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Peak Streamflow for the Nation

USGS 01661500 ST MARYS RIVER AT GREAT MILLS, MD

St. Mary'S County, Maryland
Hydrologic Unit Code 02070011
Latitude  38°14'30.3", Longitude  76°30'13.2" NAD83
Drainage area 24.0  square miles
Gage datum 6.86 feet above NAVD88
Output formats
Table
Graph
Tab-separated file
peakfq (watstore) format
Reselect output format
Water
Year		 Date Gage
Height
(feet)		 Stream-
flow
(cfs)
1947 1947-04-16 5.73 420
1948 1948-08-04 9.32 1,560
1949 1949-07-16 9.91 2,020
1950 1949-10-31 7.67 659
1951 1951-08-08 6.63 520
1952 1952-01-29 7.44 620
1953 1953-08-14 7.68 656
1954 1954-01-27 4.55 296
1955 1955-08-13 11.77 4,350
1956 1956-06-02 4.22 263
1957 1956-11-02 10.66 2,780
1958 1958-08-25 10.87 3,030
1959 1959-07-15 7.09 580
1960 1960-07-30 12.08 4,900
1961 1961-01-01 7.66 712
1962 1962-01-07 7.96 798
1963 1963-06-03 9.15 1,440
1964 1964-02-16 6.18 473
1965 1965-03-05 4.98 341
1966 1966-09-21 5.64 413
1967 1966-10-19 8.15 870
1968 1968-01-14 6.78 696
1969 1969-08-20 13.34 7,950
1970 1969-12-26 5.26 457
1971 1971-05-30 8.79 1,280
1972 1972-06-22 9.75 1,890
1973 1973-02-02 7.35 828
1974 1974-03-31 5.98 559
1975 1975-03-19 7.02 804
1976 1976-01-28 6.32 676
1977 1977-06-18 3.50 265
1978 1978-01-18 7.62 934
1979 1979-02-25 10.97 3,160
1980 1980-07-23 4.58 408
1981 1981-05-11 3.39 252
1982 1982-06-05 5.15 491
1983 1983-04-16 8.63 1,230
1984 1984-05-30 9.66 1,820
1985 1985-09-27 10.93 3,110
1986 1985-11-30 5.85 597
1987 1986-12-25 7.36 877
1988 1988-02-12 5.86 598
1989 1989-07-16 7.76 968
1990 1990-05-29 10.28 2,360
1991 1991-01-12 6.15 664
1992 1992-09-06 9.95 2,050
1993 1993-03-13 8.25 1,100
1994 1994-03-03 11.21 3,470
1995 1995-03-09 4.66 459
1996 1996-07-13 8.61 1,230
1997 1996-10-19 6.96 803
1998 1998-02-05 11.27 3,560
1999 1999-09-16 12.82 6,560
2000 2000-07-26 8.64 1,240
2001 2001-08-13 5.78 607
2002 2002-04-28 3.29 242
2003 2003-05-26 6.96 803
2004 2004-07-28 9.37 1,610
2005 2005-04-02 6.31 689
2007 2007-03-17 7.98 1,020
2008 2008-06-05 9.51 1,710
2009 2009-05-08 4.81 481
2010 2010-09-30 10.782 2,920
2011 2011-08-28 12.98 6,960
2012 2012-09-02 5.65 587
2013 2012-10-30 8.96 1,350
2014 2013-12-09 4.31 400
2015 2015-06-28 6.93 797
2016 2016-02-25 6.97 805
2017 2017-07-06 6.77 768
2018 2018-05-18 8.34 1,130
2019 2019-07-08 7.45 902
2020 2020-08-04 11.57 3,900
2021 2020-11-12 11.46 3,830
2022 2022-07-25 6.99 809
2023 2023-05-01 7.37 886
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  Peak Gage-Height Qualification Codes.