Registry Search Mobile

Registry Search

TOPAZ Submarine fibre-optic cable

The Proposed Project

TOPAZ Cable System

The proposed submarine fibreoptic cable system – Topaz - consists of a main cable between Port Alberni, BC and, in Japan, Shima (Mie prefecture) to the South, and Takahagi (Ibaraki Prefecture) to the North. In addition, a second cable for future development will extend from Port Alberni and terminate at the headlands of Barkley Sound.


The Topaz submarine cable system will extend from an existing telecommunications facility near Canal Beach in Port Alberni and will follow Alberni Inlet to the ocean. The main cable will extend onto the continental shelf and then follow a Northern Pacific route to Japan. The second cable will terminate at the headlands of Barkley Sound and is intended to minimize nearshore disturbances when  a second cable lands in  Canada in the future.


The Canadian point of origin for the Topaz system will be an existing land-based communications facility located in Port Alberni. The cables will transition from the facility to a beach manhole via an underground duct measuring approximately 200 metre and located approximately 1.2 m below existing grade. From the beach manhole the cables will access Alberni Inlet. The system will be surface lain within Alberni Inlet with burial starting towards the mouth of Trevor Channel. Burial will be undertaken by towed plough from Barkley Sound headlands (approx. 100 m water depth) to approximately 1500 m water depth. The system will be surface laid in water depths greater than 1500 m. Cable installation within Canadian waters is anticipated to be completed within a 2 week timeframe during the late Spring of 2021.


This map is for illustrative purposes. The markers represent the approximate locations based on available data. More than one marker may be identified for a given assessment.


Latest update

The public comment period on the project is closed. Innovation, Science and Economic Development Canada is considering comments received to help inform its determination on whether the carrying out of the project is likely to cause significant adverse environmental effects..


Public Services and Procurement Canada
Mark McNeil, Senior Environmental Specialist
Telephone: 709-637-4481

  • Location

    • Port Alberni (British Columbia)
  • Nature of Activity

    • Other, not otherwise specified
  • Assessment Status

    In progress
  • Start Date

  • Proponent

    Google Canada
  • Authorities

    • Innovation, Science and Economic Development
  • Assessment Type

    Project on federal lands
  • Reference Number


Nearby assessments

..within 200 kilometres
Date modified: