I went over to Collie today and dropped in at the Wellington Dam. This dam was built during the depression and in the 1960’s supplied water to places like Narrogin (I drank a lot of Wellington Dam water). However due to catchment clearing the dam became saline and unfit for drinking. A new dam (Harris Dam) has replaced the Wellington and this dam is mostly used for recreational purposes. I understand that there is a long term aim to reduce salinity in Wellington dam, but with all Western Australian dams showing declining yields this may never happen (ie by the time it happens there may not be enough water in the dam to make it worthwhile).
The water is being discharged from the dam to get rid of the most saline water. This is intended to reduce the overall salinity of the water in the dam and eventually return the dam as a potable source. Doesn’t seem likely after 40 years of trying.