Figure 1-1 Number of Lockages and Vessels, 1993-2006

Figure 1-1 Number of Lockages and Vessels, 1993-2006

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  Total Lockages Total Vessels
1993 661,542 1,024,851
1994 721,615 1,182,099
1995 715,313 1,178,200
1996 693,177 1,130,147
1997 698,964 1,163,350
1998 697,716 1,189,952
1999 718,488 1,210,569
2000 793,838 1,140,600
2001 740,891 1,053,165
2002 779,455 1,104,595
2003 744,517 1,054,014
2004 722,128 1,006,217
2005 724,849 1,008,689
2006 715,273 962,144

NOTE: A lockage is the transfer of a vessel(s), or that part of the tow that can be contained in the lock chamber, through a chamber in a single direction.

SOURCE: U.S. Army Corps of Engineers, Waterborne Commerce Statistics Center, Navigation Data Center, available at http://www.iwr.usace.army.mil/ndc as of April 2007.

  • The number of lockages has remained basically flat over the past several years.
  • The number of vessels traversing the locks has declined since the peak in the late 1990s.
  • Barges (loaded and empty) remain the major vessel type traveling on the U.S. inland waterways.