Wyaralong Dam

The Wyaralong Dam is a mass concrete gravity dam with an un-gated spillway across the Teviot Brook that is located in the South East region of Queensland, Australia. The main purpose of the dam is for supply of potable water for the Scenic Rim region. The impounded reservoir is also called Wyaralong Dam. The dam was initiated by the Queensland Government in 2006 as a result of a prolonged drought which saw the catchment areas of South East Queensland's dams receive record low rain.Location and featuresThe dam is located approximately north-west of.The Wyaralong Dam was completed prior to the 2010–2011 Queensland floods. On January 11, during the flood period, the Mayors of both Logan City and Scenic Rim said they believed that Logan had been spared a great deal of flood damage because of the dam.The concrete dam structure is high and long. The dam wall is constructed from a medium cementitious mix roller compacted concrete. The foundation is a sub horizontal dipping blocky sandstone. The dam is built with a 130m wide uncontrolled central primary spillway and an uncontrolled left bank secondary spillway which commences discharging at the 1:100 year flood level. The dam cross section is rather squat in order to provide sufficient resistance against potential sliding along foundation bedding planes. The 218300e3m3 dam wall holds back the 103000ML reservoir when at full capacity. From a catchment area of that includes much of the western portion of the McPherson Range, the dam creates an unnamed reservoir with a surface area of 1230ha. Teviot Brook and the surrounding land is a recognised Aboriginal Pathway with significant cultural heritage values.