ACT SUPPLY SECURITY PROJECT ACT SUPPLY SECURITY PROJECT

ACT SUPPLY SECURITY PROJECT

ACT SUPPLY SECURITY PROJECT • Bulk power supply to the ACT comes via Trans. Grid’s 330 k. V network to Canberra Substation. • Williamsdale Substation is connected at 330 k. V to Canberra Substation via a single line. • Actew. AGL’s 132 k. V network is supplied from Canberra and Williamsdale Substations. • Total loss of Canberra Substation would also disconnect 330 k. V line to Williamsdale and effectively blackout whole ACT. • Stockdill Substation will be connected to the 330 k. V network bypassing Canberra Substation. • If future total failure of Canberra Substation, supply will be maintained to Actew. AGL’s 132 k. V via Stockdill and Williamsdale Substations.

EXISTING 330 KV AND 132 KV NETWORK Yass 330 k. V Kangaroo Valley 132 k. V Lower Tumut Upper Tumut Canberra Gold Creek Latham Woden Rest of Actew. AGL 132 k. V network Gilmore Theodore Williamsdale

TOTAL FAILURE OF CANBERRA SUBSTATION Yass 330 k. V Kangaroo Valley 132 k. V Lower Tumut Upper Tumut Canberra Gold Creek Latham Woden Rest of Actew. AGL 132 k. V network Gilmore Theodore Williamsdale

PROPOSED STOCKDILL SUBSTATION Yass 330 k. V Kangaroo Valley 132 k. V Lower Tumut Canberra Upper Tumut Gold Creek Latham Stockdill Woden Rest of Actew. AGL 132 k. V network Gilmore Theodore Williamsdale

TOTAL FAILURE OF CANBERRA SUBSTATION – SUPPLY TO ACT MAINTAINED THROUGH STOCKDILL AND WILLIAMSDALE SUBSTATIONS Yass 330 k. V Kangaroo Valley 132 k. V Lower Tumut Canberra Upper Tumut Gold Creek Latham Stockdill Woden Rest of Actew. AGL 132 k. V network Gilmore Theodore Williamsdale

Macgregor Canberra To Upper Tumut Holt Before k oc St l dil Dr LMWQCC Stockdill site 330 k. V to Williamsdale 132 k. V to Woden

Macgregor Canberra To Upper Tumut Bypass section Holt After k oc St l dil Dr 30 w 3 k. V Ne LMWQCC Stockdill Substation 330 k. V to Williamsdale 32 ew 1 k. V N 132 k. V to Woden

PUBLIC CONSULTATION PROCESS ACT Government (Environment and Planning Directorate) to lead community liaison and engagement activities. As part of the Environment Impact Statement process and Development Application process there will be public notification – scheduled for July 2017.