1910

• Population of King County is 284,638.

• King County Port Commission is created by popular vote as a separate municipal corporation.

• King and Pierce counties establish an inter-county flood control effort in the Green and White River valleys.

• The county-city building (now the King County Courthouse) is dedicated.
• County commissioners vote to close "The Willows," a stockade housing "lazy husbands" convicted under the Lazy Husband Act, due to cost overruns.
• County undertakes first traffic survey to determine future road improvement needs.

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