My guess is construction damage. I have seen this in many places especially new subdivisions 5 to 10 years after construction. The dying back of the crown from top to bottom is common with an array of things from root damage, drought, too much water, insects, disease, fungus, the list goes on and on. The trees around the lake are from high water, as you are well aware, but in stonebridge I would put money on construction damage without being able to look at the trees.