Outfall Maintenance

What This Service Involves

Outfalls are the discharge points where the storm system meets streams, lakes, and Puget Sound, and they are focal points for permit inspection. Our crews clear blockages, repair erosion and riprap, and inspect for the dry-weather flows that signal illicit discharges. Findings feed directly into your Illicit Discharge Detection and Elimination program and outfall inventory. We document each outfall's condition to support Phase II mapping and reporting.

Benefits

Unobstructed outfalls that discharge as designed; erosion and riprap repair that protects the discharge point; dry-weather screening that flags illicit discharges; data that strengthens your illicit discharge program; documented condition for Phase II outfall inventories

Our Process

1) Locate outfalls and inspect for flow, erosion, and blockage; 2) Clear debris and repair erosion or riprap as needed; 3) Screen for dry-weather flow and sample if indicated; 4) Record condition and report any suspected illicit discharge

What Affects the Cost

Number and accessibility of outfalls; extent of erosion or riprap repair; vegetation clearing to reach discharge points; sampling and testing when discharges are found; documentation and mapping effort

Best Time of Year

Dry-weather screening is most reliable during the summer, while flow and erosion inspections continue through the winter high-flow season.