At the northern tip of the lake is (what else?) a Lake Club, which doesn't look terribly fancy, and offers nothing but tennis and canoeing, but membership is nonetheless effectively limited to succeeding generations of local families.
The symptoms usually develop slowly, and may not be noticed immediately. The leaves may become smaller and fewer in number. The crown of the tree often thins out. New terminal growth may be limited, and branches may die. Abnormally large seed crops are sometimes associated with decline, as is early fall color and leaf drop. Trees affected by decline may survive for many years, or may die within a few years.
That pretty much summarizes the condition of every single tree still clinging to life in New Jersey. The example above and, closer up, below is in the process of breaking apart, about 20 feet above the ground.
And the trunk will soon resemble the broken stubble depicted below, which has already lost it's top 2/3.