Wash. Rev. Code § 47.17.320
A state highway to be known as state route number 164 is established as follows: Beginning at a junction with state route number 18 in the vicinity of Auburn, thence southeasterly to a junction with state route number 410 at Enumclaw.
[ 1987 c 199 s 14; 1970 ex.s. c 51 s 65.]