Conestoga River at Lancaster, Lancaster County PA (LNCP1)
Gage Location: Lancaster County, PennsylvaniaSite Location: Lancaster County, Pennsylvania
Latitude: 40.05Longitude: -76.278Elevation: 245.63 ft. MSLDrainage Area: 324 Sq. Mi.
Minor Stage: 11 ft. Moderate Stage: 13 ft.Major Stage: 15 ft.
First Flood: 1933-08-24Last Flood: 2014-05-01 Crest: 11.63 ft.Datum change: 1933-05-01Number of Floods: 51

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Date of FloodCrest(ft)Streamflow(cfs)CategoryCode
1933-08-2417.5222800Majornone
1934-07-0812.812600Minornone
1934-09-3014.0415000Moderatenone
1942-05-2315.1217300Majornone
1942-08-1811.610300Minornone
1946-06-0212.6912400Minornone
1955-08-1912.1111200Minornone
1960-09-1311.7710600Minornone
1971-02-1412.0811200Minornone
1972-06-2327.950300Majornone
1973-06-2911.388830Minornone
1976-01-2712.8412600Minornone
1978-01-2518.1425300Majornone
1978-03-2711.749060Minornone
1979-01-2112.259830Minornone
1979-01-2513.9113000Moderatenone
1979-02-2613.8712900Moderatenone
1982-06-1714.213600Moderatenone
1983-04-1612.4810200Minornone
1983-12-1311.929330Minornone
1984-07-0712.8510800Minornone
1985-02-1212.7110600MinorC3 F1
1986-07-271311000ModerateC3 F1
1987-09-0916.720500Majornone
1988-05-1912.119600MinorC3 F1
1988-07-22129500Minornone
1988-07-2411.89200Minornone
1989-05-0615.316300Majornone
1993-11-2811.959060Minornone
1993-12-0513.9512600Moderatenone
1996-01-2012.269560Minornone
1996-10-2013.2211200Moderatenone
1996-11-0911.78700Minornone
1996-12-1411.99000Minornone
1999-09-1716.3917600Majornone
2000-03-2214.1412900Moderatenone
2003-06-2111.668600Minornone
2003-09-2312.7410400Minornone
2004-02-0711.097815Minornone
2004-07-2814.4313500Moderatenone
2005-10-0917.820800Majornone
2006-06-2814.714000Moderatenone
2006-11-1711.057760Minornone
2007-03-0212.9510700Minornone
2010-10-0111.358180minorC7
2011-08-2812.159370Minornone
2011-09-0821.330200Majornone
2012-10-3114.2713800Moderatenone
2013-01-3112.7711000Minornone
2013-10-1111.28350Minornone
2014-05-0111.639030Minornone



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: 08:00 PM May 28, 2014