/operated storm sewer system. To comply with one aspect of this per¬mit, ODOT is required to address Post-construction Water Quality Best Management Practices (BMPs) that require the removal of 80% of particulate matter (PM) measured as total suspended solids (TSS) from stormwater runoff. Although, the permit does not specify the particle size distribution (PSD) to use when testing the separation (sequestration) efficiency of a BMP, understanding PSD is an important factor when assessing impacts to receiving streams. The research goals and objectives are to quantify the PSD generated on the roadway system and transported in roadway stormwater runoff. The research will provide data specific to PM associated with Ohio roadways that will allow ODOT to better assess and determine new or revisions to the current post-construction water quality BMPs in ODOT's Location and Design Manual Volume 2, which in turn will allow ODOT to better demonstrate removal efficiencies specifically associated with Ohio roadway PM; the ultimate goal being able to demonstrate compliance with OEPA's CGP requirements.


    • English


    • Status: Completed
    • Funding: $431623
    • Contract Numbers:




    • Sponsor Organizations:

      Federal Highway Administration

      1200 New Jersey Avenue, SE
      Washington, DC  United States  20590
    • Project Managers:

      Humphreys, Rebecca

    • Performing Organizations:

      Ohio State University Research Foundation

      1960 Kenny Road
      Columbus, OH    43210-1063
    • Principal Investigators:

      Witter, Jon

    • Start Date: 20151101
    • Expected Completion Date: 20190331
    • Actual Completion Date: 20190331

    Subject/Index Terms

    Filing Info

    • Accession Number: 01578113
    • Record Type: Research project
    • Source Agency: Ohio Department of Transportation
    • Contract Numbers: 135258, 100948, 27250
    • Files: RiP, STATEDOT
    • Created Date: Oct 13 2015 11:04AM