USGS Water-Year Summary 2020
02208050 ALCOVY RIVER NEAR LAWRENCEVILLE, GA
LOCATION - Lat 33°58'42.8", long 83°56'21.0" referenced to North American Datum of 1983, Gwinnett County, GA, Hydrologic Unit 03070103, at bridge on US 29, 3.2 miles northeast of Lawrenceville.
DRAINAGE AREA - 9.97 mi².
PERIOD OF RECORD -
DISCHARGE: Water Years 1965 to 1974, 1995 to 2003 (annual maximum only); October 2005 to October 2015.
GAGE-HEIGHT: Water Years 1965 to 1974, 1995 to 2003 (annual maximum only); October 2003 to current year.
GAGE - Satellite telemetry with water-stage recorder. Datum of gage is 920 feet above National Geodetic Vertical Datum (NGVD) of 1929 (from topographic map). Prior to April 23, 2003, station was operated as a crest-stage partial-record station at same location and different datum.
COOPERATION - Gwinnett County Department of Water Resources.
EXTREMES FOR PERIOD OF RECORD - Maximum discharge recorded, 2,200 cfs, estimated from rating curve extended above 920 cfs based on drainage area comparison, September 21, 2009; maximum gage-height recorded, 8.29 feet, September 21, 2009; minimum daily discharge, 0.26 cfs, October 17, 2011.
PERIOD OF RECORD - April 2003 to current year.
INSTRUMENTATION - Tipping-bucket raingage.