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
Date of FloodCrest(ft)Streamflow(cfs)CategoryCode
1972-06-2328.45-9999Major***
1975-09-2719.47-9999Majornone
1976-01-2713.47-9999Minornone
1983-04-1713.5-9999Minornone
1986-03-1612.14-9999Minornone
1988-05-2212.2-9999Minornone
1989-05-1712-9999Minornone
1993-11-2914-9999Moderatenone
1993-12-0611.5-9999Minornone
1994-03-2811-9999Minornone
1995-01-2011-9999Minornone
1996-01-2114-9999Moderatenone
1996-01-2813-9999Minornone
2004-09-1919.5-9999Majornone
2004-09-2911-9999Minornone
2005-01-1511.3-9999Minornone
2006-06-2820.6-9999Majornone
2007-03-0311.9-9999Minornone
2008-03-0615-9999Moderatenone
2008-12-1311-9999Minornone
2010-10-0111.2-9999minornone
2011-03-0811.2-9999Minornone
2011-03-1315.1-9999Moderatenone
2011-04-1810.88920Minornone
2011-09-0923.23-9999Majornone



MARFC Codes
Code Description
(!!!) Datum changed during this year.
(1) Backwater Effect.
(2) 15.77 ft also occurred on 11/25/1950 but only counted as one flood.
(3) Estimated from currrent USGS rating table.
(4) Estimated height from the USGS.
(5) Gage height at a different site and/or datum
(6) Discharge affected by Regulation or Diversion
(7) Due to changes, prior floods were based on present flood stage. Therefore, flood data could possibly be incomplete.
(8) Gage is a staff gage and not the offical USGS gage. Therefore, some floods may be missing from our study.
(9) Discharge effected by snow-melt, ice jam or debris jam break up
(A) Discharge affected to unknown degree by regulation or diversion.
(B) Month or day of occurrence is unknown or not exact.
(C) All or part of the record affected by urbanization, mining, agricultural changes, channelization, or other factors.
(D) Crest height adjusted to current datum.
(E) Estimated discharge.
(F) Only annual maximum peak available for this year.
(O) This flood occurred at a previous flood stage that is lower than the current flood stage. This is only a historical flood.
** Crest information looks reasonable despite potential problems. This data was used in our study.
*** Crest information looks unreliable and incomplete and was not used in our flood frequency study.
**** Gauge was discontinued in 2004. 2004 and later was not used in our study.
none No code

Updated: 08:58 AM Jun 28, 2012