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


08/05/2019 - Exercise Matatau

The CCO conducted its annual industry exercise, "Exercise Matatau", on the 08/05/2019.  

The exercise involved a significant reduction in gas supply to the First Gas transmission system due to unplanned outages at the Pohokura, Turangi, Kowhai McKee and Mangahewa Production Stations in Taranaki.  This was due to a power outage caused by a localised tornado that damaged both the 33KV and 11KV networks in the Tikorangi area. The estimated time to repair was 60 hours.  The CCO issued two curtailment instructions, firstly to bands 0, 1 and 2, later extended to bands 3 and 4. 

Date

Time

Notice ID

Notice Type

Issued To

07/06/2019



CCO Annual Exercise Report - Exercise Matatau

Stakeholders

08/05/2019

12:50

CC-0053

Critical Contingency Status Update

Stakeholders

08/05/2019

11:30

CC-0052

Critical Contingency Revised Curtailment

TSO

08/05/2019

10:30

CC-0051

Critical Contingency Curtailment

TSO

08/05/2019

09:45

CC-0050

Critical Contingency Declaration

TSO & Stakeholders

15/03/2019



CCO Annual Exercise Participant's Brief

TSO & Stakeholders


09/05/2018 - Exercise Paparua

The CCO conducted its annual industry exercise - "Exercise Paparua" on the 09/05/2018.
The exercise simulated a major landslip on the First Gas Ltd Maui pipeline in north Taranaki.  This resulted in the pipeline being isolated for 7 -14 days while repairs were carried out.  In order to conserve linepack and pressure in the transmission system, the CCO issued curtailment instructions affecting consumers in Bands 1 to 6. 

Date

Time

Notice ID

Notice Type

Issued To

06/06/2018



CCO Annual Exercise Report

Stakeholders

​09/05/2018

1.30pm

CC-0049

Notice to Retailers For Media Appeals

Retailers

​09/05/2018

​1:00pm

CC-0048

Status Update #1

Stakeholders

09/05/2018

​12:30pm

CC-0047

Revised Demand Curtailment

TSO

09/05/2018

​11:00pm

CC-0046

Demand Curtailment

TSO

09/05/2018

​10:30am

CC-0045

Declaration Notice

TSO & Stakeholders

​09/05/2018

​09:30am

CC-0044

​Potential Critical Contingency Declaration

TSO & Stakeholders

28/03/2018



CCO Annual Exercise - Participants Brief

TSO & Stakeholders


10/04/2018 - Potential Critical Contingency - Production Outages

Date

Time

Notice ID

Notice Type

Issued To

11/04/2018

08:30am

CC-0043

Potential Critical Contingency Termination

TSO & Stakeholders

10/04/2018

09:00am

CC-0042

Potential Critical Contingency Declaration

TSO & Stakeholders


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.  Following consultation with stakeholders, the Final Performance Report for this event is available below.

Date

Time

Notice ID

Notice Type

Issued To

18/07/2017



Final Critical Contingency Performance Report

Stakeholders

30/05/2017



Critical Contingency Incident Report

Stakeholders  

23/05/2017

18:20

CC-0041

Critical Contingency Termination​

TSO & Stakeholders

23/05/2017

15:20

CC-0040

Critical Contingency Status Update #2

Stakeholders  

23/05/2017

13:10

CC-0039

Critical Contingency Status Update

Stakeholders  

23/05/2017

11:10

CC-0038

Critical Contingency Declaration

TSO & Stakeholders  


11/04/2017 - Exercise Interface

Date

Time

Notice ID

Notice Type

Issued To

​11/05/2017



​CCO Annual Exercise Report

Stakeholders

​11/04/2017

​3:30pm

CC-0037

Termination Notice

TSO & Stakeholders

​11/04/2017

​2:30pm

CC-0036

Notice to Restore Curtailed Demand

TSO

​11/04/2017

​12:45pm

CC-0035

Status Update #2

Stakeholders

​11/04/2017

​11:30am

CC-0034

Notice to Retailers For Media Appeals

Retailers

​11/04/2017

​11:00am

CC-0033

Revised Demand Curtailment

TSO

​11/04/2017

​10:30am

CC-0032

Status Update #1

Stakeholders

​11/04/2017

​10:00am

CC-0031

Demand Curtailment

TSO

11/04/2017

​9:30am

CC-0030

Declaration Notice

TSO & Stakeholders

09/02/2017



CCO Annual Exercise - Participants Brief

TSO & Stakeholders


22/06/2016 - Exercise Kakama

Date

Time

Notice ID

Notice Type                               

Issued To:

20/07/2016



CCO Annual Exercise Report - Exercise Kakama

Stakeholders            

22/06/2016 

15:10        

CC-0029 

Termination of Critical Contingency

First Gas TSO & Stakeholders

22/06/2016

14:00

CC-0028

Direction to Restore Demand

First Gas TSO

22/06/2016

12:30

CC-0027

Status Update

Public & Stakeholders

22/06/2016

10:15

CC-0026

Direction to Curtail Demand

First Gas TSO

22/06/2016

09:30

CC-0025

Declaration of Critical Contingency

First Gas TSO & Stakeholders




CCO Annual Exercise Participants Brief - Exercise Kakama

Stakeholders

 

24/05/2016 - Unplanned Production Station Outage

Date

Time

Notice ID

Notice Type                               

Issued To:

12/08/2016

10:00


CCO Performance Report

First Gas TSO & Stakeholders

31/05/2016

16:30


CCO Incident Report

TSOs & Stakeholders

24/05/2016

23:00

CC-0024

Critical Contingency Termination

TSOs, Stakeholders & Interested Parties

24/05/2016

19:30

CC-0023

Critical Contingency Status Update

Stakeholders

24/05/2016

18:30

CC-0022

Critical Contingency Declaration

TSOs, Stakeholders & Interested Parties

  

24/06/2015 - Exercise Validation

Date

Time

Notice ID

Notice Type                               

Issued To:

22/07/2015



CCO Annual Exercise Report

Stakeholders

01/07/2015



CCO Annual Exercise Retailers Self Assessment Form

Retailers

24/06/2015

14:45

CC-0021

CC Termination

Stakeholders

24/06/2015

14:25

CC-0020

CC Restore Demand

Vector TSO

24/06/2015

12:45

CC-0019

CC Status Update

Public

24/06/2015

12:00

CC-0018

CC Media Appeals

Retailers

24/06/2015

11:45

CC-0017

CC Revised Curtailment

Vector TSO

24/06/2015

11:00

CC-0016

CC Curtailment

Vector TSO

24/06/2015

08:58

CC-0015

CC Declaration

Stakeholders

25/05/2015



CCO Annual Exercise Participants Brief

Exercise Participants


25/06/2014 - Exercise Evolution 

Date

Time

Notice ID

Notice Type                               

Issued To:

24/07/2014



Exercise Evolution Report

Stakeholders

12/05/2014



Exercise Evolution Participants Brief

Stakeholders


20/03/2013 - Exercise Tawiri

Date

Time

Notice ID

Notice Type                               

Issued To:

19/04/2013



Exercise Tawiri Report

Stakeholders




Exercise Tawiri Participants Brief

Stakeholders


03/03/2012 - Pohokura Outage 

Date

Time

Notice ID

Notice Type                               

Issued To:

02/04/2012



Performance Report

Stakeholders

09/03/2012



Incident Report

Stakeholders



25/10/2011 - Maui Pipeline Outage

Date

Time

Notice ID

Notice Type                               

Issued To:

22/12/2011



Performance Report

Stakeholders

04/11/2011



Incident Report

Stakeholders


16/03/2011 - Exercise Tuarua 

Date

Time

Notice ID

Notice Type                               

Issued To:

10/05/2011



Exercise Tuarua Report

Stakeholders




Exercise Tuarua Participants Brief

Stakeholders


13/07/2010 - Pohokura Outage 

Date

Time

Notice ID

Notice Type                               

Issued To:

10/08/2010



Performance Report

Stakeholders

20/07/2010



Incident Report

Stakeholders


25/02/2010 - Exercise Initial

Date

Time

Notice ID

Notice Type                               

Issued To:

 25/05/2010



Exercise Initial Report

Stakeholders




Exercise Initial Participants Brief

Stakeholders