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Appendix E: Illustrations of Delay and Possible Metrics by Major River System
Pages 185-193

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From page 185...
... With regard to lost service, Figure E-1b shows that delays are correlated with tonnage handled, which suggests that larger tows and longer processing time for a given vessel transit may result in queuing delays for other vessels; this is shown as the increasing blue segments of the stacked bar chart. Three locks on the Ohio River have greater 1 Lock Use, Performance, and Characteristics, http://www.navigationdatacenter.us/lpms/lpms.htm, Locks by Waterway, Tons Locked by Commodity Group, Calendar Years 1993–2013; Locks by Waterway, Lock Usage, Calendar Years 1993–2013; and Locks by Waterway, Locks Unavailability, Calendar Years 1993–2013.
From page 186...
... commodities moved, commercial lockages, and vessel counts and (b) nonproductive time per year due to delays and unavailabilities (scheduled and unscheduled)
From page 187...
... Finally, in view of the fact that Mississippi locks are on upper river regions while the Lower Mississippi River does not have fixed lock and dam infrastructure, the figure should be interpreted as showing river cargo and vessel transits associated with the Upper Mississippi lock infrastructure rather than total Mississippi River activity.
From page 188...
... commodities moved, commercial lockages, and vessel counts and (b) nonproductive time per year due to delays and unavailabilities (scheduled and unscheduled)
From page 189...
... Lock 27 and Melvin Price also experience more hours of unscheduled unavailabilities than do other downstream locks. For the Illinois River, Figure E-3a shows similar but less dramatic increases in commodity volumes handled downriver and correlations between vessels and lockages similar to those of the Mississippi River.
From page 190...
... commodities moved, commercial lockages, and vessel counts and (b) nonproductive time per year due to delays and unavailabilities (scheduled and unscheduled)
From page 191...
... commodities moved, commercial lockages, and vessel counts and (b) nonproductive time per year due to delays and unavailabilities (scheduled and unscheduled)
From page 192...
... commodities moved, commercial lockages, and vessel counts and (b) nonproductive time per year due to delays and unavailabilities (scheduled and unscheduled)
From page 193...
... [Figures E-1 through E-5 all use the same y-axis scales to facilitate comparison, and each is aligned from upstream to downstream location to illustrate how delay and tonnage moved (i.e., traffic congestion) are related.]


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