Linda From Maine wrote:
The crop is somewhat subtle, but I'm going with jaymatt about competition. The length of the river is nearly same as height of falls in the original, and the crop removes that aspect. A little imbalance helps stress the height of the falls. Excellent exercise, Larry!
For the record this is the second highest falls (215 feet) in the eastern US. Only Niagara is taller. In the end I guess it just comes down to the choice between grandeur or being intimate. What does the photographer want to convey. But I agree---it is an interesting exercise.