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Big Al

Colonel By, built a dam at Jones Falls, in the 1830s, it was the first semicircular dam in NA, it is still standing and in use! Take a trip up to eastern Ontario and see the Rideau canal.

Elaine Meinel Supkis

Yes, some fine dams were built long ago. Note the Roman dam lasted 1,000 years! I love to visit canals. Have walked along several in the Eastern USA, the famous Erie canal begins right here in the Albany area! Some of the locks are still in use today.

The whole planet has seen many vast dam projects. They are all over the place. And the dangers grow with each one since not all are built as sturdy as say, the one at Jones Falls. Sturdy vis a vis the volume of water penned behind or geological reality demands.

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