The first step is to know if your box floats or sinks. I converted everything in MKSA standard, aka metric units, the only way to make physics ;-) :
Your box weights 204 kg for a volume of 0.111 m3. So your box has twice the density of water : it sinks like a stone.
Then Archimede's law says a force of 111 kg, a bit more than half of your box weight pushes it upwards, which lets 204-111 = 93 kg of apparent weight in water.
Now you need to know the friction of your box with the river bottom, and the speed water to know if it is strong enough to move or roll the box in the current. I can make a calculation with a CFD software, but you'd have to pay for it ;-)