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Peak Streamflow for the Nation

USGS 01100000 MERRIMACK RIVER BL CONCORD RIVER AT LOWELL, MA

Middlesex County, Massachusetts
Hydrologic Unit Code 01070006
Latitude  42°38'45", Longitude  71°17'56" NAD27
Drainage area 4,635  square miles
Contributing drainage area 4,421  square miles
Gage datum 4.37 feet above NAVD88
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peakfq (watstore) format
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Water
Year
Date Gage
Height
(feet)
Stream-
flow
(cfs)
1852 1852-04-23 60.60 108,0006,7
1924 1924-04-08 53.40 55,7006
1925 1925-03-31 53.30 55,0006
1926 1926-04-27 50.60 39,3006
1927 1927-03-17 49.70 34,3006
1928 1927-11-05 56.50 76,8006
1929 1929-05-05 50.20 37,0006
1930 1930-04-09 48.70 29,0006
1931 1931-06-11 50.00 35,9006
1932 1932-04-14 52.60 50,7006
1933 1933-04-20 56.00 72,6006
1934 1934-04-14 54.02 59,6006
1935 1935-01-11 52.40 49,5006
1936 1936-03-20 68.405 173,0006
1937 1937-05-16 50.70 39,8006
1938 1938-09-23 60.57 121,0006
1939 1939-04-21 51.56 48,6006
1940 1940-04-14 52.93 55,8006
1941 1941-02-10 46.66 19,9006
1942 1942-06-17 48.13 27,0006
1943 1943-05-14 48.00 27,4006
1944 1944-06-26 51.77 49,2006
1945 1945-03-22 50.14 39,5006
1946 1945-12-09 49.77 36,1006
1947 1947-04-14 48.89 31,3006
1948 1948-03-23 52.28 51,7006
1949 1949-01-08 47.65 24,6006
1950 1950-04-22 49.53 34,8006
1951 1951-04-05 52.63 53,9006
1952 1952-04-07 52.59 53,7006
1953 1953-03-28 52.93 56,0006
1954 1954-05-11 51.70 47,9006
1955 1954-12-20 48.27 27,9006
1956 1956-05-01   46,9002,6
1957 1957-01-25 46.16 17,2006
1958 1958-04-25 49.82 36,4006
1959 1959-04-05 51.62 47,4006
1960 1960-04-06 56.00 79,0006
1961 1961-04-25   32,0002,6
1962 1962-04-02 52.30 51,8006
1963 1963-04-04 49.91 37,0006
1964 1964-04-16 49.39 34,1006
1965 1965-04-18 46.22 18,1006
1966 1966-03-27 47.73 25,6006
1967 1967-04-04 50.35 39,6006
1968 1968-03-23 51.15 44,4006
1969 1969-04-24 51.14 44,3006
1970 1970-02-12 50.87 42,7006
1971 1971-04-15 48.93 31,7006
1972 1972-04-21 50.08 36,6006
1973 1973-04-04 51.47 44,8006
1974 1973-12-23 51.75 46,6006
1975 1975-03-22 49.79 35,0006
1976 1976-04-03 51.27 42,0006
1977 1977-03-15 53.41 58,0006
1978 1978-01-28 52.262 50,0006
1979 1979-03-09 51.22 43,3006
1980 1980-04-12 50.80 40,7006
1981 1981-02-27 51.91 47,8006
1982 1982-04-20 50.02 36,4006
1983 1983-03-21 52.67 53,0006
1984 1984-06-01 53.71 60,5006
1985 1985-03-14 47.66 24,3006
1986 1986-01-29 51.11 42,6006
1987 1987-04-07 57.16 84,7006
1988 1988-05-01 49.98 36,2006
1989 1989-05-08 49.81 35,3006
1990 1990-03-19 50.26 37,7006
1991 1990-10-25 49.20 32,1006
1992 1992-03-29 47.74 24,7006
1993 1993-04-01 52.31 50,0006
1994 1994-04-17 49.44 33,3006
1995 1994-12-26 49.10 31,5006
1996 1996-04-18 53.05 54,8006
1997 1996-10-22 53.10 48,6006
1998 1998-06-18 52.74 50,4006
1999 1999-09-19 49.69 33,6006
2000 2000-04-25 49.72 33,8006
2001 2001-04-15 50.95 40,2006
2002 2002-05-15 48.05 25,7006
2003 2003-03-31 50.38 37,2006
2004 2004-04-03 52.80 50,8006
2005 2005-04-04 52.77 50,6006
2006 2006-05-15 58.84 96,4006
2007 2007-04-17 58.09 89,8006
2008 2008-03-10 50.53 37,8006
2009 2008-12-13 50.74 39,0006
2010 2010-04-01 54.64 63,4006
2011 2011-03-09 50.79 39,2006
2012 2011-12-09 49.89 34,4006
2013 2012-11-01 48.67 28,2006
2014 2014-04-01 50.73 37,8006
2015 2014-12-12 49.11 29,1006
2016 2016-02-27 50.25 35,1006
2017 2017-04-08 50.25 35,1006
2018 2017-10-31 50.51 36,5006
2019 2019-04-28 51.25 40,700
2020 2019-12-16 50.37 35,800
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  Peak Gage-Height Qualification Codes.
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  Peak Streamflow Qualification Codes.