USGS Water-Year Summary for Site 02111000

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	Available Parameters
	00010 Temperature, water(Max.,Min.,Mean)
	00045 Precipitation(Sum)
	00060 Discharge(Max.,Min.,Mean)
	00065 Gage height(Max.,Min.,Mean)

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Water year 2023: 2022-10-01 to 2023-09-30

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USGS Water-Year Summary 2023

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).

REVISIONS HISTORY - WSP 1303: 1940(m), 1947-48(M). WSP 1553: 1948(P). WDR NC-80-1: 1975(P), drainage area. Gage datum was revised on October 01, 2021 based on an error in the determination of the gage datum

SURFACE-WATER RECORDS

PERIOD OF RECORD - October 1939 to current year. Monthly discharge only for some periods, published in WSP 1303.

GAGE - Data collection platform. Datum of gage is 1,211.30 ft above NAVD of 1988. Satellite telemetry at station.

REMARKS - Gage-height records are generally good. Discharge records are generally good except for estimated discharges, which are fair. Additional details on the accuracy of the records can be obtained by contacting the USGS South Atlantic Water Science Center at gs-w-nc_nwisweb_data_inquiries@usgs.gov.

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.

CLIMATOLOGICAL RECORDS

PERIOD OF RECORD - October 1999 to current year.

INSTRUMENTATION - Tipping-bucket raingage and electronic datalogger. Satellite telemetry at station.

REMARKS - Gage is operated in cooperation with U.S. Army Corps of Engineers, Wilmington District. Precipitation data collected during freezing periods may not be accurately reflected in daily record.

WATER-QUALITY RECORDS

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.

REMARKS - Independent field values of water temperature were collected during servicing of the temperature probe and are listed on the individual field sheets. All calibration data is on file in the Asheville Field Office and stored in USGS approved ‘Water-Quality Meter Calibration and Maintenance Logs’. The data are rated based on the criteria defined in the “Guidelines and Standard Procedures for Continuous Water- Quality Monitors: Station Operation, Record Computation, and Data Reporting Techniques and Methods 1-D3”, page 38.

EXTREMES FOR PERIOD OF DAILY RECORD - WATER TEMPERATURE: Maximum recorded, 27.6°C, July 27, 2016; minimum recorded, -0.1°C, periodically in winter months.