There is a sign at the bottom end of the channel past the bridge that says no wake for the next 2 miles. This is as you are looking up river going under the bridge at the bottom end of the channel.
It may be a shortcut going down/up river mileage wise, but going up river it will take a long time to go all the way through the channel bridge to bridge at no wake. No tall boats are making it under the bridge on the downstream side. Clearance on the upper bridge will depend on water levels.