Raritan River at Manville, Somerset County NJ (MNVN4)
Gage Location: Somerset County, New JerseySite Location: Somerset County, New Jersey
Latitude: 40.555Longitude: -74.584Elevation: 20.61 ft. MSLDrainage Area: 490 Sq. Mi.
Minor Stage: 14 ft. Moderate Stage: 17 ft.Major Stage: 20 ft.
First Flood: 1903-10-10Last Flood: 2014-05-01 Crest: 20.25 ft.Datum change: 1923-08-15Number of Floods: 125

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Date of FloodCrest(ft)Streamflow(cfs)CategoryCode
1903-10-1018.528600ModerateC1
1905-01-0715.418600MinorC1
1909-02-241415300MinorC1
1910-01-2215.518900MinorC1
1912-03-131620400MinorC1
1914-03-181415300MinorC1
1915-02-0217.525200ModerateC1
1924-04-071517500Minornone
1927-10-1914.115600Minornone
1932-11-1014.5316600Minornone
1932-11-2014.9217300Minornone
1933-08-2416.2221000Minornone
1934-03-0514.5216600Minornone
1936-01-0316.120600Minornone
1936-03-1214.8517000Minornone
1936-12-2014.2315800Minornone
1938-07-2317.7526000Moderatenone
1938-09-2220.4236100Majornone
1939-02-0414.9917500Minornone
1940-03-1518.1527400Moderatenone
1940-04-0914.817000Minornone
1941-02-081517500Minornone
1942-08-0919.733200Moderatenone
1942-08-1416.6722500Minornone
1944-01-0615.0918000Minornone
1945-01-0214.413800Minornone
1946-06-0217.7619900Moderatenone
1948-12-3119.822100Moderatenone
1949-01-0614.312600Minornone
1950-11-2616.1718200Minornone
1950-12-0814.4113400Minornone
1951-03-3114.7413700Minornone
1951-11-0717.1720400Moderatenone
1951-12-2116.717100Minornone
1952-03-1115.0914300Minornone
1953-01-2414.715200Minornone
1953-04-0714.715400Minornone
1954-11-2114.814600Minornone
1955-08-1319.926600Moderatenone
1955-08-1921.8234600Majornone
1955-10-1519.6226200Moderatenone
1957-12-2114.113000Minornone
1958-02-2816.116500Minornone
1960-09-1315.314700Minornone
1962-03-1315.415000Minornone
1964-01-1014.5213600Minornone
1965-02-0814.0512700MinorC7 F1
1966-02-1414.6313200Minornone
1967-03-0716.4616600Minornone
1968-05-2916.5617000Minornone
1969-07-2914.2313100Minornone
1970-04-0318.2223700Moderatenone
1970-12-1414.1313600Minornone
1971-07-1314.113700Minornone
1971-08-2823.836300Majornone
1971-09-1215.0614500Minornone
1972-06-2317.8921800Moderatenone
1972-07-1314.113700Minornone
1972-11-0916.7917300Minornone
1973-02-0316.8417000Minornone
1973-06-301719500Moderatenone
1973-08-0217.4719600Moderatenone
1973-12-2118.4220000Moderatenone
1975-03-2016.1217200Minornone
1976-01-2814.2213400Minornone
1977-02-2514.1313200Minornone
1977-03-2316.5918300Minornone
1978-01-2617.7719400Moderatenone
1979-01-221617000Minornone
1979-01-2518.4823000ModerateC7 F1
1979-02-2616.4518000Minornone
1980-03-2216.6317700Minornone
1981-05-1215.9917900Minornone
1982-01-0516.617000Minornone
1982-02-0414.0812400Minornone
1983-04-1114.8214400Minornone
1983-04-1618.3922800Moderatenone
1983-12-1415.7214900Minornone
1984-04-0517.520500Moderatenone
1984-05-3016.7818800Minornone
1984-07-0719.9527300Moderatenone
1985-11-1714.2415500Minornone
1986-01-2614.6515800Minornone
1986-04-1714.314500Minornone
1986-11-2714.7714400Minornone
1987-04-0416.1717600Minornone
1988-11-2114.3213500Minornone
1989-09-2116.2416200Minornone
1989-10-2114.9914400Minornone
1992-12-1115.1314500Minornone
1993-12-0514.4814200Minornone
1994-01-2915.5514900Minornone
1994-03-1014.9512900Minornone
1996-01-2019.8224300Moderatenone
1996-01-2814.312100Minornone
1996-10-2022.4132000Majornone
1996-12-0215.6715300Minornone
1996-12-1414.813200Minornone
1999-09-1627.177600Majornone
2003-02-2314.1612650Minornone
2003-12-1116.5319100Minornone
2004-07-2414.2113035Minornone
2004-09-2915.9617900Minornone
2005-04-0316.919300Minornone
2005-10-0915.4416900Minornone
2005-10-1216.4419200Minornone
2006-06-2815.7617900Minornone
2006-11-0915.4215500Minornone
2007-04-1622.130400MajorC7
2008-02-1415.116600Minornone
2008-03-0916.7119700Minornone
2008-12-121615800Minornone
2009-12-2714.5314200Minornone
2010-03-1421.5428900Majornone
2010-03-3114.7613900Minornone
2011-03-0714.8915300Minornone
2011-03-1114.9415300Minornone
2011-04-1717.2520700Moderatenone
2011-08-2826.2453000Majornone
2011-09-0715.6117200Minornone
2011-09-0819.1826500Moderatenone
2011-11-2314.2614500Minornone
2011-12-0814.915800Minornone
2013-06-0815.2415200Minornone
2014-05-0120.2524900Majornone



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