Project and Background Description

Ontario Power Generation (OPG) is planning to add 450 megawatts (MW) of new generation to the Lower Mattagami River system. To accommodate some of this new generation, Hydro One is required to add a second 230 kilovolt (kV) circuit to the existing towers that run from Harmon Junction (Jct) to Kipling Generating Station (GS), approximately 4 km in length, as shown on the map below.

Eleven of the thirteen existing transmission towers from Harmon Jct to Kipling GS would require modification and two anchor towers would need to be replaced. The project is expected to have minimal environmental impact since no vegetation removal or right-of-way widening is required and construction crews will be able to utilize existing access roads.  Construction is expected to begin in early 2011 with an in-service date of June 2013.