USGS Water-Year Summary 2017
02146300 IRWIN CREEK NEAR CHARLOTTE, NC
LOCATION - Lat 35°11'52", long 80°54'16" referenced to North American Datum of 1983, Mecklenburg County, NC, Hydrologic Unit 03050103, on left bank, 2,200 ft upstream from Southern Railway bridge, 0.7 mi upstream from Taggart Creek, and 4.2 mi southwest of city hall, Charlotte.
DRAINAGE AREA - 30.7 mi².
PERIOD OF RECORD - May 1962 to current year. Prior to October 1963, published as "Sugar (Irwin) Creek at Charlotte".
REVISED RECORDS - WDR NC-80-1: Drainage area.
GAGE - Water-stage recorder. Datum of gage is 590.87 ft above North American Vertical Datum of 1988. Radio telemetry at streamgage.
EXTREMES OUTSIDE PERIOD OF RECORD - Flood of April 6, 1936, reached a stage of about 17.3 ft at site 400 ft downstream, from information by plant employee. Peak may have been affected by failure of Lakewood Dam, 5 mi upstream. Flood of January 6, 1962, reached a stage of 14.32 ft, from floodmarks; discharge, 4,120 ft³/s. Flood of April 11, 1962, reached a stage of 15.18 ft, from floodmarks; discharge, 4,740 ft³/s, on basis of slope-area measurement of peak flow.
EXTREMES FOR PERIOD OF RECORD - Maximum discharge for period of record, 11,600 ft³/s, July 23, 1997, from rating curve extended above 7,500 ft³/s on basis of step-backwater computation.