Based on the size of the digging equipment and the buckets, and the neat rectangular saw cut in the concrete and asphalt, this looks like a very targeted dig at this point, and not the "big dig" for which we're all waiting. Not that we won't be seeing that soon. But one of you intrepid forum photographers ought to ask one of those D'Angelo guys what they're doing the next time you're over there taking photos (especially since they're working right by the sidewalk). I suspect that, as Lincolndrive indicated yesterday, this may be some preliminary site work before the formal groundbreaking and digging in earnest get underway in July.
But hey, we'll take it!