Juniata River at Mapleton Depot, Huntingdon County PA (MPLP1)
Gage Location: Huntingdon County, PennsylvaniaSite Location: Huntingdon County, Pennsylvania
Latitude: 40.392Longitude: -77.935Elevation: 557.31 ft. MSLDrainage Area: 2030 Sq. Mi.
Minor Stage: 20 ft. Moderate Stage: 24 ft.Major Stage: 26 ft.
First Flood: 1936-03-18Last Flood: 2004-09-18 Crest: 23.76 ft.Datum change: 1937-10-01Number of Floods: 7

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Date of FloodCrest(ft)Streamflow(cfs)CategoryCode
1936-03-1838.2165000MajorC1
1942-12-3120.8248900Minornone
1950-11-2526.476800Majornone
1970-04-0320.7648700Minornone
1972-06-2333.07125000MajorF2
1996-01-2022.4757600MinorF2
2004-09-1823.7664000MinorF2



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: 08:00 PM May 28, 2014