North Branch Raritan River near Raritan, Somerset County NJ (RRTN4)
Gage Location: Somerset County, New JerseySite Location: Somerset County, New Jersey
Latitude: 40.571Longitude: -74.679Elevation: 50.43 ft. MSLDrainage Area: 190 Sq. Mi.
Minor Stage: 10 ft. Moderate Stage: 12 ft.Major Stage: 15 ft.
First Flood: 1896-02-06Last Flood: 2014-05-01 Crest: 13.29 ft.Datum change: 1936-10-17Number of Floods: 55

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Date of FloodCrest(ft)Streamflow(cfs)CategoryCode
1896-02-06-999919000MissingC1 F1
1927-11-031010500MinorC1
1933-09-151010500MinorC1
1934-09-3010.612200MinorC1
1936-01-0311.3514400MinorC1
1936-03-1210.511900MinorC1
1938-09-2112.1616500Moderatenone
1940-03-1511.6215100Minornone
1942-08-0911.7815500Minornone
1942-08-1411.3314200Minornone
1946-06-0210.1811000Minornone
1948-12-3011.2514000Minornone
1951-11-0710.6310900Minornone
1955-08-1312.717400Moderatenone
1955-08-1913.5920700Moderatenone
1955-10-1512.6817300Moderatenone
1965-02-0810.4910600Minornone
1968-05-2910.3410700Minornone
1970-04-0310.4911200Minornone
1971-08-2815.4728600MajorC5
1972-06-2210.2210400Minornone
1973-08-0210.4410900Minornone
1973-12-2110.4210900Minornone
1975-07-2110.4410900Minornone
1979-01-2511.8715100Minornone
1980-03-2110.6811600Minornone
1981-05-1210.6311400Minornone
1982-01-0410.2410400Minornone
1982-02-0311.6814500Minornone
1983-04-1611.5914200Minornone
1984-04-0510.7911900Minornone
1984-07-0715.327900Majornone
1994-01-2910.1910000Minornone
1996-01-1914.323700ModerateC5
1996-10-1915.4429100MajorC5
1999-09-1618.9829000MajorC5
2003-12-1110.1710230Minornone
2004-02-0711.3213405Minornone
2004-07-2311.9514600Minornone
2004-09-2910.4810000Minornone
2005-04-0310.349690Minornone
2005-10-0910.8811200Minornone
2006-06-2810.7110700Minornone
2007-03-0210.279510Minornone
2007-04-1613.2119500Moderatenone
2008-02-1310.6210500Minornone
2008-03-0811.4212900Minornone
2008-12-1210.5710300Minornone
2010-03-1413.922200Moderatenone
2011-03-0710.018840Minornone
2011-04-1711.1511500Minornone
2011-08-2817.9627800Majornone
2011-09-0710.118240Minornone
2011-09-0812.7217500Moderatenone
2014-05-0113.2912700Moderatenone



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