USGS Water-Year Summary for Site 02171500

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	Available Parameters
	00010 Temperature, water(Mean,Min.,Max.)
	00060 Discharge(Mean)
	00095 Specific cond at 25C(Max.,Mean,Min.)
	00300 Dissolved oxygen(Mean,Min.,Max.)
	00400 pH(Med.,Min.,Max.)

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

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USGS Water-Year Summary 2023

02171500 SANTEE RIVER NEAR PINEVILLE, SC

LOCATION - Lat 33°27'13.6", long 80°08'28.9" referenced to North American Datum of 1983, Berkeley County, SC, Hydrologic Unit 03050112, on right bank 2.4 mi downstream from Lake Marion Dam, 3.0 mi upstream from Dead River, 6.7 mi west of Pineville, and at mile 85.0.

DRAINAGE AREA - 14,700 mi².

SURFACE-WATER RECORDS

PERIOD OF RECORD - May 1942 to current year.

GAGE - Data collection platform. Datum of gage is 22.83 ft above NGVD of 1929 (from South Carolina Geodetic Survey benchmark). Prior to Feb. 25, 1943, nonrecording gage at site 2.2 mi upstream of temporary water-stage recorder operated by U.S. Army Corps of Engineers, at site 200 ft upstream, at different datum.

REMARKS -

Discharge records for 1987-2004 water years are computed by utilization of a One-Dimensional unsteady flow simulation model (BRANCH). Flow completely regulated by Lake Marion (station 02171000). Water is diverted above the station from Lake Marion through Diversion Canal into Lake Moultrie (station 02172000) for generation of power and for navigation, and discharged into Cooper River Basin (station 02172002) and lower Santee (station 02171645). During periods of incomplete gage-height record, values of daily mean discharge from Lake Marion Hydro and Spillway were obtained from the South Carolina Public Service Authority. These values are shown as estimated daily discharges. Seepage from north dike of Lake Marion Dam bypasses station via Little River (station 02171520).

Gage-height records are generally good to fair. Discharge records are generally good to fair except for estimated discharges, which are poor. Additional details on the accuracy of the records can be obtained by contacting the USGS South Atlantic Water Science Center at gs-w-sc_nwisweb_data_inquiries@usgs.gov.

EXTREMES FOR PERIOD OF RECORD - Lowest daily mean flow for period of record is caused by repair work at spillway at Lake Marion. Maximum peak flow for period of record is from rating curve extended above 13,000 cfs on basis of computation of peak flow over spillway at Lake Marion.

WATER-QUALITY RECORDS

PERIOD OF RECORD - April 2005 to April 2006 (discontinued).

PERIOD OF DAILY RECORD - WATER TEMPERATURE: April 2005 to April 2006 (discontinued). DISSOLVED OXYGEN: April 2005 to April 2006 (discontinued).

EXTREMES FOR PERIOD OF DAILY RECORD -

WATER TEMPERATURE: Maximum, 32.7 C, July 28, 2005, but may have been higher during periods of missing record; Minimum, 7.0 C, Feb, 2, 2022

SPECIFIC CONDUCTANCE: Maximum 112 uS/cm on March 27, 2022, but may have been higher during periods of missing record; Minimum, 73 uS/cm units on August 31, 2023.

DISSOLVED OXYGEN: Maximum, 11.5 mg/L, December 27, 30, 2005; Minimum, 3.2 mg/L, July 30, 2023,

pH: Maximum, 8.1 units, April 17, 2023; Minimum, 6.8 units, Sept. 5 & 6, 2022.