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Grand Trunk Tunnel Under St. Clair River, Port Huron, Mich., To Sarnia, Canada. |
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Motors Entering St. Clair Tunnel, Port Huron, Mich. |
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St. Clair Tunnel |
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St. Clair Tunnel, Port Huron, Mich. |
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St. Clair Tunnel, Port Huron, Mich. |
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St. Clair Tunnel, Sarnia, Canada. The Longest Submarine Tunnel In The World |