rechlin t1_j144amm 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
But that point was closer to the ocean than Montana. The point here is this was the farthest point away from the end of a river that the river was still navigable.
Of course, this was in the 1800s. That part of the Missouri has not been navigable since the 1950s when the USACE built a set of flood-control dams on the Missouri.
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