Piney River (Nelson County) - 1.) The "Big Piney" (Alhambra to VA. 827 ['Perkins Mill Rd'] Woodson) (VA)
400 to 450 is a good guide to minimum flow. The upper range of flow will, of course, vary depending on individual groups' skill level and disposition.
Put-in - Drive around 4 miles upstream from the take-out. You can park at the National Forest sign. We somtimes like to go slightly higher up and put in at the base of Shotgun rapid, which is the final big rapid on the class 5 South Fork section.