USGS Water-Year Summary 2017
02111000 YADKIN RIVER AT PATTERSON, NC
LOCATION - Lat 35°59'27", long 81°33'30" referenced to North American Datum of 1983, Caldwell County, NC, Hydrologic Unit 03040101, Lat 35 59'27", long 81 33'30", Caldwell County, Hydrologic Unit 03040101, on left bank 150 ft upstream from bridge on State Highway 268, 0.4 mi upstream from Warrior Creek, 0.5 mi south of Patterson, and 2 mi downstream from Walnut Branch.
DRAINAGE AREA - 28.8 mi², 28.8 mi² (measured on USGS topographic maps).
PERIOD OF RECORD - October 1939 to current year. Monthly discharge only for some periods, published in WSP 1303.
REVISED RECORDS - WSP 1303: 1940(m), 1947-48(M). WSP 1553: 1948(P). WDR NC-80-1: 1975(P), drainage area.
GAGE - Water-stage recorder. Datum of gage is 1,211.47 ft above National Geodetic Vertical Datum of 1929. Prior to February 9, 1940, nonrecording gage at present site, at datum 1,212.47 ft. February 9, 1940, to October 20, 1970, recording gage at present site, at datum 1,212.47 ft. Satellite telemetry at station.
EXTREMES FOR PERIOD OF RECORD - Maximum discharge from rating curve extended above 1,400 ft³/s on basis of computation of peak flow over dam 1 mi upstream at gage heights 4.58, 6.60, 7.70, and 12.70 ft.
PERIOD OF RECORD - October 1999 to current year.
INSTRUMENTATION - Tipping-bucket raingage and electronic datalogger. Tipping bucket heated from October through April. Satellite telemetry at station.
PERIOD OF RECORD - November 2012 to current year.
PERIOD OF DAILY RECORD - WATER TEMPERATURE: November 2012 to current year.
INSTRUMENTATION - Temperature probe since November 2012. Satellite telemetry at station.
EXTREMES FOR PERIOD OF DAILY RECORD - WATER TEMPERATURE: Maximum recorded, 25.7°C, July 02, 2014; minimum recorded, -0.1°C, several days in January 2014.