Conestoga River at Lancaster, Lancaster County PA (LNCP1)
Gage Location: Lancaster County, Pennsylvania	Site Location: Lancaster County, Pennsylvania
Latitude: 40.05	Longitude: -76.278	Elevation: 245.63 ft. MSL	Drainage Area: 324 Sq. Mi.
Minor Stage: 11 ft.	Moderate Stage: 13 ft.	Major Stage: 15 ft.
First Flood: 1933-08-24	Last Flood: 2013-01-31 Crest: 12.77 ft.	Datum change: 1933-05-01	Number of Floods: 49

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Year Before Datum Change Number of Floods

Year After Datum Change Number of Floods 1933 1 1934 2 1935 0 1936 0 1937 0 1938 0 1939 0 1940 0 1941 0 1942 2 1943 0 1944 0 1945 0 1946 1 1947 0 1948 0 1949 0 1950 0 1951 0 1952 0 1953 0 1954 0 1955 1 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 1 1972 1 1973 1 1974 0 1975 0 1976 1 1977 0 1978 2 1979 3 1980 0 1981 0 1982 1 1983 2 1984 1 1985 1 1986 1 1987 1 1988 3 1989 1 1990 0 1991 0 1992 0 1993 2 1994 0 1995 0 1996 4 1997 0 1998 0 1999 1 2000 1 2001 0 2002 0 2003 2 2004 2 2005 1 2006 2 2007 1 2008 0 2009 0 2010 1 2011 2 2012 1 2013 1

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