Over the last three years, I have made more than 500 visits to a new dam project, located 15 km west of Calgary. New findings resulting from fieldwork on terrestrial deposits of the uppermost Cretaceous include a marine incursion, two new regional lowstand events, a new structural interpretation supported by some stunning drone data, and fossils ranging from dinosaurs to invertebrates to a new family of fossil plants. All this plus a bed of giant oncoids flagging up the K/Pg boundary, with everything underpinned by classic sedimentology. The project showcases Alberta’s Historical Resources Act in action on a major construction project.