Langdon to Janet Transmission Project

AltaLink submitted a Facilities Application for this project to the Alberta Utilities Commission (AUC) for review in July 2012. The AUC approved the project on October 7, 2013. Thank you for participating in our consultation process – your input is important to us.

The Langdon to Janet Transmission Project is part of an area transmission development called the Foothills Area Transmission Development (FATD). This development includes new transmission lines and upgrades to the electric system in Calgary and the communities south and east of the city. The majority of the transmission system in the area was built in 1985, since that time the population and industry has grown substantially. These projects will ensure power from new generation plants, including wind power from southern Alberta, is connected to Alberta's electric system and maintain a reliable supply of electricity to support the growth and demand in this area.


The approved project includes: 

  • a new 240 kV transmission line from the Langdon Substation to the Janet Substation
  • modifications to existing transmission lines in the east Calgary area
  • an expansion and upgrade of the existing Langdon and Janet Substations located east of Calgary

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Helicopter work and implosive connectors

If you live or work near the project, you may notice a helicopter flying in the area and hear some loud explosive sounds over the next few weeks and months. Helicopters are used to move sections of transmission structures from assembly yards to designated locations on the right-of-way. Helicopters are also used to string the new transmission structures with conductor (wire).

During the wire stringing process we will be fusing portions of wire together using implosions. The implosions do not pose a safety risk to surrounding residences; however, they will emit a loud explosive sound. There should not be more than a few loud explosive sounds on days when this work is scheduled to occur. This work will be completed during day light hours only.

Helicopter work is currently scheduled for the middle of February to fly structures into place between the Langdon and Calgary areas.

There may be implosive connector work in the Calgary area near the end of February with the majority of the implosions taking place on the project in April/May. 

For more information about helicopter work and implosive connectors, please click here.

Thank you for your patience.



January 2015
Construction update - helicopter work and implosive connectors
October 2014
Construction update newsletter
May 2014
Construction update postcard
November 2013
Detail base (DB) map of approved project
Detail photo (DP) map of approved project
October 2013
Notice of project approval
July 2012
Notice of filing
Detail photo map
detail base map
May 2012
Update postcard
November 2011
Open house information panels
October 2011
Volume 2 newsletter preferred and alternate
Detail base map
detail photo map
AESO need overview
Structure types and work spaces
Foothills Area Transmission Development Overview map
May 2011
Open house information panels
March 2011
Volume 1 newsletter
Detail base map
Detail photo map
AESO notification letter
Projects in your area
Public involvement in needs or Facilities Applications
Good neighbours
A dialogue on electric and magnetic fields

Project Status:
complete

Anticipated Project Schedule

Spring 2014 Start Construction
Summer 2015 Complete Construction

Although we attempt to follow the anticipated project schedule, it is subject to change. We will continue to provide you with updated schedule information as the project progresses.

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