The Huron-Clinton Metropolitan Authority (Metroparks) has implemented a storm water management program to reduce the discharge of pollutants to the Waters of the State within its jurisdiction. This plan has been developed to fulfill the requirements for Part I. Section B of the State of Michigan’s National Pollutant Discharge Elimination System (NPDES) General Permit (MIS049000) for Storm Water Discharges from Separate Storm Water Drainage Systems (MS4s). Although it operates under a Jurisdictional Permit, the HCMA has been participating in the watershed planning process with the Stony/Paint Creek, Lower Huron and Kent Lake Sub-watershed Groups.The Metroparks has property within both the Huron and Clinton River Watersheds and the Storm Water Management Plan (SWMP) has been implemented within the requested area of coverage as determined by the urbanized areas outlined in the General Permit.

The purpose of the SWMP is to develop a program to implement the six minimum measures as required by the General Permit which include:

1. Public Education Plan (PEP)
2. Public Involvement and Participation Plan (PIP)
3. Illicit Discharge Elimination Plan (IDEP)
4. Post Construction Storm Water Management Program for New Development and Redevelopment Projects
5. Construction Storm Water Runoff Control
6. Pollution Prevention / Good Housekeeping for Municipal Operations

1. Educating the public, HCMA employees and its vendors on potential negative impacts of storm water discharge on receiving waters.
2. Training appropriate HCMA staff on the investigation of illicit connections and discharges, including those from on-site disposal systems (OSDS) with emphasis on outfall observations/screenings, safety issues and natural occurring phenomenon.
3. Implementing a system for identifying and eliminating illicit discharges and connections to the MS4s including outfall observations and follow-up sampling.
4. Locating and accurately mapping the storm water conveyances and outfalls owned and operated by the HCMA within the requested area of coverage.
5. Determining the ownership of other significant storm water conveyances in the HCMA and initiate a process to bring any “orphan” drains under proper jurisdiction.
6. Working with the Drain Commissioner and County Department of Public Health in their efforts to develop and implement an OSDS inspection program.
7. Coordinating HCMA IDEP efforts with other local communities and impacted County agencies.
8. The identification and implementation of Best Management Practices (BMPs) to comply with the minimum measures of Part 1., including cooperation with other permittees as necessary to assure compliance.
9. The identification and implementation of BMPs to comply with storm water related requirements established in a corrective action plan to meet TMDLs as applicable.
10. Demonstration of effectiveness or environmental benefit of the program.