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USGS Water-Year Summary 2024
02011500 BACK CREEK NEAR MOUNTAIN GROVE, VA
LOCATION - Lat 38°04'10", long 79°53'50" referenced to North American Datum of 1927, Bath County, VA, Hydrologic Unit 02080201, on left bank 0.3 mi downstream from Cummings Run, 0.8 mi downstream from bridge on State Highway 39, and 2.1 mi south of Mountain Grove.
DRAINAGE AREA - 134 mi².
REVISIONS HISTORY -
WSP 2104: Drainage area.
Revisions: Gage height and discharge for the period Aug. 8, 2017 to Oct. 3, 2017, were revised on Jan. 16, 2018, based on error in Peak Extremes for period.
SURFACE-WATER RECORDS
PERIOD OF RECORD - October 1951 to current year.
GAGE - Water-stage recorder. Datum of gage is 1,701.33 ft NAVD of 1988.
REMARKS - Flow regulated since October 1984 by Back Creek Lake 11.3 mi upstream, amount unknown, and since January 1985 by Little Back Creek Lake 14.4 mi upstream, amount unknown. Statistics of monthly mean data and summary statistics for water years 1952-1984 (unregulated flow) are available in previous data books, water years 1991-1998. Diversion 10.5 mi upstream from station by Virginia Power for recreation lakes, net averages 0.5 ft³/s. U.S. Army Corps of Engineers satellite water temperature and gage-height telemeter at station. Maximum discharge, 18,400 ft³/s, from rating curve extended above 14,000 ft³/s on basis of slope-area measurement of peak flow.
EXTREMES FOR PERIOD OF RECORD - Instantaneous low flow for period of regulation, 5.3 ft³/s, Dec. 30, 1998, result of freezeup.
EXTREMES FOR PERIOD PRIOR TO REGULATION - 1951-84: Maximum peak flow, 12,700 ft³/s, Mar. 7, 1967, gage height, 10.77 ft. Instantaneous low flow, 1.5 ft³/s, Aug. 18, 1967.
WATER-QUALITY RECORDS
PERIOD OF RECORD - Water years 1978 to current year.
PERIOD OF DAILY RECORD -
SPECIFIC CONDUCTANCE: January 2007 to September 2008.
WATER TEMPERATURE: June 1978 to current year.
SPECIFIC CONDUCTANCE: January 2007 to September 2008.
WATER TEMPERATURE: June 1978 to current year.
INSTRUMENTATION - Water temperature monitor. Electronic data logger with 60 minute recording interval.
EXTREMES FOR PERIOD OF DAILY RECORD -
SPECIFIC CONDUCTANCE: Maximum, 202 microsiemens/cm, Feb. 1, 2008, but may have been higher during periods of missing record; minimum, 76 microsiemens/cm, Apr. 15, 2007, but may have been lower during periods of missing record.
WATER TEMPERATURE: Maximum, 33.5°C, Aug. 14, 1988, but may have been higher during periods of missing record; minimum, 0.0°C, many days.
SPECIFIC CONDUCTANCE: Maximum, 202 microsiemens/cm, Feb. 1, 2008, but may have been higher during periods of missing record; minimum, 76 microsiemens/cm, Apr. 15, 2007, but may have been lower during periods of missing record.
WATER TEMPERATURE: Maximum, 33.5°C, Aug. 14, 1988, but may have been higher during periods of missing record; minimum, 0.0°C, many days.
