From 1967 to 1992, the State Route 140 designation was used for a highway that started at Jct SR 14 in Washougal and headed upstream alongside the Washougal River into the hills north of the Columbia River. Inside Skamania County, SR 140 left the Washougal River and returned to SR 14 a mile or two west of Prindle. Before 1967, SR 140 had been designated as SR 120. Effective April 1, 1992, SR 140 was dropped from the state highway system.
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