# Pipeline statistics – 2011

## Statistical summary, pipeline occurrences 2011 – Accessibility page

**Figure 1.** The figure is a bar graph representing the number of pipeline accidents and accident rate per year from 2002 to 2011.

In 2002 there were 20 accidents and a rate of 1.57 accidents per exajoule.

In 2003 there were 21 accidents and a rate of 1.63 accidents per exajoule.

In 2004 there were 7 accidents and a rate of 0.54 accidents per exajoule.

In 2005 there were 5 accidents and a rate of 0.39 accidents per exajoule.

In 2006 there were 8 accidents and a rate of 0.61 accidents per exajoule.

In 2007 there were 7 accidents and a rate of 0.53 accidents per exajoule.

In 2008 there were 6 accidents and a rate of 0.48 accidents per exajoule.

In 2009 there were 15 accidents and a rate of 1.21 accidents per exajoule.

In 2010 there were 11 accidents and a rate of 0.89 accidents per exajoule.

In 2011 there were 5 accidents and a rate of 0.39 accidents per exajoule.

**Figure 2.** The figure is a pie chart that shows the breakdown of accidents by facility type for a 10 year period from 2002 to 2011.

Compressor station facilities represented 25.7% of accidents.

Gas processing plant facilities represented 22.9% of accidents.

Transmission line facilities represented 20% of accidents.

Gathering line facilities represented 13.3% of accidents.

Other facilities represented 18.1% of accidents.

**Figure 3.** The figure is a pie chart that shows the breakdown of accidents with a release by quantity released for a 10 year period from 2002 to 2011.

82.5% of accidents were releases of less than 1 cubic metre.

7.9% of accidents were releases of 1 to 25 cubic metres.

6.3% of accidents were releases of 26 to 1000 cubic metres.

3.2% of accidents were releases greater than 1000 cubic metres.

**Figure 4.** The figure is a bar graph representing the number of pipeline incidents per year with a trend line from 2002 to 2011.

In 2002 there were 35 incidents.

In 2003 there were 38 incidents.

In 2004 there were 74 incidents.

In 2005 there were 79 incidents.

In 2006 there were 63 incidents.

In 2007 there were 64 incidents.

In 2008 there were 84 incidents.

In 2009 there were 118 incidents.

In 2010 there were 145 incidents.

In 2011 there were 165 incidents.

**Figure 5.** The figure is a pie chart that shows the breakdown of incidents by facility type for 2011.

Compressor station facilities represented 13.3% of incidents.

Meter station facilities represented 12.1% of incidents.

Pump station facilities represented 27.9% of incidents.

Terminal facilities represented 15.8% of incidents.

Transmission line facilities represented 19.4% of incidents.

Other facilities represented 11.5% of incidents.

**Figure 6.** The figure is a pie chart that shows the breakdown of incidents with a release by quantity released for 2011.

86.2% of incidents were releases of less than 1 cubic metre.

8.3% of incidents were releases of 1 to 25 cubic metres.

2.1% of incidents were releases of 26 to 1000 cubic metres.

3.4% of incidents were releases greater than 1000 cubic metre.

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