Owatonna, MN

Downtown Stormwater Improvements

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Urban Stormwater
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Permitting + Compliance
Planning + Feasibility
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Downtown Stormwater Improvements

After years of flooding issues downtown, the City of Owatonna hired ISG to determine approaches reconstruct the area’s stormwater management infrastructure. ISG created a complex model of all drainage areas and provided a list of best management practices (BMPs) that could be incorporated over time. The first phase of proposed projects have been completed and led to ISG developing a stormwater management plan and designing projects for a proposed 700-acre industrial park.

Blog: Creating Flood-Resilient Communities: A Case Study in Floodplain Management +

Key Points
  • Multiple urban improvement projects 
  • Complex drainage modeling 
  • Provided a list of permanent BMPs that could be incorporated in the future 
  • Ditch realignment, wetland mitigation, and multi-cell pond system design 
  • Infiltration basins, permeable improvements, and stormwater solutions to prevent flooding

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