23.30.020

Unless the location of zone boundary lines is expressly established by reference to established lines, points, or features on the Official Land Use Map, the zone boundary lines are the centerlines of streets, including freeways, expressways and parkways, public alleys, waterways, or railroad rights-of-way; or in the case of navigable water, the pierhead or outer harbor lines; or in the case of Lake Union, the "Seattle Construction Limit Line" as established by Section 23.60A.016 . Where the pierhead, outer harbor lines, or construction limit lines are not established, then the zone boundary lines shall be on the water side of the natural shoreline and 500 feet, measured at right angles, from the shoreline. If the exact location of a zone boundary line cannot be determined otherwise, then its location shall be determined by measuring to scale on the Official Land Use Map. (Ord. 125603 , § 6, 2018; Ord. 117570, § 8, 1995; Ord. 110381, § 1(part), 1982.)