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 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: 07:20 AM Nov 12, 2013