Husky Stadium

Since Lear isn't doing anymore of his "fantastic and in depth" posts on the renovation of Husky Stadium, I thought we could post a few notes, comments and observations here. I had a question about the lower bowl concrete. It seems like so long ago, but I thought they sealed the raw concrete of the upper deck on the west side? If so, why aren't they doing that to the lower bowl? Did I miss something? A different type of concrete perhaps?