Morning Fog at Saquatucket

I've been trying different approaches in painting fog. This is a typical morning scene here on Cape Cod. The fog is there and burns off. These are structures with certain dimensions so have to be shown in different values. The distant ones can have soft or disappearing edges but it is unlike painting fog in a valley or mountain. I experimented with cobalt blue and white acrylic as a wash but it still had an opaqueness. I used cobalt blue over the painting of this one. I did several washes. I had to be patient with drying since in previous trials the wash brushed away some of the painting.