As feared, the recent replacement of the concrete cladding on the R.L. Clark Water Treatment Plant has removed the roof overhang that used to serve as a shelter for the Cliff Swallows' mud pellet nests. That colony has survived there for many years.
A visit yesterday indicated that some pairs are starting to build nests under any alternative overhang they can find (doorways, windows, lights ..). All in all, there look to be twelve nests under construction at this time.