On 23 August 1978, Premier Neville Wran announced that the decrepit Ultimo Power Station, several hundred metres north of the Harris Street site had been earmarked as the museum's new permanent home along with the adjoining former Ultimo Tram Depot. The museum spent an interim period exhibiting as the "Powerhouse Museum – Stage One" in the nearby tram sheds before re-opening as the "Powerhouse Museum" at the new site on 10 March 1988. The main museum building contains five levels, three courtyards and a cafeteria, as well as some offices. Workshops, library, storage and additional office space is located in the annexed tram sheds (still known in-house as "Stage One"). The size and continually expanding nature of the museum's collection means that offsite storage facilities are also maintained.