Wash. Rev. Code § 47.17.120
A state highway to be known as state route number 28 is established as follows: Beginning at a junction with state route number 2 in the vicinity east of Wenatchee, thence southeasterly to a junction with state route number 281 at Quincy; also From that junction with state route number 281 at Quincy, thence easterly by way of Ephrata and Odessa to a junction with state route number 2 at Davenport.
[ 1970 ex.s. c 51 s 25.]