Nuisance does not become legal by prescription.

RCW 7.48.190
in effect
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No lapse of time can legalize a public nuisance, amounting to an actual obstruction of public right. No lapse of time can legalize a public nuisance, amounting to an actual obstruction of public right.
Source: WA Statutes (Official Site)URL: https://app.leg.wa.gov/RCW/default.aspx?cite=7.48&full=trueFetched: 6/28/2026

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