Executive staff brief King County committee on proposed critical area regulations; public asks for better notice and enforcement

County executive staff briefed the King County Council Local Services and Land Use Committee on Feb. 19 about a proposed update to the county’s critical areas regulations, which the county must adopt under the Washington State Growth Management Act by December 2025.

Megan Smith of the Department of Natural Resources and Parks (DNRP) and Robin Probsting of the Department of Local Services (DLS) summarized the scope of critical areas (wetlands, fish and wildlife habitat conservation areas, riparian areas, critical aquifer recharge areas, frequently flooded areas and geologically hazardous areas) and explained that state law requires jurisdictions to use the best available science (BAS), demonstrate special consideration for salmonids and show that adopted measures will achieve no net loss of ecological functions and values.

Proposed code changes described by staff include increased riparian area widths in unincorporated King County, higher mitigation ratios for unavoidable impacts to riparian areas that align with Department of Ecology guidance, stronger protections for high‑value wetlands (Category 1 estuarine and coastal lagoon wetlands), new…