Wash. Rev. Code § 47.17.660
A state highway to be known as state route number 505 is established as follows: Beginning in Winlock, thence via Toledo, easterly and southerly to a junction with state route number 504 in the vicinity north of Toutle.
[ 1991 c 342 s 36; 1970 ex.s. c 51 s 133.]
Effective dates—1991 c 342: See note following RCW 47.01.425.