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 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: 07:20 AM Nov 12, 2013