Sherman Creek at Shermans Dale, Perry County PA (SMDP1)
Gage Location: Perry County, Pennsylvania	Site Location: Perry County, Pennsylvania
Latitude: 40.323	Longitude: -77.169	Elevation: 422.63 ft. MSL	Drainage Area: 200 Sq. Mi.
Minor Stage: 9 ft.	Moderate Stage: 11 ft.	Major Stage: 16 ft.
First Flood: 1843-09-01	Last Flood: 2012-10-31 Crest: 9.64 ft.	Datum change: 1930-01-29	Number of Floods: 76

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MINOR FLOODS Date of Flood Crest(ft) 1934-09-17 9.06 1936-03-12 10.28 1937-04-27 9.87 1937-11-13 9.43 1942-12-30 9.02 1946-05-27 10.22 1950-12-04 9.48 1953-03-24 9.46 1953-05-26 9.71 1955-08-13 9.07 1955-10-14 10.9 1962-03-06 9.01 1966-02-13 10.15 1968-05-29 10.13 1970-04-03 10.14 1970-07-10 9.88 1972-03-03 9.26 1975-10-18 10.66 1978-01-10 9.45 1978-05-15 10.14 1978-08-04 9.78 1979-02-26 9.21 1980-03-21 9.93 1980-04-09 9.44 1981-02-23 10.96 1983-12-13 9.82 1986-03-15 9.45 1989-07-13 9.45 1990-10-13 10.05 1990-10-23 9.24 1993-04-01 10.06 1995-01-20 9.82 1997-09-11 10.52 1997-11-08 10.06 1998-01-08 9.75 2005-03-29 9.68 2005-04-02 9.36 2005-11-30 9.37 2010-01-25 10.62 2010-12-01 10.22 2011-09-10 10.21 2011-11-23 9.54 2012-10-31 9.64

MODERATE FLOODS Date of Flood Crest(ft) 1933-08-24 14.05 1934-12-01 12.28 1942-05-22 11.14 1950-11-25 11.48 1952-03-11 13.59 1952-11-22 11.51 1956-11-02 12.75 1975-09-26 11.23 1976-10-09 14.15 1979-01-24 12.02 1979-02-25 11 1989-06-21 12.25 1989-07-16 12.57 1993-11-28 11.42 1996-01-19 11.7 1996-01-27 11.7 1996-09-07 14.56 1996-09-13 11.42 2003-12-11 11.37 2006-06-28 11.83 2008-03-05 11.57 2009-05-29 13.62 2011-03-11 11.82 2011-04-17 11.67 2011-09-07 11.04

MAJOR FLOODS Date of Flood Crest(ft) 1927-07-22 20.34 1972-06-23 18.09 1984-02-14 16.1 2004-09-18 16.31

MISSING Date of Flood Crest(ft) 1843-09-01 -9999 1846-03-16 -9999 1860-05-11 -9999 1867-02-15 -9999

Categorical Floods by Month Month Minor After Datum Minor Total Moderate After Datum Moderate Total Major After Datum Major Total Missing After Datum Missing Total January 4 4 3 3 0 0 0 0 February 3 3 1 1 1 1 0 1 March 7 7 3 3 0 0 0 1 April 5 5 1 1 0 0 0 0 May 4 4 2 2 0 0 0 1 June 0 0 2 2 1 1 0 0 July 2 2 1 1 0 1 0 0 August 2 2 1 1 0 0 0 0 September 3 3 4 4 1 1 0 1 October 5 5 1 1 0 0 0 0 November 4 4 4 4 0 0 0 0 December 4 4 2 2 0 0 0 0

Categorical Floods by Season Season Minor Moderate Major Missing Fall 12 9 1 1 Winter 11 6 1 1 Spring 16 6 0 2 Summer 4 4 2 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: 08:09 AM Feb 08, 2013