A state highway to be known as state route number 538 is established as follows:
Beginning at a junction with state route number 5 at Mt. Vernon, thence easterly to a junction with state route number 9.
RCW 47.17.780
State route No. 538.
1970 ex.s. c 51 s 157.
Official source: Washington State Legislature. Reproduced from public-domain Washington statutes; confirm against the official source for the current text. Not legal advice.