Iron-Enhanced Swale Ditch Checks for Phosphorus Removal

The proposed research will measure the performance of iron-enhanced check dams in roadside swales as a novel stormwater treatment system developed specifically for capturing phosphate and toxic metals from roadway runoff in both urban and agricultural environments. Permeable check dams enhanced with iron filings have been developed and tested in the laboratory through a project funded by the Local Road Research Board (LRRB), and check dams have been designed and built through a project funded by the Minnesota Pollution Control Agency. The long-term effectiveness of these new enhancements is, however, yet to be investigated. This research will: (1) document the field performance of iron-enhanced swale check dams for three years; (2) determine the pollutant retention in the filter insert and in the entire check dam; (3) evaluate the long-term performance of the check dams; and (4) identify maintenance needs for continued successful performance of the check dams. Results from this study can be used to design systems for use along roadways throughout Minnesota and the United States. Results can also be used to estimate load reductions in Total Maximum Daily Load studies for future installations of iron-enhanced swales.


  • English


  • Status: Active
  • Funding: $200,036
  • Contract Numbers:

    99008 WO#243

  • Sponsor Organizations:

    Local Road Research Board

    395 John Ireland Boulevard
    St. Paul, Minnesota  United States  55155-1899

    Minnesota Department of Transportation

    395 John Ireland Boulevard
    St Paul, MN  United States  55155
  • Managing Organizations:

    Minnesota Department of Transportation

    395 John Ireland Boulevard
    St Paul, MN  United States  55155
  • Project Managers:

    Holdhusen, Bruce

  • Performing Organizations:

    University of Minnesota, Minneapolis

    Department of Civil, Environmental, and Geo- Engineering
    500 Pillsbury Drive SE
    Minneapolis, MN  United States  55455
  • Principal Investigators:

    Gulliver, John

  • Start Date: 20160616
  • Expected Completion Date: 20190831
  • Actual Completion Date: 0

Subject/Index Terms

Filing Info

  • Accession Number: 01608026
  • Record Type: Research project
  • Source Agency: Minnesota Department of Transportation
  • Contract Numbers: 99008 WO#243
  • Files: RiP, STATEDOT
  • Created Date: Aug 25 2016 3:44PM