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Delaware River at New Hope-Lambertville Bridge, PA (NHPP1)


Data Type




Inundation Levels
NAVD88 Stage

77.7* 29.6*
76.3* 28.2*
74.7* 26.6*
73.3* 25.2*
Record Crest: 24.16 ft
72.1 24.0
70.8 22.7
69.5 21.4
68.2 20.1
66.7 18.6
65.3 17.2

Major Flooding Begins

64.0 15.9
63.1 15.0

Moderate Flooding Begins

62.3 14.2
61.4 13.3

Minor Flooding Begins

60.5 12.4

Near Flooding Begins

59.1 11.0
58.1 10.0
57.0 8.9
* = Extended rating
Weather Forecast Office Philadelphia/Mount Holly, NJ Middle Atlantic River Forecast Center

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Current Stage:
1.0 ft at 07/23/2014 02:45:00 UTC
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Inundation Legend Inundation Legend
USGS Gauge Location Gauge Location

Latitude/Longitude Disclaimer: The gauge location shown in the above map is the approximate location based on the latitude/longitude coordinates provided to the NWS by the gauge owner.

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Map Overlays

Flood Categories (in feet)
Major Flood Stage:16
Moderate Flood Stage:15
Flood Stage:13
Action Stage:12

Historical Crests
(1) 24.16 ft on 08/20/1955
(2) 21.80 ft on 10/11/1903
(3) 19.60 ft on 04/04/2005
(4) 19.08 ft on 06/29/2006 (P)
(5) 17.90 ft on 01/08/1841
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(P): Preliminary values subject to further review.

Low Water Records

Graphical representation of flood inundation for NWS flood categories are based on steady state hydraulic modeling of water surface elevations for incremented discharges. Map shows approximate inundation areas for given water surface elevations and should not be used for navigation or permitting or other legal purposes, but strictly as a planning reference tool.

Site-specific information:
These maps represent unobstructed flow conditions and may be unrepresentative when ice jams and/or debris are in place.

Extended rating:
Rating Curve Extension - The Rating Curve Extension is calculated by using either a linear, logarithmic, or hydraulic technique to extend the rating curve above the currently established relationship between stage and flow.

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If you notice any errors in the below information, please contact our Webmaster
26 EXTENSIVE FLOODING IN LAMBERTVILLE WITH ALL OF THE LOW-LYING AREAS OF TOWN INUNDATED.
17 WATER IS UP TO THE TOP OF THE FREE BRIDGE PIERS.
16.5 WATER IS TWO-THIRDS OF THE WAY UP CORYELLE STREET IN NEW HOPE.
16 WATER IS AT THE TOP OF THE WALL IN THE WATERWORKS PARKING GARAGE (RIVER SIDE) IN NEW HOPE.
15 RIVER ROAD IN NEW HOPE BEGINS TO FLOOD.
14.5 PARK FLOODS ON EAST FERRY STREET IN NEW HOPE. PATIO FLOODS IN REAR OF THE LANDING. WATERVIEW PARKING GAGAGES IN NEW HOPE BEGIN TO FLOOD.
14 WATER COVERS THE ENTIRE PARKING GARAGE AT THE WATERWORKS CONDOMINIUMS IN NEW HOPE.
13.5 FLOODING OCCURS ON WATERLOO STREET IN NEW HOPE VIA STORM SEWERS.
13 WATER IS AT THE TOP OF THE STONE RETAINING WALL AT THE LANDING IN NEW HOPE. THE WATERWORKS CONDOMINIUM PARKING GARAGE IN NEW HOPE BEGINS TO FLOOD. RESIDENTS ALONG THE NORTH AND SOUTH ENDS OF LAMBERT LANE IN LAMBERTVILLE SUSTAIN MINOR FLOODING, BASEMENTS BEGIN TO FLOOD.
12.5 THE LOWER PARKING LOT BEGINS TO FLOOD AT THE LAMBERTVILLE STATION INN AND RESTAURANT.
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During winter months, cold and ice may result in inaccurate real-time stream stage and streamflow data. Adjustments or deletions of this data can only be done after detailed analysis.
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Page last modified: 16-Jul-2014 2:12 AM
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Graphical representation of flood inundation for NWS flood categories are based on steady state hydraulic modeling of water surface elevations for incremented discharges. Map shows approximate inundation areas for given water surface elevations and should not be used for navigation or permitting or other legal purposes, but strictly as a planning reference tool.