Work at Apple's new sapphire production plant in Mesa, Arizona is progressing, with contractors working "around the clock and even on weekends", according to a new report by AppleInsider. It also says Apple may be expanding into another building already existing on the site.
The site says Apple planned to have the facility up and running by February and it may be partially active as work continues. It also published a series of images showing the exterior of the building, though they are not particularly revealing. The building was built by a solar panel manufacturer but never saw production.
Rumors floating around the local electrical industry in Arizona claim Apple may be mulling a project expansion into a building on the site that was previously owned by photovoltaic panel maker First Solar. The purpose of the support structure is unknown.
Apple originally announced the 700-employee manufacturing facility, in partnership with sapphire-maker GT Advanced, back in November. Tim Cook said in an interview that the facility would be making sapphire for a "secret project" with other reports saying the plant will see full production beginning in the second half of 2014.