So I was able to catch the Joseph L. Block as she approached Cleveland.
But sadly, this was a close as she would come while I was there. She had to wait for both the Buffalo and Sam Laud to do their work. Since it took a while for the Buffalo to get out of the River and it would probably take a while for the Laud to get down the River, I realized that I was going to catch her enter the channel. Oh well...with any luck, I might be able to catch her on the way back up.