Minnesota Department of Transportation

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Project development

Environmental process | Environmental review



The purpose of this guidance is to direct you to the procedures necessary to avoid long- and short-term adverse impacts associated with the occupancy and modifications of floodplains and preserve the natural and beneficial values those floodplains serve.

When to use this subject

If your project lies adjacent to or crosses a floodplain area transversely, longitudinally, or both, you must consider impacts to those floodplains.

For specific process information, see the process page and/or contact the individual on the contacts page.

How this subject fits into the overall project development process

Start this part of the project in the scoping phase and complete the Floodplain Assessment in the environmental review phase.  Obtain permits prior to project letting.

Organizations involved

  • MnDOT:
  • Federal Highway Administration (FHWA)
  • US Army Corps of Engineers (USACOE)
  • United States Environmental Protection Agency (USEPA)
  • Federal Emergency Management Agency (FEMA)
  • United States Coast Guard (USCG)
  • Minnesota Department of Natural Resources (MNDNR)
  • Minnesota Pollution Control Agency (MPCA)
  • Watershed Districts