Young, Karen, and Historic American Engineering Record. Bridge Comparison: Chimneys Bridge, Elkmont Vehicle Bridge, Crossover Bridge at Perry's Dam. Library of Congress Prints and Photographs Division: Historic American Engineering Record, 1996.

Young, Karen, and Historic American Engineering Record. Evolution of Major Roads - Great Smoky Mountains National Park Roads & Bridges. Library of Congress Prints and Photographs Division: Historic American Engineering Record, 1996.