PROJECT OVERVIEW

To accommodate The City of Calgary’s future Green Line LRT project, ENMAX Power Corporation (ENMAX Power) received approval to relocate a portion of its 138kV underground transmission lines 1.82L and 1.84L (1.82L and 1.84L) in the Beltline area (the Project). Relocation of a portion of 1.82L and 1.84L will accommodate the new LRT network and provide continued reliability of ENMAX Power’s transmission system.

The Project involves relocating a portion of 1.82L and 1.84L currently located underground along 11 Avenue South to an underground alignment along 10 Avenue South (‘South’ is used when referring to the avenues between 1 Street SW and Macleod Trail SE). The new alignment will be located between ENMAX No. 5 Substation (intersection of Macleod Trail SE and 10 Avenue SE) and the intersection of 1 Street SW and 11 Avenue SW. Once the relocation is complete, the existing underground lines along 11 Avenue South between Macleod Trail SE and 1 Street SW will be removed.

PROJECT DESCRIPTION

To construct the Project, ENMAX Power will excavate (open trench) along 10 Avenue South and along 1 Street SW and install a duct bank that will house two circuits of 138kV cable. The cable will then be installed in the newly constructed duct bank and, once in place, the new cable will be connected to the existing 1.82L and 1.84L transmission lines. In addition, two maintenance holes will be installed along 1 Street SW to allow future access to the newly installed transmission lines.

ENMAX Power will work with The City of Calgary to remove the existing duct bank and maintenance holes located along 11 Avenue South as part of the Green Line LRT project after the transmission lines are relocated.

ENMAX Power anticipates a short construction timeline to meet the needs of the LRT expansion, which will limit potential impacts to residents and businesses in the area.