A suggestion... try rotating it 2.5° CW and then look at it. I did and I think things are properly aligned that way. Watch out in the future... we seem to be creatures of habit. Keep the alignment lines showing and pay heed to them... if you can! The habit comes in that (if she needs a rotation) my wife tends to need a CW rotation in her pics and if I am not paying attention to the alignment lines, I tend to need a CCW rotation. :o)
Thanks for your feedback. I appreciate it. The shot is level but the bridge is sloping from higher ground. That is probably what you are feeling. It does give that sense. Rotation, I believe, would throw the mill building off by straightening out the bridge.