Delaware River at Riegelsville, Warren County NJ (RGLN4)
Gage Location: Warren County, New JerseySite Location: Bucks County, Pennsylvania
Latitude: 40.595Longitude: -75.19Elevation: 125.12 ft. MSLDrainage Area: 6328 Sq. Mi.
Minor Stage: 22 ft. Moderate Stage: 26 ft.Major Stage: 30 ft.
First Flood: 1841-01-08Last Flood: 2011-09-09 Crest: 28.06 ft.Datum change: 1924-02-28Number of Floods: 40

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Date of FloodCrest(ft)Streamflow(cfs)CategoryCode
1841-01-08-9999250000MissingC1 F1
1903-10-1035.9275000MajorC1
1907-12-1122.5120000MinorC1
1913-03-2825144000MinorC1
1914-03-2923.4130000MinorC1
1920-03-1422.1120000MinorC1
1924-04-0823.1122000Minornone
1924-10-0124.2132000Minornone
1925-02-1223.82128000Minornone
1926-11-1722.6118000Minornone
1933-08-2525141000Minornone
1935-07-1023.2125000Minornone
1936-03-1229.8185000Moderatenone
1936-03-1932.45237000Majornone
1938-09-2323123000Minornone
1940-04-0126.47154000Moderatenone
1942-05-2427.5164000Moderatenone
1942-12-3122.88122800Minornone
1948-03-2323.28121300Minornone
1948-12-3124.5131900Minornone
1950-11-2722.5114700Minornone
1951-04-0124.03127800Minornone
1952-12-1225.4140000Minornone
1955-08-1938.85340000MajorF2
1955-10-1623.8133000MinorF2
1960-04-0522.6121000MinorF2
1973-06-3024.36139000MinorC2 F2
1973-12-2222.55118000MinorC2 F2
1977-03-1422.16117000MinorC2 F2
1983-04-1724.17137000MinorC2 F2
1984-05-3024.46140000MinorC2 F2
1986-03-1625.16147000MinorC2 F2
1996-01-2028.72187000ModerateC2 F2
2004-09-1930.95216000MajorC2 F2
2005-04-0434.07262000MajorC2 F2
2006-06-2933.62254000MajorC2 F2
2011-03-0722.35-9999Minornone
2011-03-1225.2-9999Minornone
2011-08-2924.56-9999Minornone
2011-09-0928.06175000Moderatenone



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