24.7' - the river reaches record stage (1978), and results in major flooding of Cottonwood Campground. All area roads are submerged.
19' - the river reaches moderate flood stage, and begins flooding Cottonwood Campground. The river inundates the restrooms upstream at Santa Elena Canyon parking lot. The river begins to close all area roads.
15' - the river reaches minor flood stage, and lowland flooding begins. The river begins to flood the road between Santa Elena Canyon and Cottonwood Campground in Big Bend National Park. The river begins to flood the parking lot at Santa Elena Canyon, and cut off the nature trail into the canyon. Campers in Cottonwood Campground need to prepare for possible evacuations.
13' - the river reaches bankfull, and no significant damage is expected.