Tioughnioga River at Cortland, Cortland County NY (CRTN6)
Gage Location: Cortland County, New York	Site Location: Cortland County, New York
Latitude: 42.324	Longitude: -75.772	Elevation: 1084.92 ft. MSL	Drainage Area: 292 Sq. Mi.
Minor Stage: 8 ft.	Moderate Stage: 10 ft.	Major Stage: 12.5 ft.
First Flood: 1939-02-21	Last Flood: 2013-02-01 Crest: 8.36 ft.	Datum change: 1963-10-01	Number of Floods: 110

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Year Before Datum Change Number of Floods 1939 1 1940 3 1941 1 1942 3 1943 1 1944 1 1945 2 1946 1 1947 3 1948 3 1949 1 1950 3 1951 1 1952 1 1953 1 1954 1 1955 2 1956 2 1957 1 1958 1 1959 2 1960 2 1961 1 1962 1

Year After Datum Change Number of Floods 1963 1 1964 1 1965 0 1966 0 1967 0 1968 1 1969 1 1970 2 1971 1 1972 4 1973 0 1974 1 1975 2 1976 3 1977 4 1978 2 1979 2 1980 1 1981 2 1982 0 1983 2 1984 2 1985 0 1986 1 1987 0 1988 1 1989 0 1990 1 1991 0 1992 0 1993 3 1994 2 1995 0 1996 3 1997 0 1998 1 1999 1 2000 2 2001 2 2002 0 2003 2 2004 2 2005 2 2006 2 2007 2 2008 3 2009 1 2010 2 2011 5 2012 0 2013 1

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