TABLE 12-6 Saint Lawrence Seaway U.S. Locks Downtime by Cause: 1994-2004

TABLE 12-6 Saint Lawrence Seaway U.S. Locks Downtime by Cause: 1994-2004

Hours of downtime, unless otherwise noted

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  1994 1995 1996 1997 1998 1999 2000 2001 2002 2003 2004
Weather related 101.0 88.5 143.4 65.2 43.2 2.0 53.7 56.8 41.1 57.6 43.8
Vessel incident 17.7 32.6 38.3 31.2 43.3 46.3 27.8 45.1 16.9 15.9 15.0
All other causes 45.0 16.7 5.9 35.6 12.1 1.3 2.6 8.9 5.1 0.0 7.2
Weather (percentage of total) 62 64 76 49 44 4 64 51 65 78 66
Total 163.7 137.8 187.6 132.0 98.6 49.6 84.1 110.8 63.1 73.5 66.0

NOTES: Weather-related causes includes poor visibility and high wind/ice; All other causes includes lock equipment malfunction, civil interference, and water level/flow. These data pertain only to the two U.S. locks (Snell and Eisenhower) on the Saint Lawrence Seaway between the Port of Montreal and Lake Ontario. Canada operates another five locks along this portion of the Seaway, as well as other Seaway locks.

SOURCES: 1994-2001U.S. Department of Transportation, Saint Lawrence Seaway Development Corp. (SLSDC), Annual Reports (Washington, DC: Various years). Reports for 1997-2001 available at http://www.greatlakes-seaway.com/, as of March 2004. 2002, 2003, and 2004—-SLSDC, personal communication, March and December 2004 and February 2005.