What is the longest unbridged river in the world?

dippo

The Amazon River had no bridges until one was built at Manaus in 2011. It is still 1500 km from Manaus to the river mouth, with no bridges in that length. http://en.wikipedia.org/wiki/Amazon_River Apr 27 12, 3:44 PM

gmackematix

I think I'm ready to go with that mighty flow, Dippo. Although there are many rivers to cross by bridge, surprisingly the second longest appears not to be one of them. The 2011 bridge at Manaus crosses the Rio Negro, which is a major Amazon tributary and is therefore part of the Amazon system but is not generally regarded as part of the main river itself which seems to remain uncrossed so far despite a number of plans to do so. http://www.journeylatinamerica.co.uk/papagaio/Blog/Papagaio/July-2010/Bridges-over-the-Amazon.aspx Apr 27 12, 5:20 PM

queproblema

There's a good reason for that. I lived along a tributary of the Amazon for a good long while. Now I live relatively near a once-proposed "Bridge to Nowhere." And that's the reason there's no bridge over the Amazon--there are no major roads near it. http://www.foxnews.com/scitech/2012/03/22/virtual-tour-through-amazon-jungle-thanks-to-google/ http://en.wikipedia.org/wiki/Gravina_Island_Bridge Apr 28 12, 2:01 AM