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Peak Streamflow for Pennsylvania

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[!] Over the next year, the USGS Pennsylvania Water Science Center will be updating the geodetic vertical elevation (gage datum) for many locations. Click HERE for additional information including a current list of streamgages with upcoming datum changes. This update in gage datum does not affect the location of the streamgage, nor the observed local gage height or discharge recorded at the streamgage.


USGS 01578310 SUSQUEHANNA RIVER AT CONOWINGO, MD

Harford County, Maryland
Hydrologic Unit Code 02050306
Latitude  39°39'28.4", Longitude  76°10'28.0" NAD83
Drainage area 27,100  square miles
Gage datum 4.16 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)
1968 1968-03-25 22.46 238,0006
1969 1968-11-20 20.14 160,0006
1970 1970-02-04 26.40 434,0006
1971 1971-02-22 22.58 243,0006
1972 1972-06-24 36.83 1,130,0006
1973 1972-12-09 22.74 250,0006
1974 1974-04-05 22.35 235,0006
1975 1975-09-27 30.92 710,0006
1976 1976-01-28 24.65 338,0006
1977 1976-10-10 23.99 306,0006
1978 1978-01-28 25.64 377,0006
1979 1979-03-07 28.04 499,0006
1980 1980-03-23 22.45 240,0006
1981 1981-02-25 25.18 355,0006
1982 1982-02-05 23.02 261,0006
1983 1983-04-17 23.31 273,0006
1984 1984-02-16 28.08 501,0006
1985 1985-04-04 19.94 158,0006
1986 1986-03-16 26.17 403,0006
1987 1987-04-07 23.13 266,0006
1988 1988-02-04 21.64 211,0006
1989 1989-05-18 23.48 280,0006
1990 1990-02-06 20.55 176,0006
1991 1990-10-26 23.03 262,0006
1992 1992-03-30 21.22 197,0006
1993 1993-04-02 28.06 500,0006
1994 1994-03-26 26.16 403,0006
1995 1995-01-22 21.74 214,0006
1996 1996-01-20 34.18 909,0006
1997 1996-11-11 24.04 303,0006
1998 1998-01-10 25.55 372,0006
1999 1999-01-26 22.90 257,0006
2000 2000-02-29 22.12 228,0006
2001 2001-04-12 20.36 170,0006
2002 2002-05-15 21.62 224,0006
2003 2003-03-22 24.15 308,0006
2004 2004-09-19 30.07 620,0006
2005 2005-04-04 26.70 430,0006
2006 2006-06-29 27.31 461,0006
2007 2007-03-17 23.04 273,0006
2008 2008-03-06 25.64 379,0006
2009 2008-12-31 18.97 146,0006
2010 2010-01-27 24.37 325,0006
2011 2011-09-09 32.41 778,0006
2012 2011-10-01 21.13 208,0006
2013 2013-02-02 21.60 223,0006
2014 2014-05-19 20.36 185,0006
2015 2015-04-12 20.04 175,0006
2016 2016-02-27 20.32 188,0006
2017 2017-05-08 20.45 192,0006
2018 2018-07-26 26.08 402,0006
2019 2018-11-28 21.52 225,0006
2020 2020-05-02 22.32 252,0006
2021 2021-09-02 24.29 335,0006,R
2022 2022-02-20 20.68 214,0006,R
2023 2023-05-02 20.24 201,0006
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  Peak Streamflow Qualification Codes.