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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Date of Flood Crest(ft) Streamflow(cfs) Category Code 1972-06-22 17.98 24200 Major C1 C7 1975-09-25 20.13 18000 Major C1 C8 F1 1977-02-24 14.9 5840 Major none 1978-05-14 16.17 8940 Major none 1979-01-24 14.15 5240 Major none 1980-03-21 13.59 6570 Moderate none 1981-02-23 12.87 4810 Minor none 1982-06-06 13.16 5460 Moderate none 1983-04-24 12.2 3250 Minor none 1984-02-14 14.68 9490 Major none 1984-11-29 12.19 3150 Minor none 1986-03-15 13.92 7430 Moderate none 1987-04-04 13.68 6800 Moderate none 1988-05-19 14.62 9300 Major none 1989-06-17 12.91 4480 Minor none 1990-10-23 15.44 11500 Major none 1992-08-09 14.21 8520 Major none 1993-04-16 16.12 11500 Major none 1994-08-18 18.57 33300 Major none 1995-01-20 12.7 31002 Minor F1 C3 1996-01-19 18.87 38900 Major none 1996-12-02 16.5 13200 Major none 1998-01-08 14.45 4700 Major none 1999-01-24 14.71 5260 Major none 2004-09-18 14.21 20900 Major none 2005-04-02 12.3 13000 Minor none 2011-09-08 13.08 15800 Moderate none

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: 01:02 PM Jun 12, 2013