The reaches of the Murrumbidgee in the Australian Capital Territory (ACT) are affected by the complete elimination of large spring snow melt flows and a reduction of average annual flows of almost 50%, due to Tantangara Dam. Tantangara Dam was completed in 1960 on the headwaters of Murrumbidgee River and diverts approximately 99% of the river's flow at that point into Lake Eucumbene. This has extremely serious effects on native fish populations and other native aquatic life and has led to serious siltation, stream contraction, fish habitat loss and other problems. The Murrumbidgee where it enters the ACT is effectively half the river it used to be.