Did you ever watch "The Hunt for Monster Bass" with pro angler Ott DeFoe? His shallow boat is a 1740 Tracker Jon boat, (He's sponsored by Bass Pro), single console, equipped with a 65 horse Mercury jet outboard. He's had it modified with a hydraulic jack plate on the transom where he can raise it up and still keep the pump working. There was one series where he fished the Upper Mississippi in Minnesota for monster smallmouths, and aerial camera shots, (either from drone or chopper) showed him blasting up the river and you could easily see the bottom as he was mostly in 12" to 18" of water and he wasn't the least bit concerned. (Of course, if he takes out a lower end, I'm reasonably certain he can afford a new drive unit).
Last year, I talked to a guy down at the Freeport launch who has two boats, one of which is a jet. He said he's been up the Kiski river and caught some huge walleyes up past Leechburg. I know there's places that only has about a foot of water on the way up there from the Allegheny.