I'll start with the vision, which is amazing. The texture of the two pillars is quite amazing. Vintage almost. The background really brings it out too, speaking of the background, the ground colors and early morning fog is just beautiful, and works amazing. So five stars for that.

This is also very original and I've never seen anything like it-The bridge under belly. The colors-I've seen before, and I've seen this kind of texture before, so I will only give you only 4 stars.

Your technique works amazingly, and it's been said before, but the perspective is magnificent. The frame around this is also amazing, because it leaves no empty spaces which in the case of this photo, is very good.

The impact on this is wonderful. It combines the darkness with the light (The sky and sun.) and certainly feels big, and empowering.

I'm impressed with the perspective you chose in this picture.
The crop and viewpoint did work to your advantage in this case.
To date, i've seen many bridge shots taken from the sideway, but never from directly below, and showing a more or less mirrored angle which reflects the composition you've taken on to .
The mist also adds to the mysterious effect along with the details brought out by your decision to create this in HDR. It does make it an overall well-done piece.

Still, not everything is flawless, and if we start going in as anal critiques to create the perfect shot, little details must also be noticed.

My eyes were constantly brought to the object slightly to the right of the left pillar which looks seemingly like a... boat? It was an immediate distraction unlike the trees in the vicinity. What I felt could have been done would be to step a back a little more, and let the pillar cover up that minor distraction.

A little more contrast would also right it as the minor overexposure in the background pushes the eye off slightly. As a HDR piece, be careful not to allow over exposures and underexposures to happen!

Lastly, for amusement, but still, some little anal detail that could be worked on as well. Just above the grass to the left of the picture, a piece of the background/or foreground, has cut into the borders of the crop and blends with that. It doesn't sit well to me, but then again, i'm being extremely anal where I shouldn't be. It might be great to crop it in a few pixels and that should solve it too. The overall lesson in this one as well is to watch out for jutting in objects in the frame that might ruin the picture for no apparent reason.

Still, a great picture to behold and one to be proud of for sure.