Tellico - 2. Bridge above Bald River to bridge below Jared's Knee (TN)
It can be run lower than this, but it gets scrapy and it's not the same river as at the "normal" levels.
Middle Ledge (III) is an eight-foot plunge with an automatic boof if run towards river right. At normal water levels, there is plenty of calm water between Dirty S and this drop, so it shouldn't surprise you.