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 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