Delaware River at Montague, Pike County NJ (MTGN4)
Gage Location: Pike County, Pennsylvania Site Location: Sussex County, New Jersey
Latitude: 41.309Longitude: -74.795Elevation: 369.93 ft. MSLDrainage Area: 3480 Sq. Mi.
Minor Stage: 25 ft. Moderate Stage: 28 ft.Major Stage: 33 ft.
First Flood: 1903-10-10Last Flood: 2006-06-28 Crest: 32.15 ft.Datum change: 1940-02-09Number of Floods: 8

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Date of FloodCrest(ft)Streamflow(cfs)CategoryCode
1903-10-1031.1217000ModerateC1 F1
1936-03-1828.45164500ModerateC1
1942-05-2325.7136500Minornone
1955-08-1935.15250000MajorF2
1996-01-2026.66149000MinorF2
2004-09-1828.37168000ModerateF2
2005-04-0331.69206000ModerateF2
2006-06-2832.15212000ModerateF2



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