Skip to main content
Start of main content

City of Eagan Water Quality Improvement Program

Reducing phosphorus helps to promote cleaner water for City of Eagan lakes

  • Eagan, Minnesota

    Eagan, Minnesota

Filtration and infiltration technologies reduce total phosphorus from entering downstream lakes to improve water quality

In the “Land of 10,000 Lakes,” the City of Eagan has improved or maintained water quality in its own lakes through a comprehensive management program. Recognizing that water quality in lakes and wetlands can be negatively impacted by phosphorus as impervious surfaces increase in a watershed, the program set aggressive goals to reduce nutrients entering area lakes. To achieve these goals, our water experts designed and implemented a variety of strategies to reduce phosphorus.

At LeMay Lake, we designed an infiltration trench to create subsurface storage that filters and slowly drains stormwater, helping to reduce the speed and quantity of pollutants entering LeMay Lake. The infiltration trench has helped achieve the City’s nutrient reduction goal of 35 pounds per year of phosphorus. At Carlson Lake, we achieved a nearly 16 pound per year nutrient reduction by rerouting 90 acres of watershed runoff to an underground filter, far surpassing the City’s target for the lake of 12 pounds. Iron-enhanced sand filters were integrated into the existing ponds at Cliff and Fitz lakes. Installed within created pond “benches,” iron filings within the sand filters strip soluble pollutants, effectively reducing phosphorus export downstream.

With our support, the City’s water quality management program has been critical in reducing nutrient loads and excess algae growth. The cleaner lakes offer residents more recreational opportunities, such as fishing, and more sustainable aquatic environments.

At a Glance

Meet Our Team

Todd Shoemaker, Principal, Senior Water Resources Engineer

I’m committed to empowering others to achieve—I do this by ensuring my team always feels supported and heard.
Todd Shoemaker Principal, Senior Water Resources Engineer Read More

Todd Shoemaker

Principal, Senior Water Resources Engineer

We're better together

  • Become a client

    Partner with us today to change how tomorrow looks. You’re exactly what’s needed to help us make it happen in your community.

    Contact Us
  • Design your career

    Work with passionate people who are experts in their field. Our teams love what they do and are driven by how their work makes an impact on the communities they serve.

    Join the Team
End of main content
To top