When the current state highway numbering system was first posted in January 1964, SR 833 started on the Longview-Rainier (now Lewis and Clark) Bridge and ended at Jct SR 832 in Longview. In 1968, SR 832 was renumbered SR 432. SR 833 was renumbered SR 433.
Before 1964, SR 830 had been a branch of PSH 12.
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