Harlin Rail Bridge, Railway bridge in Queensland, Australia

The Harlin Rail Bridge is a railway crossing over Ivory Creek in Queensland featuring a half-through Pratt truss structural system. The design allowed trains to carry freight across the waterway as part of a regional transport network through the Brisbane Valley.

Built by Queensland Railways between 1909 and 1910, the bridge stood 61 miles 20 chains (98.6 km) from Wulkuraka on the Brisbane Valley Branch Line. That line was meant to meet the Gympie–Nanango line as a shorter route between the South Burnett and Brisbane, but the linking section was never built. The bridge was destroyed in 2013 by flooding linked to Cyclone Oswald.

The bridge earned recognition on the Queensland Heritage Register in 2008 for its representation of early twentieth-century railway engineering in Australia.

The bridge no longer stands: it was destroyed in 2013 by flooding linked to Cyclone Oswald, so only ruins remain at the Ivory Creek crossing, 61 miles 20 chains (98.6 km) from Wulkuraka station on the former Brisbane Valley line. Treat the site as unstable ground and check access before visiting.

The bridge stood 61 miles 20 chains (98.6 km) from Wulkuraka station on the Brisbane Valley line, and was the line's only surviving concrete and steel railway bridge. It was a half-through Pratt truss, also called a pony truss, built in 1909–1910. Floodwaters from Cyclone Oswald destroyed it in 2013; only ruins remain in Ivory Creek, formerly Maronghi Creek.