Delaware River at Delaware City (IN MLLW)

Highest listed crest 9.73 ftFlood stage 7.5 ft12 crests since 2003

The Delaware River at Delaware City (IN MLLW) crested at major flood stage 2 times among the 12 crests the National Weather Service lists from 2003 to 2024. The highest, 9.73 ft on October 30, 2012, was major flooding, 2.23 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: 9.73 ft; October 30, 2012
Flood stage: 7.5 ft; Major flooding from 9.5 ft
Crests at major: 2; 11th of 18 gauges in Delaware
Most recent flood crest: April 12, 2024; 8.59 ft, moderate flooding
Location: New Castle County; Near Wilmington (11.0 mi), Newark (11.2 mi), Middletown (11.8 mi)
Identifiers: NWS DELD1; 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 Delaware City (IN MLLW)

Flood stage (minor)	7.5	1	May 1, 2014	Minimal or no property damage, but possibly some public threat
Moderate flood stage	8.5	9	Apr 12, 2024	Some inundation of structures and roads near the stream
Major flood stage	9.5	2	Oct 29, 2021	Extensive inundation of structures and roads

Every listed crest

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

Crests at or above flood stage, by decade

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.
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 Delaware City (IN MLLW)

1	Oct 30, 2012	9.73	+2.23	Major	—
2	Oct 29, 2021	9.54	+2.04	Major	—
3	Dec 21, 2012	9.47	+1.97	Moderate	—
4	Apr 16, 2011	9.38	+1.88	Moderate	—
5	May 12, 2008	9.13	+1.63	Moderate	—
6	Sep 10, 2018	9.09	+1.59	Moderate	—
7	Jan 10, 2024	9.06	+1.56	Moderate	—
8	Aug 27, 2011	8.83	+1.33	Moderate	—
9	Jan 23, 2016	8.72	+1.22	Moderate	—
10	Sep 19, 2003	8.71	+1.21	Moderate	—
11	Apr 12, 2024	8.59	+1.09	Moderate	—
12	May 1, 2014	8.46	+0.96	Minor	—

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: 9.73 ft here, major flooding

Newbold Island (IN MLLW)PA · Oct 30, 2012 · 12.24 ft · Major
Burlington (IN MLLW)PA · Oct 30, 2012 · 11.69 ft · Major
USCG Station Washington Street (IN MLLW)PA · Oct 30, 2012 · 10.62 ft · Major
Marcus Hook (IN MLLW)PA · Oct 30, 2012 · 10.14 ft · Major · its highest

October 29, 2021: 9.54 ft here, major flooding

Burlington (IN MLLW)PA · Oct 29, 2021 · 11.30 ft · Major
Bridesburg (IN MLLW)PA · Oct 29, 2021 · 10.55 ft · Major
USCG Station Washington Street (IN MLLW)PA · Oct 29, 2021 · 10.36 ft · Major
Marcus Hook (IN MLLW)PA · Oct 29, 2021 · 9.72 ft · Major
CallicoonPA · Oct 27, 2021 · 13.68 ft · Moderate
Newbold Island (IN MLLW)PA · Oct 29, 2021 · 11.78 ft · Moderate
BarryvilleNY · Oct 27, 2021 · 18.72 ft · Minor

December 21, 2012: 9.47 ft here, moderate flooding

Burlington (IN MLLW)PA · Dec 21, 2012 · 11.61 ft · Major
USCG Station Washington Street (IN MLLW)PA · Dec 21, 2012 · 10.35 ft · Major
Marcus Hook (IN MLLW)PA · Dec 21, 2012 · 9.75 ft · Major
Newbold Island (IN MLLW)PA · Dec 21, 2012 · 12.13 ft · Moderate

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

Barryville	NY	17.0	28.97 ft, Jun 28, 2006	2
Belvidere	NJ	22.0	30.21 ft, Aug 19, 1955	5
Bridesburg (IN MLLW)	PA	8.5	10.99 ft, Jan 10, 2024	2
Burlington (IN MLLW)	PA	9.3	11.99 ft, Jan 10, 2024	7
Callicoon	PA	12.0	20.38 ft, Jun 28, 2006	5
Delaware City (IN MLLW) this gauge	DE	7.5	9.73 ft, Oct 30, 2012	2
Easton	PA	22.0	44.40 ft, Aug 19, 1955	7
Frenchtown	NJ	16.0	27.79 ft, Aug 20, 1955	7
Lordville	PA	20.0	28.87 ft, Jun 28, 2006	1
Marcus Hook (IN MLLW)	PA	7.7	10.14 ft, Oct 30, 2012	4
Matamoras/Port Jervis	PA	18.0	26.60 ft, Feb 12, 1981	4
Montague	PA	25.0	35.15 ft, Aug 19, 1955	4
New Hope-Lambertville Bridge	PA	13.0	24.16 ft, Aug 20, 1955	8
Newbold Island (IN MLLW)	PA	10.2	13.22 ft, Sep 1, 2021	7
Riegelsville	NJ	22.0	38.85 ft, Aug 20, 1955	6
Stockton	PA	18.0	30.44 ft, Aug 20, 1955	5
Tocks Island	NJ	21.0	37.40 ft, Aug 19, 1955	5
Trenton	NJ	20.0	30.60 ft, Mar 8, 1904	5
USCG Station Washington Street (IN MLLW)	PA	8.2	10.66 ft, Jan 10, 2024	6
Washington Crossing	PA	16.0	27.77 ft, Aug 20, 1955	4

Other gauges in New Castle County

Flood gauges in New Castle County

Coochs Bridge	11.0	14.00 ft, Aug 4, 2020	6
Newport (IN MLLW)	7.2	10.11 ft, Oct 30, 2012	5
Wilmington (IN MLLW)	7.4	9.91 ft, Oct 30, 2012	3
Delaware Bay at Reedy Point (IN MLLW)	7.2	9.24 ft, Apr 16, 2011	1
Stanton	17.0	25.52 ft, Sep 15, 2003	4
Wooddale	7.0	17.62 ft, Sep 15, 2003	12
Newark	11.5	17.13 ft, Sep 16, 1999	1
Newark	13.0	23.00 ft, Jul 5, 1937	8

New Castle County: every hazard · River floods across the country · Delaware

NOAA National Water Prediction Service, gauge DELD1, 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.