USGS Water-Year Summary for Site 03027500

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	Available Parameters
	00010 Temperature, water(Max.,Min.,Mean)
	00060 Discharge(Mean)
	00095 Specific cond at 25C(Max.,Min.,Mean)
	00300 Dissolved oxygen(Max.,Min.,Mean)
	00400 pH(Max.,Min.,Med.)
	63680 Turbidity, Form Neph(Max.,Mean,Min.)
	63680 Turbidity, Form Neph(Max.,Mean,Min.) [(2)]

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

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USGS Water-Year Summary 2024

03027500 EAST BRANCH CLARION RIVER AT EAST BRANCH CLARION RIVER DAM, PA

LOCATION - Lat 41°33'11", long 78°35'47" referenced to North American Datum of 1927, Elk County, PA, Hydrologic Unit 05010005, on left bank 700 ft upstream from Middle Fork, 0.5 mi downstream from East Branch Clarion River Dam, and 1.2 mi northeast of Glen Hazel.

DRAINAGE AREA - 73.2 mi².

REVISIONS HISTORY -

WSP 1235: Drainage area.

Prior to April 5, 2023, the datum of gage was erroneously reported as 1517.58 ft above National Geodetic Vertical Datum of 1929

SURFACE-WATER RECORDS

PERIOD OF RECORD - 1949-91 (continuous record), 2005-2008 (measurements only), 2009 to current year.

GAGE - Water-stage recorder and water-quality monitor. Datum of gage is 1,517.3 ft above North American Vertical Datum of 1988. Prior to April 5, 2023, the datum was erroneously reported as 1,517.58 ft above National Geodetic Vertical Datum of 1929 (Corps of Engineers benchmark). Satellite telemetry at station.

COOPERATION - Station established and maintained by the U.S. Geological Survey in cooperation with the U.S. Army Corps of Engineers, Pittsburgh District.

REMARKS - Flow regulated since June 1952 by East Branch Clarion River Lake 0.5 mi upstream. Records are good except those for estimated discharges, which are poor.

EXTREMES OUTSIDE PERIOD OF RECORD - Flood of May 28, 1946 reached a stage of 8.3 ft from graph based on gage readings at site 1,000 ft downstream and at a different datum, discharge, 4,000 ft³/s.

WATER-QUALITY RECORDS

PERIOD OF DAILY RECORD - WATER TEMPERATURE: April 2007 to current year. SPECIFIC CONDUCTANCE: October 2013 to September 2022. pH: October 2013 to September 2022. DISSOLVED OXYGEN: October 2013 to September 2022. TURBIDITY: October 2013 to September 2022. REDUNDANT TURBIDITY (SECOND MONITOR DEPLOYED ADJACENT TO PRIMARY MONITOR): September 14, 2016 to November 10, 2021.

INSTRUMENTATION - Water quality meter, measuring water temperature, specific conductance, pH, dissolved oxygen, and turbidity, interfaced with a data collection platform with 15-minute recording interval until September 2022. Water temperature only October 2022 to present.

REMARKS -

The reporting precision of the turbidity probe in low turbidity water is +/- 0.3 FNU, therefore the lowest reportable value, 0 FNU, does not necessarily indicate a condition of zero turbidity. The reporting precision of the turbidity probe in high turbidity water (>1,000 FNU) is +/- 5 percent of the reported value.

Historically water temperatures below 0 degrees Celsius were not reported. Water temperature sensors now have the ability to accurately read water temperatures below 0 degrees Celsius.

Cross-sectional water quality data is available upon request.

Interruptions in the record are due to equipment malfunctions or erroneous data.

Beginning in water year 2019, water quality records are not rated as "excellent", "good", "fair", or "poor".

EXTREMES FOR PERIOD OF DAILY RECORD - WATER TEMPERATURE: Maximum, 19.9°C, Aug 23, 2021; minimum, 0.9°C, Feb 24, 2015. SPECIFIC CONDUCTANCE: Maximum, 90 microsiemens per centimeter, March 6, 2019; minimum, 34 microsiemens per centimeter, multiple occurrences. pH: Maximum, 8.4 standard units, April 23, 2014; minimum, 5.8 standard units, several occurrences. DISSOLVED OXYGEN: Maximum, 14.1mg/L, February 9, 2019; minimum, 8.3 mg/L, July 17, 2021. TURBIDITY: Maximum, 317 FNU, July 17, 2021; minimum, 0.0 FNU, several occurrences.