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USGS Water-Year Summary 2024
02207160 STONE MOUNTAIN CREEK AT GA 24 NEAR LITHONIA, GA
LOCATION - Lat 33°46'23.8", long 84°04'37.8" referenced to North American Datum of 1983, Dekalb County, GA, Hydrologic Unit 03070103,
DRAINAGE AREA - 28.4 mi².
REVISIONS HISTORY - Discharge for the period Dec 23, 2015, to Dec. 25, 2015, was revised on May 21, 2019, based on changes to the stage-discharge rating.
SURFACE-WATER RECORDS
PERIOD OF RECORD - DISCHARGE: November 2013 to current year.
GAGE-HEIGHT: November 2013 to current year.
GAGE - Satellite telemetry with water-stage recorder and a continuous water-quality monitor. Datum of gage is 732.14 feet above NAVD88.
COOPERATION - DeKalb County Department of Watershed Protection.
REMARKS - Gage-height records are generally good. Discharge records are generally fair 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-ga_nwisweb_data_inquiries@usgs.gov.
EXTREMES FOR PERIOD OF RECORD - Maximum discharge, 2090 cfs, December 24, 2015; maximum gage-height, 10.08 feet, December 24, 2015; minimum daily discharge, 0.96 cfs, October 10, 2016.
CLIMATOLOGICAL RECORDS
PERIOD OF RECORD - November 2013 to current year.
INSTRUMENTATION - Tipping-bucket raingage.
WATER-QUALITY RECORDS
PERIOD OF RECORD - November 07, 2013 to current year.
PERIOD OF DAILY RECORD -
SPECIFIC CONDUCTANCE: November 2013 to current year.
pH: November 2013 to current year.
WATER TEMPERATURE: November 2013 to current year.
DISSOLVED OXYGEN: November 2013 to current year.
TURBIDITY: November 2013 to current year.
SPECIFIC CONDUCTANCE: November 2013 to current year.
pH: November 2013 to current year.
WATER TEMPERATURE: November 2013 to current year.
DISSOLVED OXYGEN: November 2013 to current year.
TURBIDITY: November 2013 to current year.
INSTRUMENTATION - Satellite telemetry with a continuous water-quality monitor.
REMARKS -
For period 10/01/2013-09/30/2015: Water temperature, specific conductance, and pH records are rated good. Dissolved oxygen record is rated fair. Turbidity record is rated poor.
For period 10/01/2015-09/30/2016: Water temperature, specific conductance, and pH records are rated good. Dissolved oxygen record is rated fair. Turbidity record is rated poor.
For period 10/01/2016-09/30/2017: Water temperature, specific conductance, and pH records are rated good. Dissolved oxygen record is rated fair. Turbidity record is rated poor.
For period 10/01/2017-09/30/2018: Water temperature, specific conductance, and pH records are rated good. Dissolved oxygen record is rated fair. Turbidity record is rated poor.
For period 10/01/2018-09/30/2019: Water temperature, specific conductance, and pH records are rated good. Dissolved oxygen record is rated fair. Turbidity record is rated poor.
Data for parameter code 63680 (turbidity) were collected using a probe with the following specifications: turbidity, water, monochrome near infra-red LED light, 780-900 nm, detection angle 90 +/-2.5 degrees, FNU (Formazin Nephelometric Units). Hydrologic event code of 9 indicates a routine sample while J designates a storm event sample. Laboratory chemical analyses are by RTI Laboratories, Livonia, MI. Laboratory sediment analyses are by the U.S. Geological Survey, Kentucky Sediment Laboratory. Field determinations of discharge, specific conductance, pH, water temperature, turbidity, barometric pressure, air temperature, microbioloigy, and dissolved oxygen are by the U.S. Geological Survey.
For period 10/01/2013-09/30/2015: Water temperature, specific conductance, and pH records are rated good. Dissolved oxygen record is rated fair. Turbidity record is rated poor.
For period 10/01/2015-09/30/2016: Water temperature, specific conductance, and pH records are rated good. Dissolved oxygen record is rated fair. Turbidity record is rated poor.
For period 10/01/2016-09/30/2017: Water temperature, specific conductance, and pH records are rated good. Dissolved oxygen record is rated fair. Turbidity record is rated poor.
For period 10/01/2017-09/30/2018: Water temperature, specific conductance, and pH records are rated good. Dissolved oxygen record is rated fair. Turbidity record is rated poor.
For period 10/01/2018-09/30/2019: Water temperature, specific conductance, and pH records are rated good. Dissolved oxygen record is rated fair. Turbidity record is rated poor.
Data for parameter code 63680 (turbidity) were collected using a probe with the following specifications: turbidity, water, monochrome near infra-red LED light, 780-900 nm, detection angle 90 +/-2.5 degrees, FNU (Formazin Nephelometric Units). Hydrologic event code of 9 indicates a routine sample while J designates a storm event sample. Laboratory chemical analyses are by RTI Laboratories, Livonia, MI. Laboratory sediment analyses are by the U.S. Geological Survey, Kentucky Sediment Laboratory. Field determinations of discharge, specific conductance, pH, water temperature, turbidity, barometric pressure, air temperature, microbioloigy, and dissolved oxygen are by the U.S. Geological Survey.
EXTREMES FOR PERIOD OF RECORD -
SPECIFIC CONDUCTANCE: Maximum, 238 microsiemens, July 14, 2022; minimum, 34 microsiemens, October 24, 2020, May 3, 2021.
pH: Maximum, 8.0 units, March 23, 2020; minimum, 6.2 units, August 9, 2017, February 11, 2018, April 19, 2019.
WATER TEMPERATURE: Maximum, 32.6°C, July 20, 2016, August 14, 2019, July 28, 2021; minimum, 1.7°C, January 30, 2014.
DISSOLVED OXYGEN: Maximum, 13.1 mg/L, December 26, 2022; minimum, 2.5 mg/L, October 4, 2016.
TURBIDITY: Maximum, 584 FNU, May 31, 2015; minimum, <0.5FNU, many days.
