In Cumberland County, the Maurice River flows. It flows through farmlands, forests, and suburbs, ultimately emptying into the Delaware Bay. In 1983, a wastewater lagoon at a pesticide plant near the river collapsed, transporting tons of arsenic and killing the vegetation and wildlife in its path. The investigation into this event led to a closer look at the remnant footprints of industry and area development. The re-routing, excavation, dam construction is a compelling story and a starting point for discussion on what can be learned from this type of incident.