Upper South Island grid upgrade – stage 1
On 11 February 2013 we approved Transpower's proposal to upgrade the Upper South Island grid to increase the transmission capacity of the 220 kV circuits connected to Islington Substation.
In August 2014 Transpower applied for an amendment to the project outputs and major capex allowance for stage 1 of the Upper South Island grid reliability upgrade. We approved Transpower’s application for an amendment in February 2015.
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[2015] NZCC 4 Final decision on Transpower's application for an amendment to Upper South Island Stage 1 – 26 February 2015
( 986 KB, PDF )
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Upper South Island Reliability Stage 1 Project – Revision Amendment – 18 November 2014
( 917 KB, PDF )
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Transpower's application to amend the allowance and outputs for the USI Stage 1 Project – August 2014
( 1.5 MB, PDF )
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Commerce Commission letter to Transpower USI Stage 1 MCP approval
( 381 KB, PDF )
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Decision and reasons paper for USI Grid upgrade Reliability Stage 1 MCP
( 1.1 MB, PDF )
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Draft decision and reasons paper Upper South Island Grid Upgrade stage 1 MCP 13 December 2012
( 1.1 MB, PDF )
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USI Reliability Proposal A Options and Costing Report June 2012
( 829 KB, PDF )
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USI Reliability Proposal B Technical Analysis Report June 2012
( 1.2 MB, PDF )
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USI Reliability Proposal C Investment Test Analysis June 2012
( 1.6 MB, PDF )
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USI Reliability Proposal Capex Proposal June 2012
( 3.9 MB, PDF )
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USI Reliability Proposal Cover letter June 2012
( 100 KB, PDF )
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USI Reliability Proposal D Consultation on Options June 2012
( 551 KB, PDF )
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USI Reliability Proposal E ISL Substation HILP Event Study
( 1.2 MB, PDF )
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USI Reliability Proposal F Meeting the Requirements June 2012
( 4.5 MB, PDF )
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Upper South Island Grid Upgrade stage 1 April 2012
( 17 KB, PDF )
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