Frankstown Branch Juniata River at Williamsburg, Blair County PA (WIBP1)
Gage Location: Blair County, PennsylvaniaSite Location: Blair County, Pennsylvania
Latitude: 40.463Longitude: -78.2Elevation: 831.78 ft. MSLDrainage Area: 291 Sq. Mi.
Minor Stage: 12 ft. Moderate Stage: 13 ft.Major Stage: 15 ft.
First Flood: 1889-06-01Last Flood: 2011-09-10 Crest: 12.16 ft.Datum change: 1928-08-14Number of Floods: 44

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Date of FloodCrest(ft)Streamflow(cfs)CategoryCode
1889-06-0119.135500MajorC1
1924-05-1212.811000MinorC1
1925-02-1212.410200MinorC1
1929-10-2313.913000Moderatenone
1936-03-1818.5830000Majornone
1937-04-2613.913400Moderatenone
1937-04-2812.4311400Minornone
1940-03-3112.9412900Minornone
1952-03-1112.829250Minornone
1954-03-0113.9811200Moderatenone
1954-10-1612.278000Minornone
1956-08-0813.2310500Moderatenone
1960-05-0913.369920Moderatenone
1961-02-2614.1211400Moderatenone
1963-03-0512.255130MinorC5 C7
1964-03-1012.047540Minornone
1966-02-1413.39800Moderatenone
1967-03-0612.929050Minornone
1970-04-0213.548550Moderatenone
1970-11-1314.510000Moderatenone
1972-06-2318.3916400Majornone
1977-04-0312.116770Minornone
1979-03-0513.057900Moderatenone
1984-02-1515.3811300Majornone
1986-03-1512.096960Minornone
1987-04-0513.769040Moderatenone
1993-04-1614.089470Moderatenone
1993-11-2816.0312300Majornone
1994-03-2513.598820Moderatenone
1996-01-1919.3517800Majornone
1996-03-2012.056920Minornone
1996-07-2013.288420Moderatenone
1996-09-0712.827840Minornone
1997-11-0817.915200Majornone
2003-01-0213.498690Moderatenone
2003-11-2012.857900Minornone
2004-09-0916.9113600Majornone
2004-09-1819.4618000Majornone
2010-01-2512.257160Minornone
2010-03-1413.568780Moderatenone
2010-12-0115.2711600Majornone
2011-03-1113.779470Moderatenone
2011-09-0714.039810Moderatenone
2011-09-1012.167360Minornone



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