Rivers in New Hampshire
Ammonoosuc River at Bethlehem
Below flood stage
1.15ftStage
Observed Mon, Sep 28, 3:30 AM EDT
- Flood stage
- 8.00 ft
- Record crest
- 12.34 ft1995
Flood stages and impacts
| Category | Stage |
|---|---|
| Major flood | 14.00 ft |
| Moderate flood | 12.00 ft |
| Minor flood | 8.00 ft |
| Action | 6.00 ft |
- 12.00 ftFlood comparable to December 2023. Significant flooding of a shopping area in Littleton off Meadow Road south of I-93 exit. Water to the bottom of the Pierce Bridge in Bethlehem and property off Route 302. Flooding also occurs along portions Route 116 or Whitefield Road. Portions of Feather Lane, Wing Road, Hazen Road, and Prospect Street are flooded.
- 10.00 ftWater up to Wing Road south of Hazen Road. End portion of Garneau Road inundated.
- 9.00 ftRiver Road inaccessible from Beech Hill Road to Moose Trail Road, cutting off properties.
- 8.00 ftFlooding begins along River Road in the vicinity of Black Brook.
Flood outlook
Chance of flooding, September to November
| Category | Chance |
|---|---|
| Minor flooding | 13% |
| Moderate flooding | 5% |
| Major flooding | Under 5% |
The three-month chances are the River Forecast Centers’ long-range flood outlook, issued September 21, 2026.
Crest history
23 crests on NOAA’s list since 1936.
| # | Date | Stage |
|---|---|---|
| 1 | November 12, 1995 | 12.34 ft |
| 2 | December 18, 2023 | 12.15 ft |
| 3 | October 24, 1959 | 12.09 ft |
| 4 | June 30, 1973 | 11.96 ft |
| 5 | March 18, 1936 | 11.24 ft |
| 6 | March 27, 1953 | 11.22 ft |
| 7 | August 28, 2011 | 10.90 ft |
| 8 | November 26, 1950 | 10.86 ft |
| 9 | December 21, 1973 | 10.69 ft |
| 10 | September 11, 1954 | 10.62 ft |
| 11 | January 27, 1986 | 10.14 ft |
| 12 | April 1, 1987 | 10.14 ft |
| 13 | December 18, 2000 | 10.09 ft |
| 14 | April 24, 2005 | 9.91 ft |
| 15 | April 29, 1988 | 9.84 ft |
| 16 | April 15, 2014 | 9.75 ft |
| 17 | April 9, 2000 | 9.26 ft |
| 18 | December 24, 2022 | 9.24 ft |
| 19 | April 14, 2002 | 9.22 ft |
| 20 | April 25, 1968 | 9.09 ft |
| 21 | February 12, 1981 | 9.00 ft |
| 22 | December 21, 1957 | 8.98 ft |
| 23 | April 12, 2024 | 8.63 ft |
Most recent crests
- April 12, 2024: 8.63 ft
- December 18, 2023: 12.15 ft
- December 24, 2022: 9.24 ft
- April 15, 2014: 9.75 ft
- August 28, 2011: 10.90 ft
- April 24, 2005: 9.91 ft
- April 14, 2002: 9.22 ft
- December 18, 2000: 10.09 ft
- April 9, 2000: 9.26 ft
- November 12, 1995: 12.34 ft
Nearby
Upstream, downstream and the gauges around this one.
What this means
Forecasts by the Northeast River Forecast Center. Forecasts are issued as needed during times of high water, but are not routinely available.
Sources
Stage, flood stages, impacts and crest history from NOAA’s National Water Prediction Service. Streamflow and the daily record from the U.S. Geological Survey.