Stelmack, Thomas;"Maroon Creek Bridge Replacement"(PDF). Archived from the original(PDF) on 2012-04-02. Retrieved 2011-09-24.; Aspire; March 2008; retrieved September 23, 2011; p. 38–45.
Stelmack, Thomas;"Maroon Creek Bridge Replacement"(PDF). Archived from the original(PDF) on 2012-04-02. Retrieved 2011-09-24.; Aspire; March 2008; retrieved September 23, 2011; p. 38–45.