The Opus Group has started construction on a 61,750-square-foot Health and Natural Sciences building at Northwestern College in Orange City. The building will be the new home of the school's biology, chemistry and nursing departments. Among the building's many unique features is a cooling system that makes ice overnight, when utility rates are lower, and uses the ice to cool the building during the day. The building is scheduled for completion in summer 2018. Opus Design Build LLC is the construction manager for the project, HGA is the design architect and Cannon Moss Brygger Architects is the architect of record. Opus recently finished Geoffroy Hall at Iowa State University and has completed several projects at Luther College in Decorah, including the Sampson-Hoffland Science Center.