Delaware River at Lambertville NY (New Hope PA), Hunterdon County PA (NHPP1)
Gage Location: Hunterdon - Lambertville County, New Jersey Site Location: Bucks County, Pennsylvania
Latitude: 40.365Longitude: -74.949Elevation: 49 ft. MSLDrainage Area: 6680 Sq. Mi.
Minor Stage: 13 ft. Moderate Stage: 15 ft.Major Stage: 16 ft.
First Flood: 1841-01-08Last Flood: 2011-09-08 Crest: 16.14 ft.Datum change: 2004-10-01Number of Floods: 14

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Date of FloodCrest(ft)Streamflow(cfs)CategoryCode
1841-01-0817.9-9999MajorC1
1846-03-1515.5-9999ModerateC1
1902-03-0218.3214000MajorC1
1903-10-1122.3274000MajorC1
1936-03-1917.89-9999MajorC1
1942-05-2414.12-9999MinorC1
1955-08-2024.16-9999MajorC1
1984-05-3013.21-9999MinorC1
1996-01-2015.34-9999ModerateC1
2004-09-1916.5-9999MajorC1 C3
2005-04-0419.6-9999Majornone
2006-06-2919.08-9999Majornone
2011-03-1213.07-9999Minornone
2011-09-0816.14-9999Majornone



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