In the Murray, Goulburn and Campaspe systems, entitlement holders are able to carryover a volume up to 100% of their high and low-reliability water shares.
This may mean that when seasonal determinations are greater than 0%, entitlement holders may have more than their total high and low reliability water share volume in a given season.
If this happens, then the volume above the high and low reliability water share volume is quarantined in a spillable water account and may be lost if the storage in those systems fills and spills.
The Resource Manager conducts an assessment about the chances of the storages spilling in these systems (i.e. Lake Hume, Lake Eildon and Lake Eppalock) on the 10th of each month. If the chance is less than 10%, a low risk of spill will be declared and the water in the spillable accounts is returned to the allocation accounts.
If there is a spill, the Resource Manager will deduct a proportion of all the spillable water accounts based on the volume that is spilled from the storage.