Millstone River at Blackwells Mills
Flood levels
Official flood levels at this gauge: action stage begins at 7.0 ft; minor flooding begins at 9.0 ft; moderate flooding begins at 10.0 ft; major flooding begins at 15.0 ft.
| Action stage | 7.0 ft |
|---|---|
| Minor flooding | 9.0 ft |
| Moderate flooding | 10.0 ft |
| Major flooding | 15.0 ft |
Highest recorded crests
- 21.2 ft on Aug 28, 2011 (historic crest)
- 21.0 ft on Sep 17, 1999 (historic crest)
- 20.8 ft on Sep 2, 2021 (historic crest)
- 19.2 ft on Apr 16, 2007 (historic crest)
What the water does
National Weather Service impact statements for this gauge, in the Weather Service's own words.
| 6.0 ft | The Griggstown Causeway is closed due to flooding. |
|---|---|
| 7.0 ft | Several more causeways are closed due to flooding. |
| 9.0 ft | Flood stage reached with flooding now along River Road in Blackwells Mills and S. River Street in Millstone. Base of Route 533 bridge floods. River Road between Yorktown and Amsterdam is subject to closure. Canal Road near Suydam Road floods. |
| 10.0 ft | The D&R Canal is flooded by the Millstone River. |
| 13.0 ft | Washington Street and several businesses are flooded. |
Forecast office: NWS Mount Holly · River Forecast Center: Middle Atlantic River Forecast Center.
Millstone River at Blackwells Mills in your pocket
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Nearby stations and gauges
- Millstone River at Millstone NWS gauge · 2.0 mi
- Millstone River at Griggstown NWS gauge · 3.3 mi
- Royce Brook at Hamilton Road NWS gauge · 3.3 mi
- Millstone River at Weston NWS gauge · 3.8 mi
- Pike Run at Belle Mead NWS gauge · 3.9 mi
- Raritan River at Bound Brook NWS gauge · 5.5 mi