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Environment

Olmsted County works to preserve existing natural areas and wildlife, promote sound policies, educational and discussion opportunities.

Decorah Edge

The “Decorah Edge” is defined as the area in which the Decorah, Platteville, or Glenwood formation is the first encountered bedrock according to the “Bedrock Geology: Steele, Dodge, Olmsted and Winona Counties” data plate produced by the Minnesota Geological Survey – University of Minnesota in 2004, as modified by field investigation or more precise mapping; and having a depth to bedrock of less than twenty-five feet according to the “Depth to Bedrock: Steele, Dodge, Olmsted and Winona Counties” data plate produced by the Minnesota Geological Survey – University of Minnesota in 2004, as modified by field investigation, reliable well logs, or more precise mapping; and for which there are contiguous adjacent areas with the Cummingsville or higher formations as the first encountered bedrock.

  • City of Rochester Decorah Edge Features Map
  • City of Rochester Decorah Edge Map Showing Hydric Soils and Cummingsville Formation
  • Section 9.20 Decorah Edge Overlay District
  • Olmsted County Wetland Conservation Ordinance
  • City of Rochester Unified Development Code

Decorah Edge Features Maps

  • Cascade TWP
  • Dover TWP
  • Elmira TWP
  • Eyota TWP
  • Farmington TWP
  • Haverhill TWP
  • High Forest TWP
  • Kalmar TWP
  • Marion TWP
  • New Haven TWP
  • Orion TWP
  • Oronoco TWP
  • Pleasant Grove TWP
  • Quincy TWP
  • Rochester TWP
  • Rock Dell TWP
  • Viola TWP

Wetlands

  • Olmsted County Wetland Conservation Ordinance

City of Rochester Wetland Maps

  • Wetlands - North Half of City
  • Wetlands - South Half of City

Olmsted County Potential Future Wetlands

  • Map of Potential Future Wetland Areas Within Olmsted County
  • Wetlands 101

Olmsted County Water Management Plan

Visit the Olmsted County Water Resources webpage to review the Comprehensive Watershed Managment plans within Olmsted County.

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  • Planning, Land Use, & Zoning

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