The water-quality reconnaissance of the San Rafael River basin, Utah, encompassed an area of about 2,300 square miles (5,960 square kilometers). Data were obtained by the U.S. Geological Survey one or more times at 116 sites from June 1977 to September 1978. At 19 other sites visited during the same period, the streams were dry. Precipitation and stream discharge were significantly less then normal during 1977 and ranged from less than to more than normal during 1978.
United States Geological Survey, "Reconnaissance of the Quality of Surface Water in the San Rafael River Basin, Utah" (1980). All U.S. Government Documents (Utah Regional Depository). Paper 100.