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- 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.
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USGS Water-Year Summary 2024
0205494935 ROANOKE RIVER AT JEFFERSON ST BRIDGE AT ROANOKE, VA
LOCATION - Lat 37°15'10", long 79°56'36" referenced to North American Datum of 1983, Roanoke City, VA, Hydrologic Unit 03010101, equipment is mounted on jersey wall, downstream side of bridge, near center of channel.
WATER-QUALITY RECORDS
PERIOD OF RECORD - November 2006 to November 2009.
PERIOD OF DAILY RECORD - November 2006 to November 2009.
INSTRUMENTATION - Water-quality monitor. Electronic data logger with 15-minute recording interval.
EXTREMES FOR PERIOD OF DAILY RECORD -
pH: Maximum, 8.8 standard units, Jan. 1, Feb. 1-5, 2009, but may have been higher during periods of missing record; minimum, 7.5 standard units, July 23, 2009, but may have been lower during periods of missing record.
SPECIFIC CONDUCTANCE: Maximum, 689 microseimens/cm, Feb. 1, 2008, but may have been higher during periods of missing record; minimum, 105 microseimens/cm, Apr. 3, 2009, but may have been lower during periods of missing record.
TURBIDITY: Maximum, 1,200 Formazin Nephelometric Units, May 15, 2009, but may have been higher during periods of missing record; minimum, 0.0 Formazin Nephelometric Units, many days.
WATER TEMPERATURE: Maximum, 30.0°C, Aug. 9, 10, 2007, but may have been higher during periods of missing record; minimum, -0.1°C, Feb. 6, 2007, but may have been lower during periods of missing record.
pH: Maximum, 8.8 standard units, Jan. 1, Feb. 1-5, 2009, but may have been higher during periods of missing record; minimum, 7.5 standard units, July 23, 2009, but may have been lower during periods of missing record.
SPECIFIC CONDUCTANCE: Maximum, 689 microseimens/cm, Feb. 1, 2008, but may have been higher during periods of missing record; minimum, 105 microseimens/cm, Apr. 3, 2009, but may have been lower during periods of missing record.
TURBIDITY: Maximum, 1,200 Formazin Nephelometric Units, May 15, 2009, but may have been higher during periods of missing record; minimum, 0.0 Formazin Nephelometric Units, many days.
WATER TEMPERATURE: Maximum, 30.0°C, Aug. 9, 10, 2007, but may have been higher during periods of missing record; minimum, -0.1°C, Feb. 6, 2007, but may have been lower during periods of missing record.
