1606 SE EVERETT MALL WAY ANTHEM SELF STORAGE 2025-07-25

1 1 No. 7—Energy Dissipaters Maintenance Defect Conditions When Maintenance is Results Expected When ' Components Needed Maintenance is Performed External: Rock Pad Missing or Only one layer of rock exists above Rock pad replaced to design Moved Rock native soil in area five square feet or standards. 1 Erosion larger, or any exposure of native soil. Soil erosion in or adjacent to rock pad. Rock pad replaced to design standards. ' Dispersion Trench Pipe Accumulated sediment that exceeds Pipe cleaned/flushed so that it Plugged with 20%of the design depth. matches design. Sediment Not Visual evidence of water discharging at Trench redesigned or rebuilt to Discharging concentrated points along trench (normal standards. Water condition is a"sheet flow"of water along Properly trench). Intent is to prevent erosion damage. ' Perforations Over 1/2 of perforations in pipe are Perforated pipe cleaned or Plugged. plugged with debris and sediment. replaced. Water Flows Maintenance person observes or Facility rebuilt or redesigned to Out Top of receives credible report of water flowing standards. "Distributor" out during any storm less than the design Catch Basin. storm or its causing or appears likely to cause damage. ' Receiving Area Over- Water in receiving area is causing or has No danger of landslides. potential of causing landslide problems. Saturated Internal: ' Manhole/Chamber Worn or Structure dissipating flow deteriorates to Structure replaced to design Damaged 1/2 of original size or any concentrated standards. Post, worn spot exceeding one square foot Baffles, Side which would make structure unsound. of Chamber Other See"Catch Basins"(No.5). See"Catch Basins"(No. 5). Defects 1 1 1 1 1 1 4-38 Volume V—Runoff Treatment BMPs February 2005 1