Susquehanna River at Towanda, Bradford County PA (TOWP1)
Gage Location: Bradford County, Pennsylvania	Site Location: Bradford County, Pennsylvania
Latitude: 41.765	Longitude: -76.441	Elevation: 694.38 ft. MSL	Drainage Area: 7797 Sq. Mi.
Minor Stage: 16 ft.	Moderate Stage: 18 ft.	Major Stage: 25.1 ft.
First Flood: 1865-03-17	Last Flood: 2011-09-08 Crest: 30.52 ft.	Datum change: 1938-10-18	Number of Floods: 92

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Date of Flood Crest(ft) Streamflow(cfs) Category Code 1865-03-17 25 188000 Moderate *** 1893-05-04 16 109000 Minor *** 1902-03-02 24.5 184000 Moderate *** 1904-03-27 17.8 133000 Minor *** 1910-03-02 18.4 142000 Moderate *** 1912-03-30 16 109000 Minor *** 1913-03-28 20.7 146000 Moderate *** 1914-03-29 20.4 173000 Moderate *** 1915-02-25 17.5 129000 Minor *** 1915-07-09 17.5 129000 Minor *** 1916-03-31 18.3 140000 Moderate *** 1918-03-15 17.2 124000 Minor *** 1920-03-13 17.2 124000 Minor *** 1924-04-07 17.8 133000 Minor *** 1924-10-01 16.8 119000 Minor *** 1925-02-12 18.7 146000 Moderate *** 1926-11-17 16.6 116000 Minor *** 1927-10-20 17.3 126000 Minor *** 1929-03-17 16.8 119000 Minor *** 1929-04-22 19.9 165000 Moderate *** 1935-01-10 16.5 99500 Minor *** 1935-07-09 21.1 144000 Moderate *** 1936-03-13 22.34 157000 Moderate *** 1936-03-19 25.03 188000 Moderate *** 1939-02-21 19.13 128000 Moderate none 1940-04-01 23.84 176000 Moderate none 1940-04-05 19.75 134000 Moderate none 1940-04-09 18.13 118000 Moderate none 1941-04-06 18.47 122000 Moderate none 1942-03-10 17.21 109000 Minor none 1942-12-31 23.3 171000 Moderate none 1945-03-04 16.15 99400 Minor none 1946-05-29 25.08 191000 Moderate none 1947-04-06 19.6 132000 Moderate none 1948-03-17 16.71 104000 Minor none 1948-03-23 23.04 168000 Moderate none 1950-03-29 21.18 148000 Moderate none 1950-04-05 16.72 102000 Minor none 1950-11-27 17.96 115000 Minor none 1951-03-31 18.91 124000 Moderate none 1952-03-12 17.59 111000 Minor none 1955-10-16 18.96 124000 Moderate none 1956-03-08 22.28 160000 Moderate none 1956-04-05 18.27 118000 Moderate none 1958-04-08 20.86 144000 Moderate none 1959-01-23 19.52 130000 Moderate none 1960-04-01 22.76 165000 Moderate none 1960-04-05 17.96 115000 Minor none 1961-02-27 21.08 147000 Moderate none 1961-04-26 19.92 134000 Moderate none 1962-04-01 17.13 106000 Minor none 1963-03-28 17.77 113000 Minor none 1964-03-06 23.63 174000 Moderate none 1964-03-11 20.77 143000 Moderate none 1970-04-03 16.03 95400 Minor none 1972-03-03 17.78 112000 Minor none 1972-06-24 33.43 320000 Major none 1975-02-25 20.2 137000 Moderate none 1975-09-27 27.47 221000 Major none 1976-02-18 16.61 101000 Minor none 1977-03-14 16.04 95500 Minor none 1977-09-26 16.42 98900 Minor none 1978-01-27 16.29 97700 Minor none 1979-01-03 16.22 97100 Minor none 1979-03-06 24.04 179000 Moderate none 1983-12-14 22.4 154000 Moderate (6) 1984-02-15 21.69 146000 Moderate (6) 1984-04-06 21.84 148000 Moderate (6) 1986-03-16 20.23 131000 Moderate (6) 1989-05-12 16.03 91400 Minor (6) 1990-10-24 18.29 117000 Moderate (6) 1993-04-02 21.99 152000 Moderate (6) 1993-04-11 21.31 145000 Moderate (6) 1993-04-17 16.43 100000 Minor (6) 1994-03-25 17.6 111000 Minor (6) 1996-01-20 24.84 180000 Moderate (6) 1996-05-12 16.58 101000 Minor (6) 1996-11-09 18.11 116000 Moderate (6) 1996-12-02 17.63 111000 Minor (6) 1998-01-09 17.88 113000 Minor (6) 2000-02-28 17.62 111000 Minor (6) 2004-09-18 22.26 154000 Moderate (6) 2005-01-15 17.37 110000 Minor (6) 2005-04-04 23.05 162000 Moderate (6) 2005-11-30 16.03 98000 Minor (6) 2006-06-29 20.83 141000 Moderate (6) 2007-03-16 17.46 110000 Minor (6) 2008-02-07 16.58 103000 Minor (6) 2010-01-26 17.37 110000 Minor none 2011-03-12 18.96 124000 Moderate none 2011-04-28 19.41 128000 Moderate none 2011-09-08 30.52 250000 Major none

MARFC Codes
Code Description
(!!!) Datum changed during this year.
(1) Backwater Effect.
(2) 15.77 ft also occurred on 11/25/1950 but only counted as one flood.
(3) Estimated from currrent USGS rating table.
(4) Estimated height from the USGS.
(5) Gage height at a different site and/or datum
(6) Discharge affected by Regulation or Diversion
(7) Due to changes, prior floods were based on present flood stage. Therefore, flood data could possibly be incomplete.
(8) Gage is a staff gage and not the offical USGS gage. Therefore, some floods may be missing from our study.
(9) Discharge effected by snow-melt, ice jam or debris jam break up
(A) Discharge affected to unknown degree by regulation or diversion.
(B) Month or day of occurrence is unknown or not exact.
(C) All or part of the record affected by urbanization, mining, agricultural changes, channelization, or other factors.
(D) Crest height adjusted to current datum.
(E) Estimated discharge.
(F) Only annual maximum peak available for this year.
(O) This flood occurred at a previous flood stage that is lower than the current flood stage. This is only a historical flood.
** Crest information looks reasonable despite potential problems. This data was used in our study.
*** Crest information looks unreliable and incomplete and was not used in our flood frequency study.
**** Gauge was discontinued in 2004. 2004 and later was not used in our study.
none No code

Updated: 08:58 AM Jun 28, 2012