USGS Water-Year Summary 2018
11446220 American River below Folsom Dam, near Folsom, CA
LOCATION - Lat 38°42'16.3", long 121°09'51.7" referenced to North American Datum of 1983, in NW 1/4 SW 1/4 sec.24, T.10 N., R.7 E., Sacramento County, CA, Hydrologic Unit 18020111, on right bank, upstream of Folsom Lake Crossing bridge, 0.47 mi downstream from Folsom Dam, and 2.0 mi north of Folsom.
DRAINAGE AREA - 1,863 mi².
- WDR US-2010: Drainage Area.
PERIOD OF DAILY RECORD - October 1998 to current year.
WATER TEMPERATURE: October 1,1998 to October 16,2009, station was located just below the Folsom Dam spillway. October 2009 station was relocated approximately 1.5 miles downstream to accommodate spillway construction. February 29, 2017 sensor was destroyed by high flows during winter storms. May 9, 2017 station was relocated .42mi below the completed spillway per the contract with BOR.
INSTRUMENTATION - Water-temperature recorder.
EXTREMES FOR PERIOD OF DAILY RECORD - WATER TEMPERATURE: Maximum recorded, 22.7°C, Aug. 14, 2016; minimum recorded, 6.5°C, Feb. 9, 2002.