Here are links to some good maps of the main river....This Corps of Engineers website has navigation charts for the entire river. It marks underwater dikes, channel, hazardous boating areas, etc. http://www.swt.usace.army.mil/navigation/navcharts.cfm

Here is the nav. chart for the lock and dam at I-430. http://www.swt.usace.army.mil/naviga...03/S54FILL.pdf

Upstream... http://www.swt.usace.army.mil/naviga...03/S53FILL.pdf

Further upstream... http://www.swt.usace.army.mil/naviga...03/S52FILL.pdf



Also be sure to take a look at the legend..... http://www.swt.usace.army.mil/navigation/Legend.pdf[/QUOTE]