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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 2024
01053500 ANDROSCOGGIN RIVER AT ERROL, NH
LOCATION - Lat 44°46'57", long 71°07'43" referenced to North American Datum of 1983, Coos County, NH, Hydrologic Unit 01040001, on right bank 0.4 mi downstream from Errol Dam, 0.4 mi northeast of Errol, and 0.6 mi upstream from Clear Stream.
DRAINAGE AREA - 1,046 mi².
REVISIONS HISTORY - WDR ME-81-1: Drainage area. WDR ME-97-1: 1906-43(M) 1978-84(M).
SURFACE-WATER RECORDS
PERIOD OF RECORD - DISCHARGE: January 1905 to current year. November and December 1912, monthly discharges only, published in WSP 1301. Prior to 1922, published as "at Errol Dam." Records for water years 1923-44 have not been published but are available in the files of the U.S. Geological Survey.
GAGE - Water-stage recorder and crest-stage gage. Datum of gage is 1,227.30 ft above National Geodetic Vertical Datum of 1929. Prior to Dec. 8, 1943, nonrecording gage at Errol Dam at datum 5.0 ft higher.
REMARKS - Flow regulated by Rangeley, Mooselookmeguntic, Richardson, Aziscohos, and Umbagog Lakes, with final regulation at Errol Dam, 0.4 mi upstream.
Water Year 2023: No estimated daily discharges. Records good.
Water Year 2022: No estimated daily discharges. Records good.
Water Year 2021: No estimated daily discharges. Records good.
Water Year 2020: No estimated daily discharges. Records good.
Water Year 2019: No estimated daily discharges. Records good.
Water Year 2018: No estimated daily discharges. Records good.
Water Year 2017: No estimated daily discharges. Records good.
Water Year 2016: No estimated daily discharges. Records good.
Water Year 2015: No estimated daily discharges. Records good.
Water Year 2014: No estimated daily discharges. Records good.
EXTREMES FOR PERIOD OF RECORD - Maximum discharge, 16,500 ft³/s, May 22, 1969, gage height 9.40 ft; minimum daily discharge, leakage only at various times when gates in dam were closed in water years 1918, 1919, 1923, 1924, 1928, and 1941.
WATER-QUALITY RECORDS
PERIOD OF RECORD -
CHEMICAL ANALYSES: Water years 1955, 1958.
REVISED RECords: WDR ME-81-1: Drainage area. WDR ME-97-1: 1906-43(M) 1978-84(M).
