Major Flood
14 ft
Current Water Level
Gage Height
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Streamflow
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Last Reading
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FLOOD STAGES
Know the flood categories.
Flood stages defined by the National Weather Service. Gage height data from USGS Water Resources.
Moderate Flood
12 ft
Minor Flood
8 ft
Action Stage
6 ft
What Floods at Each Level
12 ft
Flood 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 ft
Water up to Wing Road south of Hazen Road. End portion of Garneau Road inundated.
9 ft
River Road inaccessible from Beech Hill Road to Moose Trail Road, cutting off properties.
8 ft
Flooding begins along River Road in the vicinity of Black Brook.
Impact statements from the National Weather Service, describing what typically happens at each water level.
7-Day Water Level Chart
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Historic Crests
| Date | Stage | Flow |
|---|---|---|
| Nov 11, 1995 | 12.34 ft | 11,300 cfs |
| Dec 18, 2023 | 12.15 ft | 10,920 cfs |
| Oct 23, 1959 | 12.09 ft | 10,800 cfs |
About This Gauge
USGS Site
NWS LID
BETN3
River
Ammonoosuc River
County
Grafton, NH
Coordinates
44.2268°N, 71.6304°W
Get Flood Alerts for Ammonoosuc River
StormCast monitors this gauge and sends a push notification to your phone when the water level crosses into a new flood category — even at 3 AM.
Frequently Asked Questions
What is the current water level of Ammonoosuc River at Bethlehem?
The Ammonoosuc River at Bethlehem gauge is maintained by USGS (site 01137500) and reports water levels every 15 minutes. Visit this page to see the latest reading updated live, or download StormCast to get push alerts when levels rise.
What is flood stage for Ammonoosuc River at Bethlehem?
The NWS-defined flood stage for Ammonoosuc River at Bethlehem is 8 feet. Action stage begins at 6 feet. Moderate flooding starts at 12 feet, and major flooding at 14 feet.
How do I get alerts when Ammonoosuc River rises?
Download StormCast free on Google Play, go to River Gauges, and add Ammonoosuc River at Bethlehem to your watchlist. StormCast will send a push notification to your phone whenever the water level crosses into a new NWS flood category.
Where is the Ammonoosuc River at Bethlehem gauge located?
The gauge is located in Grafton County, New Hampshire at coordinates 44.2268°N, 71.6304°W. USGS site number: 01137500. Data is provided by the U.S. Geological Survey and the National Weather Service.
More Resources
Source & Notes
Data provided by: US Geological Survey, Observations courtesy of U.S. Geological Survey