Potomac River near Washington DC Little Falls pump station, Montgomery County MD (BRKM2)
Gage Location: Montgomery County, MarylandSite Location: Montgomery County, Maryland
Latitude: 38.949Longitude: -77.128Elevation: 37.95 ft. MSLDrainage Area: 11560 Sq. Mi.
Minor Stage: 10 ft. Moderate Stage: 12 ft.Major Stage: 14 ft.
First Flood: 1932-05-14Last Flood: 2012-10-31 Crest: 10.33 ft.Datum change: 1930-03-01Number of Floods: 91

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Date of FloodCrest(ft)Streamflow(cfs)CategoryCode
1932-05-1415.25168000Majornone
1933-04-1910.1586700Minornone
1933-04-2212.8127000Moderatenone
1933-08-2510.5792700Minornone
1934-12-0213.5139000Moderatenone
1936-02-1710.3745000Minornone
1936-02-2714.69132000Majornone
1936-03-1311.16106000Minornone
1936-03-1928.1484000Majornone
1937-01-2410.594400Minornone
1937-02-2310.5896000Minornone
1937-04-2823.3347000Majornone
1937-08-2710.188300Minornone
1937-10-3015.62181000Majornone
1939-02-0512.6129000Moderatenone
1940-04-2211.29107000Minornone
1942-05-2413.17139000Moderatenone
1942-10-1726.88447000Majornone
1942-12-3113.15139000Moderatenone
1945-09-2013.88138000Moderatenone
1948-02-1610.6975000Minornone
1948-04-1610.6997300Minornone
1949-06-2013135000Moderatenone
1949-07-1910.2691300Minornone
1950-02-0310.0177200Minornone
1950-12-0613.85140000Moderatenone
1950-12-0912.48117000Moderatenone
1951-06-1512.09110000Moderatenone
1952-03-1311.95108000Minornone
1952-04-2914.17148000Majornone
1952-11-2313.76140000Moderatenone
1953-03-2611.4499100Minornone
1954-03-0312.47116000Moderatenone
1954-10-1713.3131000Moderatenone
1955-03-2311.4799500Minornone
1955-08-2017.6216000Majornone
1956-04-0910.4668600Minornone
1956-07-2110.7572500Minornone
1957-02-1211.174300Minornone
1957-04-0711.478600Minornone
1958-03-0110.1849000Minornone
1958-03-2911.1967200Minornone
1958-05-0712.0282100Moderatenone
1960-04-0112.29102000Moderatenone
1960-04-0613.35119000Moderatenone
1960-05-1013.66124000Moderatenone
1961-02-2113.15116000Moderatenone
1961-02-2712.23101000Moderatenone
1961-04-1411.7192600Minornone
1961-04-1810.3773200Minornone
1962-03-0111.0582800Minornone
1962-03-1411.4288300Minornone
1962-03-2313.43120000Moderatenone
1963-03-0712.87111000Moderatenone
1963-03-1511.6491600Minornone
1963-03-2113.91128000Moderatenone
1964-03-0611.8594800Minornone
1964-05-0111.5990800Minornone
1967-03-0911.48147000Minornone
1972-06-2422.03359000Majornone
1973-12-2810.36120000Minornone
1975-03-2112.23166000Moderatenone
1975-09-2713.39195000Moderatenone
1976-10-1113.18208000Moderatenone
1978-01-2810.47145000Minornone
1978-03-1610.83153000Minornone
1979-02-2613.12206000Moderatenone
1984-02-1613.73222000Moderatenone
1984-03-3010.74151000Minornone
1985-11-0717.99317000Majornone
1986-03-1610.09136000Minornone
1987-04-1911.41167000Minornone
1993-03-0612.35189000Moderatenone
1993-03-2510.16138000Minornone
1993-04-1810.55147000Minornone
1993-11-2910.09136000Minornone
1994-03-3010.37142000Minornone
1996-01-2119.29347000Majornone
1996-09-0817.84314000Majornone
1998-01-1010.43144000Minornone
1998-03-2210.79152000Minornone
2003-09-2111.44167000Minornone
2003-12-1210.87154000Minornone
2005-03-3010.28140000Minornone
2008-05-1310.04135000Minornone
2010-01-2710.98157000Minornone
2010-03-1512.82199000Moderatenone
2011-03-1210.88154000Minornone
2011-04-1811.69173000Minornone
2011-05-1911.4166000Minornone
2012-10-3110.33141000Minornone



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