North Branch Potomac River near Cumberland, Allegany County MD (CBEM2)
Gage Location: Allegany County, MarylandSite Location: Allegany County, Maryland
Latitude: 39.622Longitude: -78.773Elevation: 585.22 ft. MSLDrainage Area: 877 Sq. Mi.
Minor Stage: 17 ft. Moderate Stage: 21 ft.Major Stage: 23 ft.
First Flood: 1889-06-01Last Flood: 2010-03-13 Crest: 17.46 ft.Datum change: 1929-06-18Number of Floods: 29

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Date of FloodCrest(ft)Streamflow(cfs)CategoryCode
1889-06-0129.289000MajorC1 F1
1924-03-2928.482000MajorC1 F1
1932-05-1319.228200Minornone
1933-03-1417.823400Minornone
1936-03-1729.188200Majornone
1937-04-2624.251700Majornone
1937-10-2825.157400Majornone
1942-10-1524.0450500Majornone
1942-12-3017.1222200Minornone
1951-06-1317.6523100MinorF2
1954-10-1623.8538500MajorF2
1955-08-1822.634300ModerateF2
1960-03-3117.3422200MinorF2
1960-05-0817.3622200MinorF2
1961-02-2618.8425300MinorF2
1963-03-0517.9623500MinorF2
1963-03-2017.4222600MinorF2
1964-04-2919.4826600MinorF2
1967-03-0718.9125400MinorF2
1970-04-0217.2522200MinorF2
1978-07-0417.8523500MinorF2
1984-04-0517.623100MinorF2
1985-11-0518.8525500MinorF2
1993-04-1619.0525900MinorF2
1996-01-1925.5659200MajorF2
1996-09-0722.55-9999ModerateF2
2005-03-2917.8824100MinorF2
2009-05-0417.4323500MinorF2
2010-03-1317.4623500MinorF2



Codes and description

C1|Crest information during this period may be incomplete and therefore was not used in frequency calculations. Some of the floods are based on current flood stage and nearby gage information.
C2|Crest information during this period 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: 01:25 PM Jul 21, 2014