Swatara Creek near Hershey, Dauphin County PA (HERP1)
Gage Location: Dauphin County, PennsylvaniaSite Location: Dauphin County, Pennsylvania
Latitude: 40.298Longitude: -76.668Elevation: 325.94 ft. MSLDrainage Area: 483 Sq. Mi.
Minor Stage: 7 ft. Moderate Stage: 10 ft.Major Stage: 14 ft.
First Flood: 1975-09-27Last Flood: 2013-10-11 Crest: 7.54 ft.Datum change: 1975-10-01Number of Floods: 46

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Date of FloodCrest(ft)Streamflow(cfs)CategoryCode
1975-09-2715.3629400Majornone
1976-01-279.4414000Minornone
1976-10-109.1813400Minornone
1977-03-057.159170Minornone
1977-12-217.59870Minornone
1978-01-279.1913400Minornone
1978-03-278.2111340Minornone
1979-01-227.129110Minornone
1979-01-2514.4326600Majornone
1979-02-268.9412900Minornone
1983-04-169.4513700Minornone
1983-12-147.699970Minornone
1984-05-307.198960Minornone
1986-03-157.39180Minornone
1987-09-147.8510300Minornone
1988-05-208.0210600Minornone
1989-05-077.359280Minornone
1989-05-178.3311300Minornone
1993-11-2910.3316500Moderatenone
1993-12-067.6210200Minornone
1996-01-2014.326000Majornone
1996-01-289.1113500Minornone
1996-10-208.0811200Minornone
1996-12-147.369640Minornone
2000-03-22811000Minornone
2000-12-187.329560Minornone
2003-12-127.519970Minornone
2004-09-1914.2726000Majornone
2004-09-297.018880Minornone
2005-01-157.018880Minornone
2005-03-297.519970Minornone
2005-04-038.0111100Minornone
2006-06-2916.1231700Majornone
2006-10-297.058970Minornone
2006-11-177.199280Minornone
2007-03-038.3711500Minornone
2008-03-0611.0617400Moderatenone
2008-12-127.18800Minornone
2010-10-017.639890minornone
2011-03-077.449490Minornone
2011-03-1210.9717200Moderatenone
2011-04-178.3411400Minornone
2011-09-0827.2296900Majornone
2011-09-287.49390Minornone
2011-11-237.168920Minornone
2013-10-117.549700Minornone



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