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Alton Natural Gas Storage Project

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In October 2021, we announced the decision to decommission the Alton Natural Gas Storage Project. We submitted our plan for decommissioning to the Province of Nova Scotia, and on August 23, 2022 we received approval to proceed with decommissioning.

NEW – Alton Decommissioning Schedule – May 2023 (PDF 2.7MB)

Read the Industrial Approval for Decommissioning (PDF 98KB)

Read the decommissioning plan (PDF 6MB)

Read the appendices to the decommissioning plan (PDF 6MB)
The appendices include examples of similar decommissioning projects

Read the decommissioning plan (with appendices included) (PDF 26MB)

Read the decommissioning plan Q & A (PDF 132KB)

The Nova Scotia Utility and Review Board (NSUARB) confirmed in a letter dated September 21, 2023 that the Conditions related to decommissioning the three wells at the cavern site had been satisfied per the Canadian Standards Association (CSA) Standard Z341. See the letter from the NSUARB.

On February 7, 2022, we applied to the NSUARB for approval to decommission the wells drilled for the project. Full details of our application can be found on the NSUARB website, where you click on “Matters & Evidence” and “Go To Files & Documents.” When the new page opens, in the search box under “Go Directly to Matter,” enter M10447. Note the NSUARB considers matters related to public safety only. Its mandate does not include environmental matters.

The NSUARB has approved our plan to decommission the wells in a decision June 17, 2022. (PDF 257KB)

Latest News

What’s next for decommissioning?

Work will be starting soon to decommission the three wells that were drilled to develop natural gas storage caverns at the Alton Project.

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Safety first

Safety is a core value at Alton and integral to how we operate every day. Our project sites are work areas open only to Alton staff and approved contractors.


We are committed to being good stewards of the environment. It’s a fundamental part of how we do business at Alton.

In this section:

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We are proud to be a part of the local community, and we are committed to meaningful and open engagement with our neighbours, local Indigenous peoples and all our project stakeholders. We invest in projects and programs to help strengthen the communities where we live, work and do business.

In this section:

  • Learn about our Community Liaison Committee
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Community Involvement

Mi’kmaq engagement

We are committed to building long-term, mutually beneficial relationships with Indigenous communities that recognize and respect Indigenous and Treaty rights, individual values and traditions.