It's an overturned livestock water tank. I don't see how it's going to be a pin or flip hazard for anyone unless it moves at high water. It's bright blue, tough to miss visually.
Tank Rapid, class 2+
The obstacle to be aware of is a large tree over the river in Poudre Park. River left, tough to miss visually.
1 ft on the guage this morning.
Dude, I'd see you on the river but I'm hardly ever out there.