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Bridges and Tunnels

A Comprehensive Record of Engineering Landmarks

Att. Tag: Polk Gap Tunnel

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Bridges (116) Dam (4) Ferries (1) Highways (6) Tunnels (14) Uncategorized (16)

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abandoned (24) bridge (108) collapse (1) Colorado (1) construction (8) covered (2) dam (4) Demolition (6) ferry (1) Highway (6) Illinois (2) Indiana (19) Kentucky (35) Maryland (2) Michigan (4) Mississippi River (1) Missouri (1) Monongahela River (1) New York (5) Ohio (32) Ohio River (7) Oklahoma (2) Ontario (2) Pennsylvania (6) railroad (3) Rehabilitation (3) Road (1) suspension (1) tunnel (12) Virginia (7) West Virginia (30)

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