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Stormwater System Information
The City of Duvall, through its NPDES Municipal Permit, is responsible for ensuring proper maintenance and operation of all public and private stormwater systems within the City. This includes 30 miles of pipes, 2,807 public and private catch basins, 125 known municipally owned or operated stormwater treatment and flow control BMPs/facilities.
The Stormwater Utility:
- Ensures that public and private stormwater systems are planned, developed, and maintained to prevent flooding, protect water quality, and preserve natural stormwater systems.
- Monitors water quality and provides leadership and focus for community efforts working toward improved stormwater management.
- Identifies needs for capital improvement of the stormwater systems including streams and habitat, prioritizes, selects, and constructs those improvements.
- Ensures that City construction and maintenance projects are planned and implemented to cause as little short term and long term harm as possible to the environment.
The City is Addressing Stormwater Management in 3 Phases: |
Planning: | Development:
| Maintenance:
|
Applications
Construction projects typically require a Construction Stormwater General Permit.
Additional Reports
- 2018 Stormwater Facility Maintenance Manual
- 2018 Surface and Stormwater Management Plan (FINAL)
- 2021 King County Surface Water Design Manual
- 2016 Maintenance Yard Stormwater Pollution Prevention Plan
- 2012 Assessment of Residential and Business Understanding and Adoption of Targeted Stormwater
- 2009 Stormwater Research Report
Contact Us
-
To Report Illicit Discharges or Spills:
425.939.8040
425.419.3748, (after hours, Public Works Emergency Only, Please note this number does not receive text messages)
Non-emergency information may also be sent to Email
Office
26512 NE Stella St
Duvall, WA 98019
DirectionsHours
Monday – Friday: 7:00 a.m. – 3:30 p.m.
AFTER HOURS EMERGENCIES
PUBLIC WORKS: 425-419-3748
SEWER: 425-419-7178
Please note these numbers do not receive text messagesAll other Emergencies: 911