Stormwater Management Program


Aerial view of bridge crossing a riverMDOT maintains over 10,000 miles of roads and their associated drainage systems. While this transportation network supports extensive commerce and travel, it also accumulates contaminants from vehicles, road construction, maintenance and adjacent contributing drainage areas.

A National Pollutant Discharge Elimination System (NPDES) Permit issued by Michigan Department of Environmental Quality (MDEQ) in April of 2004 authorizes MDOT to operate storm sewer systems throughout the State by utilizing 6 minimum control measures.  The 6 minimum measures include:

  • Education and outreach on stormwater impacts- public education program (PEP)
  • Public involvement/participation
  • Illicit discharge elimination program (IDEP)
  • Post construction stormwater management program for new development and redevelopment projects
  • Construction stormwater runoff control
  • Pollution prevention/good housekeeping for MDOT operations

To comply with the permit, MDOT developed a Stormwater Management Plan (SWMP). The SWMP is designed to enhance the way MDOT does business so that stormwater pollution is reduced or eliminated. Solutions in the SWMP are as simple as good housekeeping, or as complex as building new facilites to manage stormwater.

This SWMP describes the procedures and practices MDOT currently uses throughout the planning, design, construction, operation and maintenance of the transportation infrastructure to limit the discharge of pollutants from its storm drainage systems. It also documents the commitment by MDOT to develop and implement additional stormwater management procedures and practices.


Phase II Storm Water Management Plan