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TransGrid PSCR - Managing the Risk of Corrosion between Vales Point and Sydney North on Line 22

31/08/2018
Market National Electricity Market
StageProject Specification Consultation Report
ConvenorAEMO NSP
Initiated31/08/2018
Accepting submissions?No
Submissions close29/11/2018

Managing the Risk of Corrosion between Vales Point and Sydney North on Line 22

TransGrid has recently published a Project Specification Consultation Report for Managing the Risk of Corrosion between Vales Point and Sydney North on Line 22.

Constructed in 1962, Line 22 is a single circuit steel tower 330 kV transmission line connecting Vales Point and Sydney North 330 kV substations. The transmission line is 86km long and predominately traverses small rural holdings, heavily timbered ridgetops and National Parks. It crosses the M1 Motorway, Pacific Highway and Main Northern Railway line as well as numerous local roads.

As part of TransGrid’s ongoing routine asset monitoring maintenance, it has been revealed that many of the 190 transmission structures of Line 22 are corroded, including steel towers, insulators, conductor fittings and conductor/earth wire. Corrosion greatly increases the likelihood of conductor drops and presents consequent bushfire risks and safety risks.

TransGrid considers that the only feasible option from a technological and project delivery perspective is replacing or refurbishing corroded components in one stage.

The estimated capital cost of the proposed preferred option is $9.08 million.

In accordance with the requirements of the Rules, a summary of the Project Specification Consultation Report is made available on the AEMO website. A copy of the Project Specification Consultation Report can be obtained from TransGrid Website on the RIT-T Consultations page or by emailing RIT-TConsultations@TransGrid.com.au

Submissions Project Specification Consultation Report are required by the closing date of 29 November 2018.

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