AltaLink announces more public consultations re Castle Rock Ridge to Chapel Rock transmission line

Tuesday, April 28, 2015

Pincher Creek Voice

As posted on the blog of Crownest Pass Councillor Dean Ward, the following correspondence from AltaLink is reprinted here in its entirety. As noted by Ward, it appears that the AltaLink Castle Rock Ridge to Chapel Rock Transmission Project will not be going through the Pass. (Related reading: Crowsnest Pass council opposes transmission line).


Dear Municipal Stakeholder:

Today, as part of my commitment to keep you informed of AltaLink’s projects in your area, I’m pleased to send you the Castle Rock Ridge to Chapel Rock round 2 public consultation material being mailed in the coming days to the landowners and stakeholders in your Municipal District. AltaLink will also be providing your municipal office with printed versions of this material so you’ll have exactly what stakeholders will receive in their mail boxes. All the project details and the proposed schedule are shown in the Newsletter and other information attached.

AltaLink has refined the routing under consideration by adjusting some proposed routes and eliminating other routes and substation sites. The Dropped Route Letter will only be sent to the Stakeholders whose land is on dropped routes but is included in this email for information purposes.

The proposed project includes:

  • A new substation, to be called Chapel Rock Substation, located near the existing 500 kV (500,000 volts) 1201L transmission line. The proposed substation site will be approximately 255 by 210 metres (820 by 1,150 feet).
  • The existing Castle Rock Ridge Substation will be expanded as part of this project to accommodate the termination of the proposed new 240 kV transmission line. We are proposing to extend the northeast and northwest fence by approximately 25 metres (82 feet) in each direction.
  • Approximately five to 15 kilometres (3.1 to 9.3 miles) of two new, single circuit 500 kV transmission lines will also be required. The length of these lines depends on the location of the Chapel Rock Substation. We are proposing to use two single circuit, guyed structures for the portion within the hills west of Highway 22. These structures will be used for straight portions of the line. At locations where the line deflects, self-supporting steel lattice structures will be used.
  • Approximately 24 to 37 kilometres (15 to 23 miles) of new double circuit 240 kV transmission line from the existing Castle Rock Ridge Substation to the proposed Chapel Rock Substation. Final line length is dependent on the route approved by the AUC.

There are numerous ways for the public and stakeholders to provide input including:


Alberta Electric System Operator (AESO)

Alberta Utilities Commission (AUC)

  • email at [email protected]
  • calling at 780-427-4903 (You can call toll-free by dialing 310-0000 before the number.)
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