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Peak Streamflow for the Nation

USGS 05525000 IROQUOIS RIVER AT IROQUOIS, IL

Iroquois County, Illinois
Hydrologic Unit Code 07120002
Latitude  40°49'23", Longitude  87°34'54" NAD83
Drainage area 686  square miles
Gage datum 614.13 feet above NAVD88
Output formats
Table
Graph
Tab-separated file
peakfq (watstore) format
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Water
Year		 Date Gage
Height
(feet)		 Stream-
flow
(cfs)
1945 1945-05-20 18.27 3,570
1946 1945-10-04 16.19 2,820
1947 1947-06-05 13.97 2,150
1948 1948-03-24 15.18 2,510
1949 1949-02-18 16.20 2,820
1950 1950-04-06 20.54 4,740
1951 1951-07-10 23.30 6,460
1952 1952-06-17 15.50 2,580
1953 1953-03-19 15.602 2,610
1954 1954-04-13 12.21 1,370
1955 1955-06-13 15.95 2,250
1956 1956-05-02 19.01 3,990
1957 1957-07-13 22.79 5,600
1958 1958-06-13 26.31 10,400
1959 1959-02-13 22.511 5,4002
1960 1960-04-01 18.21 3,580
1961 1961-04-27 16.31 2,720
1962 1962-03-23 19.29 4,000
1963 1963-03-07 21.49 5,150
1964 1964-04-23 13.41 1,540
1965 1965-04-28 15.22 2,240
1966 1965-12-28 19.14 3,620
1967 1966-12-12 16.10 2,590
1968 1968-02-02 23.35 6,390
1969 1969-02-01 18.66 3,700
1970 1970-05-15 22.28 5,400
1971 1971-02-05 15.77 2,310
1972 1972-09-30 16.11 2,480
1973 1973-04-24 18.96 3,580
1974 1974-01-24 20.22 4,210
1975 1975-06-17 19.49 3,850
1976 1976-02-19 19.53 3,860
1977 1977-08-12 15.37 2,280
1978 1978-03-21 20.49 4,340
1979 1979-03-05 23.81 6,910
1980 1980-06-03 20.04 4,570
1981 1981-05-18 20.45 4,780
1982 1982-02-24 22.56 6,090
1983 1983-05-04 19.83 4,470
1984 1984-02-15 19.86 4,480
1985 1985-02-25 22.46 6,020
1986 1985-11-21 20.20 4,650
1987 1987-05-22 17.38 3,320
1988 1988-04-01 15.81 2,690
1989 1989-09-02 18.25 3,670
1990 1990-03-13 23.46 6,400
1991 1990-12-30 24.59 7,720
1992 1992-02-21 13.88 1,370
1993 1993-01-07 22.29 5,560
1994 1993-10-21 23.35 5,610
1995 1995-05-28 20.10 4,250
1996 1996-05-30 17.28 2,970
1997 1997-02-28 21.94 6,030
1998 1998-03-22 21.602 5,740
1999 1999-01-26 20.53 4,890
2000 2000-07-04 18.58 3,660
2001 2001-06-06 19.76 4,350
2002 2002-05-14 19.95 4,470
2003 2003-07-12 25.74 9,920
2004 2004-06-13 22.74 6,740
2005 2005-01-14 23.54 6,280
2006 2006-04-19 17.30 3,030
2007 2007-03-25 20.402 4,280
2008 2008-01-09 25.81 9,590
2009 2009-03-11 24.80 8,150
2010 2010-06-25 18.17 3,360
2011 2011-04-29 21.83 5,790
2012 2012-05-08 17.91 3,260
2013 2013-06-02 21.89 4,950
2014 2014-06-26 20.63 4,380
2015 2015-06-21 25.27 9,060
2016 2015-12-29 23.07 6,700
2017 2017-05-05 18.69 3,820
2018 2018-02-22 26.17 9,900
2019 2019-05-03 20.59 4,650
2020 2020-06-28 22.03 5,710
2021 2021-07-01 21.22 5,100
2022 2022-02-19 18.47 3,780
2023 2023-03-05 20.37 4,170
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  Peak Gage-Height Qualification Codes.
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  Peak Streamflow Qualification Codes.