USGS Water-Year Summary 2022
10164500 AMERICAN FORK ABOVE UPPER POWERPLANT, NEAR AMERICAN FORK, UT
LOCATION - Lat 40°26'52", long 111°40'53" referenced to North American Datum of 1927, in SE 1/4 NW 1/4 NE 1/4 sec.26, T.4 S., R.2 E., Utah County, UT, Hydrologic Unit 16020201, on left bank 600 ft downstream from Rock Creek, 1,000 ft upstream from intake for upper power-plant of PacifiCorp, 4.0 mi upstream from mouth of canyon, and 6.7 mi northeast of American Fork.
DRAINAGE AREA - 51.1 mi².
- WSP 1634 Drainage area. WDR-UT-96-1: 1995.
PERIOD OF RECORD - January 1927 to September 2005, June 2, 2011 to current year. Monthly discharge only January 1927 to September 1945, published in WSP 1314. Prior to September 2005, records collected by PacifiCorp (formerly Utah Power & Light Co.) under general supervision of Geological Survey, in connection with a Federal Energy Regulatory Commission project.
GAGE - Water-stage recorder. Elevation of gage is 5,950 ft above NGVD of 1929, from topographic map. Prior to September 8, 1965, at same site at different datum. September 8, 1965 to November 20, 1967, at site 300 ft upstream.
EXTREMES FOR PERIOD OF RECORD - Maximum discharge not determined, occurred Jul. 30, 1953, gage height, 9.20 ft, from floodmark; minimum, 1.1 ft³/s, Dec. 20, 1976 (result of freezeup).