Double-Posting, to give a few updates.
1: Following the accident on Sunday, as of yesterday; a chain link fence has been set up on the top of the hill to catch for the sake of any potential debris (or if a accident happens again).
2: They have hit surface level for the lot, and it seems now they are beginning the process of extending the wall itself to be thick.
Additionally, it seems utility work is now underway on the surface lot, now that they can properly begin the process.