Unadilla River at Rockdale, Chenango County NY (RCKN6)
Gage Location: Chenango County, New YorkSite Location: Chenango County, New York
Latitude: 42.378Longitude: -75.406Elevation: 992.25 ft. MSLDrainage Area: 520 Sq. Mi.
Minor Stage: 11 ft. Moderate Stage: 12 ft.Major Stage: 13 ft.
First Flood: 1932-10-07Last Flood: 2011-09-08 Crest: 14.22 ft.Datum change: 1937-01-29Number of Floods: 31

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Date of FloodCrest(ft)Streamflow(cfs)CategoryCode
1932-10-071110400MinorC1 G1
1940-04-0111.9213400Minornone
1940-04-0911.1611400Minornone
1942-12-3112.9817400Moderatenone
1943-03-1812.0714100Moderatenone
1944-03-181110600Minornone
1948-03-2111.8612800Minornone
1950-09-0211.7712500Minornone
1956-04-0611.5413100Minornone
1959-01-2211.3612700Minornone
1960-04-0111.3312600Minornone
1960-04-0511.6113300Minornone
1961-02-2611.5413100Minornone
1962-04-0111.0411800Minornone
1963-03-2711.1212100Minornone
1964-03-0612.315200Moderatenone
1977-03-1412.6416200Moderatenone
1977-10-1811.6313400Minornone
1979-03-0612.6216300Moderatenone
1983-12-1411.613400Minornone
1984-02-1611.4813000Minornone
1986-03-1611.4713000Minornone
1993-03-3111.612700Minornone
1993-04-1111.8914000Minornone
1996-01-1912.2413900ModerateC5 F1 F3
1998-01-0911.1612000Minornone
2000-02-2811.8113800Minornone
2001-04-1011.0411600Minornone
2005-04-0311.8313900Minornone
2006-06-2813.9623100Majornone
2011-09-0814.2221100Majornone



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