USGS Water-Year Summary for Site 02087182

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	Available Parameters
	00010 Temperature, water(Max.,Min.,Mean)
	00045 Precipitation(Sum)
	00065 Gage height(Max.,Min.,Mean)

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Water year 2020: 2019-10-01 to 2020-09-30

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USGS Water-Year Summary 2020

02087182 FALLS LAKE ABOVE DAM NEAR FALLS, NC

LOCATION - Lat 35°56'28", long 78°35'00" referenced to North American Datum of 1983, Wake County, NC, Hydrologic Unit 03020201, on intake tower 50 ft upstream from Falls Lake dam, and 0.3 mi northwest of Falls and 235 mi upstream from mouth.

DRAINAGE AREA - 771 mi².

SURFACE-WATER RECORDS

PERIOD OF RECORD - February 1979 to current year.

GAGE - Water-stage recorder. Datum of gage is National Geodetic Vertical Datum of 1929. U.S. Army Corps of Engineers satellite telemetry at streamgage.

COOPERATION - Gage is operated in cooperation with the U.S. Army Corps of Engineers.

REMARKS -

Falls Lake is used for flood control, water supply, low-flow agumentation, and recreation. Temporary filling began May 1981 as water supply for city of Raleigh during drought conditions. Gates were closed on January 13, 1983 and normal pool elevation of 250.1 ft was recorded December 7, 1983. Total capacity of reservoir is 4,998,074,000 ft³ at elevation of 250.1 ft. Extremes for period of record provided by U.S. Army Corps of Engineers.

For the 2015 Water Year: Records good.
For the 2016 Water Year: Records good.

For the 2017 Water Year: Records good.

EXTREMES FOR PERIOD OF RECORD - Maximum elevation, 264.34 ft, October 1, 2, 1999; minimum elevation, 241.52 ft, December 26, 2007.

CLIMATOLOGICAL RECORDS

PERIOD OF RECORD - October 1998 to current year.

INSTRUMENTATION - Data collection platform (DCP) and heated tipping bucket rain gage collecting data at a 15-minute interval. The DCP is housed in a 6 ft by 6 ft walk-in shelter located on the intake tower 300 ft upstream from the dam. The shelter has reinforced concrete walls, a steel access door, and is maintained by the COE. The heated tipping bucket rain gage is located on the intake tower 20 ft from the walk-in shelter.

REMARKS - Precipitation data collected during freezing periods may not be accurately reflected in daily record. A heated rain gage was installed on March, 4 2013.

WATER-QUALITY RECORDS

PERIOD OF RECORD - WATER TEMPERATURE: September 2009 to current year.

PERIOD OF DAILY RECORD - WATER TEMPERATURE: September 2009 to current year.

INSTRUMENTATION - Design Analysis Associates (DAA) model H-522 data collection platform (DCP) and DAA temperature sensor. Thermometer probe suspended 1.5 feet below the water surface attached to a float on a pulley system that allows the probe to fluctuate with water levels. The assembly is mounted on the north east side of the water intake towers at the dam. Since 2009.

REMARKS -

For the 2015 Water Year: Records fair.
For the 2016 Water Year: Records Good.

EXTREMES FOR PERIOD OF DAILY RECORD - WATER TEMPERATURE:For current configuration of temperature probe and location from September 3, 2009 to September 30, 2016 Maximum recorded, 35.1°C, June 15, 2010 and July 24, 2016; minimum recorded, 2.0°C, January 10, 2010.