Swatara Creek at Middletown, Dauphin County PA (Old Site - MIDP1)
Gage Location: Dauphin County, Pennsylvania Site Location: Dauphin County, Pennsylvania
Latitude: 40.2Longitude: -76.717Elevation: 284 ft. MSL Drainage Area: 569 Sq. Mi.
Minor Stage: 11 ft. Moderate Stage: 14 ft.Major Stage: 16 ft.
First Flood: 1972-06-23Last Flood: 2011-09-09 Crest: 23.23 ft.Datum change: 1975-09-01Number of Floods: 25

Click on table headers to sort
Year
Before Datum Change
Number of Floods
19721
19730
19740
Year
After Datum Change
Number of Floods
19751
19761
19770
19780
19790
19800
19810
19820
19831
19840
19850
19861
19870
19881
19891
19900
19910
19920
19932
19941
19951
19962
19970
19980
19990
20000
20010
20020
20030
20042
20051
20061
20071
20082
20090
20101
20114
20120
20130




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: 08:09 AM Feb 08, 2013