Carlson, Rich 3a. Holzem, Warren 4. King, Michael 5. Koerner, Michael G. 6. Chicago Sun-Times, August 20, 1999.
Blast fells damaged bridge as scripted'.
Milwaukee Journal-Sentinel, Dec. 28, 2000. Post to misc.transport.road, Feb. 17, 2001. Personal e-mail, Aug. 31, 2000. Personal e-mail, Feb. 16, 2001. Unnamed sources are either maps or personal experience.