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
2014-05-0120.2525000Majornone



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