USGS Water-Year Summary for Site 021474095

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	Available Parameters
	00010 Temperature, water(Max.,Min.,Mean)
	00065 Gage height(Mean)
	00300 Dissolved oxygen(Max.,Min.,Mean)

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Water year 2024: 2024-10-01 to 2025-09-30

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USGS Water-Year Summary 2024

021474095 GREAT FALLS RESERVOIR TAILRACE AT GREAT FALLS,SC

LOCATION - Lat 34°33'28.2", long 80°53'36.1" referenced to North American Datum of 1927, Chester County, SC, Hydrologic Unit 03050103, 800 ft below Dearborn Dam, on Catawba River 100 ft from left edge, 1.5 mi southeast of Great falls, SC and 19.1 miles southwest of Heath springs, SC.

DRAINAGE AREA - 4,100 mi²

SURFACE-WATER RECORDS

PERIOD OF RECORD - June 2016 to current year.

GAGE - Data collection platform. Datum of gage is 0.00 ft above NAVD of 1988.

REMARKS - Considerable regulation, caused by dam upstream.

EXTREMES FOR PERIOD OF RECORD -

Maximum gage Height, 288.99 ft, Feb. 7, 2020.

Minimum gage height, 279.02 ft, July 16, 2018.

WATER-QUALITY RECORDS

PERIOD OF RECORD - March 2016 to Current year.

PERIOD OF DAILY RECORD -

DISSOLVED OXYGEN: March 2016 to Current year.

WATER TEMPERTURE: March 2016 to current year.

INSTRUMENTATION - Water-quality monitor with satellite telemetry collects data at 15-minute intervals.

REMARKS - Data is collected for the months April through November. Considerable regulation, caused by dam upstream.

For the 2016 WY, Temperature records rated excellent.
For the 2016 WY, Dissolved oxygen records rated excellent except for Sep. 27-30, which are good.

EXTREMES FOR PERIOD OF RECORD -

WATER TEMPERATURE: Maximum recorded, 32.0°C, July 23, 2017; minimum recorded, 6.2°C, January 12, 2017.

DISSOLVED OXYGEN: Maximum recorded, 13.8 mg/L, September 24, 2020; minimum recorded, 0.8 mg/L, August 30, 31, 2016.