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Upper Ammonoosuc River
The Upper Ammonoosuc at the covered bridge in Stark, New Hampshire
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Location
Country	United States
State	New Hampshire
County	Coos
Towns and city	Randolph, Berlin, Milan, Dummer, Stark, Northumberland
Physical characteristics

Source	Pond of Safety
• location	Randolph
• coordinates	44°24′31″N 71°20′22″W / 44.40861°N 71.33944°W / 44.40861; -71.33944
• elevation	2,190 ft (667.5 m)

Mouth	Connecticut River
• location	Groveton
• coordinates	44°35′18″N 71°32′4″W / 44.58833°N 71.53444°W / 44.58833; -71.53444
• elevation	845 ft (258 m)
Length	42.4 mi (68.2 km)
Basin features
Tributaries
• left	West Branch, Mill Brook, Roaring Brook
• right	North Branch, Phillips Brook, Nash Stream, Potter Brook

The Upper Ammonoosuc River is a tributary of the Connecticut River that flows through Coös County in the northern part of the northeastern U.S. state of New Hampshire. Despite its name, the river is not an upstream portion of the Ammonoosuc River, but instead a separate tributary of the Connecticut River flowing from 20 to 60 miles (32 to 97 km) north of the Ammonoosuc.

The Upper Ammonoosuc rises in Pond of Safety in the town of Randolph, runs first generally north through rural portions of Berlin (where it flows through the Godfrey Dam), Milan and a corner of Dummer, then west through Stark and then Northumberland, where it drains into the Connecticut near the village of Groveton. The end points of that 42.4-mile (68.2 km) course are approximately 25 air miles (38 km) apart.^[1]

From Milan to Groveton it is fairly closely paralleled by New Hampshire Route 110.

Fort Wentworth was built in 1755 at the junction of the Upper Ammonoosuc and Connecticut rivers (now near the village of Groveton). The fort was used sporadically during the French and Indian War and the American Revolutionary War.

The watershed area includes the northern Crescent Range, eastern Pliny Range, and the eastern and northern Pilot Range, all in the White Mountains. Major tributaries of the Upper Ammonoosuc include:

Nash Stream, rising in the township of Odell
Phillips Brook, rising in Erving's Location
the North Branch of the Upper Ammonoosuc, flowing roughly parallel to and east of the main stem (with a ridge between them that includes Hodgdon Hill and carries NH Rte. 110) in the town of Milan, to join it at West Milan
the West Branch of the Upper Ammonoosuc, rising on the eastern slope of Mount Cabot in Kilkenny, draining Unknown Pond and York Pond, and joining the main stem below the Godfrey Dam.

References

[edit]

^ "New Hampshire GRANIT state geographic information system". Retrieved February 5, 2021.

Connecticut River watershed

Tributaries

Connecticut	Blackledge River Coginchaug River Connecticut River Duck River Eightmile River Falls River Farmington River Hockanum River Hubbard River Jeremy River Lieutenant River Mattabesset River Nepaug River Pameacha Creek Park River Pequabuck River Salmon River Scantic River
Massachusetts	Burnshirt River Chapel Brook Chicopee River Connecticut River Cranberry River Deerfield River East Brookfield River Farmington River Fall River Five Mile River Green River Hubbard River Manhan River Mill River (Northampton) Mill River (Springfield) Millers River Mirey Brook North Branch Millers River North Branch Westfield River North River Otter River Quaboag River Scantic River Seven Mile River Tarbell Brook Ware River Westfield River
New Hampshire	Ammonoosuc River Ashuelot River Blow-me-down Brook The Branch Cold River Connecticut River East Branch Mohawk River Gale River Great Brook Halls Stream Ham Branch Indian River Indian Stream Israel River Johns River Knox River Little River Little Sugar River Mascoma River Millers River Mink Brook Mirey Brook Mohawk River Nash Stream North Branch Gale River North Branch Millers River North Branch Sugar River North Branch Upper Ammonoosuc River Oliverian Brook Otter Brook Partridge Brook Perry Stream Phillips Brook Simms Stream South Branch Ashuelot River South Branch Gale River South Branch Israel River South Branch Sugar River Stocker Brook Sugar River Tarbell Brook Upper Ammonoosuc River West Branch Mohawk River West Branch Upper Ammonoosuc River Wild Ammonoosuc River Zealand River
Vermont	Black River Connecticut River Deerfield River Fall River Green River Halls Stream Leach Creek Moose River Nulhegan River Ompompanoosuc River Ottauquechee River Passumpsic River Rock River Saxtons River Utley Brook Waits River Wells River West River Whetstone Brook White River Williams River Winhall River

Lakes

Connecticut	Barkhamsted Reservoir Lake Beseck Lake Hayward Lake Pocotopaug
Massachusetts	Brooks Pond Browning Pond Lake Monomonac Quabbin Reservoir Lake Wyola
New Hampshire	Ashuelot Pond Back Lake Canaan Street Lake Cedar Pond Christine Lake Comerford Reservoir Connecticut Lakes Crystal Lake Dublin Pond Eastman Pond Echo Lake Lake Francis (Murphy Dam) Goose Pond Grafton Pond Granite Lake Lakes of the Clouds Little Sunapee Lake Mascoma Lake McIndoes Reservoir Lake Monomonac Moore Reservoir Pearly Lake Silver Lake Spofford Lake Lake Sunapee Surry Mountain Lake Lake Tarleton
Vermont	Ball Mountain Lake Comerford Reservoir Harriman Reservoir Harvey's Lake McIndoes Reservoir Moore Reservoir North Hartland Lake Lake Rescue Townshend Lake

Towns

Connecticut	Chester Cromwell Deep River East Haddam East Hampton East Hartford East Windsor Enfield Essex Glastonbury Haddam Hartford Higganum Lyme Middletown Moodus Old Lyme Old Saybrook Portland Rocky Hill South Windsor Suffield Thompsonville Wethersfield Windsor Windsor Locks
Massachusetts	Agawam Chicopee Deerfield Easthampton Gill Greenfield Hadley Hatfield Holyoke Longmeadow Millers Falls Montague Northampton Northfield South Hadley Springfield Sunderland Turners Falls West Springfield Whately
New Hampshire	Bath Charlestown Chesterfield Claremont Clarksville Colebrook Columbia Cornish Dalton Groveton Hanover Haverhill Hinsdale Lancaster Lebanon Littleton Lyme Monroe Northumberland Orford Piermont Pittsburg Plainfield Stewartstown Stratford Walpole West Lebanon Westmoreland Woodsville
Quebec	East Hereford
Vermont	Ascutney Barnet Beecher Falls Bellows Falls Bloomfield Bradford Brattleboro Brunswick Canaan Concord Dummerston Fairlee Gilman Guildhall Hartford Hartland Lemington Lunenburg Maidstone Newbury Norwich Putney Rockingham Ryegate Springfield Thetford Vernon Waterford Weathersfield Wells River Westminster White River Junction Wilder Windsor

Crossings

Rivers of New Hampshire by drainage system

Gulf of Maine

Atlantic coastal tributaries	Blackwater River Browns River Drakes River Hampton River Hampton Falls River Little River Old River Taylor River
Merrimack River watershed	Baboosic Brook Back River Baker River Bear Brook Beards Brook Beaver Brook Beebe River Big River Black Brook Blackwater River Cockermouth River Cohas Brook Contoocook River East Branch Baker River East Branch Pemigewasset River Fowler River Frazier Brook Gridley River Gunstock River Lane River Little River (Big River) Little River (Merrimack River) Little Massabesic Brook-Sucker Brook Little Suncook River Lost River Mad River Melvin River Merrimack River Merrymeeting River Middle Branch Piscataquog River Moosilauke Brook Nashua River Newfound River Nissitissit River North Branch Contoocook River North Fork East Branch Pemigewasset River Nubanusit Brook Pemigewasset River Pennichuck Brook Piscataquog River Powwow River Purgatory Brook Red Hill River Salmon Brook Shedd Brook Smith River Soucook River Souhegan River South Branch Baker River South Branch Piscataquog River South Branch Souhegan River Spicket River Squam River Stony Brook Suncook River Tioga River Turkey River Warner River West Branch Mad River West Branch Souhegan River West Branch Warner River Winnipesaukee River
Merrymeeting Bay (Androscoggin River watershed)	Androscoggin River Chickwolnepy Stream Clear Stream Dead River Dead Diamond River East Branch Dead Diamond River Little Dead Diamond River Little Magalloway River Magalloway River Middle Branch Dead Diamond River Middle Branch Little Magalloway River Mollidgewock Brook Moose Brook Moose River Peabody River Rattle River South Branch Little Dead Diamond River Swift Diamond River West Branch Dead Diamond River West Branch Little Dead Diamond River West Branch Little Magalloway River West Branch Magalloway River West Branch Peabody River Wild River
Piscataqua River watershed	Bean River Bellamy River Berrys River Branch River Bunker Creek Cochecho River Ela River Exeter River Fresh River Isinglass River Jones Brook Lamprey River Little River (Brentwood) Little River (Exeter) Little River (Lamprey River) Mad River North River North Branch River Oyster River Pawtuckaway River Piscassic River Piscataqua River Rattlesnake River Salmon Falls River Squamscott River Winnicut River
Saco Bay (Saco River watershed)	Bearcamp River Beech River Chocorua River Cold River (Bearcamp River) Cold River Cutler River Dan Hole River Deer River Dry River East Branch Saco River East Branch Whiteface River East Fork East Branch Saco River Ellis River Little Cold River Lovell River Mad River Middle Branch Mad River Mill Brook New River Ossipee River Pequawket Brook Pine River Rocky Branch Saco River Sawyer River Shepards River South River South Branch Mad River Swift River (Bearcamp River) Swift River (Saco River) West Branch Whiteface River Wildcat Brook Wonalancet River

Long Island Sound

Connecticut River watershed

See also

References