This project is being planned in accordance with the Class Environmental Assessment for Minor Transmission Facilities.  The Class EA process is an effective way of ensuring that transmission projects that have a predictable range of effects are planned and carried out in an environmentally-acceptable manner.

The project also requires “Leave to Construct” approval under Section 92 of the Ontario Energy Board Act, 1998.  The Ontario Energy Board (OEB) regulates Ontario’s natural gas and electricity sectors and determines whether the construction and operation of proposed projects are in the public interest.  For more information on the OEB, visit:

There are opportunities for public and stakeholder involvement and input during the Environmental Screening process and the OEB approval process.

The project underwent an Environmental Screening.  Screening criteria were used to assess the potential significance of effects.  The proposed re-conductoring of the existing transmission line will be undertaken within the existing transmission right-of-way and can be done without effects on the environment. Hydro One submitted an Environmental Screening Letter to the Ministry of the Environment on March 9, 2012.

On March 28, 2012, Hydro One filed an application under Section 92 of the Ontario Energy Board Act, 1998, seeking ‘Leave to Construct’ the Lambton to Longwood Transmission Upgrade Project.  The OEB has assigned file number EB- 2012-0082 to this project.  Read Hydro One’s pre-filed evidence. 

On April 19, 2012, the OEB issued a Notice of Application and Written Hearing which was published in newspapers within the project area on May 2 and May 3, 2012.  Parties interested in participating in a written hearing for this project were asked to advise the OEB of their desired level of participation.

On November 8, 2012, the OEB granted Hydro One 'Leave to Construct' to upgrade the transmission line between Lambton Transformer Station (TS) and Macksville Junction, just southwest of Hydro One’s Longwood TS.


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