Bottle Kiln mountain was central to the Commonwealth

was central to the Commonwealth Portland Cement Company's operations at Portland

interior dust hanging in the dim light

Robertson at New South Wales

debris scattered across the matting

Mt Kuring Gai Motel Mt Kuring Gai at New South Wales

Bottle Kiln mountain was central to the CommonwealthOne of two surviving brick bottle kilns at Portland Cement Works Precinct, standing approximately 14 metres high with steel clamping bands visible at regular intervals along the brickwork. These kilns date to around 1889, predating the Commonwealth Portland Cement Company works by over a decade. Part of the Portland Cement Works series.