Emerald ash borer get to the tree?
Yeah, I think so. Pefectly healthy looking tree. I planted it 30 years ago. It was in the front yard and so I kept it up. But it was losing limbs and branches. Not even dead limbs. The leaves on a limb would still be green but ~ BAM! ~
A branch about 2 inches wide and some 15-20 feet long would just fall off. As you can see - I had a professional remove the tree AND the stump and roots. He said this is common for ash trees over 25 years old.