USGS Water-Year Summary for Site 11511990

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	Available Parameters
	00010 Temperature, water(Mean,Min.,Max.)
	00095 Specific cond at 25C(Max.,Mean,Min.)
	00300 Dissolved oxygen(Max.,Mean,Min.)
	00400 pH(Med.,Max.,Min.)
	63680 Turbidity, Form Neph(Med.,Max.,Min.)

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

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USGS Water-Year Summary 2024

11511990 KLAMATH RIVER ABOVE FALL CREEK NR COPCO, CA

LOCATION - Lat 41°58'22.80", long 122°21'53.36" referenced to North American Datum of 1983, in NE 1/4 NE 1/4 sec.36, T.48 N., R.5 W., Siskiyou County, CA, Hydrologic Unit 18010206, on right bank at downstream side of bridge on Daggett Rd, 1.8 mi downstream of Copco Dam 2, and 0.7 mi southwest of Copco.

DRAINAGE AREA - 8,000 mi². approximately

SURFACE-WATER RECORDS

PERIOD OF RECORD - December 2022 to current year.

GAGE - Water-stage recorder. Elevation of gage is 2,343 ft above NAVD of 1988, from digital elevation model.

EXTREMES FOR PERIOD OF RECORD - Maximum gage height, 39.15 ft Apr. 19, 2023; minimum, 28.34 ft Sept. 22, 2023.

WATER-QUALITY RECORDS

PERIOD OF RECORD -

SPECIFIC CONDUCTANCE: December 2022 to current year.

pH: February 2023 to current year.

WATER TEMPERATURE: December 2022 to current year.

DISSOLVED OXYGEN: December 2022 to current year.

TURBIDITY: February 2023 to current year.

INSTRUMENTATION - Water-quality monitor. Any use of trade, product, or firm names in this publication is for descriptive purposes only and does not imply endorsement by the U.S. Government.

REMARKS - TURBIDITY: Data collected using a YSI EXO2 sonde. Manufacturers stated accuracy is the greater of +/- 2 percent or 0.3 Formazin Nephelometric Units (FNU) except for 1,000-4,000 FNU, which is +/- 5 percent. FNU values below 10 are reported to nearest 0.1 FNU. Negative recorded values are reported as 0.0 FNU.

EXTREMES FOR PERIOD OF RECORD -

SPECIFIC CONDUCTANCE: Maximum, 206 microsiemens Sept. 28, 2023; minimum, 97 microsiemens Sept. 23, 2023.

pH: Maximum, 9.5 units Sept. 28, 2023; minimum, 7.3 units Sept. 15, 2023.

WATER TEMPERATURE: Maximum, 24.1°C July 6, 2023; minimum, 2.1°C Jan. 31, 2023.

DISSOLVED OXYGEN: Maximum, 15.1 mg/L Mar. 2, 2023; minimum, 3.2 mg/L Sept. 15, 2023.

TURBIDITY: Maximum, 1,490 FNU Sept. 29, 2023; minimum, 1.9 FNU July 3,2023.