Instrumental Record of 'Naturalized' Colorado River Flow at Lees Ferry Near Page, Arizona

Instrumental Record of 'Naturalized' Colorado River Flow at Lees Ferry Near Page, Arizona: Instrumental record of Colorado River streamflows. The naturalized flow of the Colorado River has varied between 5.3 and 24.0 million acre-feet per year at Lees Ferry near Page, Arizona. Naturalized flow is an estimate of the River's flow that would occur in absence of human diversions or withdrawals. One acre-foot is equal to approximately 326,000 gallons.

Credit: Data obtained from the U.S. Bureau of Reclamation. http://www.usbr.gov/