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Draft:Sagadahoc River


Sagadahoc River
Bath Iron Works on the Sagadahoc River
Location
CountryUnited States
Physical characteristics
Source 
 • locationMerrymeeting Bay
 • elevation0 feet (0 m)
Mouth 
 • location
Gulf of Maine, Atlantic Ocean
 • coordinates
43°44′06″N 69°46′26″W / 43.7350850°N 69.7739341°W / 43.7350850; -69.7739341
 • elevation
sea level
Length19 mi (31 km)
Sagadahoc River
Merrymeeting Bay
Whiskeag Creek
US 1.svg US 1 Bath
Rockland Branch
Sasanoa River
Winnegance Creek
Back River
Sagadahoc Estuary
Gulf of Maine

The Sagadahoc River is a 19-mile-long (31 km) tidal river in the U.S. state of Maine, forming part of the lower Kennebec River system. It lies downstream of Merrymeeting Bay and flows past Bath before emptying into the Atlantic Ocean, serving as a key channel connecting inland waters to the coast.[1] The river gives its name to Sagadahoc County.

Route

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The Sagadahoc River begins at Merrymeeting Bay and flows south as the tidal lower reach of the Kennebec River. Passing through Bath, it is crossed by the Sagadahoc Bridge carrying U.S. Route 1, as well as the adjacent Carlton Bridge, which carries the Maine Central Railroad Rockland Branch. In this area, the river forms a wide, navigable channel that supports shipbuilding and maritime traffic, including operations at Bath Iron Works.[2]

South of Bath, the river broadens into an estuarine reach with numerous coves, islands, and peninsulas shaping its shoreline. It continues along the coast of Phippsburg, remaining tidal and navigable as it approaches the open coast. The river ultimately empties into the Atlantic Ocean near Popham Beach State Park, where it meets the Gulf of Maine.

Estuary

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The Sagadahoc River estuary forms the broad, tidal lower reach of the Kennebec River, where the channel widens and is divided by a series of large coastal islands. Along its eastern side, the two island towns of Arrowsic and Georgetown separate the main river channel from adjacent tidal passages, while the mainland town of Phippsburg forms the western shoreline. These landforms create multiple channels that carry tidal flow between the upper estuary and the open coast.

One of the principal secondary channels is the Back River, which runs along the inland side of Georgetown Island and reconnects with the Kennebec, forming a parallel tidal route. To the north, the Sasanoa River provides an important connection between the Kennebec estuary at Woolwich and the neighboring Sheepscot River system, linking the two estuaries through a navigable tidal corridor.[3]

These interconnected waterways create a continuous estuarine network shaped by strong tidal currents and the surrounding islands. The system remains navigable throughout, with channels historically used for transportation, fishing, and access between inland settlements and the coast. The estuary opens into the Atlantic Ocean at Popham Beach, where the Kennebec’s outflow meets the Gulf of Maine.

References

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  1. ↑ Water resources of the Kennebec River Basin, Maine, with a section on the Quality of Kennebec River water (Report). US Geological Survey. 1907. doi:10.3133/wsp198.
  2. ↑ "General Dynamics". Bath Iron Works. Retrieved 2026-04-18.
  3. ↑ "NOAA: Data Access Viewer". coast.noaa.gov. Retrieved 2026-04-18.
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Wikimedia Commons logo Media related to Sheepscot River at Wikimedia Commons

Category:Rivers of Sagadahoc County, Maine Category:Rivers of Maine