Blue Rock Dam, Embankment dam near Moe, Victoria, Australia

Blue Rock Dam is an embankment dam on the Tanjil River in Victoria, forming a large reservoir used for both water supply and power generation. The dam wall stands 72 meters tall and runs about 600 meters across, holding back a body of water that covers roughly 873 hectares.

The Blue Rock Dam was completed in 1984 on the Tanjil River, about 30 km north of Moe, to supply cooling water to the Latrobe Valley thermal power stations and to augment domestic water supplies. It is operated by Southern Rural Water. In 1992 Pacific Energy added a 2.4-megawatt hydroelectric generator linked to the national grid.

The reservoir is a popular spot for fishing, with the Tanjil River feeding into it and offering good conditions for anglers. On weekends, families from nearby towns gather at the shoreline to picnic and spend time near the water.

The area around the reservoir has two separate recreation zones along the shoreline, each offering different activities such as walking trails and small motorboat access. Getting there early on weekends is a good idea, as parking can fill up quickly on fine days.

In 1992 Pacific Energy installed a 2.4-megawatt hydroelectric generator at the dam, linked to the national grid. It is a small addition to a structure built mainly to supply cooling water to Latrobe Valley power stations.