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Delaware River at Matamoras/Port Jervis, PA (MTMP1)


Data Type




Inundation Levels
NAVD88 Stage

442.5*27.7*
441.9*27.1*
Record Crest: 26.6 ft
441.3*26.5*
440.7*25.9*
440.125.3
439.524.7
439.124.3
438.723.9
438.123.3
437.522.7
437.322.5
436.822.0

Major Flooding Begins

436.021.2
435.520.7
434.920.1

Moderate Flooding Begins

434.319.5
433.718.9
433.118.3

Minor Flooding Begins

432.417.6
431.817.0
431.216.4

Near Flooding Begins

430.615.8
429.915.1
429.314.5
428.713.9
428.013.2
427.512.7
426.912.1
426.411.6
425.710.9
* = Extended rating
Weather Forecast Office Binghamton, NY Middle Atlantic River Forecast Center
Hydrograph River at a Glance Download Inundation
Mapping
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Click on mapped inundation to see water depth values for that location, or hold shift and drag to zoom to area.

Current Stage:
5.0 ft at 10/16/2018 12:30:00 UTC
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Inundation Legend
Depth in feet
USGS Gauge Location Gauge Location
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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: 21.5
Moderate Flood Stage: 20
Flood Stage: 18
Action Stage: 16
Low Stage (in feet): -9999

Historic Crests
(1) 26.60 ft on 02/12/1981
(2) 25.50 ft on 03/08/1904
(3) 23.91 ft on 08/19/1955
(4) 23.10 ft on 10/10/1903
(5) 21.47 ft on 06/28/2006
Show More Historic Crests

(P): Preliminary values subject to further review.

Recent Crests
(1) 21.47 ft on 06/28/2006
(2) 20.52 ft on 04/03/2005
(3) 19.52 ft on 09/18/2004
(4) 18.37 ft on 01/20/1996
(5) 26.60 ft on 02/12/1981
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:
Flood categories were updated on Aug 6, 2018. Categories for inundation maps will be updated on a date TBD - please only use the "Inundation Levels" option on the inundation mapping tab. 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.

Flood Impacts Collapse
If you notice any errors in the below information, please contact our Webmaster
26.6 Record crest from the 1981 ice jam flood. Damage occurred to 950 structures, totalling 14.7 million dollars.
23.9 Flooding overtops the flood walls on the New York and Pennsylvania sides of the river. Widespread flooding occurs with significant damage throughout Port Jervis NY, Matamoras PA, and Montague Township NJ.
22 Low points along flood walls and the river banks are reached in Matamoras which contributes to a considerable amount of inundation in town. Low areas of Port Jervis flood.
21.5 This is the crest of the June 2006 flood. Flooding is extensive in Westfall Township, portions of Matamoras and Montague Township. Serious backwater flooding occurs near the confluence of the Neversink River near Port Jervis.
21 The river is bank full on the New York side. Riverside Park to West End Beach areas in Port Jervis will flood.
20.5 This is the level of the significant April 2005 flood.
20 Flooding worsens from Cemetery Road and Rose Lane, to Avenue R and 10th Street in Matamoras. Inundation increases around the plazas along U.S. Route 6 in Westfall. Flooding at the confluence of the Neversink River increases.
19.5 Inundation covers roads and parking lots near the Delaware Valley High School, Milford Senior Care facility, and the shopping plazas in Westfall Township. Several properties on the New Jersey side of the river begin to flood.
19 Properties along Rose Lane in Matamoras are impacted by flood waters. Backwater flooding affects property and basements on Avenue R.
18 Water begins to back up into the southwest side of Matamoras near Airport Park, 10th Street and Avenue S. The river may back up storm drains into portions of Port Jervis between Railroad Ave., and Water Street. The Neversink begins backing into neighborhoods when the Delaware reaches this stage.
16 Parts of Delaware Drive upstream of Matamoras begin to flood. Backwater starts to affect properties in Westfall Township along U.S. 6 from Delaware Valley High School to Home Depot.
15 Access Road to Mashipacong Island begins to take on water.
Other Data Sources Collapse
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Potential River Levels - Used to
Potential River Levels
Used to Estimate the Chance of Flooding and the Range of Possible River Levels
3 Day (SREF) 7 Day (NAEFS) 7 Day (GEFS)
SREF Ensemble NAEFS Ensemble  GEFS Ensemble 

Note: Use the official hydrograph at the top of this web page for river levels within the next 48 hours.

See the Product Description Document link for more details on the interpretation of the 3,7 day graphics. 

Click individual graphics to enlarge.

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Page last modified: 21-Dec-2016 10:42 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.