RCW 47.17.030
State route No. 7.
A state highway to be known as state route number 7 is established as follows:
Beginning at a junction with state route number 12 in the vicinity of Morton, thence northerly to a junction with state route number 706 at Elbe; also
From that junction with state route number 706 at Elbe, thence northerly to a junction with state route number 5 at Tacoma.
[ 1970 ex.s. c 51 § 7.]