Chemung River at Chemung, Chemung County NY (CMGN6)
Gage Location: Chemung County, New York	Site Location: Chemung County, New York
Latitude: 42.002	Longitude: -76.635	Elevation: 778.63 ft. MSL	Drainage Area: 2506 Sq. Mi.
Minor Stage: 16 ft.	Moderate Stage: 20 ft.	Major Stage: 24 ft.
First Flood: 1904-03-08	Last Flood: 2007-03-15 Crest: 16.63 ft.	Datum change: 1930-01-10	Number of Floods: 57

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Date of Flood Crest(ft) Streamflow(cfs) Category Code 1904-03-08 17.6 63200 Minor C1 1910-04-25 16.76 57000 Minor C1 1913-03-26 16.5 52500 Minor C1 1914-03-29 17 59900 Minor C1 1914-05-13 16.35 55200 Minor C1 1915-02-25 16.42 55700 Minor C1 1916-03-28 16.53 56500 Minor C1 1916-06-18 18.2 68900 Minor C1 1918-03-15 17.96 67000 Minor C1 1919-05-23 16.78 58300 Minor C1 1920-03-13 17.18 61200 Minor C1 1929-04-21 17.1 57400 Minor C1 1935-07-09 19.45 86000 Minor none 1936-03-12 19.57 87300 Minor none 1936-03-18 18.61 76700 Minor none 1939-02-21 17.8 68000 Minor none 1940-04-01 19.62 87800 Minor none 1940-04-04 17.83 68300 Minor none 1941-04-06 16.92 55300 Minor none 1942-03-10 17.47 60700 Minor none 1942-12-31 19.04 77400 Minor none 1945-03-04 16.79 54100 Minor none 1946-05-28 23.97 132000 Moderate none 1947-04-06 18.01 66500 Minor none 1947-06-04 16.1 49200 Minor none 1948-03-22 18.26 69300 Minor none 1950-03-29 19.12 80300 Minor none 1950-11-26 18.66 74100 Minor none 1951-03-31 19.19 81300 Minor none 1952-03-12 17.17 54300 Minor none 1953-03-25 16.09 46000 Minor none 1955-10-15 20.13 89000 Moderate none 1956-03-08 19.22 76100 Minor none 1956-04-05 16.02 45500 Minor none 1958-04-07 16.94 52400 Minor none 1959-01-22 17.9 61000 Minor none 1960-03-31 19.02 73500 Minor none 1961-02-26 17.39 56300 Minor none 1961-04-26 18.24 64400 Minor none 1964-03-06 20.44 93800 Moderate none 1972-03-03 17.53 52000 Minor none 1972-06-23 31.62 189000 Major F3 1975-02-26 17 52000 Minor none 1975-09-27 24.1 125000 Major none 1976-02-18 17.07 52500 Minor none 1978-03-22 16.25 47200 Minor F2 1979-03-06 18.24 61500 Minor F2 1984-02-15 18.2 61200 Minor F2 1984-04-06 17.25 54100 Minor F2 1994-02-22 18.97 -9999 Minor F2 1994-03-25 16.45 48600 Minor F2 1996-01-20 19.71 77800 Minor F2 1996-11-09 18.52 67500 Minor F2 2004-09-10 16.05 49500 Minor F2 2004-09-18 18.45 66900 Minor F2 2005-04-03 17.4 58600 Minor F2 2007-03-15 16.63 53300 Minor F2

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