I evaluated the tree primarily for assessment as a candidate for transplant, for sure, but one of the earlier reports specifically looked at retaining it in place. The determination of that arborist was that the remediation to the root zone would not likely ensure long-term survival of the tree.
I have similar concerns for its long-term survival. I think it probably will leaf out this spring, but, to me, the questions are, how much longer does it have and why do we think that?
The drought conditions that were experienced last summer are a really valid point in terms of that being the sole determination of the tree's health, but that wasn't entirely what I based my assessment on. When I looked at the tree in September, it had very poor foliage, but it was compared to the other tree and also compared to the different components within the tree that were of concern to me. The north half of it had really bad foliage and the south half had slightly better foliage. Based on my evaluation at the time, I concluded that the north half is possibly diseased.
It is also impacted by a really large cavity injury. A cavity isn't necessarily a bad thing in a tree. Very large trees can survive cavities with no problem. However, the location of this one was of concern to me. The fact that it was on the part of the stem that was showing diminished foliage was more conclusive to me in terms of the tree's general health, as opposed to just the tree having not very many leaves. It is sort of a question of being relative to itself.
In the long term, I think there will be more and more dieback on that tree. The decision has to be made about what value it is offering in terms of that, and I suppose at what point it is past the point of being worth saving.
It's difficult to determine exactly when a tree is dead. If a tree has one living branch on it and the rest of the tree is not alive, then technically it's still living.