Altamaha River Railroad Bridge
Trains passing through.
Photo taken by Douglas Butler
License: Creative Commons Attribution (CC BY)
BH Photo #267794
It was very likely built over the deep channel, but over time the river has changed it's course slightly and the part under the bridge has silted in. The river has meandered and left oxbow lakes that can be seen in the vicinity on satellite views, so it was probably a lot different 100 years ago.
According to the site the images are from, this bridge was built with a movable span so that the river would still be navigable by steamboats during times of high water.
Also worth noting as that those pictures were taken during October 2012, when Georgia, as well as most of the country was experiencing a drought.
Why would they build the moveable span over the shallow part of the river?
It's a shame there's no water under the bascule span... ;)
At the end of the Oscars "In Memoriam" segment you may have seen the name Sarah Jones. She was a camera assistant killed a couple of weeks ago during a shoot on this bridge.
http://www.hollywoodreporter.com/news/midnight-rider-acciden...
There's a good reason the railroads make it a point to keep people off their property. Be safe.