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

Click on table headers to sort

Date of Flood Crest(ft) Streamflow(cfs) Category Code 1932-10-07 11 10400 Minor *** (5) 1940-04-01 11.92 13400 Minor none 1940-04-09 11.16 11400 Minor none 1942-12-31 12.98 17400 Moderate none 1943-03-18 12.07 14100 Moderate none 1944-03-18 11 10600 Minor none 1948-03-21 11.86 12800 Minor none 1950-09-02 11.77 12500 Minor none 1956-04-06 11.54 13100 Minor none 1959-01-22 11.36 12700 Minor none 1960-04-01 11.33 12600 Minor none 1960-04-05 11.61 13300 Minor none 1961-02-26 11.54 13100 Minor none 1962-04-01 11.04 11800 Minor none 1963-03-27 11.12 12100 Minor none 1964-03-06 12.3 15200 Moderate none 1977-03-14 12.64 16200 Moderate none 1977-10-18 11.63 13400 Minor none 1979-03-06 12.62 16300 Moderate none 1983-12-14 11.6 13400 Minor none 1984-02-16 11.48 13000 Minor none 1986-03-16 11.47 13000 Minor none 1993-03-31 11.6 12700 Minor none 1993-04-11 11.89 14000 Minor none 1996-01-19 12.24 13900 Moderate (E) (1) 1998-01-09 11.16 12000 Minor none 2000-02-28 11.81 13800 Minor none 2001-04-10 11.04 11600 Minor none 2005-04-03 11.83 13900 Minor none 2006-06-28 13.96 23100 Major none 2011-09-08 14.22 24300 Major none

MARFC Codes
Code Description
(!!!) Datum changed during this year.
(1) Backwater Effect.
(2) 15.77 ft also occurred on 11/25/1950 but only counted as one flood.
(3) Estimated from currrent USGS rating table.
(4) Estimated height from the USGS.
(5) Gage height at a different site and/or datum
(6) Discharge affected by Regulation or Diversion
(7) Due to changes, prior floods were based on present flood stage. Therefore, flood data could possibly be incomplete.
(8) Gage is a staff gage and not the offical USGS gage. Therefore, some floods may be missing from our study.
(9) Discharge effected by snow-melt, ice jam or debris jam break up
(A) Discharge affected to unknown degree by regulation or diversion.
(B) Month or day of occurrence is unknown or not exact.
(C) All or part of the record affected by urbanization, mining, agricultural changes, channelization, or other factors.
(D) Crest height adjusted to current datum.
(E) Estimated discharge.
(F) Only annual maximum peak available for this year.
(O) This flood occurred at a previous flood stage that is lower than the current flood stage. This is only a historical flood.
** Crest information looks reasonable despite potential problems. This data was used in our study.
*** Crest information looks unreliable and incomplete and was not used in our flood frequency study.
**** Gauge was discontinued in 2004. 2004 and later was not used in our study.
none No code

Updated: 08:58 AM Jun 28, 2012