USGS Water-Year Summary for Site 15015595

Click to hide Water-Year Summary instructions and information

Water-Year Summary reports summarize a year of hydrologic data in a printer-friendly format.
For water years 2014 onward, choose a water year and parameter and an on-demand Water-Year Summary report will be generated.
For water years 2006 through 2013, choose a water year and an Annual Water Data Report will be provided.
For water years 2005 and earlier, Annual Water Data Reports may be available in digital format.
Not all sites have reports available for every water year.

	Available Parameters
	00010 Temperature, water(Max.,Min.,Mean)
	00060 Discharge(Mean)
	00095 Specific cond at 25C(Min.,Max.,Mean)
	00300 Dissolved oxygen(Min.,Max.,Mean)
	00400 pH(Med.,Min.,Max.)
	32322 Relative fDOM, water, in situ(Mean,Max.,Min.)
	63680 Turbidity, Form Neph(Mean,Max.,Min.)

Select a water year

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

Print this page

USGS Water-Year Summary 2024

15015595 UNUK RIVER BELOW BLUE RIVER NEAR WRANGELL, AK

LOCATION - Lat 56°14'26", long 130°52'49" referenced to North American Datum of 1927, in NW 1/4 NW 1/4 NE 1/4 sec.16, T.65 S., R.94 E., Ketchikan Gateway Borough, AK, Hydrologic Unit 19010105, (Bradfield Canal A-3 quad), in Misty Fiords National Monument, on right bank 17 mi upstream from the Post (Bishop Ranch), near the mouth of Burroughs Bay and approximately 60 mi southeast of Wrangell.

DRAINAGE AREA - 745 mi².

REVISIONS HISTORY - The period of record for Relative fDOM (RFU, USGS parameter code 32322) from June 4, 2019 to Nov. 27, 2019 was previously published in error. fDOM is instead published as fDOM, water, in situ (QSE, USGS parameter code 32295).

SURFACE-WATER RECORDS

PERIOD OF RECORD - April 2003 to September 2007, November 2017 to current year.

GAGE - Water-stage recorder. Elevation of gage is 130 ft above sea level, from topographic map.

REMARKS - Ice effected days are estimated daily discharges. Records fair. GOES satellite telemetry at station.

WATER-QUALITY RECORDS

PERIOD OF RECORD - Water years 2003 to 2007. November 2017 to current year.

PERIOD OF DAILY RECORD -

WATER TEMPERATURE: November 2017 to current year.

SPECIFIC CONDUCTANCE: November 2017 to current year.

PH: November 2017 to current year.

TURBIDITY: November 2017 to current year.

DISSOLVED OXYGEN: November 2017 to current year.

fDOM, RFU, in-situ June 2019 to current year.

INSTRUMENTATION - Water-quality monitor recording Water Temperature, Specific Conductance, pH, Turbidity, and Dissolved Oxygen set at 15-minute recording interval.

REMARKS - River is well mixed at gage station.

EXTREMES FOR PERIOD OF DAILY RECORD -

WATER TEMPERATURE: Maximum recorded, 12.2°C, July 27, 2018; minimum recorded, 0.0°C, many days during most winter periods.

SPECIFIC CONDUCTANCE: Maximum recorded, 220 Us/cm, March 6, 2018; minimum recorded, 48 Us/cm, June 18, 2019.

pH: Maximum recorded, 8.5 September 14, 2018; minimum recorded, 7.1, March 17, 2019.

TURBIDITY: Maximum recorded, 1,660 FNU, September 19, 2019; minimum recorded, 0.1 FNU, February 20 and 23 2018, but may have been lower during period of missing record.

DISSOLVED OXYGEN: Maximum recorded, 14.8 mg/L, February 20, 2018; minimum recorded, 10.3 mg/L, June 29, 2018.

fDOM: Maximum recorded, 3.25, September 25, 2019; minimum recorded, .10, many days in June 2019