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USGS Water-Year Summary 2024
03165500 NEW RIVER AT IVANHOE, VA
LOCATION - Lat 36°50'05", long 80°57'10" referenced to North American Datum of 1927, Wythe County, VA, Hydrologic Unit 05050001, on left bank at Ivanhoe, 2.1 mi downstream from Big Branch, and 2.3 mi upstream from Cripple Creek.
DRAINAGE AREA - 1,350 mi².
REVISIONS HISTORY - OFR 2006-1308: Drainage area.
SURFACE-WATER RECORDS
PERIOD OF RECORD - August to December 1927, October 1929 to September 1978, October 1978 to September 1982 (annual maximum only), February 1996 to present. Monthly discharge only for some periods, published in WSP 1305. Gage-height records collected in vicinity, October 1916 to July 1943, are contained in reports of the National Weather Service.
GAGE - Water-stage recorder. Datum of gage is 1,941.63 ft NAVD of 1988.
REMARKS - Large diurnal fluctuation and some regulation caused by powerplants at Buck 2.8 mi upstream and at Byllesby 5.5 mi upstream. Maximum discharge, 155,000 ft³/s, from rating curve extended above 32,000 ft³/s on basis of flood records for other stations on New River. Water-quality records for some prior periods have been collected at this location.
EXTREMES OUTSIDE PERIOD OF RECORD - Flood in July 1916 reached a stage of 34.8 ft, from floodmark, discharge, 132,000 ft³/s, from rating curve extended as explained above. Flood in September 1878 was about 5 ft lower than flood in July 1916 and was the highest known from 1840 to 1916.
