State route No. 523.

RCW 47.17.727
in effect
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A state highway to be known as state route number 523 is established as follows: Beginning at a junction with state route number 99 and Northeast 145th Street in Seattle, thence easterly to a junction with state route number 522. A state highway to be known as state route number 523 is established as follows: Beginning at a junction with state route number 99 and Northeast 145th Street in Seattle, thence easterly to a junction with state route number 522.
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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