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Peak Streamflow for Iowa

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Boating safety tips are available from the U.S. Coast Guard.

NOTE: Station Numbers for Iowa precipitation gages have changed (see list).


USGS 06483500 Rock River near Rock Valley, IA

Sioux County, Iowa
Hydrologic Unit Code 10170204
Latitude  43°12'54.3", Longitude  96°17'42.1" NAD83
Drainage area 1,592  square miles
Gage datum 1,223.39 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)
1897 1897 17.00Bm  
1948 1948-07-23 10.90 4,090
1949 1949-03-06 12.30 5,790
1950 1950-03-25 11.482 4,560
1951 1951-04-05 14.77 14,300
1952 1952-03-31 15.30 17,300
1953 1953-06-08 15.99 18,900
1954 1954-06-21 15.86 19,200
1955 1955-03-12 9.31 2,370
1956 1956-07-02 7.59 1,160
1957 1957-06-19 10.55 3,770
1958 1958-04-07 6.18 545
1959 1959-06-01 14.06 10,200
1960 1960-03-31 15.38 16,700
1961 1961-03-02 13.06 8,580
1962 1962-03-30 16.91 28,400
1963 1963-06-12 7.56 1,300
1964 1964-09-08 7.70 1,390
1965 1965-04-07 14.94 15,700
1966 1966-02-10 14.78 11,700
1967 1967-03-04 10.06 3,260
1968 1968-07-20 4.16 182
1969 1969-04-07 17.32 40,400
1970 1970-05-28 14.05 10,200
1971 1971-02-19 13.73 9,060
1972 1972-03-13 12.04 5,890
1973 1973-03-04 14.20 10,700
1974 1974-02-21 6.652 988
1975 1975-04-30 8.71 2,370
1976 1976-03-15 8.642 2,250
1977 1977-03-13   2,9802
1978 1978-03-21 15.32 7,990
1979 1979-03-23 18.91 19,300
1980 1979-11-02 15.67 8,820
1981 1981-06-16 11.20 3,200
1982 1982-02-24 14.61 7,070
1983 1983-06-20 18.85 19,000
1984 1984-06-18 18.06 16,300
1985 1985-04-24 16.07 12,500
1986 1986-03-19 16.88 11,500
1987 1987-03-25 13.59 4,990
1988 1988-03-12 8.62 1,810
1989 1989-03-12 11.39 3,340
1990 1990-06-28 11.43 3,360
1991 1991-06-06 7.72 1,390
1992 1992-07-13 13.12 5,470
1993 1993-05-09 19.97 29,300
1994 1994-06-14 18.27 23,100
1995 1995-05-29 12.27 6,740
1996 1996-06-22 12.41 6,980
1997 1997-03-29 15.17 14,600
1998 1998-03-29 8.71 2,580
1999 1999-04-10 10.10 5,000
2000 2000-05-20 8.31 2,900
2001 2001-04-24 17.74 21,600
2002 2002-08-24 6.06 1,250
2003 2003-05-13 6.24 1,230
2004 2004-03-02 12.24 8,380
2005 2005-09-27 9.68 4,460
2006 2006-04-09 16.44 17,900
2007 2007-03-15 17.96 15,600
2008 2008-06-06 14.54 13,100
2009 2009-02-11 12.061,2 4,9102
2010 2010-09-25 19.852 24,200
2011 2011-03-18 13.76 7,440
2012 2012-05-29 13.89 7,380
2013 2013-05-26 12.01 5,590
2014 2014-06-17 22.72 60,600
2015 2015-08-21 8.83 2,220
2016 2016-05-02 11.442 5,030
2017 2017-05-22 10.052 3,560
2018 2018-06-22 21.20 34,800
2019 2019-03-15 20.61 37,800
2020 2019-10-07 10.752 4,300
2021 2021-04-10 6.722 815
2022 2022-06-01 9.56 2,500
2023 2023-04-13 11.252,5 4,570
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  Peak Gage-Height Qualification Codes.
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  Peak Streamflow Qualification Codes.