The Riverbar Drawdown Shore natural community occupies the “drawdown” zone, which is the narrow band of shoreline that lies between the high and low waterline of the river during a typical year. This zone is usually inundated with water during winter and spring, so this natural community develops in summer, peaking in late summer/early fall. But during especially wet years, it can be underwater nearly all the time. This narrow community—sometimes only 5 or 6 feet wide—can look nearly like a lawn, with its low, sometimes lush mats of mostly annual plants.