The Arsenal Street Bridge is a bridge

Bridge

A bridge is a structure built to span physical obstacles such as a body of water, valley, or road, for the purpose of providing passage over the obstacle...

 connecting Arsenal Street in Watertown, Massachusetts

Watertown, Massachusetts

The Town of Watertown is a city in Middlesex County, Massachusetts, United States. The population was 31,915 at the 2010 census.- History :Archeological evidence suggests that Watertown was inhabited for thousands of years before the arrival of settlers from England...

 to Western Avenue in Allston

Allston, Boston, Massachusetts

Allston is a neighborhood of Boston, Massachusetts, located in the western part of the city. It was named after the American painter and poet Washington Allston. It comprises the land covered by the zip code 02134. For the most part, Allston is administered collectively with the adjacent...

, Boston, Massachusetts. It was built in 1925 by the Commonwealth of Massachusetts Metropolitan District Commission.

The bridge and street are named for the nearby Watertown Arsenal

Watertown Arsenal

The Watertown Arsenal was a major American arsenal located on the northern shore of the Charles River in Watertown, Massachusetts. Its site is now registered on the ASCE's List of Historic Civil Engineering Landmarks and on the U.S.'s National Register of Historic Places, and it is home to the...

. Western Avenue later crosses the Charles River again into Cambridge, Massachusetts

Cambridge, Massachusetts

Cambridge is a city in Middlesex County, Massachusetts, United States, in the Greater Boston area. It was named in honor of the University of Cambridge in England, an important center of the Puritan theology embraced by the town's founders. Cambridge is home to two of the world's most prominent...

 over the Western Avenue Bridge

Western Avenue Bridge

The Western Avenue Bridge is a bridge carrying Western Avenue over the Charles River between Cambridge, MA and Allston, Boston, MA. It was built in 1924 by the Commonwealth of Massachusetts Metropolitan District Commission....

.