Displaying results 21 of 24 - 24
Date Innovation City State Country Society
1831 Borden Base Line South Deerfield MA USA ASCE
1834 Ascutney Mill Dam Windsor VT USA ASCE
1834 Allegheny Portage Railroad Duncansville PA USA ASCE
1832 Ackley Covered Bridge Dearborn MI USA
Displaying results 21 of 24 - 24

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