USGS Water-Year Summary 2017
02054530 ROANOKE RIVER AT GLENVAR, VA
LOCATION - Lat 37°16'04", long 80°08'23" referenced to North American Datum of 1927, Roanoke County, VA, Hydrologic Unit 03010101, on left bank 150 ft downstream from bridge on State Highway 1154(Cunningham Drive), 0.2 mi downstream from mouth of Callahan Branch, 0.3 mi south of Glenvar, and 2.5 mi upstream from mouth of Mill Creek.
DRAINAGE AREA - 281 mi².
PERIOD OF RECORD - December 1991 to current year.
REVISED RECORDS - OFR 2006-1308: Drainage area.
GAGE - Water-stage recorder. Datum of gage is 1,100 ft NGVD of 1929, from topographic map.
COOPERATION - Records were provided by the Virginia Department of Environmental Quality - Water Division.
EXTREMES OUTSIDE PERIOD OF RECORD - Flood of June 21, 1972, reached a stage of about 20.2 ft, from information by local resident, discharge, about 25,000 ft³/s, from rating curve extended above 10,900 ft³/s.