Great shot with excellent leading lines that take you right into the shot and I agree with everything said above and would even suggest going perhaps a full stop darker at the bottom half of the shot, then graduate and feather it in so you don't really notice.
Last little nitpick for me, would be to lower the tones of the brightest areas of the sky, again by about a stop. For me it looks so bright against the rest of the shot, that it draws my eye towards it and doesn't seem to want to let go.
But then these are little nitpicks and the shot is good as it is, but with a tweak or two, it could be really, really good.
Dave