As two of the priorities of the 15-year plan, the Central Heating Plant was completed in 1921 and a City-funded but hospital-run isolation hospital building for patients with infectious diseases was completed on King Street opposite the new heating plant.
In 1922, Mrs. Alice Richardson, widow of Senator Henry W. Richardson, gave $100,000 towards the redevelopment fund for a building which would include suitable accommodation for the treatment of tuberculosis. The Richardson lab officially opened in 1925 and provided public wards, rooms for tubercular patients, four operating rooms, space for outpatients, x-ray, hydro and light therapy, the eye, ear, nose and throat department, dispensary, and electrocardiograph.