Drainage Surfaces
The Maintenance and Operations (M&O) Surface Drainage Management section ensures that all drainage structures are maintained and in good working condition. This includes:
- Catch basins
- Culverts
- Drainage ditches
- Manholes
Drainage Section Responsibilities
- Maintenance of stormwater drainage facilities
- Managing runoff to prevent flooding, road damage
- Ditching to establish or re-establish flow lines
- Installation of temporary soil erosion and sediment control devices
- Emergency response to flooding
- Inventory of drainage facilities
Culverts & Catch Basins
- Resetting or replacement to meet WDFW fish passage standards
- Replacement of undersized culverts that restrict flow
- Annual maintenance for debris removal and cleaning
- Compliance with state and federal permitting requirements
- Adherence to "fish windows" during maintenance activities
- Use of best management practices (BMPs) to maintain fish friendly work areas