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Mill Creek adopts updates to Critical Areas Ordinance, including Riparian Management Zones (RMZs) and buffer revisions
Summary
The council voted 6-0 to adopt comprehensive amendments to the city's Critical Areas Ordinance, aligning local rules with state best-available science, updating wetland buffers, adopting Riparian Management Zones tied to tree height, and clarifying mitigation and hazard-tree procedures.
The Mill Creek City Council unanimously adopted an ordinance Jan. 6 that amends the city’s Critical Areas Ordinance (CAM chapter references in the packet: Mill Creek Municipal Code chapters 17.32 and 18.06) to align local regulations with more recent state guidance and best-available science.
Planner staff and consultants explained several substantive changes: clearer rules for nonconforming uses and structures; adjustments to trails and mitigation requirements; an updated wetland-buffer table driven by wetland…
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