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Decisions and Proposals

The ERA's decisions and the access arrangement proposals submitted by Western Power during this access arrangement assessment period are available here.

ERA Papers

Date Documents File type
26-Apr-07 further final decision Adobe PDF203 kB
02-Mar-07 final decision Adobe PDF 128 kB
21-Mar-06 draft decision Adobe PDF792 kB
16-Sep-05 Issues paper on Western Power's proposed Access Arrangement for its network in the SWIS Adobe PDF 717 kB
03-May-06
Public forum transcript - Draft decision on Western Power's proposed access arrangement Adobe PDF 72 kB
10-Mar-05 Discussion Paper - Ringfencing Rules to apply to Western Power's networks business Adobe PDF 480 kB
14-Jan-05 Discussion Paper - WACC methodology to apply to Western Power's network in the SWIS Adobe PDF 552 kB
01-Mar-07 Wilson Cook & Co's Supplementary Report on Western Power's Revised Proposed Access Arrangement Expenditures and Valuation Adobe PDF321 kB
17-Jan-07 Parsons Brinckerhoff Associates report on Contracted Capacity Rights Adobe PDF90 kB
16-Sep-05 Network Advisory Services report on service standards in the SWIS Adobe PDF646 kB
16-Sep-05 Talbot Olivier comparative table on Western Power's proposed applications and queuing policy Adobe PDF250 kB
16-Sep-05 Talbot Olivier comparative table on Western Power's proposed capital contributions policy Adobe PDF93 kB
16-Sep-05 Talbot Olivier comparative table on Western Power's proposed standard access contract Adobe PDF728 kB

Approved Access Arrangement

Date  Documents File type
02-Apr-07 Access Arrangement Covering letter Adobe PDF1,335 kB
02-Apr-07 Western Power's Amended Proposed Access Arrangement Adobe PDF124 kB
02-Apr-07 Western Power's submission (summary) Adobe PDF78 kB

Western Power's amended proposed Access Arrangement for its network in the South West Interconnected System

Date Documents File type
02-Apr-07 Appendix 1 - Applications and queuing policy
Adobe PDF196 kB
02-Apr-07 Appendix 2 - Transfer and relocation policy Adobe PDF112 kB
02-Apr-07 Appendix 3 - Capital contributions policy Adobe PDF67 kB
02-Apr-07 Appendix 4 - Standard access contract Adobe PDF231 kB
02-Apr-07 Appendix 5 - Price list Adobe PDF167 kB
02-Apr-07 Appendix 6 - Price list information Adobe PDF294 kB
02-Apr-07 Appendix 7 - Reference services Adobe PDF96 kB
02-Apr-07 Appendix 8 - Price control explanatory notes Adobe PDF66 kB

Amended Proposed Access Arrangement Information documentation

Date Documents File type
02-Apr-07 Amended Proposed Access Arrangement Information Adobe PDF860 kB
02-Apr-07 Appendix 1 - Meyrick Benchmarking opex and capex report Adobe PDF384 kB
02-Apr-07 Appendix 2 - Benchmark Economics report Vol 1 Adobe PDF1,111 kB
02-Apr-07 Appendix 2 - Benchmark Economics report Vol 2 Adobe PDF523 kB
02-Apr-07 Appendix 3 - KPMG WACC report Adobe PDF324 kB
02-Apr-07 Appendix 4 - SFG WACC report Adobe PDF115 kB
02-Apr-07 Appendix 5 - KPMG Cost of capital report Adobe PDF136 kB
02-Apr-07 Appendix 6 - Expenditures report Att A Adobe PDF111 kB
02-Apr-07 Appendix 6 - Expenditures report Adobe PDF823 kB
02-Apr-07 Appendix 7 - Code Compliance of AQP Adobe PDF137 kB
02-Apr-07 Appendix 8 - Code Compliance of CCP Adobe PDF97 kB
02-Apr-07 Appendix 9 - Code Compliance of SAC Adobe PDF102 kB
02-Apr-07 Appendix 10 - Asset Valuation Adobe PDF889 kB
02-Apr-07 Appendix 11 - Revenue Model Adobe PDF100 kB

Western Power's revised proposed Access Arrangement for its network in the South West Interconnected System

Date Documents File type
06-Oct-06 Western Power Revised Forecasts submission (Part A) Adobe PDF53 kB
06-Oct-06 Western Power Revised Forecasts submission (Part B) Adobe PDF70 kB
19-May-06 Access Arrangement Covering letter Adobe PDF42 kB
19-May-06 Western Power's submission (Part A) Adobe PDF230 kB
19-May-06 Western Power's submission (Part B) Adobe PDF489 kB
19-May-06 Western Power's submission (Part B summary) Adobe PDF289 kB
19-May-06 Revised Proposed Access Arrangement Adobe PDF361 kB
19-May-06 Appendix 1 - Applications and queuing policy Adobe PDF330 kB
19-May-06 Appendix 2 - Transfer and relocation policy Adobe PDF98 kB
19-May-06 Appendix 3 - Capital contributions policy Adobe PDF129 kB
19-May-06 Appendix 4 - Standard access contract Adobe PDF443 kB
19-May-06 Appendix 5 - Price list Adobe PDF192 kB
19-May-06 Appendix 6 - Price list information Adobe PDF566 kB
19-May-06 Appendix 7 - Reference services Adobe PDF143 kB
19-May-06 Appendix 8 - Price control explanatory notes Adobe PDF87 kB

Revised Proposed Access Arrangement Information documentation

Date Documents File type
19-May-06 Revised Proposed Access Arrangement Information Adobe PDF930 kB
19-May-06 Appendix 1 - Meyrick Benchmarking opex and capex report Adobe PDF365 kB
19-May-06 Appendix 2 - Benchmark Economics report Vol 1 Adobe PDF1,085 kB
19-May-06 Appendix 2 - Benchmark Economics report Vol 2 Adobe PDF505 kB
19-May-06 Appendix 3 - KPMG WACC report Adobe PDF111 kB
19-May-06 Appendix 4 - SFG WACC report Adobe PDF131 kB
19-May-06 Appendix 5 - KPMG Cost of capital report Adobe PDF65 kB
19-May-06 Appendix 6 - Expenditures report Att A Adobe PDF1,483 kB
19-May-06 Appendix 7 - Explanation of AQP Adobe PDF199 kB
19-May-06 Appendix 8 - Explanation of CCP Adobe PDF117 kB
19-May-06 Appendix 9 - Explanation of SAC Adobe PDF136 kB
19-May-06 Appendix 10 - asset valuation Adobe PDF884 kB
19-May-06 Appendix 11 - WP real pre-tax model Adobe PDF63 kB

Western Power's Response

Date Documents File type
16-Nov-05 Western Power response to section 51 notice - public version Adobe PDF1,449 kB

Western Power's proposed Access Arrangement for its network in the South West Interconnected System

Date Documents File type
24-Aug-05 Access Arrangement Covering Letter Adobe PDF
24-Aug-05 Appendix 1 - Application and Queuing Policy
24-Aug-05 Appendix 2 - Transfer and Relocation Policy
24-Aug-05 Appendix 3 - Capital Contributions Policy
24-Aug-05 Appendix 4A - Electricity Transfer Access Contract
24-Aug-05 Appendix 4B - Connection Access Contract
24-Aug-05 Appendix 4C - Interconnection Works Agreement
24-Aug-05 Appendix 5 - Price List
24-Aug-05 Appendix 6 - Price Application Policy
24-Aug-05 Appendix 7 - Revenue and Price Path Paper
24-Aug-05 Appendix 8 - Qualifying Capital Expenditure Projects

Proposed Access Arrangement Information documentation

Date Documents File type
08-May-06 Access Arrangement Information Adobe PDF1,772 kB
08-May-06 Appendix 1 - Benchmarking Report - MA Adobe PDF269 kB
08-May-06 Appendix 2 - Benchmarking Report - BME Adobe PDF778 kB
08-May-06 Appendix 2 - Benchmarking Report Appendix - BME Adobe PDF425 kB
08-May-06 Appendix 3 - Verification of Demand and Energy Forecasts by NIEIR Adobe PDF49 kB
08-May-06 Appendix 6 - Pricing Paper Adobe PDF570 kB
08-May-06 Appendix 7 - Expenditures Report Adobe PDF1,513 kB
08-May-06 Appendix 8 - Reasons for Modifying AQP Adobe PDF84 kB
08-May-06 Appendix 9 - Reasons for Modifying CCP Adobe PDF70 kB
08-May-06 Appendix 10 - Reasons for Modifying SAC Adobe PDF106 kB
08-May-06 Addendum-Asset Valuation Report Adobe PDF884 kB

Weighted Average Cost of Capital

The weighted average cost of capital (WACC), in relation to a covered electricity network, means a weighted average of the cost of debt and the cost of equity. The WACC is expressed as a percentage and is calculated under section 6.64 of the Electricity Networks Access Code (Access Code). Under the Access Code an access arrangement must set out the WACC for a covered network. The Access Code allows the ERA to make and publish a determination of the preferred methodology for calculating the WACC in access arrangements.

The Economic Regulation Authority (ERA) issued a notice confirming the expiration of the preferred WACC methodology on 22 April 2010.
On 25 February 2005, the ERA published a notice with respect to a determination on the preferred WACC methodology to apply to electricity networks that are covered under the Access Code. The preferred WACC methodology was published under section 6.65 of the Access Code and had effect for five years, commencing 25 February 2005.

Page last updated: 29 Oct 2014