"Figure 1-1  Number of Lockages and Vessels, 1993-2006
",,
(thousands),,
,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 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 remain the major vessel type traveling on the U.S. inland waterways.,,