Tioga River near Mansfield, Tioga County PA (MFDP1)
Gage Location: Tioga County, Pennsylvania	Site Location: Tioga County, Pennsylvania
Latitude: 41.7969	Longitude: -77.0805	Elevation: 1121.28 ft. MSL	Drainage Area: 153 Sq. Mi.
Minor Stage: 12 ft.	Moderate Stage: 13 ft.	Major Stage: 14 ft.
First Flood: 1972-06-22	Last Flood: 2011-09-08 Crest: 13.08 ft.	Datum change: 1976-07-18	Number of Floods: 27

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Year Before Datum Change	Number of Floods
1972	1
1973	0
1974	0
1975	1

Year After Datum Change	Number of Floods
1976	0
1977	1
1978	1
1979	1
1980	1
1981	1
1982	1
1983	1
1984	2
1985	0
1986	1
1987	1
1988	1
1989	1
1990	1
1991	0
1992	1
1993	1
1994	1
1995	1
1996	2
1997	0
1998	1
1999	1
2000	0
2001	0
2002	0
2003	0
2004	1
2005	1
2006	0
2007	0
2008	0
2009	0
2010	0
2011	1
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: 11:54 AM Feb 17, 2013