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Important Transmission Generation Connection Considerations

The following information is intended to assist the generator proponents with the transmission connection process.

What can save me time and money?

  • Engage an experienced consultant familiar with generation connections in Ontario.
  • Ensure adequate time for acquiring and potentially transferring land rights for the connection facilities.
  • In executing a connection project, proponents should identify any potential or planned design changes to both Hydro One and the IESO as soon as possible after the changes are considered. Failure to identify and report these changes to both parties could result in connection delays, connection refusal or additional costs.

Who do I contact for connection information? 

  • A Hydro One representative is assigned to each active project.
  • All project communication should be made with this representative to ensure effective communication.
  • Contact our representative to initiate the connection process.

What else do I need to know? 

Regulatory approvals may be required throughout the process and could have a significant impact on project timelines. They can include:

  • Ontario Energy Board (OEB) approval (Leave to Construct) is required for transmission lines in excess of 2 km
  • Environmental approvals to construct facilities on environmentally sensitive lands
  • Municipal approvals and permits, including land easements and land acquisitions
  • First Nation’s consultation and approvals.

Contestable work is the work the customer performs. Non-Contestable work is work only Hydro One can perform.

The customer must select 1 of 3 options regarding construction and ownership for any Contestable portions of the project. They are:

  • Customer build and own;
  • Customer build and transfer to Hydro One ownership, or
  • Hydro One build and own.

Cost responsibility for connection and network transmission facilities is governed by the Transmission System Code (TSC). Hydro One applies the principles of the TSC to identify costs that the customer is responsible for. There may be cases where cost responsibility may require OEB resolution, which may impact connection timelines.

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