Around 1904, a three-story addition was made to the facility adjoining and to the north of the original central structure. It contained a dining room, two wards and bath facilities. This brought the facility to a "comfortable" capacity of around 600 with a daily average number of patients at 611 for the year ending June 30, 1908. Electric lighting replaced gas and kerosene light in 1906. Before 1927 a new power plant was added along with a nurses' home, a laundry facility and shops. A 50-bed building was also added for male patients. Closer to 1927, a 65 car garage was added as were new greenhouses, farm buildings and other out buildings.