Houghton, Michigan

Houghton-Hancock Bridge (Houghton County, Michigan)
Built 1960 by the American Bridge Division of the U.S. Steel Co.
Vertical lift bridge over Portage Lake on US 41 between Houghton and Hancock
Open to traffic

Pilgrim River Bridge (Houghton County, Michigan)
Built 1916; rehabilitated 1942
Concrete arch bridge over Pilgrim River on US 41 in Houghton
Open to traffic

Portage Lake Swing Bridge (Houghton County, Michigan)
Replaced in 1960
Through truss bridge over Portage River
Replaced by a new bridge

Portage Lake Swing Bridge (Old) (Houghton County, Michigan)
Built 1891; Struck by the Northern Wave in 1905; Replaced 1906
Lost Pratt through truss bridge over Portage Lake on Road
Destroyed by collision

Portage Lake Swing Bridge (Older) (Houghton County, Michigan)
Built 1875; Replaced 1891
Lost Howe deck truss bridge over Portage Lake on Road
Replaced by a new bridge