Click
to
hide
Water-Year
Summary
instructions
and
information
- Water-Year Summary reports summarize a year of hydrologic data in a printer-friendly format.
- For water years 2014 onward, choose a water year and parameter and an on-demand Water-Year Summary report will be generated.
- For water years 2006 through 2013, choose a water year and an Annual Water Data Report will be provided.
- For water years 2005 and earlier, Annual Water Data Reports may be available in digital format.
- Not all sites have reports available for every water year.
USGS Water-Year Summary 2024
02101726 ROCKY RIVER AT US HIGHWAY 64 NEAR SILER CITY, NC
LOCATION - Lat 35°44'06", long 79°25'24" referenced to North American Datum of 1927, Chatham County, NC, Hydrologic Unit 03030003, on U.S. Highway 64, 1.6 mi east of Siler City.
DRAINAGE AREA - 68.7 mi².
SURFACE-WATER RECORDS
PERIOD OF RECORD - February 2009 to current year.
GAGE - Water-stage recorder. Datum of gage is 482.9 ft above NAVD88 NAD83(2011) Geoid 18. Satellite telemetry at streamgage.
REMARKS - Gage-height records are generally good. Discharge records are generally good except for estimated discharges, which are poor. 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 14,000 ft³/s, September 17, 2018; Maximum gage height 24.90 ft, September 17, 2018, as a result of Hurricane Florence. Minimum daily mean discharge: 0.13 ft³/s, August 21, 2017.
WATER-QUALITY RECORDS
EXTREMES FOR PERIOD OF DAILY RECORD -
SPECIFIC CONDUCTANCE: Maximum recorded, 178 microsiemens, January 23, 2018; minimum recorded, 22 microsiemens, April 21, 2014.
pH: Maximum recorded, 8.3 standard units, April 7, 2021; minimum recorded, 5.8 standard units, June 20, 21, 22, 24, 25, 2010.
WATER TEMPERATURE: Maximum recorded, 32.2°C, July 15, 17, 2019; minimum recorded, 1.3°C, February 14, 2014.
DISSOLVED OXYGEN: Maximum recorded, 14.1 mg/L, March 3, 2009; minimum recorded, 0.1, August 14, 2010.
DISSOLVED OXYGEN, PERCENT SATURATION: Maximum recorded, 119%, June 19, 2009, October 1, 2010; minimum recorded, 1%, August 14, 2010.
SPECIFIC CONDUCTANCE: Maximum recorded, 178 microsiemens, January 23, 2018; minimum recorded, 22 microsiemens, April 21, 2014.
pH: Maximum recorded, 8.3 standard units, April 7, 2021; minimum recorded, 5.8 standard units, June 20, 21, 22, 24, 25, 2010.
WATER TEMPERATURE: Maximum recorded, 32.2°C, July 15, 17, 2019; minimum recorded, 1.3°C, February 14, 2014.
DISSOLVED OXYGEN: Maximum recorded, 14.1 mg/L, March 3, 2009; minimum recorded, 0.1, August 14, 2010.
DISSOLVED OXYGEN, PERCENT SATURATION: Maximum recorded, 119%, June 19, 2009, October 1, 2010; minimum recorded, 1%, August 14, 2010.
