MSRC Funded Projects

Determining which iron minerals in iron-enhanced sand filters remove phosphorous from stormwater runoff
Project team: Beth Fisher, PhD, University of Minnesota Department of Earth Sciences, Institute for Rock Magnetism; Joshua Feinberg, PhD, University of Minnesota Department of Earth Sciences, Institute for Rock Magnetism; John Gulliver, PhD, University of Minnesota Department of Civil Engineering, St. Anthony Falls Laboratory; Chris Meehan, P.E. (MN), CFM, Wenck Associates
Project dates: October 2017 through December 2018
Mid-project presentation - June 2018

Field performance assessment of sediment and gross solids removal from surface inlet pretreatment practices for bioretention
Project team: Andy Erickson, Ph.D., P.E., Research Associate, University of Minnesota – St. Anthony Falls Laboratory; Matt Hernick, P.E., Associate Engineer, University of Minnesota – St. Anthony Falls Laboratory; Mitch Haustein, MS, Stormwater and Shoreland Specialist, Anoka Conservation District; Jared Wagner, BS, Water Resource Technician, Anoka Conservation District
Project dates: October 2017 through December 2018
Mid-project presentation - June 2018

Abstract: 

Bioretention, often called a rain garden, has become an increasingly common stormwater treatment option in Minnesota. Beyond stormwater treatment, bioretention areas have aesthetic and other benefits, and may be designed in a variety of ways to fit the characteristics of a given site. Without pretreatment, bioretention practices can accumulate sediment over time and eventually clog to the point of failure. Actual data on the effectiveness of pretreatment practices, whether from field studies or laboratory or field testing, is limited or varies widely in method and results. The performance effectiveness of small and simple above-ground pretreatment practices for bioretention is a significant knowledge gap for industry professionals. This grant application proposes a program of field-based performance testing of several pretreatment practices, both proprietary and non-proprietary, commonly used in Minnesota. We envision the performance data generated for these pretreatment practices will assist project designers, local government maintenance forces, and others by:

  • Providing a quantitative measurement of effectiveness of several pretreatment practices; 

  • Offering a common point of comparison for different practices, by using the same test method; 

  • Informing assumptions about maintenance frequency of the pretreatment practice, and the bioretention practice; 

  • Improving understanding of how these practices function; 

  • Prompting innovations or design improvements based on measured data;
  • Demonstrating a test method that can be applied in other locations and to other pretreatment practices.