A matted and framed photograph of the isotope-separation towers of the Port Hawkesbury Heavy Water Plant (PHHWP). The Port Hawkesbury plant was built by Lummus Company of Canada Limited under contract to Canadian General Electric Company. Production of heavy water began in 1970 but the plant encountered numerous technical problems and was sold to AECL in 1975. Intermittent production continued until the plant was shut down and dismantled in 1985. The framed photograph, which measures 41 cm by 51 cm, was taken about 1980.
