USGS Water-Year Summary for Site 15298040

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

15298040 CHULITNA RIVER 5 MILES ABOVE MOUTH NEAR PORT ALSWORTH, AK

LOCATION - Lat 60°12'15.6", long 154°42'08" referenced to North American Datum of 1927, in SW 1/4 NE 1/4 SW 1/4 sec.05, T.1 N., R.31 W., Lake and Peninsula Borough, AK, Hydrologic Unit 19030205, (Lake Clark A-6 quad), on the right bank, 5.0 miles upstream from the mouth, and 13 miles from the town of Port Alsworth, AK.

DRAINAGE AREA - 1,110 mi².

REVISIONS HISTORY -

WDR-US-2010, WDR-US-2011, WDR-US-2013

Drainage area was revised from 1120 mi² to 1110 mi² on December 1, 2021.

SURFACE-WATER RECORDS

PERIOD OF RECORD - October 2009 to September 2011. March and June, 2012 (discharge measurements only). May 2013 to October 2017.

GAGE - Water-stage recorder. Datum of gage is 250 ft. above sea level, from topographic map.

REMARKS - Satellite telemetry at station.

WATER-QUALITY RECORDS

PERIOD OF RECORD - Water years 2010 to 2017.

PERIOD OF DAILY RECORD - SPECIFIC CONDUCTANCE: Water years 2010 to 2011, May to September, 2013 to 2017. (seasonal). pH: Water years 2010 to 2011, May to September, 2013 to 2017. (seasonal). WATER TEMPERATURE: Water years 2010 to 2011, 2013 to 2017. DISSOLVED OXYGEN: Water years 2010 to 2011, May to September, 2013 to 2017. (seasonal). TURBIDITY: Water years 2010 to 2011, May to September, 2013 to 2017. (seasonal).

INSTRUMENTATION - Water temperature recorder set at 15-minute recording interval. Water-quality probe recording water temperature, specific conductance, dissolved oxygen, pH, and turbidity set at 15-minute recording interval is seasonal. Data is transmitted to GOES satellite.

EXTREMES FOR PERIOD OF DAILY RECORD - SPECIFIC CONDUCTANCE: Maximum recorded, 94 uS/cm, July 30, 2016, but may have been higher during periods of missing record; minimum recorded, 45 uS/cm, May 26, 2013, but may have been lower during periods of missing record. pH: Maximum recorded, 7.9 pH units, June 23, 2010 and August 3, 2016, but may have been higher during periods of missing record; minimum recorded, 7.0 pH units, Sept. 15, 2015, September 8, 2325, 27-30, 2017, but may have been lower during periods of missing record. WATER TEMPERATURE: Maximum recorded, 20.5°C, July 28, 2013, but may have been higher during periods of missing record; minimum recorded, 0.0°C, many days during fall, winter, and spring most years. DISSOLVED OXYGEN: Maximum recorded, 13.2 mg/l, May 24 and 25, 2013, but may have been higher during periods of missing record; minimum recorded, 8.8 mg/l, June 19, 2015 and July 24, 2017, but may have been lower during periods of missing record. TURBIDITY: Maximum recorded, 170 Formazin Nephelometric Units (FNU), Oct. 10, 2016, but may have been higher during periods of missing record; minimum recorded, <1 FNU on many days during period of daily record.