Potomac River at Paw Paw, Allegany County MD (PAWW2)
Gage Location: Allegany County, MarylandSite Location: Morgan County, West Virginia
Latitude: 39.539Longitude: -78.457Elevation: 487.88 ft. MSLDrainage Area: 3129 Sq. Mi.
Minor Stage: 25 ft. Moderate Stage: 28 ft.Major Stage: 32 ft.
First Flood: 1877-11-24Last Flood: 2011-05-19 Crest: 28.67 ft.Datum change: 1939-03-25Number of Floods: 40

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Date of FloodCrest(ft)Streamflow(cfs)CategoryCode
1877-11-2445-9999MajorC1 C8
1889-06-0145-9999MajorC1 C8
1924-05-1343.5-9999MajorC1 C8
1928-05-0131.4-9999ModerateC1
1936-03-1854240000MajorC1
1939-02-0428.266100ModerateC1
1942-05-2326.9858500Minornone
1942-10-1638.36111000Majornone
1942-12-3026.5256500Minornone
1949-06-1933.9185200Majornone
1951-06-1425.8753400Minornone
1954-03-0225.0650300Minornone
1954-10-1632.2478100Majornone
1955-08-1935.3591600Majornone
1960-03-3125.3651400Minornone
1960-05-0928.2762300Moderatenone
1962-03-2227.0157500Minornone
1963-03-2031.4875000Moderatenone
1964-04-3025.752700Minornone
1967-03-0830.2470000Moderatenone
1972-06-2328.8364500Moderatenone
1973-12-2826.4155300Minornone
1975-03-2027.6659900Minornone
1976-10-1030.5271100Moderatenone
1978-03-1526.4354900Minornone
1979-02-2629.1365300Moderatenone
1983-04-2525.0849900Minornone
1984-02-1527.5459000Minornone
1984-04-0525.7952500Minornone
1985-11-0553.58235000Majornone
1986-03-2027.8654600Minornone
1987-04-1725.9353000Minornone
1993-04-1730.6271300Moderatenone
1996-01-2040.86122000Majornone
1996-09-0743.45140000Majornone
2003-09-2027.9160500Minornone
2005-03-2927.3958500Minornone
2009-05-0525.9453100Minornone
2010-03-1429.1165200Moderatenone
2011-05-1928.6763400Moderatenone



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: 07:31 AM Dec 19, 2014