Sydney
19.14 Decrease of urban inter-region claim on water

The decrease of urban inter-region claim on water is 0 ML.

Water supply from the Fish River Water Supply Scheme (FRWSS) is based on water supply agreements between NSW State Water Corporation and its customers, including Lithgow City Council (LCC) and Delta Electricity. NSW State Water Corporation has a deemed water management licence for the FRWSS and operates it in collaboration with the Customer Council, of which LCC and Delta Electricity are members.

For the purpose of the 2011 Account, Delta Electricity and Lithgow City Council's allocation announcement on the FRWASS) was assumed to be 5,399 ML, equivalent to the volume diverted by Delta Electricity and Lithgow City Council under the FRWSS (5,183 ML see line item 11.9) plus the stated 2011 carry-over of 216 ML.

Therefore the volume forfeited at the end of the reporting year is equal to the allocation announcement (line item 11.15), minus the delivery (line item 11.9) and the 2011 carry-over volume (line item 3.4).

Delta Electricity and Lithgow City Council: data spreadsheets.

Delta Electricity and Lithgow City Council: delivery volumes. Bureau of Meteorology: calculated forfeiture volumes.

Volumes are calculated from annual allocation, carry-over volume and metered supply data. Metered supply data are based on flow measurements by NSW State Water Corporation using ABB Magflow meters. The calculation is shown in the following table.

Calculations of the urban inter-region claim on water

Calculation	Line item	Volume (ML)
	3.4 Urban inter-region claim on water – opening balance	0
add	11.15 Increase of inter-region claim on water by urban system	5,399
less	11.9 Delivery of water to urban water system under inter-region agreement	5,183
less	3.4 Urban inter-region claim on water – closing balance	216
equals	19.14 Decrease of urban inter-region claim on water	0

• Delta Electricity: nil.
• Lithgow City Council: nil.
  

The volume is based on measured data. Estimated uncertainty based on meter accuracy is +/– 2%. Meters are calibrated annually by ABB (meter supplier).

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

 

Comparative information from the 2010 Account for line item 19.14

2011 Account line item	2010 Account line item	Value reported in the 2010 Account (ML)	Value reported in the 2011 Account (ML)	Additional information
19.14 Decrease of urban inter-region claim on water	Not applicable	Not applicable	45	Line item classification: this line item was not reported in the the 2010 Account.