1. Duluth’s Storm Sewers Chris Kleist

3. Overview My background About Duluth Storm sewer 101 June flood Flooding issues Considerations

4. Background Ely, MN Outdoors Guiding Stormwater and Wastewater Industry

5. Today Program Coordinator - Stormwater MS4 Permit Compliance Duluth’s Utilities

6. Duluth 26 miles long 883 feet elevation 431 miles storm sewer pipe –12,000 catch basins –5600 manholes –100+ miles of ditching

7. Duluth 26 miles long 883 feet elevation 431 miles storm sewer pipe –12,000 catch basins –5600 manholes –100+ miles of ditching

8. MS4 Program Stormwater NOT treated Series of Minimum Control Measures and Best Management Practices Education Illicit discharge Inspections Good housekeeping

9. Stormwater Basics Rainwater and snowmelt Impervious surface Pollution sources MEP

10. Duluth Stormwater Program Illicit Discharge Stormwater Billing Best Management Practices (BMPs) –Structural –Non-structural Runoff, erosion, and sediment issues

11. Duluth Stormwater Program Cleaning Maintenance Inspection Plan review Technical assistance

12. Storm Sewer Challenges Trout streams –Pollution Sediment Temperature –DNR Maintenance Fish passage

13. Storm Sewer Challenges Volume Control –Infiltration –Rate control –Water Quality

14. Storm Sewer Challenges Budget Old system Increasing regulations –MS4 –TMDL –Non-Degradation