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Delaware River at USCG Station Washington Street (IN MLLW)

National Weather Service gauge PHBP1 · Pennsylvania · Philadelphia County · 39.9333, -75.1417

Stage at this gauge is reported IN MLLW.

Flood levels

Official flood levels at this gauge: minor flooding begins at 8.2 ft; moderate flooding begins at 9.2 ft; major flooding begins at 10.2 ft.

Minor flooding8.2 ft
Moderate flooding9.2 ft
Major flooding10.2 ft

Highest recorded crests

What the water does

National Weather Service impact statements for this gauge, in the Weather Service's own words.

8.2 ft(MLLW) MINOR FLOODING.
8.4 ft(MLLW) Flooding begins at the east end of Linden Avenue in Northeast Philadelphia. Flooding begins at the former Navy Shipyard in Philadelphia from both the Delaware River and the Schuylkill River. Flooding begins along Admiral Wilson Boulevard (US Route 30) and Baird Avenue in Camden NJ as the Cooper River overflows.
8.5 ft(MLLW) COASTAL FLOOD ADVISORY LEVEL.
8.6 ft(MLLW) Flooding begins along the Little Timber Creek between Gloucester City and Brooklawn NJ and around the Brooklawn Circle. Flooding begins along Timber Avenue, Edgewater Avenue and NJ Route 47 in Westville NJ. Flooding begins along Woodbury Creek and Hessian Run in West Deptford Township NJ, affecting Crown Point Road. Flooding begins along River Road Drive in West Deptford Township NJ.
8.8 ft(MLLW) Flooding begins on North Park Drive in Pennsauken NJ. Water backs up into Cooper River Lake in Camden County NJ. Flooding begins on South Park Drive in Collingswood and Haddon Township NJ. Flooding begins along Woodbury Creek in Woodbury NJ.
9.0 ft(MLLW) Flooding begins along Columbus Boulevard in Philadelphia near the Ben Franklin Bridge. Generally, it is not a case of the river spilling over onto the roadway. The flooding problems tend to occur when the river is high and water begins to backup into the storm drains.
9.2 ft(MLLW) MODERATE FLOODING. At this level, additional roadways near the river and its tidal tributaries in Philadelphia and in the New Jersey counties of Camden and Gloucester begin to flood. Lives may be at risk when people put themselves in harm's way. Some damage to vulnerable structures may begin to occur. COASTAL FLOOD WARNING LEVEL.
10.2 ft(MLLW) MAJOR FLOODING. At this level, widespread roadway flooding begins near the river and its tidal tributaries in Philadelphia and in the New Jersey counties of Camden and Gloucester. Vulnerable homes and businesses may be damaged as water levels rise further above this threshold. Numerous roads become impassable and some neighborhoods may be isolated. The flood waters become a danger to anyone who attempts to cross on foot or in a vehicle.
10.3 ft(MLLW) The level reached on December 21, 2012.
10.4 ft(MLLW) The level reached on October 29, 2021.
10.5 ft(MLLW) The level reached on April 17. 2011.
10.5 ft(MLLW) The level reached on November 25, 1950.
10.5 ftIn Philadelphia, Delaware Avenue from Penn Street to Washington Avenue is closed due to flooding. The I-95 off ramp to Washington Avenue is also closed. Eastbound Race Street from 2nd Street to Delaware Avenue floods and is closed. Eastbound Spring Garden Street from Front Street to Delaware Avenue floods and is closed.
10.6 ft(MLLW) The level reached during Post Tropical Cyclone Sandy on October 30, 2012.
10.7 ft(Mean Lower Low Water (MLLW)) The level reached on January 10, 2024.

Forecast office: NWS Mount Holly · River Forecast Center: Middle Atlantic River Forecast Center.

A NOAA tide station shares this spot: PHILADELPHIA, with tide predictions and official flood levels.

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