USGS Water-Year Summary 2024

02054500 ROANOKE RIVER AT LAFAYETTE, VA

LOCATION - Lat 37°14'11", long 80°12'34" referenced to North American Datum of 1927, Montgomery County, VA, Hydrologic Unit 03010101, on right bank 120 ft upstream from bridge on State Highway 626 (corrected) at Lafayette, 0.4 mi downstream from confluence of North and South Forks, and 1.1 mi upstream from Cove Hollow.

DRAINAGE AREA - 254 mi².

REVISIONS HISTORY - WSP 1333: 1944-47(M), 1948-49. OFR 2006-1308: Drainage area.

SURFACE-WATER RECORDS

PERIOD OF RECORD - September 1943 to current year.

GAGE - Water-stage recorder. Datum of gage is 1173.884±0.1ft above NAVD 88. Prior to July 30, 1949, nonrecording gage at present site and datum.

COOPERATION - Records were provided by the Virginia Department of Environmental Quality - Water Division.

REMARKS - Occasional diurnal fluctuation caused by meat-processing plant upstream from station. Virginia Department of Emergency Services gage-height radio transmitter at station. Maximum discharge, 24,500 ft³/s, from rating curve extended above 12,000 ft³/s on basis of slope-area measurement of peak flow. Water-quality records for some prior periods have been collected at this location.

EXTREMES OUTSIDE PERIOD OF RECORD - Flood in August 1940 reached a stage of 12.2 ft, from information by local residents, discharge, 19,000 ft³/s, from rating curve extended above 12,000 ft³/s.

EXTREMES FOR PERIOD OF RECORD - Instantaneous low flow, 8.0 ft³/s, Jan. 19, 1959, result of freezeup.