When Rieth & Riley paved that section, they put a new guy on the concrete paver for a day. They had stout cord stretched between stakes every so many feet that was set to the grade for the paver to follow. Obviously, the cord would sag between the stakes, but the machine had a setting to adjust for the sag. However, the new operator didn't know about it and didn't turn it on, thus, the machine followed the sagging cord for around a mile before the regular operator was back on the machine.
When the DOT saw the dips, they wanted R & R to tear up the whole mile and replace it, but R & R talked them into letting them mill it down to remove most of the unevenness. It helped, but it is still very noticeable, especially in a big truck. I believe that it was milled again a few years back, but it's still like a roller coaster.