VieFirionaVie t1_j153rgf wrote
Reply to comment by Treyred23 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
Aswan low dam, about 1000km/600mi. Maybe lower depending on the season
Viewing a single comment thread. View all comments