Sault Ste. Marie International Railroad Bridge

Not to be confused with Sault Ste. Marie International Bridge.

Sault Ste. Marie International Railroad Bridge
The Railroad Bridge runs parallel to the highway bridge, and is the bridge on the left in the image.
Coordinates	46°30′27″N 84°21′43″W
Carries	CN Manistique Subdivision
Crosses	St. Marys River
Locale	Sault Ste. Marie, Michigan and Sault Ste. Marie, Ontario
Maintained by	Canadian National Railway
Characteristics
Design	Plate girder bridges Camelback truss bridge Double-leaf bascule bridge Vertical-lift bridge Swing bridge
Material	Steel
Total length	5,580 feet (1,700 m)
Width	21 feet (6.4 m) to 23 feet (7.0 m)
Longest span	369 feet (112 m)
No. of spans	9 (truss bridge)
History
Designer	Strauss Bascule Bridge Company (bascule)
Constructed by	Dominion Bridge Company (truss) Pennsylvania Steel Company (bascule)
Construction end	1887 (truss) 1895 (swing) 1915 (bascule) 1960 (lift)
Location

The Sault Ste. Marie Railroad Bridge was originally built in 1887 to facilitate rail traffic crossing St. Marys River and the international border between Sault Ste. Marie, Michigan and Sault Ste. Marie, Ontario. It runs parallel to the Sault Ste. Marie International Bridge.

Geograpy

The bridge carries the CN Manistique Subdivision over the St. Mary's River, which includes the Soo Locks Canals in Michigan, the St. Mary's Falls in Michigan & Ontario, the Sault Ste. Marie Canal in Ontario, and finally the remainder of the river in Ontario.

Description

It consists, from south to north, of a small plate girder bridge overpass, which spans West Pier Drive, a lift bridge, a bascule bridge, a nine-span thru-truss bridge, a swing bridge, and finally another plate girder bridge. The earliest part of the bridge where the thru-truss spans, which were completed in 1887. As the Soo Locks were enlarged for larger ships, some of the thru-truss spans were removed and replaced by lift, bascular and swing bridges.

Gallery

• 
  Shot of the rail bridge in 1905, showing the 10 original Warren truss spans. The highway bridge has not yet been built.
• 
  The swing bridge portion is shown, retracted to allow the passage of ships in the canal. The other bridge is the highway bridge for vehicle traffic.

See also

• Buffalo and Fort Erie Public Bridge Authority – public, Peace Bridge
• Detroit International Bridge Company – private, Ambassador Bridge
• Niagara Falls Bridge Commission – public, Lewiston-Queenston Bridge, Whirlpool Rapids Bridge and Rainbow Bridge
• Thousand Islands Bridge Authority – public, Thousand Islands Bridge
• Windsor-Detroit Bridge Authority – public, Gordie Howe International Bridge
• List of international bridges in North America

External links

• Historic American Engineering Record (HAER) No. MI-324, "Sault Ste. Marie International Railroad Bridge, Spanning Soo Locks at St. Marys Falls Canal, Sault Ste. Marie, Chippewa County, MI", 32 photos, 29 data pages, 5 photo caption pages
• Historic Bridges Org, Sault Ste. Marie Railroad Bridge, photos, maps and links