Search
Menu

Explore

Hazards

Analysis

Rankings

Reference

Delaware River at Marcus Hook (IN MLLW)

Highest listed crest 10.14 ftFlood stage 7.7 ft13 crests since 2003

The Delaware River at Marcus Hook (IN MLLW) crested at major flood stage 4 times among the 13 crests the National Weather Service lists from 2003 to 2024. The highest, 10.14 ft on October 30, 2012, was major flooding, 2.44 feet above flood stage. 4 other gauges on the Delaware River crested above flood stage within a week of it, 1 at its own highest listed crest.

The gauge

Highest listed crest
10.14 ft
October 30, 2012
Flood stage
7.7 ft
Major flooding from 9.7 ft
Crests at major
4
56th of 170 gauges in Pennsylvania
Most recent flood crest
April 12, 2024
8.80 ft, moderate flooding
Location
Delaware County
Near Chester (3.1 mi), Wilmington (8.3 mi), Darby (10.9 mi)
Identifiers
NWS MRCP1
No USGS station

Flood stages

The thresholds the National Weather Service uses for this gauge today, and how many listed crests reached each.

Flood categories, Delaware River at Marcus Hook (IN MLLW)
Flood stage (minor)7.70—Minimal or no property damage, but possibly some public threat
Moderate flood stage8.79Apr 12, 2024Some inundation of structures and roads near the stream
Major flood stage9.74Oct 29, 2021Extensive inundation of structures and roads

Every listed crest

13 crests from 2003 to 2024. Filled: at or above flood stage. Hover a crest for its date and stage.

Listed crests at the Delaware River at Marcus Hook (IN MLLW), 2003 to 2024 7891011ft Flood stage 7.7 ftMajor 9.7 ft Sep 19, 2003: 9.11 ft, moderate floodingApr 16, 2011: 9.76 ft, major floodingAug 28, 2011: 9.04 ft, moderate floodingOct 30, 2012: 10.14 ft, major floodingDec 21, 2012: 9.75 ft, major floodingMay 1, 2014: 9.11 ft, moderate floodingSep 10, 2018: 9.24 ft, moderate floodingNov 26, 2018: 8.76 ft, moderate floodingOct 29, 2021: 9.72 ft, major floodingDec 18, 2023: 8.72 ft, moderate floodingJan 10, 2024: 9.66 ft, moderate floodingMar 9, 2024: 8.70 ft, moderate floodingApr 12, 2024: 8.80 ft, moderate flooding Highest, 10.14 ft, Oct 30, 2012 20052010201520202025

Crests at or above flood stage, by decade

Crests at or above flood stage per decade, Delaware River at Marcus Hook (IN MLLW) 2000s: 1 2010s: 7 7 2020s: 5 2000s2010s2020s
  1. These are the crests the local National Weather Service office lists for the gauge: the highest on record and recent crests. Lesser floods between them may be missing, so counts by decade are a floor.
  2. Categories use today's flood stages. Levees, dams and channel changes since a crest can make old and new stages not directly comparable.

Highest crests

Highest listed crests, Delaware River at Marcus Hook (IN MLLW)
1Oct 30, 201210.14+2.44Major—
2Apr 16, 20119.76+2.06Major—
3Dec 21, 20129.75+2.05Major—
4Oct 29, 20219.72+2.02Major—
5Jan 10, 20249.66+1.96Moderate—
6Sep 10, 20189.24+1.54Moderate—
7Sep 19, 20039.11+1.41Moderate—
8May 1, 20149.11+1.41Moderate—
9Aug 28, 20119.04+1.34Moderate—
10Apr 12, 20248.80+1.10Moderate—
11Nov 26, 20188.76+1.06Moderate—
12Dec 18, 20238.72+1.02Moderate—
13Mar 9, 20248.70+1.00Moderate—

The worst floods along the Delaware River

For this gauge's highest crests, the other gauges on the Delaware River that crested above flood stage within a week.

October 30, 2012: 10.14 ft here, major flooding

April 16, 2011: 9.76 ft here, major flooding

December 21, 2012: 9.75 ft here, major flooding

Gauges on the Delaware River

Flood gauges sharing the river's name, linked within 80 miles of one another.

Flood gauges on the Delaware River
BarryvilleNY17.028.97 ft, Jun 28, 20062
BelvidereNJ22.030.21 ft, Aug 19, 19555
Bridesburg (IN MLLW)PA8.510.99 ft, Jan 10, 20242
Burlington (IN MLLW)PA9.311.99 ft, Jan 10, 20247
CallicoonPA12.020.38 ft, Jun 28, 20065
Delaware City (IN MLLW)DE7.59.73 ft, Oct 30, 20122
EastonPA22.044.40 ft, Aug 19, 19557
FrenchtownNJ16.027.79 ft, Aug 20, 19557
LordvillePA20.028.87 ft, Jun 28, 20061
Marcus Hook (IN MLLW) this gaugePA7.710.14 ft, Oct 30, 20124
Matamoras/Port JervisPA18.026.60 ft, Feb 12, 19814
MontaguePA25.035.15 ft, Aug 19, 19554
New Hope-Lambertville BridgePA13.024.16 ft, Aug 20, 19558
Newbold Island (IN MLLW)PA10.213.22 ft, Sep 1, 20217
RiegelsvilleNJ22.038.85 ft, Aug 20, 19556
StocktonPA18.030.44 ft, Aug 20, 19555
Tocks IslandNJ21.037.40 ft, Aug 19, 19555
TrentonNJ20.030.60 ft, Mar 8, 19045
USCG Station Washington Street (IN MLLW)PA8.210.66 ft, Jan 10, 20246
Washington CrossingPA16.027.77 ft, Aug 20, 19554

Other gauges in Delaware County

Flood gauges in Delaware County
Chadds Ford9.021.04 ft, Sep 2, 202117
Chester8.024.60 ft, Sep 13, 19719
Mt. Moriah Cemetery11.018.05 ft, Aug 4, 20201

Delaware County: every hazard · River floods across the country · Pennsylvania

NOAA National Water Prediction Service, gauge MRCP1, retrieved October 30, 2026. Stages in feet on the gauge's own datum, not elevation. Crests are as the National Weather Service lists them; preliminary values may be revised.