Calling this a waterfall is a bit of a stretch but this is a river in the Triangle.
Three Foot Falls is on far river right and provides a drop of about three feet into a pool. At lower levels there is only one channel. At medium levels there is a left channel and a right slot. At higher levels these merge into a single channel.
At any rate, line up your boat roughly parallel to the current and get a little more speed than the current and enjoy! One of the few good spots on the river to practice Boofing.
At lower levels you can sidesurf the main channel or try to get enders. At medium levels the smaller slot is good for the same. At high water you can still play in the curtain but beware as it gets really sticky. At flood this drop becomes a monster hole!