7/6/13: We think these are to support the back stairs. (That's our story and we're stickin' to it.)
7/6/13: Next up: back filling, damp proofing, and - I forget - stay tuned.
7/16/13: May not look like it, but there's been activity in the past week +. They built the drain system to remove water from around the foundation. The "interior" has been leveled in preparation for the installation of the structured wood floor (the materials for which have been delivered and were stacked near the front of the house).