USGS Water-Year Summary 2018
02335757 BIG CREEK BELOW HOG WALLOW CREEK, AT ROSWELL, GA
LOCATION - Lat 34°01'03", long 84°21'12" referenced to North American Datum of 1983, Fulton County, GA, Hydrologic Unit 03130001, on upstream left side of footbridge on Oxbo Road, 0.5 miles downstream from Grimes Bridge Road.
DRAINAGE AREA - 103 mi².
PERIOD OF RECORD -
DISCHARGE: March 2004 to current year.
GAGE HEIGHT: March 2004 to current year.
GAGE - Satellite telemetry with a water-stage recorder. Datum of gage is 940.00 feet above National Geodetic Vertical Datum (NGVD) of 1929 (from topographic map).
COOPERATION - City of Roswell; Georgia Department of Natural Resources, Environmental Protection Division.
EXTREMES FOR PERIOD OF RECORD - Maximum discharge recorded, 6,240 cfs, September 21, 2009; maximum gage-height recorded, 15.24 feet, September 21, 2009; minimum daily discharge, 6.3 cfs, estimated, September 30, 2007.