FIGURE 5-6 Total Number of Hours of Lock Closures: 2000-2012
Friday, April 10, 2015
SOURCE: U.S. Army Corps of Engineers, Navigation Data Center, Lock Performance Monitoring System. Locks by Waterway, Locks Unavailability, Calendar Years 1993-2013
(February 19, 2014). Available at http://www.navigationdatacenter.us/ as of Februrary 2014.