"United States Topographic Map". United States Geological Survey. Retrieved January 10, 2016 – via Acme Mapper. The map includes mile markers along the Willamette River and most of the Molalla River.
Nelson, Lee H. (1960). A Century of Oregon Covered Bridges, 1851-1952: A History of Oregon Covered Bridges, Their Beginnings, Development and Decline, Together with Some Mention of the Builders and Techniques. Portland, Oregon: Oregon Historical Society. pp. 123–124. OCLC221134668.
