Susquehanna River at Danville, Montour County PA (DANP1)
Gage Location: Montour County, Pennsylvania	Site Location: Montour County, Pennsylvania
Latitude: 40.958	Longitude: -76.619	Elevation: 431.29 ft. MSL	Drainage Area: 11220 Sq. Mi.
Minor Stage: 20 ft.	Moderate Stage: 23 ft.	Major Stage: 30 ft.
First Flood: 1865-03-18	Last Flood: 2011-09-09 Crest: 31.55 ft.	Datum change: 1939-06-29	Number of Floods: 43

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Date of Flood Crest(ft) Streamflow(cfs) Category Code 1865-03-18 28 -9999 Moderate *** 1901-12-16 22.8 188000 Minor *** 1902-03-03 26.9 243000 Moderate *** 1904-01-25 26.2 -9999 Moderate *** 1904-02-10 24.6 -9999 Moderate *** 1904-03-09 30.71 -9999 Major *** NWS 1910-03-03 21 165000 Minor *** 1913-03-28 23.11 192000 Moderate *** 1914-03-29 22.6 186000 Minor *** 1916-04-02 21.8 175000 Minor *** 1920-03-14 20.9 170000 Minor *** 1925-02-13 20.3 162000 Minor *** 1929-04-23 20.35 163000 Minor *** 1935-07-11 20 153000 Minor *** 1936-03-20 27.42 250000 Moderate *** 1940-04-02 25.25 222000 Moderate none 1943-01-01 24 204000 Moderate none 1946-05-29 25.98 234000 Moderate (7) 1948-03-24 22.63 184000 Minor none 1950-03-30 21.81 168000 Minor none 1956-03-09 22.47 175000 Minor none 1958-04-08 21.87 169000 Minor none 1960-04-02 23.92 198000 Moderate none 1961-02-28 21.72 167000 Minor none 1964-03-11 25.13 261000 Moderate none 1972-06-24 32.32 363000 Major (A) (7) 1975-09-28 27.52 257000 Moderate none 1979-03-07 23.93 188000 Moderate (A) (1) 1983-04-17 20.53 149000 Minor (A) (1) 1984-04-07 24.14 194000 Moderate (A) (1) 1986-03-16 22.68 173000 Minor (A) (1) 1993-04-03 23.97 187000 Moderate (A) 1994-03-26 20.15 139000 Minor none 1996-01-21 25.96 209000 Moderate (A) 1998-01-10 20.43 143000 Minor (A) 2004-09-19 26.22 220000 Moderate (1) 2005-01-15 20.56 149000 Minor (1) 2005-03-30 20.86 154000 Minor (1) 2005-04-04 24.28 202000 Moderate (1) 2006-06-29 28.19 260000 Moderate none 2011-03-12 22.57 170000 Minor none 2011-04-29 22.41 169000 Minor none 2011-09-09 31.55 311000 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