West Branch Susquehanna River at Montgomery, Lycoming County PA (MTGP1)
Gage Location: Lycoming County, Pennsylvania	Site Location: Lycoming County, Pennsylvania
Latitude: 41.1694	Longitude: -76.8747	Elevation: 983.96 ft. MSL	Drainage Area: 298 Sq. Mi.
Minor Stage: 20 ft.	Moderate Stage: 24 ft.	Major Stage: 28 ft.
First Flood: 1865-03-17	Last Flood: 2011-09-08 Crest: 26.7 ft.	Datum change: 1865-01-01	Number of Floods: 43

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Year Before Datum Change Number of Floods

Year After Datum Change Number of Floods 1865 1 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 1 1890 0 1891 1 1892 0 1893 0 1894 1 1895 0 1896 0 1897 0 1898 1 1899 0 1900 0 1901 1 1902 0 1903 0 1904 0 1905 0 1906 0 1907 0 1908 0 1909 1 1910 0 1911 0 1912 0 1913 1 1914 0 1915 0 1916 2 1917 0 1918 1 1919 1 1920 1 1921 0 1922 0 1923 1 1924 0 1925 0 1926 0 1927 0 1928 0 1929 0 1930 0 1931 0 1932 0 1933 0 1934 0 1935 0 1936 2 1937 0 1938 0 1939 0 1940 1 1941 0 1942 0 1943 0 1944 0 1945 0 1946 1 1947 0 1948 1 1949 0 1950 1 1951 0 1952 0 1953 0 1954 1 1955 0 1956 1 1957 0 1958 0 1959 1 1960 1 1961 1 1962 0 1963 0 1964 1 1965 0 1966 0 1967 0 1968 0 1969 0 1970 0 1971 0 1972 1 1973 0 1974 0 1975 2 1976 0 1977 0 1978 0 1979 1 1980 0 1981 1 1982 0 1983 0 1984 2 1985 0 1986 0 1987 0 1988 0 1989 0 1990 0 1991 0 1992 0 1993 1 1994 1 1995 0 1996 1 1997 0 1998 0 1999 0 2000 0 2001 0 2002 0 2003 0 2004 1 2005 1 2006 0 2007 0 2008 0 2009 0 2010 2 2011 3 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: 08:09 AM Feb 08, 2013