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ClapAlongChorus t1_j13sxwr wrote

Reply to comment by Obiwan_Salami in When this bridge in Fort Benton, Montana, USA was built 1888 it was required to have a swing span to allow steamboats to navigate. It was considered the furthest navigable point on Earth, more than 2,700 miles from the Gulf of Mexico. by triviafrenzy

correct, entirely possible because the ship and sanitary canal connect the two seperate watersheds in 1900. Before that, there was not a navigable connection between the chicago and the des plaines.

edit: actually the calumet canal connects the south branch to the des plaines river, I think, but I know less about it, other

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