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Salmon Brook (Merrimack River tributary) facts for kids

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Salmon Brook
Salmon Brook looking downstream, Dunstable MA.jpg
Salmon Brook in Dunstable, Massachusetts
Country United States
States Massachusetts,
New Hampshire
Counties Middlesex, MA,
Hillsborough, NH
Communities Dunstable, MA, Nashua, NH
Physical characteristics
Main source Lower Massapoag Pond
Groton, MA
154 ft (47 m)
River mouth Merrimack River
Nashua, NH
95 ft (29 m)
Length 9.3 mi (15.0 km)
Discharge
  • Average rate:
    150 cu ft/s (4.2 m3/s)
Basin features
Basin size 36 square miles (93 km2)
Tributaries
  • Left:
    Hauk Brook, Joint Grass Brook, Hassells Brook
  • Right:
    Black Brook, Old Maids Brook

Salmon Brook is one of the six major tributaries of the Merrimack River in northeastern Massachusetts in the United States. Its watershed is 31 square miles (80 km2) and is one of the 14 subwatersheds of the Merrimack River. It passes through Dunstable, Massachusetts, and Nashua, New Hampshire.

Route description

Salmon Brook begins at the outlet of Lower Massapoag Pond near the center of Dunstable. It then flows approximately 9.3 miles (15.0 km) north-northeast to the Merrimack River. The water body farthest upstream in the watershed is Martins Pond just east of the center of the town of Groton. The outlet, Martins Pond Brook, runs southeast to Lost Lake/Knops Pond, the start of a chain of lakes that includes Whitney Pond, Cow Pond, and Upper and Lower Massapoag ponds. All of these water bodies are dammed. Salmon Brook runs roughly parallel to the Nashua River for its entire course from Lower Massapoag Pond to the Merrimack River.

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