Mount Hope Bay

Mount Hope Bay is a tidal estuary located at the mouth of the Taunton River on the Massachusetts and Rhode Island border. It is an arm of Narragansett Bay. The bay is named after Mount Hope, a small hill located on its western shore in what is now Bristol, Rhode Island. It flows into the East Passage of Narragansett Bay and also the Sakonnet River. Mount Hope Bay has played an important role to the history of the area, from pre-colonial times to the present. While many years of sewage and industrial pollution have severely degraded the quality of the shallow waters of the bay, there are currently major efforts underway to clean up and restore it.

Mount Hope Bay is part of the Narragansett Basin, formed as a rift in the Avalon terrane. It is underlaid by sedimentary rocks estimated to be several miles thick. The bay covers an area of about 13 square miles (36 square km), with an average depth of 18.7 feet, although portions of the southern end of the bay are as deep as 74 feet near the Mount Hope Bridge.

At the north end of the bay are the towns of Warren, Rhode Island, Swansea, Massachusetts, and Somerset, Massachusetts. The eastern shore of the bay consists of the city of Fall River, Massachusetts and the town of Tiverton, Rhode Island. Portsmouth, Rhode Island is located at the southern end of the bay at the northern tip of Aquidneck Island. Bristol, Rhode Island forms the western shore of the bay.

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