Johnston's Sawmill Steam Plant

Johnston's Sawmill Steam Plant in Mount Molloy is a collection of early 20th-century steam machinery remnants standing at the intersection of Santowski Crescent and Peninsular Development Road. The site includes a brick-encased Stirling water tube boiler, a Marshall steam engine, and a Walkers steam winch.

The plant was built in 1914 and operated until 1963, supporting local timber production. It emerged during a time when the region was recovering from copper mining decline and needed employment in new industries.

The machinery reflects how workers in this region relied on steam power for daily labor. It stands as evidence of how vital timber processing was to the local community.

The site sits on elevated ground at the corner of Santowski Crescent and Peninsular Development Road, making it easy to spot from the street. The location is openly accessible and requires no special preparations to explore the machinery from the outside.

The Stirling water-tube boiler and Marshall steam engine are among the last surviving examples of such machinery in Queensland. This equipment was typical for many sawmills that once operated across the region, yet few other sites preserve their original installed machines.