That came out very nicely! Well done. 
I used tempered glass and a painted wood base beneath it for Panhandle 1.
The problem with this technique is that the glass is heavy and unwieldy and can scratch your painted river bottom.
For Panhandle 2, I tried something different. I used a mix and pour product called Woodland Scenics Deep Pour Water. It comes in both Clear and Murky. I used the Murky version to pour my 8' wide Ohio River (~2400 square inches). That took a lot of boxes of the stuff but it came out beautifully. And it's a lot less hassle than the glass method.
George
