Mystic River Drawbridge No. 7, Spanning Mystic River at Boston & Maine Railroad Eastern Route, Somerville, Middlesex County, MA
Summary
Significance: Drawbridge No. 7 is apparently the last horizontally folding railroad bridge in the eastern United States. Its technology is representative of the earliest patented movable span bridge in the country (patented by Joseph Ross of Ipswich, Massachusetts, in 1849). The horizontally folding draw was a common railroad bridge type in the Greater Boston area since the 1840s. All except Drawbridge No. 7 have been removed and/or replaced.
Survey number: HAER MA-88
Building/structure dates: 1894 Initial Construction
Building/structure dates: 1933 Subsequent Work
Building/structure dates: 1955 Subsequent Work
Building/structure dates: 1917 Subsequent Work
Tags
Date
1969 - 1980
Contributors
Historic American Engineering Record, creator
Ross, John
Ross, John, Jean, transmitter
Location
Somerville, 42.38760, -71.09950
Source
Library of Congress
Copyright info
No known restrictions on images made by the U.S. Government; images copied from other sources may be restricted. http://www.loc.gov/rr/print/res/114_habs.html