Your perspective here draws attention tothe massiveness of the bridge, which is nice. I'm not sure what function the mud in the foreground serves, however. It may be better to crop closer to the bridge, however interesting the mud. The most interesting light here is in the water and mud, too--I'd like to see it on the bridge.
Youve done all the right moves (foreground interest, getting a sense of scale, etc) but it still leaves me felling a bit "'so what"ish. I'd travel a bit to the right to get a better angle on the bridge, and also not have as much foreground. Also, a better time of day might have helped the light.
Nice angle. I like the first area of land in the foreground, but showing this area together with the second piece of land seems to detract from the image. I think it might be improved about a third of the bottom was cropped.
Nice shot - is this the Orwell Bridge in Suffolk? Certainly looks like it: I almost drove out to shoot it myself, if it is. Not sure the white balance works for the sky (and here is a lot of sky here). Good stuff.