High pressure gas transmission pipelines are located in registered easements where they cross private property. The terms and conditions of easements provides pipeline owners with rights of access to inspect and maintain the pipelines, and set some controls to prevent damage to the pipelines caused by external interference.

You may see our staff from time to time as they carry out inspection and maintenance activities. We will notify you before any First Gas staff or contractors come onto your property.

Easement widths vary but they are generally 12 metres wide for a single pipeline and increase by 4 meters for each additional pipeline.

The location of high pressure gas and petroleum pipelines are clearly marked by signs. However, signs are an indication only. We want to ensure the safety of anyone living or working near our natural gas pipelines. Because the pipelines are buried, it’s important that you find out what’s below before you dig – both to protect yourself and the essential services below.

Never assume you know where a pipeline is or how deep it is buried – always contact us first

Look out for:

  • Signs on kerbs, streetlights and power poles in urban areas
  • Danger signs and white fence posts in rural areas
  • White triangular signs at major river and harbour crossings
  • Marker tape may be buried above the pipeline

High pressure transmission pipelines are buried at a depth of at least 900mm. However, actual depth may vary due to changes in the ground surface since the pipelines were constructed and can result in an increase/decrease in depth.