Well they've dug a down a few metres across most of the Eastern tower site with the first pile driver now setting up on site.
Courtesy of Surrealplaces in the global section:
Place 10: 524 10th Ave SW, 612,000 Square Feet for both buildings
Place 10 by
Calgary Renders, on Flickr
http://www.cbre.ca/o/calgary/Pages/for-lease-office.aspx

[/QUOTE]