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Most King County offices will be closed on July 4, for Independence Day.  
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King County establishes and maintains streets, roads and bridges in unincorporated areas of King County. To research establishment, construction and maintenance of present-day streets and bridges, start with County Council ordinances and motions, or contact the Map and Records Center of the King County Road Services Division.

This page features historical records relating to streets, roads and bridges in King County.









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The King County Archives building is currently closed, but our remote customer service hours are 9am-4pm, Monday through Friday.