I'm no expert either but do buildings no longer require foundations, the drawings of the ski slope would be very near the ice pad if your photo shows the ice pad and judging by the height I would have expected to see something in the ground coming out of it, to me the site looks like a car park.
[imghttp://news.bbcimg.co.uk/media/images/67341000/jpg/_67341581_masterplan.jpg][/img]