State route No. 278.

RCW 47.17.503
in effect
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A state highway to be known as state route number 278 is established as follows: Beginning at a junction with state route number 27 in Rockford, thence easterly and southerly to the Washington-Idaho boundary. A state highway to be known as state route number 278 is established as follows: Beginning at a junction with state route number 27 in Rockford, thence easterly and southerly to the Washington-Idaho boundary.
Source: WA Statutes (Official Site)URL: https://app.leg.wa.gov/RCW/default.aspx?cite=47.17&full=trueFetched: 6/29/2026

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