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peteroh9 t1_j141juq 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

Doesn't matter if it's navigable if you couldn't get to it from the Illinois river. It originally flowed into Lake Michigan because it wasn't connected to the Illinois River.

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