Millstone River at Blackwells Mills NJ
Is Millstone River at Blackwells Mills NJ flooding right now?
Millstone River at Blackwells Mills NJ measured 1.84 ft on 2026-09-11 01:15:00 UTC. That observation was 7.2 ft below its 9 ft flood stage. This is the latest available reading, not a guarantee of current conditions.
Gauge height
1.84 ft
Streamflow
144 cfs
Minor flooding here begins at 9 ft, with major flooding at 15 ft. The highest crest on record was 21.24 ft on Sun, Aug 28, 2011.
Flood forecast
Flood stages at this gauge
| Category | Stage | Current distance |
|---|---|---|
| Action | 7 ft | 5.2 ft below |
| Minor flood | 9 ft | 7.2 ft below |
| Moderate flood | 10 ft | 8.2 ft below |
| Major flood | 15 ft | 13.2 ft below |
Highest crests on record
| Stage | Date |
|---|---|
| 21.24 ft | 2011-08-28 |
| 21.01 ft | 1999-09-17 |
| 20.81 ft | 2021-09-02 |
| 19.24 ft | 2007-04-16 |
| 18.68 ft | 1971-08-28 |
Nearby gauges
| Gauge | Distance | County |
|---|---|---|
| Millstone River at Millstone NJ | 2.0 mi | Somerset County |
| Millstone River at Griggstown NJ | 3.3 mi | Somerset County |
| Royce Brook at Hamilton Road near Manville NJ | 3.3 mi | Somerset County |
| Millstone River at Weston NJ | 3.8 mi | Somerset County |
| Pike Run at Belle Mead NJ | 3.9 mi | Somerset County |
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Provisional data: Real-time readings are provisional and subject to revision by the USGS — sensors can be affected by ice, debris, or equipment malfunction. Do not rely on this site for decisions involving personal safety; follow official guidance from the National Weather Service and local authorities.