The Broken Creek diverges from the Broken River downstream of Benalla and flows to the River Murray near Barmah Forest. The creek is located on a flat riverine plain and has naturally low run-off from its local catchment. It also receives flood flows from the Broken River, although these are much less frequent than occurred naturally due to earthworks and road construction.
Upper Broken Creek is the section of creek from Caseys Weir to Katamatite which extends about 65 kilometres. The creek has been used for water supply from the Broken River for more than 100 years, although irrigation entitlements have been significantly reduced (by more than 80 percent) as part of water savings projects in the last ten years. There are now low flows all year round at the top of the creek (Caseys Weir to Waggarandal Weir) as water can only be supplied from Broken River based on orders from customers in the creek. In the lower reaches (Waggarandal Weir to Reillys Weir and Reillys Weir to Katamatite), the system is most influenced by rainfall and catchment run-off which provides infrequent flow variability. Diverting water from the Broken River to the top reach may achieve some environmental objectives.