USGS Water-Year Summary 2024

02056000 ROANOKE RIVER AT NIAGARA, VA

LOCATION - Lat 37°15'18", long 79°52'18" referenced to North American Datum of 1927, Roanoke County, VA, Hydrologic Unit 03010101,

on right bank 200 ft downstream from power plant of American Electric Power at Niagara, 2 mi downstream from Tinker Creek, 2.1 mi southeast of Vinton, and at mile 355.3.

 

 

DRAINAGE AREA - 509 mi².

REVISIONS HISTORY - WSP 972: 1927(M), 1929(M), 1934(M), 1937(M). WSP 1303: 1928, 1930, 1933-38, 1940. WDR VA-72-1: 1928(M), 1930(M), 1933(M), 1935-36(M), 1938(M), 1940, 1944-45(M), 1948-49(M), 1951(M), 1955(M), 1960(M), 1967(M), 1969(M). OFR 2006-1308: Drainage area.

SURFACE-WATER RECORDS

PERIOD OF RECORD - October 1926 to current year.

GAGE - Water-stage recorder. Datum of gage is 819.7 ft, NAVD88.

REMARKS - Flow regulated by dam and power plant 200 ft upstream from station. Maximum discharge, 52,300 ft³/s, from rating curve extended above 12,000 ft³/s on basis of slope-area measurements at gage heights 18.98 ft and 25.30 ft.

WATER-QUALITY RECORDS

PERIOD OF RECORD - November 2006 to June 2009.

PERIOD OF DAILY RECORD - March 2007 to June 2009.

INSTRUMENTATION - Specific conductance and water temperature monitor. Electronic data logger with 15-minute recording interval.

EXTREMES FOR PERIOD OF DAILY RECORD -
SPECIFIC CONDUCTANCE: Maximum, 860 microseimens/cm, Mar. 3, 2009; minimum, 166 microseimens/cm, Apr. 28, 2008.
WATER TEMPERATURE: Maximum, 28.6°C, Aug. 10, 2007; minimum, 1.3°C, Jan. 17, 2009.