Historical Critical Contingency Events & Notices
This page is used to publish information including notices, updates and reports relating to historical critical contingency events and exercises. For information relating to a current Critical Contingency Event refer to the Current CC Events page.
23/05/2017 - System Imbalance Event
On 23 May, the CCO declared a Critical Contingency following a breach of the Kapuni Gas Treatment Plant pressure threshold. The Incident Report for this event is available below. The CCO is currently preparing a Performance Report for this event to be published within 30 business days of the event. This report will assess the Critical Contingency in
more detail and provide the opportunity for Stakeholders to make submissions on
the draft report.
11/04/2017 - Exercise Interface
The CCO conducted its annual industry exercise - "Exercise Interface" on the 11/04/2017.
The exercise started at 9:00am and ran through until 4:00pm. The exercise simulated accidental damage to the First Gas Ltd Maui pipeline north of Pirongia resulting in an uncontrolled gas escape. This resulted in the transmission pipeline system north of Pirongia being isolated for 24 hours while repairs were carried out. In order to conserve linepack and pressure in the system, the CCO issued curtailment instructions affecting consumers in Bands 1 to 6.
The CCO would like to thank all the participants involved in the exercise.
22/06/2016 - Exercise Kakama
24/05/2016 - Unplanned Production Station Outages
24/06/2015 - Exercise Validation
25/06/2014 - Exercise Evolution
20/03/2013 - Exercise Tawiri
30/03/2012 - Pohokura Outage
25/10/2011 - Maui Pipeline Outage
16/03/2011 - Exercise Tuarua
13/07/2010 - Pohokura Outage
05/02/2010 - Exercise Initial
Potential Critical Contingencies