Approximate - nearest available gauge. Use as general reference only.
Scout the falls, then choose whether to put in above or below the falls.
There are 3 possible lines. At high water you can run off the left side of the falls, and at low levels you can start center and move left. (You do not want to run the down the center of the drop or you will find a nasty hole waiting to rip you out of you boat!) Or try the river right line by hugging the bank right at the lip. Missing the line could result in some carnage.