we live near the headwaters of the delaware, so most of it is canoeable and parts of it are the reservoirs for the nyc watershed. the jet drive is a lot more rock friendly than a prop. the screen will get clogged with moss and small stones, but it is easily cleared.
Yeah, during the flood last year they were using somebody's jet boat to ferry supplies across the river to an isolated neighborhood. There was just too much junk (logs, parts of buildings, dead cows...) floating down the river to use a prop. I wasn't involved in that because we were all stuck out here.
One of our neighbors who is a whitewater enthusiast used a kayak to rescue some papers from the house of another neighbor that was threatened. Turned out the water never got above the stem wall, but they didn't know that at the time.
