West Branch Susquehanna River at Montgomery, Lycoming County PA (MTGP1)
Gage Location: Lycoming County, PennsylvaniaSite Location: Lycoming County, Pennsylvania
Latitude: 41.1694Longitude: -76.8747Elevation: 983.96 ft. MSLDrainage Area: 298 Sq. Mi.
Minor Stage: 20 ft. Moderate Stage: 24 ft.Major Stage: 28 ft.
First Flood: 1865-03-17Last Flood: 2011-09-08 Crest: 26.7 ft.Datum change: 1865-01-01Number of Floods: 43

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Date of FloodCrest(ft)Streamflow(cfs)CategoryCode
1865-03-1726.7-9999ModerateG2
1889-06-0133.1-9999MajorG2
1891-02-1922-9999ModerateG2
1894-05-2130.7-9999MajorG2
1898-03-2422-9999ModerateG2
1901-12-1522-9999ModerateG2
1909-05-0121-9999MinorG2
1913-03-2721-9999MinorG2
1916-03-2921-9999MinorG2
1916-06-1721-9999MinorG2
1918-02-2121-9999MinorG2
1919-05-2221-9999MinorG2
1920-03-1321-9999MinorG2
1923-03-0522-9999ModerateG2
1936-03-1224-9999ModerateG2
1936-03-1836-9999MajorG2
1940-04-0123-9999ModerateG2
1946-05-2830.3-9999MajorG2
1948-04-1521-9999MinorG2
1950-11-2628.8-9999MajorG2
1954-03-0320-9999MinorG2
1956-03-0921.3-9999MinorG2
1959-01-2221.9-9999MinorG2
1960-04-0123-9999ModerateG2
1961-02-2623.1-9999ModerateG2
1964-03-1128.8-9999MajorG2
1972-06-2337.5-9999MajorG2
1975-02-2624.05-9999ModerateG2
1975-09-2628.05-9999MajorG2
1979-03-0625.8-9999ModerateG2
1981-02-2420-9999MinorG2
1984-02-1527.1-9999ModerateG2
1984-04-0721.4-9999MinorG2
1993-04-0222.3-9999MinorG2
1994-08-1920.5-9999MinorG2
1996-01-2028.5-9999MajorG2
2004-09-1928.8-9999MajorG2
2005-04-0320.3-9999MinorG2
2010-01-2621.59999MinorG2
2010-12-0224.5-9999ModerateG2
2011-03-1122.7-9999MinorG2
2011-04-2822.2-9999MinorG2
2011-09-0826.7-9999ModerateG2



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: 08:00 PM May 28, 2014