If I could vote - this would be an 8 or 9 -- really like the symetry (I'm sure you heard from others the "don't put stuff in the middle" rule but.... it works here)
This would be an interesting shot to play around with angles and perspectives. The way you did this shot is the typical angle used. Next time try puttting the camera closer to the ground (below the level of the rails). You'll get a totally different feel. This might not have worked for this challeng though as it would take emphasis away from the water. Nice tones here. The bridge almost looks like it was oversharpened a touch though.
TC
This is a very pretty shot, that was my first thought, the mirror like calmness of the water was captured very well, I also like the way you captured the bridge with the aperature high so as to focus on the length of the bridge, this is a very good shot, 9