USGS Water-Year Summary for Site 02071900

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	Available Parameters
	00021 Temperature, air(Max.,Min.)
	00045 Precipitation(Sum)
	62614 Elevation, lake/res, NGVD29(Max.,Mean,Min.)

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Water year 2023: 2022-10-01 to 2023-09-30

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USGS Water-Year Summary 2023

02071900 PHILPOTT LAKE NEAR PHILPOTT, VA

LOCATION - Lat 36°46'52", long 80°01'40" referenced to North American Datum of 1927, Henry County, VA, Hydrologic Unit 03010103, at Philpott Dam on Smith River, 1.5 mi west of Philpott, 12.0 mi upstream from Reed Creek, and at mile 44.3.

DRAINAGE AREA - 214 mi².

REVISIONS HISTORY - Revisions: Precipitation data for July 13, 2022 was revised on Jan. 27, 2023, based on errors found in processing.

SURFACE-WATER RECORDS

PERIOD OF RECORD -

Lake elevation (NDVD29) is published from March 2003 to current year.

Records August 1950 to September 2002 supplied by the U.S. Army Corps of Engineers.

GAGE - Water-stage recorder. Datum of gage is 0.00 ft NGVD of 1929.

REMARKS - Reservoir is formed by concrete dam. Spillway, with crest at elevation 985 ft, is ungated and 120 ft long. Storage began August 1950 during construction; initial filling started in December 1951; water in reservoir first reached rule-curve elevation in July 1953. Total capacity at maximum flood-control pool elevation, 998 ft, is 247,400 acre-ft of which 47,000 acre-ft is above the spillway crest; 34,200 acre-ft is controlled flood storage between elevations 974 ft, maximum power pool, and 985 ft; 57,800 acre-ft is available for power between elevations 951 ft, minimum power pool, and 974 ft; and 108,400 acre-ft is inactive and dead storage below elevation 951 ft. Usable capacity is 92,000 acre-ft between elevations 951 ft and 985 ft. Figures given herein represent total contents. Reservoir is used for flood control, hydroelectric power, water supply, low-water regulation for pollution abatement and industrial water supply, and recreation.

EXTREMES FOR PERIOD OF RECORD -

For Water Years 1950-2002: Maximum contents, 191,700 acre-ft, June 22, 1972, elevation, 983.06 ft; minimum (after first filling to rule curve), 64,540 acre-ft, Sept. 26, 1956, elevation, 927.59 ft. As supplied by U.S. Army Corps of Engineers.

For March 28, 2003 to current year- Maximum elevation, 985.31 ft, May 22, 2020. Minimum elevation: 959.38 ft Nov. 9, 2012.

CLIMATOLOGICAL RECORDS

PERIOD OF RECORD -
AIR TEMPERATURE: April 2011 to current year.
PRECIPITATION: April 2010 to current year. Unpublished records available April 2010 to September 2011 in files of the USGS.

INSTRUMENTATION - Electronic data logger with a 15-minute record interval. Tipping bucket rain gage and air temperature monitor.

EXTREMES FOR PERIOD OF RECORD -
AIR TEMPERATURE: Maximum, 104°F, June 29, 2012; minimum, 5.7°F, Feb. 20, 2015.
PRECIPITION: October 2011 to current year. Maximum daily precipitation, 4.56 in., 05/24/2020.