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Peak Streamflow for the Nation

USGS 05558300 ILLINOIS RIVER AT HENRY, IL

Marshall County, Illinois
Hydrologic Unit Code 071300011301
Latitude  41°06'26.2", Longitude  89°21'22.4" NAD83
Drainage area 13,544.0  square miles
Gage datum 425.85 feet above NAVD88
Output formats
Table
Graph
Tab-separated file
peakfq (watstore) format
Reselect output format
Water
Year		 Date Gage
Height
(feet)		 Stream-
flow
(cfs)
1982 1982-03-22 30.75 104,0006
1983 1982-12-07 29.972 108,0006
1984 1984-03-23 24.452 53,7006
1985 1985-03-05 31.252 106,0006
1986 1985-11-21 27.922 95,2006
1987 1987-05-22 19.602 46,3006
1988 1988-04-07 20.562 45,1006
1989 1989-09-11 26.02 45,0001,6
1990 1990-03-20   40,2001,6
1991 1991-04-19   53,7001,6
1992 1992-09-11 17.212 30,9006
1993 1993-01-06   67,0001,6
1994 1993-10-22   47,0001,2,6
1995 1995-04-13 22.662 58,9006
1996 1996-05-30 24.912 78,0006
1997 1997-02-23 27.192 117,0006
1998 1998-05-10 26.142 88,9006
1999 1999-01-25 22.652 55,0006
2000 2000-07-12 20.802 40,4006
2001 2001-02-12 24.77 71,8006
2002 2002-05-14 26.672 88,5006
2003 2003-05-12 19.532 38,4006
2004 2004-06-14 22.532 52,1006
2005 2005-01-15 26.092 84,6006
2006 2006-04-19 18.662 32,4006
2007 2007-08-26 25.622 90,3006
2008 2008-09-16 27.961,2 128,0006
2009 2008-12-30 25.932 92,4006
2010 2009-11-02 24.142 58,3006
2011 2011-04-28 25.582 64,0006
2012 2012-05-10 20.522 49,0006
2013 2013-04-20 30.862 161,0006
2014 2014-02-23 23.16 65,4006
2015 2015-06-17 27.812 98,5006
2016 2015-12-31 28.432 107,0006
2017 2017-05-03 26.382 93,1006
2018 2018-02-23 26.762 111,0006
2019 2019-05-03 28.352 108,0006
2020 2020-05-20 29.822 120,0006
2021 2021-07-01 23.822 64,2006
2022 2021-10-31 23.202 51,6006
2023 2023-03-01 20.402 41,9006
2024 2024-01-28 24.152 74,4006
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  Peak Gage-Height Qualification Codes.
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  Peak Streamflow Qualification Codes.