As First Gas owns and operates over 2,200 kilometres of high pressure gas transmission pipelines throughout the North Island and manages over 600km of easements for other pipelines owners, you may own or be living or working on a property that is crossed by buried transmission pipelines.

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 pipelines and increase by 4 metres for each additional pipeline.

The location of high pressure gas and petroleum pipelines are clearly marked [photo e.g.s of signs and marker posts somewhere]. However, signs are an indication only. For your personal safety, and the safety of the pipelines, you must contact us before undertaking any works on or near the easement.

Look out for:

  • Danger signs and white painted fence posts in rural areas
  • White triangular signs at major river and harbour crossings
  • Signs on kerbs, streetlights and power poles in urban areas
  • 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.