Contoocook River at Henniker, NH
River level and flood forecast · Merrimack County
The river is 7.0 ft below flood stage (12 ft).
Forecast to rise to 6.0 ft Thu 8 AM, below the 12 ft flood stage.
Flow: 100 cubic feet per second (USGS).
Normal for October 13.
Usual for October 13: 83 to 274 cubic feet per second (the middle half of 49 years).
The last 7 days and the forecast
NWS forecast issued Mon, Oct 12, 11:14 AM. Forecasts change as rain falls and as upstream water arrives.
Get flood alerts for this river
An email when the National Weather Service forecasts Contoocook River at Henniker to flood, when it floods, and when it's over.
Flood stages
| Major flood stage | 20 ft |
| Moderate flood stage | 16 ft |
| Flood stage | 12 ft |
| Action stage | 10 ft |
| Record crest (September 21, 1938) | 21.3 ft |
What floods at each level
From the National Weather Service, highest first.
- 15 ftIn Hillsborough, Henniker Street floods with 3 feet of water and Bear Hill road is impassible.
- 14 ftIn Hillsborough, Henniker Street floods with 2 feet of water and the High Tide restaurant is inaccessible. In Henniker, Western Avenue floods.
- 13 ftIn Hillsborough, Bear Hill road floods as well as Henniker Street from High Tide restaurant to Old Henniker Road.
- 12 ftIn the town of Hillsborough, Hennicker Street and Bear Hill Road flood. In Henniker, flood waters encroach on parts of Western Avenue.
- 10 ftLowland flooding begins.
Highest crests on record
- 21.3 ft — September 21, 1938
- 14.54 ft — April 17, 2007
- 13.75 ft — October 16, 2005
- 13.48 ft — May 15, 2006
- 13.32 ft — April 3, 2004
Recent crests: 12.36 ft (July 11, 2023) · 13.25 ft (March 16, 2010) · 14.54 ft (April 17, 2007) · 13.48 ft (May 15, 2006) · 13.75 ft (October 16, 2005)
Highest flow on record
22,200 cubic feet per second — September 21, 1938. From the USGS's yearly peaks since 1938.
Up and down the river, and nearby
Not an official source. River levels, forecasts, flood stages and impacts are from the National Weather Service (HENN3); flow from the U.S. Geological Survey. Readings are provisional. In a flood, follow your local officials and the NWS at weather.gov.