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

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Year Before Datum Change Number of Floods 1841 1 1842 0 1843 0 1844 0 1845 0 1846 0 1847 0 1848 0 1849 0 1850 0 1851 0 1852 0 1853 0 1854 0 1855 0 1856 0 1857 0 1858 0 1859 0 1860 0 1861 0 1862 0 1863 0 1864 0 1865 0 1866 0 1867 0 1868 0 1869 0 1870 0 1871 0 1872 0 1873 0 1874 0 1875 0 1876 0 1877 0 1878 0 1879 0 1880 0 1881 0 1882 0 1883 0 1884 0 1885 0 1886 0 1887 0 1888 0 1889 0 1890 0 1891 0 1892 0 1893 0 1894 0 1895 0 1896 0 1897 0 1898 0 1899 0 1900 0 1901 0 1902 0 1903 1 1904 0 1905 0 1906 0 1907 1 1908 0 1909 0 1910 0 1911 0 1912 0 1913 1 1914 1 1915 0 1916 0 1917 0 1918 0 1919 0 1920 1 1921 0 1922 0 1923 0

Year After Datum Change Number of Floods 1924 2 1925 1 1926 1 1927 0 1928 0 1929 0 1930 0 1931 0 1932 0 1933 1 1934 0 1935 1 1936 2 1937 0 1938 1 1939 0 1940 1 1941 0 1942 2 1943 0 1944 0 1945 0 1946 0 1947 0 1948 2 1949 0 1950 1 1951 1 1952 1 1953 0 1954 0 1955 2 1956 0 1957 0 1958 0 1959 0 1960 1 1961 0 1962 0 1963 0 1964 0 1965 0 1966 0 1967 0 1968 0 1969 0 1970 0 1971 0 1972 0 1973 2 1974 0 1975 0 1976 0 1977 1 1978 0 1979 0 1980 0 1981 0 1982 0 1983 1 1984 1 1985 0 1986 1 1987 0 1988 0 1989 0 1990 0 1991 0 1992 0 1993 0 1994 0 1995 0 1996 1 1997 0 1998 0 1999 0 2000 0 2001 0 2002 0 2003 0 2004 1 2005 1 2006 1 2007 0 2008 0 2009 0 2010 0 2011 4 2012 0 2013 0

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: 07:53 AM Feb 11, 2013