 The building, which cost $25,000 to complete, was cut into service in May 1968, and is still in use.The exchange office was originally equipped to handle 400 subscribers.The construction of a two-lane steel truss bridge over the Yakima River west of Thorp in 1936, prepared the way for the designation of the Thorp Highway, from State Route 10 (SR 10) to US 97, as SSH 3M (Secondary State Highway 3M) in 1937.