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Delaware River at Riegelsville, NJ (RGLN4)


Data Type




Inundation Levels
NAVD88 Stage

168.3* 44.0*
166.1* 41.8*
165.1* 40.8*
163.4* 39.1*
Record Crest: 38.85 ft
162.0 37.7
160.6 36.3
159.2 34.9
157.7 33.4
156.3 32.0
155.5 31.2

Major Flooding Begins

154.1 29.8
153.2 28.9
152.3 28.0
151.2 26.9

Moderate Flooding Begins

149.6 25.3
148.7 24.4
147.9 23.6
147.1 22.8
146.3 22.0

Minor Flooding Begins

145.5 21.2
144.6 20.3
* = Extended rating
Weather Forecast Office Philadelphia/Mount Holly, NJ Middle Atlantic River Forecast Center

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Current Stage:
4.6 ft at 12/17/2014 18:30:00 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: 30
Moderate Flood Stage: 26
Flood Stage: 22
Action Stage: 15
Low Stage (in feet): 0

Historic Crests
(1) 38.85 ft on 08/20/1955
(2) 35.90 ft on 10/10/1903
(3) 34.07 ft on 04/03/2005
(4) 33.62 ft on 06/29/2006
(5) 32.45 ft on 03/19/1936
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(P): Preliminary values subject to further review.

Recent Crests
(1) 28.06 ft on 09/09/2011
(2) 24.51 ft on 08/29/2011
(3) 25.20 ft on 03/12/2011
(4) 22.35 ft on 03/08/2011
(5) 20.33 ft on 10/02/2010
Show More Recent Crests

(P): Preliminary values subject to further review.

Low Water Records
Currently none available.

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
30 The town of Reigelsville, Pennsylvania begins to flood.
26 River Road in Carpentersville is flooded and is subject to closures. Street flooding begins in Riegelsville at the intersection of PA Route 611 and Sycamore Road.
22 Pohatcong Creek floods Creek Road due to high and backwater from the Delaware River. The Musconetcong River also floods Mount Joy Road due to high and backwater from the Delaware River.
18 River Road floods in Pohatcong Township, north of the bridge.
15 Treasure Island Scout Camp floods.
14.5 The entrance to Bull Island State Park is closed. Unsafe to cross over to Treasure Island Scout Camp.
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Additional Information Collapse
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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The National Weather Service prepares its forecasts and other services in collaboration with agencies like the US Geological Survey, US Bureau of Reclamation, US Army Corps of Engineers, Natural Resource Conservation Service, National Park Service, ALERT Users Group, Bureau of Indian Affairs, and many state and local emergency managers across the country. For details, please click here.
NWS Information
National Weather Service
Philadelphia/Mount Holly Weather Forecast Office
732 Woodlane Road
Mount Holly, NJ 08060-9615
(609) 261-6600
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Page last modified: 18-Nov-2014 3:54 PM
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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.