Washington - Mason County

Mason County Washington has 18 places on the National Register of Historic Places including 9 places of Statewide significance. Significant places include Cushman No. 1 Hydroelectric Power Plant, Cushman No. 2 Hydroelectric Power Plant, Goldsborough Creek Bridge, High Steel Bridge and North Hamma Hamma River Bridge.

Prehistoric cultural affiliation(s) include (Southern) Coast Salish, Twana and Skokomish dating back to 5999 BC.

Some of the country's most noteable architects helped create the Mason County places including American Bridge Co., Colonial Building Co., Bonnel,J.E., & Sons, Clarence Clyde "Doc" Palmer, MacRae Brothers Co., Tacoma Light Dept., Tacoma City Light, Lima Machine Works, Peninsular Railway Co. and Fredrick H. Heath. Prominent architectural styles found in Mason Country are Classical Revival, Other and Beaux Arts.

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