Complex sentence: The Breitenbush Guard Station in Willamette National Forest, Detroit, Oregon was designed by architects of the United States Forest Service and was built by the Civilian Conservation Corps in 1935.
Split into simpler sentences: The Breitenbush Guard Station in Willamette National Forest, Detroit, Oregon was designed by the USDA Forest Svce. Architecture Group and was built by the Civilian Conservation Corps in 1935.