You will know you are approaching the falls when you see Annistown Road Bridge over the river. Most of the flow moves towards the right side of the river and then curves to the left as it spills over the five foot drop that is Annistown Falls. The best place to scout is from a big rock in the center of the river. Stopping on far river right is another location for scouting his drop, although there is some current there. You can portage from both of these locations. Take care exiting your boat, as the rocks are very slippery.
The two main lines for running the rapid are: running the main drop through the seam; or, boofing off the river right ledge. When scouting the falls, take notice of the following: Look for obstructions in the main flow of current, or below the ledge. There has been wood stuck in the falls in the past. If there is wood stuck in the drop, a portage should be mandatory. For running the main drop, check for visual cues upstream and downstream to line up for the main drop. You will not be able to figure out where you are until the last second, leaving very little time to make corrections. Notice the rocks to the right, left and bottom of the drop. Run the drop just slightly to the right of the main flow at the top to drop into the wave train below.
A word of caution: At high water, the center rock (for scouting) is covered and the river right eddy is gone.
Below the drop, there are eddies on river right and river left. After the drop, work your way to far river left as you go under the bridge. Be sure to be all the way river left as you go over the next drop, a 2 foot sluice, as you exit from under the bridge.
Work immediately to the left again to go over the last drop, Annistown wave/hole. This is a three foot drop that is almost river wide and pretty sticky at normal levels. Stay away from running this drop on river right due to a large rock immediately downstream.
---Description of "Annistown Falls" by Scott Houser