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Peak Streamflow for the Nation

USGS 01646500 POTOMAC RIVER NEAR WASH, DC LITTLE FALLS PUMP STA

Montgomery County, Maryland
Hydrologic Unit Code 02070008
Latitude  38°56'59.2", Longitude  77°07'39.5" NAD83
Drainage area 11,560  square miles
Gage datum 37.20 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)
1931 1931-04-03 6.90 37,900
1932 1932-05-14 15.25 168,000
1933 1933-04-22 12.80 127,000
1934 1934-09-18 7.80 53,500
1935 1934-12-02 13.50 139,000
1936 1936-03-19 28.103 484,000
1937 1937-04-28 23.30 347,000
1938 1937-10-30 15.62 181,000
1939 1939-02-05 12.60 129,000
1940 1940-04-22 11.29 107,000
1941 1941-04-07 9.07 73,300
1942 1942-05-24 13.17 139,000
1943 1942-10-17 26.88 447,000
1944 1944-05-09 9.43 77,800
1945 1945-09-20 13.88 138,000
1946 1946-06-04 9.47 69,000
1947 1947-03-17 7.53 43,900
1948 1948-04-16 10.69 97,300
1949 1949-06-20 13.00 135,000
1950 1950-02-03 10.01 77,200
1951 1950-12-06 13.85 140,000
1952 1952-04-29 14.17 148,000
1953 1952-11-23 13.76 140,000
1954 1954-03-03 12.47 116,000
1955 1955-08-20 17.60 216,000
1956 1956-07-21 10.75 72,500
1957 1957-04-07 11.40 78,600
1958 1958-05-07 12.02 82,100
1959 1959-06-04 9.61 61,400
1960 1960-05-10 13.66 124,000
1961 1961-02-21 13.15 116,000
1962 1962-03-23 13.43 120,000
1963 1963-03-21 13.91 128,000
1964 1964-03-06 11.85 94,800
1965 1965-03-07 9.98 111,000
1966 1966-02-15 9.04 88,700
1967 1967-03-09 11.48 147,000
1968 1968-03-18 8.71 81,400
1969 1969-03-27 5.75 30,600
1970 1970-04-03 9.34 95,600
1971 1971-02-24 9.15 91,200
1972 1972-06-24 22.03 359,000
1973 1972-10-08 9.08 90,800
1974 1973-12-28 10.36 120,000
1975 1975-09-27 13.39 195,000
1976 1976-01-03 9.59 103,000
1977 1976-10-11 13.18 208,000
1978 1978-03-16 10.83 153,000
1979 1979-02-26 13.12 206,000
1980 1979-10-12 8.15 81,700
1981 1981-04-15 6.95 55,000
1982 1982-06-15 8.91 102,000
1983 1983-04-26 9.81 128,000
1984 1984-02-16 13.73 222,000
1985 1985-02-14 9.08 106,000
1986 1985-11-07 17.99 317,000
1987 1987-04-19 11.41 167,000
1988 1988-05-20 9.83 129,000
1989 1989-05-18 9.10 107,000
1990 1990-05-31 7.24 61,000
1991 1990-10-25 8.94 102,000
1992 1992-04-24 9.07 106,000
1993 1993-03-06 12.35 189,000
1994 1994-03-30 10.37 142,000
1995 1995-01-17 8.90 101,000
1996 1996-01-21 19.29 347,000
1997 1996-12-03 9.02 105,000
1998 1998-03-22 10.79 152,000
1999 1999-03-20 6.51 46,400
2000 2000-02-21 7.36 63,500
2001 2001-03-23 7.88 75,200
2002 2002-04-24 6.97 55,400
2003 2003-09-21 11.44 167,000
2004 2003-12-12 10.87 154,000
2005 2005-03-30 10.28 140,000
2006 2006-06-29 8.34 86,500
2007 2007-04-17 9.43 116,000
2008 2008-05-13 10.04 135,000
2009 2009-05-06 9.67 124,000
2010 2010-03-15 12.82 199,000
2011 2011-04-18 11.69 173,000
2012 2011-12-09 8.48 90,000
2013 2012-10-31 10.33 141,000
2014 2014-05-17 11.70 162,000
2015 2015-04-22 7.39 62,000
2016 2016-02-05 9.84 119,000
2017 2017-05-07 8.30 81,300
2018 2018-06-05 12.47 175,000
2019 2018-12-17 11.65 156,000
2020 2020-05-02 8.85 88,300
2021 2021-03-02 9.27 97,600R
2022 2022-05-08 10.16 118,000
2023 2022-12-24 6.59 44,800
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  Peak Gage-Height Qualification Codes.
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  Peak Streamflow Qualification Codes.