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Connecticut River at Dalton

National Weather Service gauge DLTN3 · New Hampshire · Coos County · 44.4101, -71.7206 · USGS 01131500

Flood levels

Official flood levels at this gauge: action stage begins at 15.0 ft; minor flooding begins at 18.0 ft; moderate flooding begins at 21.0 ft; major flooding begins at 23.0 ft.

Action stage15.0 ft
Minor flooding18.0 ft
Moderate flooding21.0 ft
Major flooding23.0 ft

Highest recorded crests

What the water does

National Weather Service impact statements for this gauge, in the Weather Service's own words.

17.0 ftMinor lowland flooding begins.
18.0 ftWater inundates campgrounds, agricultural fields, and recreational fields off Bridge Street in Lancaster.
19.0 ftBasements 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.
20.0 ftFloodwaters 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.
21.0 ftIn 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.
22.0 ftRoute 135 in Dalton is inundated. Homes flood along Route 135 north of the Johns River.
23.0 ftWater flows over US Route 3 in Lancaster near Industrial Park Road. Water also reaches US Route 2 Bridge Street.
25.0 ftWater reaches US Route 2 Bridge Street in Lancaster, causing major regional travel disruptions. Floodwaters completely isolate several homes.
25.6 ftRecord flood comparable to the flood of 1936.

Forecast office: NWS Gray · River Forecast Center: Northeast River Forecast Center.

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