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Water-Year Summary for Site 0205491522

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  • Water-Year Summary reports summarize a year of hydrologic data in a printer-friendly format.
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Available Parameters
00010 Temperature, water(Med.)  
00095 Specific cond at 25C(Med.)  
00400 pH(Med.)  
63680 Turbidity, Form Neph(Med.)  

Water year 2023: 2022-10-01 to 2023-09-30
 
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USGS Water-Year Summary 2023
0205491522 ROANOKE RIVER AT BRIDGE STREET BRIDGE AT ROANOKE, VA
LOCATION - Lat 37°16'29", long 79°58'49" referenced to North American Datum of 1927, Roanoke City, VA, Hydrologic Unit 03010101, equipment is mounted on bridge rail, downstream side of bridge, near center of channel.
DRAINAGE AREA - 371 mi².
WATER-QUALITY RECORDS
PERIOD OF RECORD - October 2008 to current year.
PERIOD OF DAILY RECORD - October 2008 to October 2011.
INSTRUMENTATION - Water-quality monitor. Electronic data logger with 15-minute recording interval.
EXTREMES FOR PERIOD OF DAILY RECORD -
pH: Maximum, 9.1 standard units, several days, 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, 588 microseimens/cm, Mar. 2, 2009, but may have been higher during periods of missing record; Minimum, 31 microseimens/cm, Sept. 27, 2009, but may have been lower during periods of missing record.
TURBIDITY: Maximum, 1,710 Formazin Nephelometric Units, May 29, 2010, but may have been higher during periods of missing record; Minimum, 0.1 Formazin Nephelometric Units, Nov. 23, 2009, but may have been lower during periods of missing record.
WATER TEMPERATURE: Maximum, 30.0 °C, July 24, 2010, but may have been higher during periods of missing record; Minimum, -0.5 °C, Feb. 18, 2010, but may be lower during periods of missing record.