One of the more interesting sluice-gates I think I've seen.
Controlling the Canadian River's water level
in the Stinchcomb Wildlife Refuge.
There was good water level in the lower reaches of the river,
but you could see where it had dropped about 3 ft. since the last heavy rain.
By the time we were about 4 miles up the river, the sand banks and
log jams got much larger and the water much shallower.