Built on farmlands on the outskirts of the city, the Delta Sewage Disposal Works operated from 1934 – 1963. Converted to a centre for environmental education under the direction of philanthropist Norman Bloom, the main building re-opened in 1978, and the surrounding grounds became a public park. Together, the old water works structures form a fine group of municipal Art Deco Buildings, which include the spectacular central block, the main entrances and  the gate houses, staff houses and worker’s compound.