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Our equipment is not only found on land, such as our power lines, but also in lakes and rivers. Hydro One has approximately 3,700 kilometres of submarine cable in our service territory. ​

Image of trees Our submarine cables are located in areas across the province that include Muskoka, Parry Sound, Penetang, Bancroft, Thousand Island​s, North Bay, Sudbury, Kenora, Manitoulin and New Liskeard.

We also d​eliver electricity to customers living on islands with submarine cables. This
includes Pelee Island, which has a submarine cable approximately 24 kilometres in length, and is the main supply for the Island.

You may have seen signage near water, which we install to help identify areas where submarine cables are present to ensure public safety and help prevent damage to our equipment​.

A ground mounted transformer near a water body, such as in the photo above, is also a good indication that a submarine cable may be nearby. It's also important to be aware of underwater cables when installing pylons for docks, boat anchors and boat houses.

We reg
ularly inspect our equipment in order to identify improvements, enhancements or any repairs required in order to deliver safe and reliable electricity to our customers. Our crews will also patrol shorelines for damaged or missing sign​age.

In 2016, we replaced 100 kilometres of submarine cable that was damaged or had reached its end of life. In some cases, a planned power outage is required in order to complete our work safely.

When you plan ahead, you avoid potential power loss, damage liability and serious personal injury. Before performing any work in and around the shoreline be sure to contact
Ontario One Call and clearly indicate where you plan on working. This service is available 24/7 through their website or by calling 1-800-400-2255. You will receive information regarding the location of any submarine cables in and around the shoreline that may be present in your proposed work area.

Hydro One reminds its customers and the public to keep safe distances away f
rom our equipment and while ​our crews working. For more safety tips and reminders, check out our Safety section. 

Image of Warning sign

Example of Hydro One signage for submarine cables

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