USGS Water-Year Summary for Site USGS 03408500

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	00060 Discharge(Mean)

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Water year 2024: 2023-10-01 to 2024-09-30

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USGS Water-Year Summary 2024

03408500 NEW RIVER AT NEW RIVER, TN

LOCATION - Lat 36°23'07.58", long 84°33'17.20" referenced to North American Datum of 1927, Scott County, TN, Hydrologic Unit 05130104, on left bank at town of New River, 700 ft downstream from Phillips Creek, 1,000 ft downstream from bridge on U.S. Highway 27, 1.7 mi downstream from Brimstone Creek, and at mile 8.6.

DRAINAGE AREA - 382 mi².

REVISIONS HISTORY - WSP 1436: Drainage area. WDR TN-73: 1939(M), 1951(M), 1970(M).

SURFACE-WATER RECORDS

PERIOD OF RECORD - Discharge records available August 1934 to September 1991, October 1998 to present. Stage only records available October 1991 to September 1998. Nearby gage height records are available in U.S. Weather Bureau reports from 1908 to 1952.

GAGE -

Data Collection Platform.

Datum of gage is 1092.01 ft above NAVD of 1988, (Reference Frame NAD_83 (2011) (EPOCH:2010.0000) GEOID18).

Prior to June 17, 2024, the datum of gage was 1092.43 ft above NGVD of 1929.

Prior to February 2021 the datum of gage was assumed to be 1,092.224 ft (NAVD 88). Datum elevation determined using the NOAA National Geodetic Survey "Vertcon" model, which adjusted the previous datum elevation of 1,092.67 ft (NGVD 1929) by -0.446 ft. to 1,092.224 (NAVD 88). Historic U.S. Weather Bureau gages were set at datum 3.41 ft higher than the current datum. However, neither of these elevations were entered into the Monitor Location Registry.

From December 1999 to February 2021 the datum of gage was 1096.08 ft above NGVD of 1929.

EXTREMES OUTSIDE PERIOD OF RECORD - Maximum discharge, 74,700 ft³/s (estimated), Mar. 23, 1929, gage height, 41.20 ft (based on field survey at old U.S. Weather Bureau gage located 1,200 ft upstream with a different datum, which was 3.41 ft higher).

EXTREMES FOR PERIOD OF RECORD - Maximum discharge, 63,700 ft³/s, May 27, 1973, gage height, 37.91 ft (from high water mark in well, computed using a rating extension above 27,000 ft³/s, based on slope-area and contracted-opening indirect measurements); no flow, August 12-15, 1944.