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Peak Streamflow for the Nation

USGS 01638500 POTOMAC RIVER AT POINT OF ROCKS, MD

Frederick County, Maryland
Hydrologic Unit Code 02070008
Latitude  39°16'24.9", Longitude  77°32'35.2" NAD83
Drainage area 9,651  square miles
Gage datum 199.92 feet above NAVD88
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Tab-separated file
peakfq (watstore) format
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Water
Year		 Date Gage
Height
(feet)		 Stream-
flow
(cfs)
1889 1889-06-02 40.203 460,0007
1895 1895-04-10 10.703 68,500
1896 1896-07-26 9.403 56,000
1897 1896-10-01 27.203 204,000
1898 1898-08-12 18.003 127,000
1899 1899-03-06 18.103 128,000
1900 1900-03-21 9.603 57,700
1901 1901-04-22 22.003 161,000
1902 1902-03-02 29.003 219,000
1903 1903-03-01 16.606 110,000
1904 1904-06-01 8.60 44,500
1905 1905-03-11 11.90 71,400
1906 1906-03-29 13.10 81,300
1907 1907-03-15 17.60 119,000
1908 1908-01-13 21.60 152,000
1909 1909-04-16 13.30 83,000
1910 1910-06-18 23.50 168,000
1911 1911-09-01 16.10 106,000
1912 1912-02-28 14.80 95,400
1913 1913-03-28 20.00 139,000
1914 1914-03-19 12.20 73,900
1915 1915-06-04 20.00 139,000
1916 1916-03-29 18.30 124,000
1917 1917-03-13 18.10 123,000
1918 1918-04-16 18.60 127,000
1919 1919-05-11 13.00 80,500
1920 1920-03-06 16.40 109,000
1921 1921-05-06 14.00 88,800
1922 1922-03-17 12.80 78,800
1923 1923-04-16 8.80 40,700
1924 1924-05-13 32.20 277,000
1925 1925-02-13 15.00 89,000
1926 1926-02-27 11.50 60,500
1927 1926-11-17 15.10 89,900
1928 1928-05-02 21.30 145,000
1929 1929-04-18 24.94 180,000
1930 1929-10-23 17.40 110,000
1931 1931-05-24 8.16 36,800
1932 1932-05-14 23.34 158,000
1933 1933-04-21 19.30 123,000
1934 1934-01-09 8.06 36,700
1935 1934-12-02 19.78 128,000
1936 1936-03-19 41.03 480,000
1937 1937-04-27 33.86 310,000
1938 1937-10-30 24.93 175,000
1939 1939-02-05 19.39 124,000
1940 1940-04-21 15.67 93,600
1941 1941-04-07 12.56 69,000
1942 1942-05-24 21.13 125,000
1943 1942-10-16 40.43 418,000
1944 1944-05-08 13.92 70,300
1945 1945-09-20 21.98 139,000
1946 1946-06-03 11.40 53,100
1947 1947-03-16 9.65 42,100
1948 1948-04-15 16.04 87,000
1949 1949-06-20 21.20 132,000
1950 1950-02-03 13.09 64,700
1951 1950-12-05 20.75 128,000
1952 1952-04-29 20.67 127,000
1953 1952-11-23 19.68 118,000
1954 1954-03-03 18.65 109,000
1955 1955-08-20 29.08 214,000
1956 1956-04-09 12.54 60,800
1957 1957-04-07 13.74 69,200
1958 1958-05-07 14.13 72,000
1959 1959-06-04 11.80 55,700
1960 1960-05-10 20.28 124,000
1961 1961-02-21 17.90 102,000
1962 1962-03-23 19.45 116,000
1963 1963-03-21 20.47 125,000
1964 1964-03-06 16.00 87,000
1965 1965-03-06 17.35 97,800
1966 1966-02-15 14.04 71,300
1967 1967-03-08 22.53 144,000
1968 1968-03-18 14.73 76,800
1969 1969-03-27 7.15 27,800
1970 1970-04-03 16.64 92,100
1971 1971-02-24 15.92 86,400
1972 1972-06-23 37.43 347,000
1973 1972-10-08 18.28 106,000
1974 1973-12-28 21.27 132,000
1975 1975-03-21 26.15 181,000
1976 1976-01-02 18.71 109,000
1977 1976-10-11 27.25 193,000
1978 1978-03-16 22.01 139,000
1979 1979-02-27 25.94 178,000
1980 1979-10-11 13.87 69,500
1981 1981-04-14 9.81 41,900
1982 1982-06-15 16.66 92,000
1983 1983-04-26 19.21 115,000
1984 1984-02-16 28.14 199,000
1985 1985-02-13 15.57 84,700
1986 1985-11-07 36.28 309,000
1987 1987-04-18 23.49 153,000
1988 1988-05-20 17.01 96,100
1989 1989-05-17 15.11 80,900
1990 1990-05-31 9.30 39,800
1991 1991-03-25 15.63 85,000
1992 1992-04-23 16.25 90,000
1993 1993-03-06 24.94 167,000
1994 1993-11-29 19.25 115,000
1995 1995-01-17 15.90 87,200
1996 1996-01-21 36.34 310,000
1997 1996-12-03 15.65 85,200
1998 1998-03-22 20.24 123,000
1999 1999-03-20 9.42 40,600
2000 2000-02-20 12.54 61,600
2001 2001-03-23 13.23 66,600
2002 2002-04-24 11.21 52,300
2003 2003-09-21 23.12 150,000
2004 2003-12-12 19.58 118,000
2005 2005-03-30 19.37 116,000
2006 2005-12-01 14.10 73,100
2007 2007-04-17 17.00 96,000
2008 2008-05-13 16.99 96,000
2009 2009-05-06 17.50 100,000
2010 2010-03-15 25.52 172,000
2011 2011-04-18 22.52 144,000
2012 2011-12-09 14.32 74,800
2013 2012-10-31 18.19 106,000
2014 2014-05-17 22.62 145,000
2015 2015-04-22 11.21 52,300
2016 2016-02-05 16.00 88,000
2017 2017-05-07 13.86 71,300
2018 2018-06-04 25.83 175,000
2019 2018-12-17 22.40 143,000
2020 2020-05-02 14.77 78,300
2021 2021-03-02 16.39 91,100
2022 2022-05-08 18.29 107,000
2023 2023-03-05 8.40 34,700
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  Peak Gage-Height Qualification Codes.
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  Peak Streamflow Qualification Codes.