NASBLA Public Library

In 2010/2011, a typical La Nina winter brought turbulent winter floods which significantly changed river channels, undercut banks, relocated gravel bars, and reoriented large wood, creating many new hazards and changing known hazards. In addition, an unusually heavy snow pack in the Cascade Range river basins, foretold of higher and colder than usual flows in King County Rivers well into the summer recreational season. These factors led the King County Executive and the King County Council to support the implementation of a temporary ordinance (Ordinance 17124) requiring that personal flotation devices (PFD) be worn in King County’s major rivers from June 21 to October 31, 2011.
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