bcsimms04 t1_j16rknb wrote
Reply to comment by OHoSPARTACUS 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
Up in Colorado it is. But in the last few hundred miles in Arizona past the grand canyon it is a normal lazy flowing river
https://en.wikipedia.org/wiki/Steamboats_of_the_Colorado_River?wprov=sfla1
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