Schuylkill River at Pottstown, Montgomery County PA (PTNP1)
Gage Location: Montgomery County, PennsylvaniaSite Location: Montgomery County, Pennsylvania
Latitude: 40.242Longitude: -75.652Elevation: 117.86 ft. MSLDrainage Area: 1147 Sq. Mi.
Minor Stage: 12.5 ft. Moderate Stage: 18 ft.Major Stage: 22 ft.
First Flood: 1902-02-28Last Flood: 2014-05-01 Crest: 12.9 ft.Datum change: 2011-08-17Number of Floods: 39

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Date of FloodCrest(ft)Streamflow(cfs)CategoryCode
1973-06-2914.3528100MinorC1 G1
1973-12-2113.5622500MinorC1 G1
1978-01-2615.4132800MinorC1 F2
1979-01-2518.2143000ModerateC1 F2
1979-02-2614.4729500MinorC1 F2
1983-04-1615.6734400MinorC1 F2
1983-12-1415.132400MinorC1 F2
1987-09-0915.3433200MinorC1 F2
1989-05-0614.1829300MinorC1 F2
1993-11-2913.6426000MinorC1 F2
1996-01-2014.8429900MinorC1 F2
1996-10-2014.427200MinorC1 F2
1999-09-1714.4227300MinorC1 F2
2003-06-2013.0423400MinorC1 F2
2004-07-2813.0223327MinorC1 F2
2004-09-1914.5927800MinorC1 F2
2005-04-0313.3524200MinorC1 F2
2005-10-0816.2833100MinorC1 F2
2006-06-2920.8450300ModerateC1 F2
2011-03-1114.1326500MinorC1 F2
2011-09-0918.2742100ModerateC1 F2

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