Displaying results 1 of 2 - 2
Date Innovation City State Country Society
1904 Peterborough Hydraulic (Canal) Lift Lock Peterborough ON Canada ASME
1891 St. Clair Tunnel Sarnia ON Canada ASCE
Displaying results 1 of 2 - 2

We hope you enjoyed this essay.

Please support this 70-year tradition of trusted historical writing and the volunteers that sustain it with a donation to American Heritage.

Donate

Help us save
Stay informed - subscribe to our newsletter.
The subscriber's email address.