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- Water-Year Summary reports summarize a year of hydrologic data in a printer-friendly format.
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USGS Water-Year Summary 2024
01011000 ALLAGASH RIVER NEAR ALLAGASH, ME
LOCATION - Lat 47°04'11", long 69°04'46" referenced to North American Datum of 1983, Aroostook County, ME, Hydrologic Unit 01010002, on left bank 3.0 mi upstream from mouth and village of Allagash.
DRAINAGE AREA - 1,478 mi² of which 249 mi² probably is noncontributing. Drainage area is 1229 mi², not including 249 mi² drained by Chamberlain Lake through Telos Canal.
REVISIONS HISTORY - WSP 1231: 1911. WDR ME-82-1: Drainage area.
SURFACE-WATER RECORDS
PERIOD OF RECORD - DISCHARGE: July 1910 to November 1910, May to November 1911, September 1931 to current year. Monthly discharges only for some periods prior to November 1911, published in WSP 1301.
GAGE - Water-stage recorder. Datum of gage is 604.6 ft above National Geodetic Vertical Datum of 1929. Prior to December 1911, nonrecording gage at site 3.0 mi downstream at different datum.
REMARKS - Some regulation for recreational purposes since May 1969 by Churchill Lake 58 mi upstream.
Water Year 2023: Records good, except for estimated daily discharges, which are poor.
Water Year 2022: Records good, except for estimated daily discharges, which are poor.
Water Year 2021: Records good, except for estimated daily discharges, which are poor.
Water Year 2020: Records good, except for estimated daily discharges, which are poor.
Water Year 2019: Records good, except for estimated daily discharges, which are poor.
Water Year 2018: Records good, except for estimated daily discharges, which are poor.
Water Year 2017: Records good, except for period of ice effect, Dec. 1 to Apr. 14, and period of no gage-height record, Dec. 29 to Jan. 4, which are poor.
Water Year 2016: Records good, except for periods of ice effect, Nov. 22 to Dec. 5, Dec. 16-24, Dec. 27 to Apr. 16, and periods of no gage-height record, Nov. 30, Dec. 1, 4-5, 21, Jan. 3-6, 19-20, which are poor.
Water Year 2015: Records good, except for periods of ice effect, Nov. 20-22, Nov. 27 to Apr. 19, and periods of no gage-height record, Dec. 3, Jan. 3-23, Jan. 25 to Feb. 3, which are poor.
Water Year 2014: Records good, except for period of ice effect, Nov. 23 to Apr. 16, which is poor.
EXTREMES FOR PERIOD OF RECORD - Maximum discharge, 40,900 ft³/s, Apr. 30, 2008, gage height, 14.89 ft; maximum gage height, 19.78 ft, Apr. 10, 1991 (backwater from ice); minimum discharge, 87 ft³/s, Sept. 11, 1960.
CLIMATOLOGICAL RECORDS
PERIOD OF RECORD - Air temperature sensor: October 2021 to current year.
INSTRUMENTATION - In-situ thermistor located on the West side of the concrete gage house, 2 feet from the building and about 6 feet above ground level.
EXTREMES FOR PERIOD OF RECORD - AIR TEMPERATURE: Maximum, 33.7˚C, June 1, 2023; minimum, -36.0°C Jan. 27, 2022.
REMARKS - Gaps in the record indicate missing data.
Water Year 2023: Records good.
Water Year 2022: Records good.
WATER-QUALITY RECORDS
PERIOD OF RECORD - CHEMICAL ANALYSES: Water years 1952-53, 1975, 1981.
PERIOD OF DAILY RECORD - SPECIFIC CONDUCTANCE: April 1975 to September 1980.
WATER TEMPERATURE: April 1975 to September 1980. October 2010 to September 2015, October 2021 to current year.
SUSPENDED SEDIMENT DISCHARGE: October 1975 to September 1976.
INSTRUMENTATION - In-situ thermistor located on left bank 50 feet streamward of gage house and about 0.5 feet above river bed.
REMARKS - Gaps in the record indicate missing data.
Water Year 2023: Records good.
Water Year 2022: Records good.
Water Year 2015: Records fair.
Water Year 2014: Records fair.
EXTREMES FOR PERIOD OF DAILY RECORD - WATER TEMPERATURE: Maximum, 28.5°C, July 15, 2012; minimum, -0.1°C, on many days during winter periods in water years 2011-2015, 2021-2023.
