"Figure 1-4 U.S. Locks Percent Vessels Delayed, 1993–2006",
,Percent Vessels Delayed (%)
1993, 37.59 
1994, 36.45 
1995, 36.28 
1996, 37.34 
1997, 37.27 
1998, 35.61 
1999, 35.76 
2000, 37.19 
2001, 37.96 
2002, 36.79 
2003, 36.42 
2004, 38.02 
2005, 39.02 
2006, 39.31 
• Vessel delays have increased dramatically since 2003. ,
• Age of locks is considered to be a major factor in vessel delays. ,
NOTE: The percentage of all vessels delayed before passing through a lock chamber.,
"SOURCE: U.S. Army Corps of Engineers, Waterborne Commerce Statistics Center, Navigation Data Center, available at www.iwr.usace.army.mil/ndc as of April 2007.",