Antietam Creek near Sharpsburg, Washington County MD (SACM2)
Gage Location: Washington County, MarylandSite Location: Washington County, Maryland
Latitude: 39.45Longitude: -77.73Elevation: 311.05 ft. MSLDrainage Area: 281 Sq. Mi.
Minor Stage: 8 ft. Moderate Stage: 10 ft.Major Stage: 12 ft.
First Flood: 1928-07-11Last Flood: 2014-05-16 Crest: 10.21 ft.Datum change: 2011-03-16Number of Floods: 32

Click on table headers to sort
Date of FloodCrest(ft)Streamflow(cfs)CategoryCode
1928-07-1111.96300ModerateC1
1929-05-039.84330MinorC1
1931-07-098.33140MinorC1
1933-08-2410.45690ModerateC1
1934-12-0110.85730ModerateC1
1936-03-188.883930MinorC1
1937-04-2710.676040ModerateC1
1944-01-048.533910MinorC1
1949-07-1811.236470ModerateC1
1950-11-269.224720MinorC1
1952-05-2510.325480ModerateC1
1952-11-229.174680MinorC1
1954-10-158.754180MinorC1
1956-07-2016.7312600MajorC1
1972-06-2314.39880MajorC1
1975-09-2614.7110100MajorC1
1976-10-0911.886920ModerateC1
1979-01-2510.395470ModerateC1
1984-02-1510.315400ModerateC1
1985-02-1311.326390ModerateC1
1992-04-228.463730MinorC1
1996-01-1913.718960MajorC1
1998-03-219.394870MinorC1
2003-12-129.314800MinorC1
2005-03-289.364840MinorC1
2006-06-2810.856240ModerateC1
2010-03-149.084340MinorC1
2011-04-169.685130Minornone
2011-04-178.634200Minornone
2011-04-288.394000Minornone
2012-10-319.895330Minornone
2014-05-1610.215430Moderatenone



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