Major Flood
23 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
21 ft
Minor Flood
18 ft
Action Stage
15 ft
What Floods at Each Level
25.6 ft
Record flood comparable to the flood of 1936.
25 ft
Water reaches US Route 2 Bridge Street in Lancaster, causing major regional travel disruptions. Floodwaters completely isolate several homes.
23 ft
Water flows over US Route 3 in Lancaster near Industrial Park Road. Water also reaches US Route 2 Bridge Street.
22 ft
Route 135 in Dalton is inundated. Homes flood along Route 135 north of the Johns River.
21 ft
In Guildhall, VT, Route 102 floods just north of the Route 2 bridge to Lancaster, as well as near Breault Road at the Washburn Brook crossing. In Dalton, Route 135 floods at the public boat launch. Basements flood at a few residences along Route 135 north of the Johns River.
20 ft
Floodwaters cut off access to a few homes along Route 135 in Lancaster. Several riverside camps along Route 135 north of the Johns River are flooded. River Road is underwater between the Mt. Orne Bridge and South Lunenburg.
19 ft
Basements of low-lying homes in Dalton and Lancaster are at risk of flooding. Water begins to encroach on Route 135 at the Dalton public boat launch.
18 ft
Water inundates campgrounds, agricultural fields, and recreational fields off Bridge Street in Lancaster.
17 ft
Minor lowland flooding begins.
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 |
|---|---|---|
| Mar 19, 1936 | 25.6 ft | 48,300 cfs |
| Mar 31, 1998 | 23.7 ft | 41,000 cfs |
| Mar 18, 1990 | 23.22 ft | 38,700 cfs |
About This Gauge
USGS Site
NWS LID
DLTN3
River
Connecticut River
County
Coos, NH
Coordinates
44.4101°N, 71.7206°W
Get Flood Alerts for Connecticut 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 Connecticut River at Dalton?
The Connecticut River at Dalton gauge is maintained by USGS (site 01131500) 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 Connecticut River at Dalton?
The NWS-defined flood stage for Connecticut River at Dalton is 18 feet. Action stage begins at 15 feet. Moderate flooding starts at 21 feet, and major flooding at 23 feet.
How do I get alerts when Connecticut River rises?
Download StormCast free on Google Play, go to River Gauges, and add Connecticut River at Dalton 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 Connecticut River at Dalton gauge located?
The gauge is located in Coos County, New Hampshire at coordinates 44.4101°N, 71.7206°W. USGS site number: 01131500. Data is provided by the U.S. Geological Survey and the National Weather Service.
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Source & Notes
Data provided by: US Geological Survey, Observations courtesy of U.S. Geological Survey