duluth’s storm sewers chris kleist. overview my background about duluth storm sewer 101 june flood...
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Duluth’s Storm SewersChris Kleist
Overview
• My background• About Duluth• Storm sewer 101• June flood • Flooding issues• Considerations
Background
• Ely, MN• Outdoors• Guiding • Stormwater and
Wastewater Industry
Today
• Program Coordinator - Stormwater• MS4 Permit Compliance• Duluth’s Utilities
Duluth
• 26 miles long• 883 feet elevation• 431 miles storm sewer pipe
– 12,000 catch basins– 5600 manholes– 100+ miles of ditching
Duluth
• 26 miles long• 883 feet elevation• 431 miles storm sewer pipe
– 12,000 catch basins– 5600 manholes– 100+ miles of ditching
MS4 Program
• Stormwater NOT treated• Series of Minimum Control Measures and Best
Management Practices• Education• Illicit discharge• Inspections• Good housekeeping
Stormwater Basics
• Rainwater and snowmelt• Impervious surface• Pollution sources• MEP
Duluth Stormwater Program
• Illicit Discharge• Stormwater Billing• Best Management Practices
(BMPs)– Structural– Non-structural
• Runoff, erosion, and sediment issues
Duluth Stormwater Program
• Cleaning• Maintenance• Inspection• Plan review• Technical assistance
Storm Sewer Challenges
• Trout streams– Pollution
• Sediment• Temperature
– DNR• Maintenance• Fish passage
Storm Sewer Challenges
• Volume Control– Infiltration– Rate control– Water Quality
Storm Sewer Challenges
• Budget• Old system• Increasing regulations
– MS4– TMDL– Non-Degradation