Sydney
19.19 Decrease of other urban claims on water

The volume for the line item is 1,692 ML.

This line item reflects the unused portion of the allocation/claim associated with Delta Electricity's industrial and commercial entitlement (23,000 ML) on the Coxs River. The calculation for this line item is shown in the following table.

Calculation of other urban claims on water

Calculation	Line item	Volume (ML)
	11.20 Increase of other urban claims on water	23,000
less	11.14 Other delivery of water to the urban system	21,308
less	3.9 Other urban claims on water – closing balance	0
equals	19.19 Decrease of other urban claims on water	1,692

Entitlement information from: Draft Water Sharing Plan – Greater Metropolitan Unregulated River Water Sources; Delta Electricity Water Management Licence. Metered data for diversions are from reservoirs from Delta Electricity data spreadsheets.

Bureau of Meteorology: calculated adjustment and forfeiture of allocation/claim; NSW Office of Water: entitlement information; Delta Electricity: metered data for diversions from reservoirs.

Forfeiture of allocation for the regulated entitlement category is the difference between announced allocation, carry-over and measured diversions from the reservoirs.

Line item 11.20 provides the calculation method for volumetric value for the announced allocation/claim from regulated flows for the industrial and commercial holder category.

Ultrasonic flow meters were used to measure diversions from Lake Lyell, Lake Wallace and Thomsons Creek Reservoir to the Mt Piper and Wallerawang power stations.

For volumetric value for the announced allocation/claim see 'Approximations, assumptions, caveats/limitations' in line item 11.20.

For measured diversions: nil.

For carry-over volume see 'Approximations, assumptions, caveats/limitations' in line item 3.9.

Adjustment and forfeiture of allocation/claim was estimated. Uncertainty was not quantified.

The following table compares the value at 30 June 2010 reported in this account with the corresponding value reported in the 2010 Account.

 

Comparative year information from the 2010 Account for line item 19.19

2011 Account line item	2010 Account line item	Value reported in the 2010 Account (ML)	Value reported in the 2011 Account (ML)	Additional information
19.19 Decrease of other urban claims on water	24.12 Non-physical water distribution system decreases – other lumped	2,224 ML	2,179 ML	Prior period error: The volume stated in the 2010 Account for Delta's forfeiture on their urban water claim included Delta Electricity's and Lithgow City Council's carry-over volume under the Fish River Water Supply Scheme (FRWSS). The FRWSS carry-over and forfeiture has been accounted for in line item 19.14.