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- 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.
USGS Water-Year Summary 2024
15200280 GULKANA RIVER AT SOURDOUGH, AK
LOCATION - Lat 62°31'15", long 145°31'51" referenced to North American Datum of 1927, in NE 1/4 SE 1/4 NE 1/4 sec.35, T.9 N., R.2 W., Valdez-Cordova Division, AK, Hydrologic Unit 19020102, (Gulkana C-4 quad), at Alyeska Pipeline Service Company bridge 70 ft streamward on downstream edge, 0.3 mi downstream from Sourdough Creek and 0.8 mi southwest of Sourdough.
DRAINAGE AREA - 1,760 mi².
REVISIONS HISTORY - WRD AK-75-1: Drainage area.
SURFACE-WATER RECORDS
PERIOD OF RECORD - October 1972 to September 1978, May to September 1982, October 1988 to September 1993, May 1997 to September 2004, and May 2007 to current year.
GAGE - Water-stage recorder. Datum of gage is 1852.10 ft NAVD88.
WATER-QUALITY RECORDS
PERIOD OF RECORD - July 2014 to current year.
PERIOD OF DAILY RECORD - WATER TEMPERATURE: July 2014 to current year.
INSTRUMENTATION - Electronic water temperature recorder set for 15 minute recording interval.
EXTREMES FOR PERIOD OF RECORD - WATER TEMPERATURE: Maximum, 23.4°C, June 30, 2019; minimum, 0.0°C, many days during winter.
