Catch Basin Maintenance

What This Service Involves

Catch basins fill with sediment, leaves, and debris that reduce inlet capacity and carry pollutants toward receiving waters. Our crews vactor out accumulated material, inspect structure integrity, and record sump depths against your NPDES permit thresholds. Cleaning frequency and the 60-percent sump cleaning trigger are documented to satisfy Ecology reporting under the Western Washington Phase II permit. Collected decant and solids are disposed of at approved facilities.

Benefits

Restored inlet capacity that reduces localized flooding; sump measurements documented against permit triggers; Ecology-ready records for Phase II reporting; approved disposal of vactor solids and decant; early detection of failing structures

Our Process

1) Locate and inspect basins, recording sump depth and condition; 2) Vactor out sediment, debris, and standing pollutants; 3) Verify capacity and note any structural repairs needed; 4) Document each basin and dispose of material at an approved site

What Affects the Cost

Number of basins and their sump volumes; sediment load and cleaning frequency; traffic control at in-street structures; decant and solids disposal fees; access for vactor equipment

Best Time of Year

Cleaning is prioritized in late summer and early fall to restore capacity before the region's heavy October-through-March rains.