| Suncook River | |
|---|---|
The Suncook River in the center ofSuncook, NH | |
Suncook River watershed (Interactive map) | |
| Location | |
| Country | United States |
| State | New Hampshire |
| Counties | Belknap,Merrimack |
| Towns | Gilmanton,Barnstead,Pittsfield,Chichester,Epsom,Pembroke,Allenstown |
| Physical characteristics | |
| Source | Crystal Lake |
| • location | Gilmanton Ironworks |
| • coordinates | 43°26′9″N71°18′13″W / 43.43583°N 71.30361°W /43.43583; -71.30361 |
| • elevation | 623 ft (190 m) |
| Mouth | Merrimack River |
• location | Suncook |
• coordinates | 43°7′39″N71°27′50″W / 43.12750°N 71.46389°W /43.12750; -71.46389 |
• elevation | 195 ft (59 m) |
| Length | 35.7 mi (57.5 km) |
| Basin size | 660 km2 (250 mi2) |
| Basin features | |
| Tributaries | |
| • left | Webster Stream,Big River, Crooked Run,Little Suncook River,Bear Brook, Boat Meadow Brook |
| • right | Kelley Brook, Perry Brook |
TheSuncook River is a 35.7-mile-long (57.5 km)[1]river located in centralNew Hampshire in theUnited States. It is atributary of theMerrimack River, which flows to theGulf of Maine.
The Suncook River begins at the outlet ofCrystal Lake in the town ofGilmanton, New Hampshire. The village ofGilmanton Ironworks is located at the lake's outlet. The Suncook flows south two miles to theSuncook Lakes (Upper and Lower) inBarnstead. Below the lakes, the river passes through the village ofCenter Barnstead and enters the town ofPittsfield, whosevillage is centered on a 19th century dam on the river.
The river continues south through the towns ofChichester andEpsom, and then forms the town boundary betweenPembroke andAllenstown. Shortly before reaching the Merrimack River, the Suncook drops 70 feet (21 m) in 0.5 miles (0.80 km), a natural waterpower site that led to the growth of thevillage ofSuncook.
On May 16, 2006, the Suncook River, responding to the highest rainfall amounts in at least 70 years (more than 8 inches (200 mm) dropped by a low-pressure system in three days onConcord, New Hampshire), rose toflood level and backed up behind an old mill dam, which produced a shallowly-sloping pool that overtopped a sand and gravel quarry, connected with a downstream section of channel, and cut a new shorter channel at 25–50 meters per hour in the town of Epsom.[2] Two previous channels, around Bear Island, were left dry. The new river course, approximately a mile long, is the largest channel change in a river in New Hampshire since systematic topographic mapping began in the state in the early 20th century.[3]

On September 3, 2018, there was news that work had begun to stabilize the Suncook River in its new course.[4]
In 1934, the American composerAlan Hovhaness (1911–2000), who spent time with his maternal family members inPittsfield, New Hampshire, during his youth, wrote a fantasy for cello and piano entitledLegend of the Sunkook [sic] Valley (Op. 1, no. 4).