This is an excellent Google driven resource tool! You can even measure distances off of satellite maps... Monte
US ARMY Corps of Engineers Public Web Site: Corps Data, Layers of Information, Locks Data, etc.
( https://corpslocks.usace.army.mil/ ).
The following features have recently been added to the site and one or the other may provide information that would be useful to you.
RIVER-AT-A-GLANCE - This allows the selection of a range of locks on a waterway to see the vessel locations either arriving or leaving a lock. Included is a map feature for an individual vessel or the Show All Vessels map feature. Since the USCG is the owner of AIS data and prohibits other agencies from posting vessel location based on it, the maps for the public are based on the LPMS data rather than the AIS signal.