Chemung River at Elmira, Chemung County NY (CHEN6)
Gage Location: Chemung County, New York	Site Location: Chemung County, New York
Latitude: 42.086	Longitude: -76.801	Elevation: 833.65 ft. MSL	Drainage Area: 2162 Sq. Mi.
Minor Stage: 12 ft.	Moderate Stage: 15 ft.	Major Stage: 19 ft.
First Flood: 1889-06-01	Last Flood: 2007-03-15 Crest: 13.17 ft.	Datum change: 1987-10-19	Number of Floods: 33

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MINOR FLOODS Date of Flood Crest(ft) 1953-03-25 14.1 1954-03-02 12.9 1960-04-01 14.5 1989-05-11 12.06 1990-10-24 12.7 1993-04-01 12.43 1994-03-25 14.06 1998-01-08 13.18 2003-07-23 12.23 2004-09-09 12.85 2004-09-18 13.59 2005-04-03 13.17 2005-11-30 12.47 2006-09-03 12.19 2007-03-15 13.17

MODERATE FLOODS Date of Flood Crest(ft) 1935-07-09 18.3 1940-04-01 17.8 1942-03-10 15.9 1942-12-31 17.4 1947-04-06 15.8 1948-05-22 15.3 1950-05-29 16.1 1950-11-26 16.4 1951-03-31 16.6 1955-10-15 17.2 1956-03-07 16.1 1964-03-06 15.6 1996-01-20 18.51 1996-11-08 15.9

MAJOR FLOODS Date of Flood Crest(ft) 1946-05-28 21.2 1972-06-23 25.2 1975-09-26 19.7

MISSING Date of Flood Crest(ft) 1889-06-01 -9999

Categorical Floods by Month Month Minor After Datum Minor Total Moderate After Datum Moderate Total Major After Datum Major Total Missing After Datum Missing Total January 1 1 1 1 0 0 0 0 February 0 0 0 0 0 0 0 0 March 2 4 0 4 0 0 0 0 April 2 3 0 2 0 0 0 0 May 1 1 0 2 0 1 0 0 June 0 0 0 0 0 1 0 1 July 1 1 0 1 0 0 0 0 August 0 0 0 0 0 0 0 0 September 3 3 0 0 0 1 0 0 October 1 1 0 1 0 0 0 0 November 1 1 1 2 0 0 0 0 December 0 0 0 1 0 0 0 0

Categorical Floods by Season Season Minor Moderate Major Missing Fall 5 3 1 0 Winter 1 2 0 0 Spring 8 8 1 0 Summer 1 1 1 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