Here's a portion of the site (my original zip file of contours was over 11MB). I stripped out everything but the contour plines. Their Z elevation is set to 0.
Have fun with it!
And upon further review, I need to change my estimated time of completion to about 2+/- hours. There are more of those little contours just floating out there than I had originally thought. So if I had to do this the LDT way, it would easily take me about 10 hours to assign the contour elevations.
*edit* removed attachment