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Fact Sheet

Event Study - Lock 27 Closures



Start Date:  Mar 2006

End Date:
 Sep 2006






Problem Addressed:  

Lock 27 at Mississippi River Mile 185 experienced closures for repairs in 2004 and 2005. In 2004 the main chamber was closed between 26 July and 10 August for gate repairs. In 2005 the main and auxiliary lock chambers were sequentially closed to navigation traffic between October 2005 and February 2006 for needed replacement of gate operating machinery.





The study objective was to discern the total costs incurred and operational changes made by industry associated with each closure event. The OMNI data analysis aimed to identify changes in operating procedures attributable to the closure and to draw comparisons with the industry survey responses. The survey for the 2004 closure was conducted between 25 February and 28 March 2005. The survey for the 2005 closure was conducted between 14 April and 12 May 2006. Separate closure event reports were compiled for the 2004 and 2005 closures of Lock 27.




The data will provide important information that will bear on future repair, rehabilitation or other construction-related decisions regarding the Lock 27 facility.








Contract Data:

130465, W1060




Products (Bookshelf/Toolbox):

Report by Planning Center of Expertise for Inland Navigation, Oct 17,2006 (521 KB, pdf)

Report by Planning Center of Expertise for Inland Navigation, Oct 17,2006 (720 KB, pdf)



Related Links:




Revised 23 Sep 2011

Source: Navigation Economic Technologies Program

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