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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.
25/09/2024 - Critical Contingency at Mt Maunganui
A regional critical contingency was declared affecting the Mount Maunganui gas gate after a blockage of the gas supply inlet.
The Draft Performance Report is available for review by stakeholders.
Please refer to the Performance Report Submission Information.
A Feedback Form is provided.
Submissions should be sent to the CCO by Friday 22 November.
The Critical Contingency Incident Report was publised on 3 October 2024.
The following Notices were issued for the event:
- Critical Contingency Declaration Notice CC-087
- Critical Contingency Termination Notice CC-088
15/05/2024 - Exercise Hanguru
The CCO conducted the annual industry exercise to test the Firstgas Critical Contingency Management Plan
The exercise scenario involved unplanned gas production outages following an earthquake. This required non-regional curtailment of Bands 0, 1 , 2, 3 and 4 consumers. - CCO Annual Exercise Report - Exercise Harunga The following notices for Exercise Hanguru were published: - Critical Contingency Declaration Notice CC-083 - Direction to Curtail Demand Notice CC-084 - Revised Direction to Curtail Demand CC-085 - Status Update Notice CC-086
The exercise scenario involved unplanned gas production outages following an earthquake. This required non-regional curtailment of Bands 0, 1 , 2, 3 and 4 consumers. - CCO Annual Exercise Report - Exercise Harunga The following notices for Exercise Hanguru were published: - Critical Contingency Declaration Notice CC-083 - Direction to Curtail Demand Notice CC-084 - Revised Direction to Curtail Demand CC-085 - Status Update Notice CC-086
10/05/2023 - Exercise Karaka
The CCO conducted the annual industry exercise to test the Firstgas Critical Contingency Management Plan
The exercise scenario involved damage to the Firstgas Bay of Plenty pipeline resulting in a significant gas escape. This required a curtailment of Bands 3 to 6 consumers in the affected area. - CCO Annual Exercise Report - Exercise Karaka The following notices for Exercise Karaka were published. - Critical Contingency Declaration Notice CC-078 - Direction to Curtail Demand Notice CC-079 - Revised Direction to Curtail Demand CC-080 - Retailers to Implement Media Appeals CC-081 - Status Update Notice CC-082
The exercise scenario involved damage to the Firstgas Bay of Plenty pipeline resulting in a significant gas escape. This required a curtailment of Bands 3 to 6 consumers in the affected area. - CCO Annual Exercise Report - Exercise Karaka The following notices for Exercise Karaka were published. - Critical Contingency Declaration Notice CC-078 - Direction to Curtail Demand Notice CC-079 - Revised Direction to Curtail Demand CC-080 - Retailers to Implement Media Appeals CC-081 - Status Update Notice CC-082
15/02/2023 - Potential Critical Contingency - Gisborne Pipeline
The CCO posted the following notices for a Potential Critical Contingency situation affecting the Firstgas Transmission Pipeline near Gisborne.
CC-074 Potential Critical Contingency Notification - 15 Feb 2023
CC-075 Status Update Notice - 16 Feb 2023CC-076 Status Update Notice - 17 Feb 2023CC-077 Potential Critical Contingency Termination - 17 Feb 2023
29/01/2023 - Potential Critical Contingency - BOP Flooding Impacts
The CCO posted the following Potential Critical Contingency Declaration and subsequent Termination Declarations from 29 January 2023.
- Potential Critial Contingency Declaration (CC-070)
- Potential Critical Contingency Update (CC-071) - Potential Critical Contingency Update (CC-072) - Potential Critical Contingency Termination (CC-073)
18/05/2022 - Exercise Atiru
The CCO conducted the annual industry exercise to test the Firstgas Critical Contingency Management Plan
The exercise scenario involved the failure of the Kaitoke compressor station restricting the flow of gas south during peak demand due to bad weather. This required a regional curtailment down to band 4 at a list of affected gas gates. Subsequently the bad weather affected power in Taranaki leading to a loss of two gas production stations, requiring a non-regional curtailment of large consumers in bands 0-2 and the exploration of opportunities for additional gas supply.
- CCO Annual Exercise Report - Exercise Atiru
The following notices for Exercise Atiru were published:
- Critical Contingency Declaration Notice CCO-066
- Direction to Curtail Demand Notice CCO-067
- Revised Direction to Curtail Demand CCO-068
- Status Update Notice CCO-069
23/03/2022 - Potential Critical Contingency - Oaonui Outage.
The CCO posted the following Potential Critical Contingency Declaration and subsequent Termination Declaration on 23rd March 2022.
- Potential Critical Contingency Declaration [CCO-064]
- Potential Critical Contingency Termination [CCO-065]
05/05/2021 - Exercise Waru
The CCO conducted the annual industry exercise to test the Firstgas Critical Contingency Management Plan on 5th May 2021.
This exercise simulated damage to the First Gas "South" gas transmission pipeline near Hawera in Taranaki. The damage caused a large gas leak and required the transmission system south of Hawera through to Wellington and east through to Hastings to be isolated from supply while repairs were carried out. The estimated time to repair the pipeline was 48 hours. The CCO issued two demand curtailment instructions, firstly to bands 3 and 4, later extended to bands 5 and 6 to ensure that system pressures could be maintained at safe levels until the pipeline repairs were completed. - CCO Annual Exercise Report - Exercise Waru
This exercise simulated damage to the First Gas "South" gas transmission pipeline near Hawera in Taranaki. The damage caused a large gas leak and required the transmission system south of Hawera through to Wellington and east through to Hastings to be isolated from supply while repairs were carried out. The estimated time to repair the pipeline was 48 hours. The CCO issued two demand curtailment instructions, firstly to bands 3 and 4, later extended to bands 5 and 6 to ensure that system pressures could be maintained at safe levels until the pipeline repairs were completed. - CCO Annual Exercise Report - Exercise Waru
The following Notices for Exercise Waru were published:
- Critical Contingency Declaration Notice [CC-059]
- Direction to Curtail Demand Notice [CC-060]
- Revised Direction to Curtail Demand Notice [CC-061]
- Notice to Retailers for Media Appeals [CC-062]
- Status Update Notice [CC-063]
06/05/2020 - Exercise Hohoro
The CCO conducted the annual industry exercise to test the Firstgas Critical Contingency Management Plan on 6th May 2020.
- CCO Annual Exercise Report - Exercise Hohoro
The following Notices for Exercise Hohoro were published:
- Potential Critical Contingency Notice [CC-054]
- Critical Contingency Declaration Notice [CC-055]
- Direction to Curtail Demand Notice [CC-056]
- Status Update Notice [CC-057]
- 2nd Status Update Notice [CC-058]
08/05/2019 - Exercise Matatau
The CCO conducted the annual industry exercise to test the Firstgas Critical Contingency Management Plan on 8th May 2019.
- CCO Annual Exercise Report - Exercise Matatau
The following Notices for Exercise Matatau were published:
- Critical Contingeny Declaration Notice [CC-050]
- Direction to Curtail Demand Notice [CCO-051]
- Direction to Revise Demand Curtailment Notice [CCO-052]
- Status Update Notice [CCO-053]
09/05/2018 - Exercise Paparua
The CCO conducted the annual industry exercise to test the Firstgas Critical Contingency Management Plan on 9th May 2018.
- CCO Annual Exercise Report 2018 - Exercise Paparua
The following Notices for Exercise Paparua were published:
- Potential Critical Contingency Declaration [CCO-044}
- Declaration Notice [CCO-045]
- Demand Curtailment [CCO-046]
- Revised Demand Curtailment [CCO-047]
- Status Update #1 [CCO-048]
- Notice to Retailers for Media Appeals [CCO-049]
10/04/2018 - Potential Critical Contingency - Production Outages
The CCO posted the following Potential Critical Contingency Declaration on 10th April 2018.
- Potential Critical Contingency Declaration [CCO-042]
The CCO posted the following Potential Critical Contingency Termination on 11 April 2018.
- Potential Critical Contingency Termination [CCO-043]
23/05/2017 - System Imbalance Event
On 23 May 2017, the CCO declared a Critical Contingency following a breach of the Kapuni Gas Treatment Plant pressure threshold. Following consultation with stakeholders, the Final Performance Report for this event is available below.
- Final Critical Contingency Performance Report
The following notices for the System Imbalance Event were published:
- Critical Contingency Declaration [CCO-038]
- Critical Contingency Status Update [CCO-039]
- Critical Contingency Status Update #2 [CCO-040]
- Critical Contingency Termination [CCO-041]
- Critical Contingency Incident Report
11/04/2017 - Exercise Interface
22/06/2016 - Exercise Kakama
24/05/2016 - Unplanned Production Station Outage
24/06/2015 - Exercise Validation
25/06/2014 - Exercise Evolution
20/03/2013 - Exercise Tawiri
03/03/2012 - Pohokura Outage
25/10/2011 - Maui Pipeline Outage
13/07/2010 - Pohokura Outage