USGS Water-Year Summary 2023
02204037 POLE BRIDGE CR AT EVANS MILL RD NEAR LITHONIA, GA
LOCATION - Lat 33°40'05.5", long 84°09'04.2" referenced to North American Datum of 1983, Dekalb County, GA, Hydrologic Unit 03070103,
DRAINAGE AREA - 16.1 mi².
REVISIONS HISTORY - Discharge for the period Aug. 24, 2019, to Aug. 30, 2019, was revised on Mar. 20, 2020, based on changes to the estimated discharge.
SURFACE-WATER RECORDS
PERIOD OF RECORD -
DISCHARGE: May 2012 to current year.
GAGE-HEIGHT: May 2012 to current year.
GAGE - --Satellite telemetry with water-stage recorder. Datum of gage is 721.32 feet above NAVD88.
COOPERATION - DeKalb County Department of Watershed Protection.
EXTREMES FOR PERIOD OF RECORD - Maximum discharge, 1,320 cfs, estimated, April 19, 2019; maximum gage-height, unknown, April 19, 2019; minimum daily discharge, 0.10 cfs, July 2, 3, 2012.
CLIMATOLOGICAL RECORDS
PERIOD OF RECORD - May 2012 to current year.
INSTRUMENTATION - Tipping-bucket rain gage.
WATER-QUALITY RECORDS
PERIOD OF RECORD - November 2012 to current year.
PERIOD OF DAILY RECORD -
SPECIFIC CONDUCTANCE: November 2012 to current year.
pH: November 2012 to current year.
WATER TEMPERATURE: November 2012 to current year.
DISSOLVED OXYGEN: November 2012 to current year.
TURBIDITY: November 2012 to current year.
INSTRUMENTATION - Satellite telemetry, a continuous water-quality monitor, and an automated refrigerated sampler.
EXTREMES FOR PERIOD OF RECORD -
SPECIFIC CONDUCTANCE: Maximum, 220 microsiemens, February 13, 2014; minimum, 21 microsiemens, August 11, 2017.
pH: Maximum, 7.9 units, November 15, 2012; minimum, 5.8 units, April 19, 2019.
WATER TEMPERATURE: Maximum, 28.5°C, June 17, 2022; minimum, 0.3°C, January 30, 2014.
DISSOLVED OXYGEN: Maximum, 13.6 mg/L, January 30, 2014; minimum, 4.1 mg/L, July 14-17, 2014.
TURBIDITY: Maximum, 822 FNU, December 20, 2017; minimum, 0.7 FNU, June 13, 14, 2016.