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 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