North Branch Susquehanna River near Waverly, Tioga County NY (WVYN6)
Gage Location: Bradford County, Pennsylvania	Site Location: Tioga County, New York
Latitude: 41.985	Longitude: -76.501	Elevation: 743.96 ft. MSL	Drainage Area: 4773 Sq. Mi.
Minor Stage: 11 ft.	Moderate Stage: 16 ft.	Major Stage: 21.4 ft.
First Flood: 1936-03-18	Last Flood: 2011-09-29 Crest: 12.27 ft.	Datum change: 1937-02-01	Number of Floods: 127

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Year Before Datum Change Number of Floods 1936 1

Year After Datum Change Number of Floods 1937 1 1938 1 1939 1 1940 2 1941 1 1942 2 1943 1 1944 1 1945 2 1946 2 1947 2 1948 3 1949 0 1950 3 1951 1 1952 2 1953 0 1954 1 1955 2 1956 2 1957 1 1958 1 1959 2 1960 3 1961 2 1962 1 1963 1 1964 2 1965 0 1966 1 1967 0 1968 2 1969 0 1970 1 1971 1 1972 3 1973 1 1974 0 1975 3 1976 3 1977 3 1978 3 1979 3 1980 1 1981 2 1982 0 1983 4 1984 2 1985 0 1986 2 1987 0 1988 1 1989 1 1990 2 1991 0 1992 0 1993 2 1994 2 1995 0 1996 2 1997 0 1998 1 1999 1 2000 3 2001 1 2002 1 2003 3 2004 2 2005 4 2006 3 2007 3 2008 4 2009 1 2010 2 2011 9 2012 0 2013 0

Codes and description

C1|Crest information looks unreliable and incomplete and not used in frequency calculations. Some of the floods are based on current flood stage and nearby gage information.
C2|Crest information looks reliable despite potential problems. This data was used in frequency calculations.
C3|Crest height estimated by the USGS.
C4|Crest height is from the National Weather Service.
C5|Crest height affected by backwater.
C6|Crest occurred at a previous flood stage that is lower than the current flood stage. The crests below the new flood stage are not used in flood frequency calculations.
C7|Crest from USGS yearly peak and/or date is different than the crest we provide. In many cases MARFC uses crest based on backwater or ice effects.
C8|Crest month or day of occurrence has been estimated by The Middle Atlantic River Forecast Center usually based on nearby gage information.
C9|Crest date (day) in the month is unknown.
F1|Flow is an estimate.
F2|Flow affected by regulation or diversion and in some cases to an unknown degree.
F3|Flow effected by snow-melt, ice jam or debris jam break up.
F4|Flow affected by dam failure.
F5|Flow - All or part of the record affected by urbanization, mining, agricultural changes, channelization or other factors.
G1|Gage height at a different site and/or datum.
G2|Gage is not an official USGS gage with crests provided by the NWS. Crest information looks unreliable and incomplete and not used in flood frequency calculations.
G3|Gage datum changed during this year.
none,No code; Good Data

Updated: 08:09 AM Feb 08, 2013