3.4 Urban inter-region claim on water
The Adelaide urban water system has an inter-region claim to River Murray Water. This claim is facilitated by a Class 6 water access entitlement to shares in the River Murray consumptive pool for South Australia. The entitlement is intended specifically for reticulated public water supply to metropolitan Adelaide. The Mannum–Adelaide, Murray Bridge–Onkaparinga and Swan Reach–Stockwell pipelines are used to transfer River Murray water under the entitlement.
The total value of the entitlement to River Murray Water is 130,000,000 shares. The water allocation rate can exceed one kilolitre per unit share because the entitlement is managed as a rolling total diversion of 650 gigalitres over five years. The Water Audit Monitoring Report – 2010–11 for the Murray–Darling Basin provides more detail on how this rolling total is managed and diversions under the entitlement for the past five years. The entitlement does not permit carryover of allocation volumes. Therefore, the volume reported was 0 ML for both the opening and closing balance. More details regarding the entitlement can be found in the Water Allocation Plan for the River Murray Prescribed Watercourse.
The opening and closing balance of the inter-region claim, increase of the inter-region claim due to allocation announcements, delivery of water under the inter-region claim and the decrease in the inter-region claim at the end of the 2010–11 year are provided in the following table. Links to these line items are also provided in the following table.
|Calculation||Line item||Volume (ML)|
|Opening balance||3.4 Urban inter-region claim on water||0|
|Closing balance||3.4 Urban inter-region claim on water||0|
This line item corresponds to line item 7.6 Non-physical water asset – other lumped reported in the 2010 Account. In the 2010 Account, the Class 6 water access entitlement for River Murray water was reported as an inter-region claim held by the Adelaide region's surface water store. However, in the 2011 Account the entitlement was reported as a claim held on behalf of the Adelaide region's urban water system. This change was made because River Murray water abstracted under the entitlement is transferred directly into the Adelaide urban water system (although there is some subsequent discharge to surface water). Thus, representing the entitlement as a claim held by the urban water system provides clearer information for the user. Despite reclassification of the River Murray entitlement, the volume reported did not change. The restated volume for the comparative year opening and closing balance is 0 ML.