Delaware River at Marcus Hook (IN MLLW)
Stage at this gauge is reported IN MLLW.
Flood levels
Official flood levels at this gauge: minor flooding begins at 7.7 ft; moderate flooding begins at 8.7 ft; major flooding begins at 9.7 ft.
| Minor flooding | 7.7 ft |
|---|---|
| Moderate flooding | 8.7 ft |
| Major flooding | 9.7 ft |
Highest recorded crests
- 10.1 ft on Oct 30, 2012 (historic crest)
- 9.8 ft on Apr 16, 2011 (historic crest)
- 9.8 ft on Dec 21, 2012 (historic crest)
- 9.7 ft on Oct 29, 2021 (historic crest)
What the water does
National Weather Service impact statements for this gauge, in the Weather Service's own words.
| 7.7 ft | (MLLW) MINOR FLOODING. |
|---|---|
| 7.9 ft | (MLLW) The Repaupo Creek overflows onto Flood Gates Road in Greenwich Township and Logan Township NJ. |
| 8.0 ft | (MLLW) COASTAL FLOOD ADVISORY LEVEL. |
| 8.1 ft | (MLLW) Flooding begins along Mantua Creek in Gloucester County NJ. Flooding begins along Island Road, High Hill Road, Center Square Road and Pedricktown Road in Logan Township NJ. Flooding begins along US 130 at Oldmans Creek. |
| 8.3 ft | (MLLW) Flooding begins along the Nehonsey Brook in Gibbstown (Greenwich Township) NJ at South Poplar Street and Democrat Road. |
| 8.5 ft | (MLLW) Flooding begins in Tinicum Township PA between Philadelphia International Airport and Essington, and along the lower Darby Creek. |
| 8.7 ft | (MLLW) MODERATE FLOODING. At this level, additional roadways near the river and its tidal tributaries in Delaware County, Pennsylvania and Gloucester County, New Jersey 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. |
| 9.7 ft | (MLLW) MAJOR FLOODING. At this level, widespread roadway flooding begins near the river and its tidal tributaries in Delaware County, Pennsylvania and Gloucester County, New Jersey. 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. |
| 9.7 ft | (MLLW) The level reached on October 29, 2021. |
| 9.8 ft | (MLLW) The level reached on December 21, 2012. |
| 9.8 ft | (MLLW) The level reached on April 16, 2011. |
| 10.1 ft | (Mean Lower Low Water (MLLW)) The level reached on October 30, 2012 during Post Tropical Cyclone Sandy. |
Forecast office: NWS Mount Holly · River Forecast Center: Middle Atlantic River Forecast Center.
A NOAA tide station shares this spot: Marcus Hook, with tide predictions and official flood levels.
Delaware River at Marcus Hook (IN MLLW) in your pocket
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Nearby stations and gauges
- Marcus Hook NOAA tide station · 0.0 mi
- Bridgeport NOAA tide station · 2.9 mi
- Pedricktown NOAA tide station · 3.5 mi
- Chester Creek near Chester NWS gauge · 4.0 mi
- Edgemoor NOAA tide station · 6.1 mi
- Wanamaker Bridge NOAA tide station · 7.2 mi