エンパイア・ビルダー
In 1970, the construction and filling of Lake Koocanusa necessitated the realignment of 60 miles of track between Stryker, Montana, and Libby, Montana, and the construction of Flathead Tunnel, leading the "Empire Builder" to drop service to Eureka, Montana. The "Empire Builder" also served Troy, Montana, until February 15, 1973.