Not to bump this thread, but I just thought I'd throw in a piece of useless construction knowledge here.
Dirt mountain disappeared because they used most of it to backfill around the new basement of BatB, since it's new concrete basement walls are done. They were applying the waterproofing last week, and then they placed all the dirt back around them.
The rest (or at least whatever else they took from the pile to date) was used to backfill the excavations from new storm sewers and utility piping in the areas just beyond the construction walls.
For those who say the mountain of earth was WAY more than they needed to fill in around BatB, I will add that when soil is excavated (dug up), it expands. And it compresses even more when used as backfill. They place it in lifts (a few feet at a time) and compact it using rollers. Depending on the type of soil, it can reduce in apparent volume by 50%.
Whatever is left will be used to re-grade the area and bring it all up to FL elevation. They may even need to import soil when it's all said and done.