As a recap, the Wenatchee Southern was to build from Wenatchee to the Tri-Cities, connecting with the Milwaukee Road across the river from Beverly. At the time, in the 1920s, the Great Northern was not supplying the cars that Wenatchee area apple growers were needing to ship their product to market. Growers felt that they could get better service by connecting with another line.
Other than a short section of grading in the Wenatchee area, this line was never built.
Map is from my collection which shows the right of way from Wenatchee to Beverly.