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: 2011-09-08 Crest: 12.72 ft.Datum change: 1936-10-17Number of Floods: 54

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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



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: 07:20 AM Nov 12, 2013