Where else locally have you seen an approved design differ to such an extent upon project completion?
Not sure concept drawings and "approved design drawings" are the same thing?
Maybe I misunderstood, but were these bridge drawings the actual documents that were signed off on, intending to describe exactly how the bridge would look when completed?
I was under the impression they were conceptual drawings to describe the general intent of the final design.
The conceptual drawings I've had done up for specific projects downtown were merely intended to get discussion moving forward, and bring people on board ... and were in no way a commitment by anybody, or to anybody that what was shown in the drawings was an actual representation of any intended final product.
Indeed, in all but one case, the concept drawings were generated by an architect that had nothing to do with the actual finished design of the project.