Puyallup, WA Environmental Rules: Erosion Control (2026)

020, requires a permit before any land-disturbing activity begins. 070 makes the plan requirement mandatory: no person may initiate land-disturbing activity without a permit, work must follow the approved sequence, and a vegetated buffer must confine visible siltation within the 25 percent of the buffer nearest any environmentally sensitive area. Graded slopes and fills may be exposed no longer than 30 working days before ground cover or erosion control devices restrain erosion, and permits are not transferable. 5 factor of safety, and fills are flatly prohibited within the regulatory floodway.

300 bars clearing in any protected area, native growth protection easement, or greenbelt without a permit, and requires the limits of sensitive area setbacks to be fenced before any adjacent clearing begins. The city engineer inspects at defined stages, including installation of sediment control measures, rough grading, and final grading, and can issue a stop-work order without prior warning where land disturbance proceeds without a permit or where required sediment controls are missing. 375 adds a distinct Puyallup River valley obligation: if excavation uncovers suspected historic or cultural artifacts, all work must stop immediately and the developer must notify the city, the State Department of Archaeology and Historic Preservation, the Puyallup Tribe of Indians, and the Muckleshoot Indian Tribe.