Muddy River (Merrymeeting Bay)

The Cathance River is a 16.4-mile-long (26.4 km) river in Maine flowing into Merrymeeting Bay. It rises in Bowdoin at the junction of West Cathance and East Cathance streams and flows south into Topsham. Turning east and then northeast, it reaches tidewater at the village of Cathance within Topsham and continues northeast into the town of Bowdoinham. The river turns south again for its final course to Merrymeeting Bay.

The Randall-Hildreth House is a historic house at 806 Foreside Road in Topsham, Maine. Built in 1800, it is a fine local example of a Federal period mansion house with Georgian and Greek Revival features. It was owned by the same family for nearly 200 years, and was listed on the National Register of Historic Places in 2004.

The Androscoggin River (Abenaki: Ammoscocongon) is a river in the U.S. states of Maine and New Hampshire, in northern New England. It is 178 miles (286 km) long and joins the Kennebec River at Merrymeeting Bay in Maine before its water empties into the Gulf of Maine on the Atlantic Ocean. Its drainage basin is 3,530 square miles (9,100 km2) in area. The name "Androscoggin" comes from the Eastern Abenaki term Ammoscocongon, which referred to the entire portion of the river north of the Great Falls in Lewiston, Maine. The Anglicization of the Abenaki term is likely an analogical contamination with the colonial governor Edmund Andros.

The Butterfield-Sampson House is a historic house at 18 River Road in Bowdoinham, Maine. It is an unusual combination of an early 19th-century Federal period house, to which a Stick style house was added about 1890. The latter portion is a rare example in the state of a mail-order design from Palliser & Palliser. The house was listed on the National Register of Historic Places in 1996.

The Viola Coombs House is a historic house at 33 Main Street in Bowdoinham, Maine. Built about 1910, it is significant as an example of transitional Colonial Revival/Queen Anne architecture in a residential setting. It was added to the National Register of Historic Places in 1991.

The Robert P. Carr House is a historic house at 35 Main Street in Bowdoinham, Maine. It is a high quality area example of Italianate architecture, built about 1870 for one of the town's most prominent citizens of the period. The house was listed on the National Register of Historic Places in 1990.

The Cornish House is a historic house at 87 Main Street in Bowdoinham, Maine. Built in 1885, it is a distinctive late example of Italianate architecture, with gingerbread trim elements. It was listed on the National Register of Historic Places in 1980.

The Cathance Water Tower is a historic water tower at Cathance Road and Beechwood Drive in Topsham, Maine. Probably built in the late 19th century, it is an extremely rare surviving example of a residential wooden water tower built for a single residence. It was listed on the National Register of Historic Places in 2001. It is now owned by the town.

Merrymeeting Bay is a large freshwater tidal bay located in the U.S. state of Maine. Merrymeeting Bay's unusual geography defies common landform terms. It is not what is usually meant by the word bay. It is somewhat like an estuary but it has fresh water with very little salt. Geologically it is described as an "inland delta" and biologically as "tidal riverine."The head of Merrymeeting Bay is generally considered to begin at the southernmost point of Swan Island. Bordering towns and cities include Bath, Brunswick, Topsham, Bowdoinham, Dresden, and Woolwich. Public access to the bay is gained mainly from public docks on one of the contributing rivers in Brunswick, Bath, Richmond, and Bowdoinham.

The Abagadasset River is a 16 mile (25.7 km) long tributary of the Kennebec River entirely in Sagadahoc County, Maine. The river starts just south of Gardiner, and flows into Merrymeeting Bay.