“Essentia Health – St. Mary’s Medical Center, Duluth: Concrete the Ultimate Building Material”Concrete is a fundamental part of most buildings, and this project is no exception. With 42,000cy placed across two city blocks, 100’ of foundation elevation change and through 2 years of COVID-19; this project experienced the gambit of challenges when working with concrete. Come along the journey as we discuss 18ft thick walls, rock excavation impacts and building in Duluth on the shores of Lake Superior.