 As such, we still anticipate to have a declining enrollment exemption in our revenue limit calculation. The final budget will be presented to the school board in October. A group of nurses at Essentia Health in Superior is joining a union. Raymond Newpert reports. 19 employees at Essentia Health St. Mary's have filed notice with the National Labor Relations Board that they'll be taking a union vote. That follows unionizations at other hospitals in the Duluth-Superior area. The nurses would join the Minnesota Nurses Association.