Minnehaha Creek Watershed District (MCWD) partnered with the City of Richfield to improve the water quality in Taft Lake and Legion Lake through a combination of project elements, including infiltration systems, a water treatment system to treat water from Taft Lake, native lakeshore buffers, and pre-treatment of runoff to Legion Lake. These strategies improve water quality by treating and filtering stormwater runoff and reducing the nutrient load in both Taft and Legion lakes, both of which drain into Lake Nokomis and ultimately Minnehaha Creek.

The City of Richfield led the design and construction of the project and manages ongoing operations and maintenance, while MCWD provided financial assistance for the design and construction.

At a Glance

  • Richfield
  • Minnehaha Creek Subwatershed
  • Status: Complete
  • 2016

MCWD Staff Contact

Josh Wolf



Supporting Materials

Feasibility Study — Taft-Legion Volume and Load Reduction Project (PDF)

Project Cost


Project Timeline

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Planning Phase

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Planning Phase

2010- Planning phase begins

2013 – Planning phase ends

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Design Phase

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Design Phase

2013 – Design phase begins

2015 – Design phase ends

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Construction Phase

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Construction Phase

2015 – Construction begins

2016 – Construction completed

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Project completion

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Project Completion

2016 – Project completed

By the Numbers



phosphorus removed annually



volume reduced annually



native prairie established along Legion Lake

Project Highlights

  • Habitat enhancement through the establishment of native prairie
  • Reduced runoff volume to downstream Lake Nokomis
  • Nutrient load reduction in Taft and Legion lakes
  • Improved water quality for Lake Nokomis
Lake Nokomis


In 2011, MCWD and the City of Richfield signed a Memorandum of Understanding (MOU) identifying the City’s desire to construct and operate a regional stormwater treatment facility. In 2013, MCWD and the City of Richfield signed a Cooperative Agreement to construct, operate, and maintain this water quality improvement project for Legion and Taft Lakes.

Richfield, MN city logo


Project Cost: $2,654,387

MCWD funded the entirety of this project’s construction, and the City of Richfield maintains and operates the treatment systems.