Stormwater Ordinance Update

Current City ordinances dealing with stormwater address much of the regulatory requirements placed on the City as well as the goals the City has to protect local resources. However, recent changes implemented by the Minnesota Pollution Control Agency (MPCA) in 2013 have resulted in the City needing to make changes to its ordinances. The City has been covered under the National Pollutant Discharge Elimination System (NPDES) Municipally Separate Storm Sewer System (MS4) Program since 2003. The 2013 Permit updates required the City to review and update official controls (e.g., standards, policies, ordinances) dealing with three primary provisions of the MS4 Permit:

• Illicit Discharge Detection and Elimination
• Construction Site Erosion and Sediment Controls
• Permanent Stormwater Management

The City’s Illicit Discharge Ordinance language currently meets requirements and City goals. Therefore, this ordinance update will address the Construction Site and Permanent Stormwater sections of the ordinance. While the focus of the update is on the NPDES Permit requirements, updates to stormwater design standards and regulatory mechanisms are also being addressed. The ordinance updates have considered the following state, local and City programs and plans:

• 2013 NPDES MS4 Permit Reauthorization
• Atlas 14 Rainfall Precipitation-Frequency updates
• The City’s 3rd Generation Water Resources Management Plan
• Northwest Expansion Area AUAR (2007) and Update (2014)
• Northwest Area Storm Water Manual (2006)
• Lower Mississippi River Watershed Management Organization Plan (2015)
• Eagan Inver Grove Watershed Management Organization Plan (2015 Draft)
• Dakota County SWCD Low-Impact Development Guidelines

The formal schedule for adopting the ordinance updates will begin with the Planning Commission on October 4th, followed by the 1st Reading at the October 24th, 2016, Regular Council Meeting.

Draft Ordinance