North Branch Susquehanna River at Unadilla, Otsego County NY (UNDN6)
Gage Location: Otsego County, New YorkSite Location: Otsego County, New York
Latitude: 42.322Longitude: -75.317Elevation: 997.25 ft. MSLDrainage Area: 982 Sq. Mi.
Minor Stage: 11 ft. Moderate Stage: 13 ft.Major Stage: 14.5 ft.
First Flood: 1935-07-08Last Flood: 2011-09-08 Crest: 16.34 ft.Datum change: 1938-07-01Number of Floods: 56

Click on table headers to sort
Date of FloodCrest(ft)Streamflow(cfs)CategoryCode
1935-07-081629000MajorC1 C8
1936-03-1816.631300MajorC1
1938-09-2213.7621000Moderatenone
1939-02-2111.915600Minornone
1940-03-3113.5420300Moderatenone
1940-04-0912.2516500Minornone
1942-03-1812.0916100Minornone
1942-12-3013.9421500Moderatenone
1943-05-1811.8615500Minornone
1944-03-1811.4814400Minornone
1946-03-0811.1813700Minornone
1946-05-2811.0813400Minornone
1947-04-0611.1513600Minornone
1948-03-1711.2113700Minornone
1948-03-2213.1819200Moderatenone
1948-12-3111.4914500Minornone
1950-03-2911.4614400MinorF2
1955-10-1711.0911800MinorF2
1956-03-0911.0612600MinorF2
1956-04-0612.3816000MinorF2
1956-04-1711.3213300MinorF2
1958-04-0811.7114200MinorF2
1959-01-2213.4217000ModerateC5 F2
1959-11-2911.7914400MinorF2
1960-04-0111.9714900MinorF2
1960-04-0414.2521200ModerateF2
1961-02-2611.6614100MinorF2
1962-04-0212.8317200MinorF2
1963-03-2712.6216600MinorF2
1964-03-0613.1718200ModerateF2
1977-03-1414.6423500MajorF2
1977-03-3111.1813600MinorF2
1977-09-2111.8215200MinorF2
1977-10-1814.1321900ModerateF2
1979-03-0613.921200ModerateF2
1980-03-2211.3413900MinorF2
1983-04-2611.2313600MinorF2
1983-05-0311.1513400MinorF2
1986-03-1613.1819000ModerateF2
1987-04-0511.4714300MinorF2
1993-03-3113.4919900ModerateF2
1993-04-1111.4714300MinorF2
1996-01-1914.2417100ModerateC5 F1 F2 F3
1996-11-1011.6814800MinorF2
1998-01-1013.620300ModerateF2
1999-01-2511.414100MinorF2
2000-02-2812.7317700MinorF2
2001-04-1011.5714800MinorF2
2003-03-2211.4714300MinorF2
2005-04-0313.6820500ModerateF2
2006-06-2917.7235100MajorF2
2008-03-0911.6114700MinorF2
2010-03-2411.2913900MinorF2
2010-10-0211.0713300minorF2
2011-04-2911.3414000MinorF2
2011-09-0816.3429700MajorF2



Codes and description

C1|Crest information during this period may be incomplete and therefore was not used in frequency calculations. Some of the floods are based on current flood stage and nearby gage information.
C2|Crest information during this period 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: 07:31 AM Dec 19, 2014