Appendix – Delaware River Flood Crests

sample delaware gauging station readoutThe Delaware River, like most others, is measured in depth at United States Geological Service (USGS) gauging stations, generally located at or very near major bridge crossings along its length. Because these depths and the banks that surround them differ, so do flood stages at each station, although some are similar. Another factor affecting actual flood crests at any point along the river is the elevation of surrounding land: where banks are higher, flooding will be less severe.

Delaware River Stream-Flow Gauging Stations

Water years run from October 1-September 30, and are designated by the ending year.  

USGS Station # Station LocationDrainage Area, Sq. Mi.Period of Record
01427410 Near Callicoon, NY1,7081948-1975
01427510At Callicoon, NY1,820 1974-
01428500 Above Lackawanna R. Near Barryville, NY2,0201941-
01434000 At Port Jervis, NY3,0701904-
01438500At Montague, NY3,4801904, 1936-
01440200Near Delaware Water Gap, PA3,8501955, ’64-96, 2002-
01446500At Belvidere, NJ4,5351904, 1923-
01457500 At Riegelsville, NJ6,3281841, 1904, 1907-
01462000At Lambertville, NJ6,6801898-1907
01463500At Trenton, NJ6,7801904, 1913-


Peak Water Levels During Flood of Aug. 19-20, 1955

Bridge Location Date Time Crest ElevationFeet ANL
Lower Trenton-Morrisville 8/20/55 9:00 AM21.99'22.00'
Trenton Calhoun Street 8/20/559:00 AM28.53'18.53'
Yardley-Wilburtha 8/20/55 8:00 AM41.49'25.49'
Washington Crossing8/20/55 7:00 AM53.77'27.77'
New Hope-Lambertville 8/20/55 6:00 AM73.27'24.27'
Centre Bridge-Stockton 8/20/55 5:00 AM84.40'30.40'
Lumberville-Raven Rock 8/20/55 4:00 AM97.25'31.25'
Pt. Pleasant-Byram 8/20/55 3:30 AM105.32'31.32'
Uhlerstown-Frenchtown 8/20/55 2:00 AM127.79'27.00'
Upper Black Eddy-Milford8/20/55 1:00 AM140.25'31.35'
Easton-Phillipsburg 8/19/55 10:30 PM198.90'43.70'
Riverton-Belvidere 8/19/55 9:00 PM 258.48'28.38'

(ANL = Above Normal Low)

SOURCE: 1955 Annual Report – Delaware River Joint Toll Bridge Commission