USGS Water-Year Summary 2018
09413500 VIRGIN RIVER NEAR ST. GEORGE, UT
LOCATION - Lat 37°00'52", long 113°40'47" referenced to North American Datum of 1927, in NW 1/4 NE 1/4 SE 1/4 sec.30, T.43 S., R.16 W., Washington County, UT, Hydrologic Unit 15010010, Bureau of Land Management, on right bank immediately upstream from Beaver Dam Mountains Wilderness Area, and 8.0 mi southwest of St. George.
DRAINAGE AREA - 4,123 mi².
- WDR UT-92-1: Drainage area.
PERIOD OF RECORD - October 1950 to December 1956, October 1991 to current year.
GAGE - Water-stage recorder, crest-stage gage and concrete control. Elevation of gage is 2,400 ft above NGVD of 1929, from topographic map. October 1950 to December 1956, about 400 ft downstream at different datum. October 1991 to November 2009, 200 ft downstream at same datum.
EXTREMES OUTSIDE PERIOD OF RECORD - Maximum discharge, 60,000 ft³/s (estimated), Jan 1, 1989, gage height, about 30.0 ft, result of Quail Creek reservoir dike failure.
EXTREMES FOR PERIOD OF RECORD - Maximum discharge, 25,100 ft³/s, Dec 21, 2010, gage height 20.98 ft, from flood marks; no flow at times in some years.