Figure 1-3 U.S. Lock Usage by Type, 1993-2006

Figure 1-3 U.S. Lock Usage by Type, 1993-2006

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  Barges Empty Barges Loaded Commercial Lockages Commercial Vessels Other Lockages* Other Vessels*
1993 955,596 1,601,853 471,605 536,716 10,462 12,351
1994 976,444 1,761,123 501,045 571,472 11,996 14,310
1995 1,038,496 1,756,099 495,506 564,153 12,580 14,815
1996 1,036,587 1,730,702 488,051 557,010 12,232 14,028
1997 1,002,348 1,701,706 486,199 555,440 12,263 13,969
1998 967,426 1,734,723 485,390 552,841 13,144 14,997
1999 1,049,631 1,808,014 497,084 559,888 13,025 14,759
2000 996,008 1,764,081 582,776 544,778 9,352 10,655
2001 946,613 1,691,546 555,926 525,856 9,639 10,901
2002 1,003,131 1,744,881 571,310 535,587 9,350 10,668
2003 930,941 1,622,718 547,589 515,047 9,578 11,158
2004 878,515 1,619,610 539,204 518,448 10,215 13,092
2005 893,100 1,642,297 535,021 515,393 9,941 12,784
2006 905,839 1,655,604 538,580 507,093 9,864 12,631

NOTE: * "Other lockages" and "other" vessels are too close to the x axis to be seen.

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.