Wash. Rev. Code § 58.09.130
When adequate records exist as to the location of subdivision, tract, street, or highway monuments, such monuments shall be located and referenced by or under the direction of a land surveyor at the time when streets or highways are reconstructed or relocated, or when other construction or activity affects their perpetuation. Whenever practical a suitable monument shall be reset in the surface of the new construction. In all other cases permanent witness monuments shall be set to perpetuate the location of preexisting monuments. Additionally, sufficient controlling monuments shall be retained or replaced in their original positions to enable land lines, property corners, elevations and tract boundaries to be reestablished without requiring surveys originating from monuments other than the ones disturbed by the current construction or activity.
It shall be the responsibility of the governmental agency or others performing construction work or other activity to provide for the monumentation required by this section. It shall be the duty of every land surveyor to cooperate with such governmental agency or other person in matters of maps, field notes, and other pertinent records. Monuments set to mark the limiting lines of highways, roads, or streets shall not be deemed adequate for this purpose unless specifically noted on the records of the improvement works with direct ties in bearing or azimuth and distance between those and other monuments of record.
RCW 58.09.130