| Blackwater River | |
|---|---|
The Blackwater at Tyler Road inWebster, NH | |
| Location | |
| Country | United States |
| State | New Hampshire |
| County | Merrimack |
| Towns | Andover,Salisbury,Webster,Hopkinton |
| Physical characteristics | |
| Source | Cilleyville |
| • location | Town ofAndover |
| • coordinates | 43°25′52″N71°52′06″W / 43.43111°N 71.86833°W /43.43111; -71.86833 |
| • elevation | 644 ft (196 m) |
| Mouth | Contoocook River |
• location | Hopkinton |
• coordinates | 43°14′47″N71°40′47″W / 43.24639°N 71.67972°W /43.24639; -71.67972 |
• elevation | 345 ft (105 m) |
| Length | 37.5 mi (60.4 km) |
| Basin features | |
| Tributaries | |
| • left | Frazier Brook |
| • right | Cascade Brook |
TheBlackwater River is a 37.5-mile-long (60.4 km)[1]river located in centralNew Hampshire in theUnited States. It is atributary of theContoocook River, part of theMerrimack Riverwatershed.
The Blackwater River is formed at Cilleyville,[2] a village in the western part of the town ofAndover, by the junction of two branch streams. Cascade Brook, the western branch, begins at Cascade Marsh in the northeast part ofSutton and flows northeast toWilmot Flat, where it is joined by the outlet ofPleasant Lake ofNew London before continuing east to Cilleyville.Frazier Brook, the northern stream branch, rises just south of Danbury village and flows south parallel toRoute 4, passing South Danbury, flowing through Eagle Pond in Wilmot and then through Bog Pond below West Andover, joining Cascade Brook just south of the outlet of Bog Pond. Kimpton Brook (formerly known as Quickwater Brook[2]), flowing easterly through the village of Wilmot Center, is the primary tributary of Eagle Pond.
From its start at Cilleyville, the Blackwater River flows east through the town of Andover, passing the village ofPotter Place. Beyond Andover village, the river continues to wind its way east, eventually turning south near the Blackwater Bays and dropping over rapids through the village of West Salisbury to the impoundment area of theBlackwater Dam in the town ofWebster. Below the reservoir dam, the Blackwater encounters a short, intense whitewater stretch before flattening again for the final miles to the Contoocook inHopkinton.

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