Port Huron, Michigan

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Black River Bascule Bridge (St. Clair County, Michigan)
Built 1933
Bascule bridge over Black River on 7th Street Erie Street in Port Huron
Open to traffic

Blue Water Bridge (St. Clair County, Michigan)
Built 1938; rehabilitated 1999
Through truss bridge over St. Clair River on Westbound I-94 in Port Huron
Open to traffic

Blue Water Bridge (St. Clair County, Michigan)
Built 1997
Steel through arch bridge over St Clair River on I-94 EB
Open to traffic

CN - Black River Bridge (St. Clair County, Michigan)
Built 1929
Pony/through plate girder bridge over Black River on Canadian National Railroad
Open to traffic

CN - St. Clair Tunnel (New) (St. Clair County, Michigan)
Built to replace old St.Clair Tunnel with improved clearances
Tunnel under St.Clair River on Canadian National Rwy
Open to traffic

CSX - Black River Bridge (St. Clair County, Michigan)
Built 1931
Warren through truss with all verticals bridge over Black River on Pere Marquette Railroad (abandoned)
Closed to all traffic; the yacht club that now owns the bridge proposed to demolish it as of December 2011; preservation group has offered to acquire lease it but club wants it moved off-site

Military Street Bascule Bridge (New) (St. Clair County, Michigan)
Built 1991
Deck girder bridge over Black River on Military Street (Business I-69 + I-94)
Open to traffic

Military Street Bascule Bridge (Old) (St. Clair County, Michigan)
Built 1912-13; Replaced 1991
Lost Bascule Bridge over Black River on I-94/I-69 Business Loop (ex-US 25, ex-M-25) in Port Huron
Replaced by new bridge

Military Street Bridge (Old) (St. Clair County, Michigan)
Built 1884; replaced 1914
Lost Pratt through truss bridge over Black River on Military Street
Demolished and replaced

Military Street Bridge (Older) (St. Clair County, Michigan)
Built 1857; Replaced 1884
Lost Howe through truss bridge over Black River on Military Street
Replaced by a new bridge

Pere Marquette - Black River Bridge (Old) (St. Clair County, Michigan)
Replaced 1930
Lost Through truss bridge over Black River on Pere Marquette Railroad
Demolished

St. Clair Tunnel (St. Clair County, Michigan)
Built 1888-1891; Electrified 1907-1908; Electrification removed 1958: Tube sealed 1994
Tunnel under St. Clair River on Canadian National Railroad in Port Huron
Closed to all traffic

Tenth Street Bridge - Replacement (St. Clair County, Michigan)
Built 1957
Bascule bridge over Black River on 10th Street in Port Huron
Open to traffic

Tenth Street Swing Bridge (St. Clair County, Michigan)
Replaced 1957
Lost Pratt through truss bridge over Black River on 10th Street
Replaced by a new bridge