Cedar Grove Weir began storing water in December 2007
Cedar Grove Weir was constructed by the Water Infrastructure Solutions Alliance (WISA), which comprises QWI, Macmahon Contractors, SMEC Australia and Hydro Tasmania.
The Weir is an essential component of the Queensland Government’s strategy to ensure a safe and sustainable water supply for SEQ’s growing population. It is part of the Logan River system that also will include the Wyaralong Dam on the Teviot Brook and the Bromelton Offstream Storage facility.
The Weir is now complete, and began storing water in December 2007.
Cedar Grove Weir is providing additional water supplies to the local Beaudesert region and into the South East Queensland Water Grid, harvesting up to 3,000 ML/a from the Logan River.
When operating in conjunction with the Wyaralong Dam, a yield of 21,000 million litres per year will be extracted at the Weir to boost regional water supplies and supply into the planned Water Grid.
Cedar Grove Weir is located on Logan River, about five kilometres downstream of where it meets the Teviot Brook, 30 kilometres downstream of the existing Bromelton Weir and 10 kilometres upstream of South Maclean Weir.
The 102 metre steel sheet pile wall features a fishway to facilitate fish movement up and down stream. The Weir has been designed so that excess water flows over the top of the structure during high flow events. Even at full capacity, there will be minimal impact on land upstream of the Weir, as the increased water levels will be easily contained within the existing bed and banks of Teviot Brook and the Logan River.