Millstone River at Griggstown
Flood levels
Official flood levels at this gauge: action stage begins at 9.5 ft; minor flooding begins at 10.0 ft; moderate flooding begins at 12.0 ft; major flooding begins at 15.0 ft.
| Action stage | 9.5 ft |
|---|---|
| Minor flooding | 10.0 ft |
| Moderate flooding | 12.0 ft |
| Major flooding | 15.0 ft |
Highest recorded crests
- 24.2 ft on Aug 28, 2011 (historic crest)
- 23.4 ft on Sep 2, 2021 (historic crest)
- 23.2 ft on Sep 16, 1999 (historic crest)
- 22.7 ft on Aug 28, 1971 (historic crest)
What the water does
National Weather Service impact statements for this gauge, in the Weather Service's own words.
| 9.5 ft | Griggstown Causeway is closed. |
|---|---|
| 10.0 ft | River Road in Montgomery Township begins to flood near the Griggstown Causeway. |
| 12.0 ft | River Road flooding expands near the Griggstown Causeway and begins south of Dead Tree Run Road. |
| 15.0 ft | River Road flooding expands. The road closes between Grist Mill Drive and the Millstone Causway. Canal Road in Franklin Township floods. |
Forecast office: NWS Mount Holly · River Forecast Center: Middle Atlantic River Forecast Center.
Millstone River at Griggstown in your pocket
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Nearby stations and gauges
- Pike Run at Belle Mead NWS gauge · 2.6 mi
- Millstone River at Blackwells Mills NWS gauge · 3.3 mi
- Royce Brook at Hamilton Road NWS gauge · 4.6 mi
- Millstone River at Millstone NWS gauge · 4.6 mi
- Millstone River at Weston NWS gauge · 6.4 mi
- South Branch Raritan River at Neshanic Station NWS gauge · 7.8 mi