Rocky Creek Dam, Embankment dam in Northern Rivers, Australia

Rocky Creek Dam is an embankment dam that creates a reservoir across Rocky Creek in the Northern Rivers region. The site includes picnic areas, restrooms, car parks, and an elevated boardwalk designed for watching local wildlife.

Rocky Creek Dam was built between 1949 and April 1953 by Dayal Singh under contract to Rous County Council, damming Rocky Creek about 25 km north of Lismore. In 2009 the wall was upgraded for maximum probable flood safety: the top was removed, a concrete cut-off wall was keyed into the clay core, and the gravel and road surface were replaced. After the reservoir fell below 20 per cent in 2003, an emergency Wilsons River source was completed that year, with the full source and Nightcap plant upgrade finished in 2008.

The reservoir is called Rocky Lake, and the catchment around it holds one of the largest remaining patches of Big Scrub subtropical rainforest, growing on basalt and rhyolite from the Tweed Volcano. The lawns beside the lake are often used for weddings, while the surrounding state forest and national park allow only walking and birdwatching.

Swimming, boating, 4WD and dirt bikes are prohibited on Rocky Lake and in the catchment to protect water quality; only passive recreation such as bushwalking and birdwatching is allowed. The recreation area by the dam wall has lawns, barbecues, playgrounds, a boardwalk and a pontoon bridge. The dam lies about 25 km north of Lismore.

The dam was built with approximately 80,000 tonnes of rock, soil, clay, and concrete combined into a single structure. This massive volume of material shows the scale of engineering work from that era.