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Milltown Decommissioning


Project Background

The Milltown hydroelectric station has been in operation on the St. Croix River since the early 1880s. As such, it is the oldest operating hydroelectric generating station in Canada and the facilities have reached the end of their life.

NB Power investigated the possibility of extending Milltown’s life as well as improving the fish passage. After a thorough engineering and cost evaluation process, it was determined that extending the life of the generating station was not financially feasible and the Milltown Generating Station should be decommissioned.

Before NB Power can proceed with decommissioning, the project will be registered for an Environmental Impact Assessment with the provincial Department of Environment and Local Government in the summer of 2019.

Following the Environmental Impact Assessment process, NB Power expects that decommissioning activities would start in the fall of 2020 and continue throughout 2021.


Benefits of Decommissioning

  • Decommissioning the Milltown Generating Station and removing the dam will allow for the restoration of Salmon Falls and approximately 16 kilometers of the St. Croix River. This will make about five million square metres of spawning habitat available to the various diadromous fish species.
  • The generating station accounts for about 0.8 per cent of NB Power’s hydro generation, so there will not be a major impact on the overall New Brunswick power grid resulting from the decommissioning.


Proposed Project Schedule

Project Activities Timelines

Engagement with First Nations and Stakeholders

Summer 2019 and ongoing through the project

First Nation and Public Open Houses

Summer/Fall 2019

Environmental Impact Assessment Submission (available for public review) and permit

Fall 2019

Decommissioning Activities

Fall 2020 – throughout 2022


More questions?

For more information on this project, contact us at