Helensburgh NSW 2508
Helensburgh Mine
Last updated 7 July 2026
The wealth of Helensburgh is in its black diamonds
The Metropolitan Colliery — more commonly known as the Helensburgh Mine — is literally the rock upon which the town of Helensburgh was built. When coal was discovered here in 1883–84, the mining town quickly sprang up around it. The mine officially opened in 1888 and is widely regarded as Australia's oldest continuously operating coal mine.
Current operations (2026)
Metropolitan Colliery is owned and operated by Peabody Energy. A proposed sale to South32 in 2016–17 was blocked by the ACCC and did not proceed — Peabody continues to operate the mine.
Operations at a glance
Metropolitan is one of the Illawarra's major producers of coking coal for Australian and export steelmakers. Coal is railed to Port Kembla for export. Hard to believe that coal mined in this small bush town ends up in products shipped around the world.
Contact: Community complaints 1800 115 003 · Mine office (02) 4294 7200 ·
History and the town
For many years miners and their families made up the bulk of Helensburgh's population — evidence still visible in the small miners' cottages throughout town. The mine kept Helensburgh thriving while neighbouring communities like Lilyvale and Cawley dwindled or disappeared entirely.
Helensburgh has its roots in the hard-working classes and takes pride in that humble history. The Depression of the 1930s hit hard as coal demand fell. Construction of the Woronora Dam brought workers back; post-war reconstruction and a migrant population boom in the 1950s–60s transformed the town. By the 1970s–80s, Sydney's suburban sprawl reached Helensburgh and the town was no longer solely dependent on the mine — though it remains the area's largest employer.
Inside the mine
The entrance to the colliery grounds is on Parkes Street. The mine itself is hidden in the valley amid the Royal National Park. The main workings are approximately 500 metres below ground. Workers descend by high-speed lift, then travel by rail through century-old tunnels — current longwall operations are roughly 5 km from the surface, about 30 minutes by engine.
There are hundreds of tunnels honeycombing the earth beneath Helensburgh — a giant, pitch-dark maze. Safety is paramount: helmets with battery-powered lamps, self-rescuers, gas monitoring and strict protocols throughout.
Mining machinery can extract up to fifteen tonnes of coal in approximately thirty seconds from a high-grade seam. It is hard, noisy and demanding work.
Environment and community
Metropolitan Colliery operates beneath the Woronora Dam catchment — a sensitive area that has been the subject of community concern and parliamentary debate. In 2022, a coal sludge discharge into a creek flowing toward the Royal National Park attracted significant media attention and EPA scrutiny.
Peabody publishes approvals, plans and real-time monitoring data on its Metropolitan Mine page. Community members with concerns should use the community hotline above.