Travel further north, and you will cross the Little River Reservoir. The Eno, the Little, and the Flat Rivers combine to form the Neuse just to the east on the former plantation of the Bennehans (Stagville) and Camerons (Fairntosh). Stagville is now a NC State Historical Site, which you can visit.
Travel further north still until you come to Quail Roost on your left, turn right onto Moore's Mill Road. This road also runs north-south and parallels US 501. You will cross Red Mountain Road and continue north and pass into Person County where the road begins to parallel the Flat River and is subject to flooding when the Flat rises out of its banks. Then you will cross the river on a bridge, and the original Moore's Mill site is just to your left, but there are currently no remains. In 1976, the Durham Morning Herald did a wonderful article on the mills of Flat River with photos by Harold Moore. Here are copies of those photos.