The Revised Code of Washington describes SR 230 as an east–west route that begins at a junction with I-90 (concurrent with US 395) near Ritzville.

The highway would travel east "by the most feasible route" to SR 23 near Ewan, a rural community in Whitman County.

[1] A 1956 map showed an alignment that passed Finnell and Crane lakes before dipping south and turning northeast.

[2] The Washington State Highway Commission estimated the total length of the corridor to be 27.82 miles (44.77 km) in a 1960 report.

[13][14] An evaluation of unbuilt highway projects by the state government published in 1972 determined that constructing SR 230 would have a low cost–benefit ratio and serve little traffic.