Was there a third bridge here between '42 and '82 or just the ferry?
Until 1984, a ferry ran from Panther Bay to Henderson over Lake Norfork. Here's a historic postcard:
http://www.flickr.com/photos/boston_public_library/748969101...
Now, there was a ferry that operated across the Norfork River in this general area until 1934, when a span was built across it. However, by 1943 the area was inundated from the waters filling Norfork Lake, rendering the span not only useless but submerged. Today THAT bridge lies 80 feet below the surface.
The Encyclopedia of Arkansas has an image of the old bridge as the lake inundated...
http://www.encyclopediaofarkansas.net/encyclopedia/media-det...
Not trying to troll here, but other then length, does this bridge have any particular significance?
Just the ferry.