Phyllis Graber Jensen Published on February 24, 2021 During spring and summer 2019, as crews excavated for the foundation of the new Bonney Science Center, they removed a stunning amount of ancient blue-gray marine clay — more than 10,000 cubic yards, according to an estimate from subcontractor Gendron & Gendron. We watched captivated as excavating machines scooped and scraped the clay, all clingy, sculptural, and glistening like unappetizing Jell-O. For weeks on end, a procession of G&G dump trucks arrived empty at the Campus Avenue site, across from Carnegie Science, and drove away full of clay. We found it remarkable, but for G&G, as for earthwork contractors in much of Maine, it was no big whoop.