The Glenlyon Dam is an earth- and rock-fill embankment dam across the Pike Creek, located roughly between and in south-east Queensland, near the border with New South Wales, in Australia. Completed in 1976, the dam wall was built on Pike Creek, a tributary of the Dumaresq River, upstream from the confluence of the Mole River and the Severn River branching from the Dumaresq. Its impoundment is known as Lake Glenlyon, and is also known as the Pike Creek Reservoir.
The dam wall is high, long, and holds back of water when at full capacity. The resultant reservoir, called either Lake Glenlyon or the Pike Creek Reservoir, has a surface area of , that draws from a catchment area of . Managed by SunWater, the Glenlyon Dam provides water for irrigation of grain and fodder crops and for the supply of water.
In December 1994, the dam reached a critically low level of 2.2% and the next year it rose to just 12% of capacity during a series of droughts in Australia. The dam reached a peak of 110.78% on January 12, 2011, during the 2010âÂÂ2011 Queensland floods.
Swimming, fishing, boating and water skiing are all permitted, with no restrictions on boating except near the dam wall. Two boat ramps facilitate access for boating. In the upper reaches of feeder creeks, there are large areas of standing timber and submerged logs.
The dam was stocked with golden perch, murray cod and silver perch while spangled perch, bony bream and eel-tailed catfish breed naturally. A Stocked Impoundment Permit is required to fish in the dam.