Ouachita River Stages & Forecasts Ouachita River at Camden [Source: National Weather Service] Ouachita River at Thatcher Lock & Dam [Source: National Weather Service] Ouachita River at Felsenthal Lock & Dam [Source: National Weather Service, U.S. Army Corps of Engineers] Ouachita River at Monroe [Source: National Weather Service, USGS] Ouachita River at Columbia Lock & Dam [Source: National Weather Service, U.S. Army Corps of Engineers]