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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.
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USGS Water-Year Summary 2025
15331000 Middle Fork Fortymile River near Mouth near Chicken, AK
LOCATION - Lat 64°28'15.1", long 142°13'17.4" referenced to North American Datum of 1983, Southeast Fairbanks Division, AK, Hydrologic Unit is unknown, on the right bank, 1.6 river miles upstream of the confluence with the North Fork Fortymile River and 28 miles northwest of chicken.
DRAINAGE AREA - 1,070 mi².
SURFACE-WATER RECORDS
PERIOD OF RECORD - May 19, 2019 to current year (Seasonal).
GAGE - Water-stage recorder. Datum of gage is 1683.43 ft NAVD88.
REMARKS - GOES satellite telemetry at station.
EXTREMES FOR PERIOD OF RECORD - Maximum discharge 18,400 ft³/s, June 22, 2020, gage height 36.94 ft.
WATER-QUALITY RECORDS
PERIOD OF RECORD - WATER TEMPERATURE: May 19, 2019 to current year (seasonal).
INSTRUMENTATION - Electronic water temperature recorder set for 15 minute recording interval.
EXTREMES FOR PERIOD OF RECORD - WATER TEMPERATURE: Maximum, 20.8°C July 22, 2019; minimum, 0.0°C October 5, 2019. Water temperature goes to 0.0°C on many days over winter, but water temperature sensor only operated seasonally.
