This adds a new building that provides you +2 food per grain, and is a bridge over a river. Namely you build this on a river tile and it builds a bridge for your city to build on either side of the river.
The river bridge can be built whenever you reach a river from your city (similar to my snaking mod). It is seperate from the snaking mod for piers and lumbercamps. So you can play the original concept with no snaking for piers and lumbcamps and play with this mod that allows for snaking across rivers.
Just unzip the file into your ..\documents\my games\fallen enchantress\mods\ folder.
If you would like to see an alternate version of this where snaking is not allowed. Namely you have to build it next to your city center, let me know and I'll make an alternate version.
Enjoy. Updated with new icons, the icons aren't great but they should work.
https://dl.dropbox.com/u/75549875/Fallen%20Enchantress/RiverBridge/RiverBridgev2_4.zip