BLACK R RIVER VALLS, Wis. – The structure of healthcare in Jackson County entered a new era with the new year but nobody might much notice. The Black River hospital and Krohn Clinic announced their formal merger. Each will retain its original name and identity – and still be straight across Adams Street from each other. Michelle Clark-Forsting, chief physician executive of the new entity, sad the merger will streamline articulation seamlessly between the hospital and clinic;