Cottonwood trees grow along streams and moist areas at elevations from 150 to 6,000 feet and are used by beavers for food and damn-building. Traditionally, cottonwood leaves are boiled and placed on sprains, bruises, and broken bones to reduce swelled. Further, cottonwood leaves can be boiled and used as medicine to clean the eyes. This tree also commonly used to make raised platforms and to protect food stores from animals and flooding.