You have done a very good job of blending all the different components together and nice work on the perspective.

The only thing I might suggest is that the large helicopter in the foreground is a bit blurry in Hi res ... if you cannot get a sharper image of a helicopter you could make this work if the "bridge" was equally as blurred on the same horizontal plane as the heli ... sort of like this image here http://www.flickr.com/photos/dalemoorephotography/4191542938/ ... that also might help draw the eye into the image more.

Nice use of the source image!

@arca Thanks for the appreciations and useful suggestion. I understand what you want to say. I edited it.
@pixelkid Thanks you.

Love the image overall but why are there shadows on the beams?