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Chinook Substation Development

Current Status Complete
Next Steps Preliminary Engineering​
​Location Northwest Lethbridge

About the Project

This project is the construction of a new Electric Substation in west Lethbridge.

The purpose of this project is to provide a long term reliable supply of electrical energy to the north section of west Lethbridge.  In addition, the new transmission facilities will provide a back up supply of electrical energy to the south section of West, North, and South Lethbridge during contingency events on the electrical utility system.

A 2.8 km section of 138 kV transmission line will be built to connect to the Alberta Integrated Electric System (AIES).  Interconnection to the AIES will be made 800 m north and west of the city limits to an existing transmission line owned by Altalink.  The transmission line will terminate at a new transmission substation (181S Chinook) which will be located immediately west of the Archmount Cemetery. 

The 181S Chinook substation will transform the electrical energy from 138 kV (transmission voltage level) to 13.8 kV (distribution voltage level) to allow the City of Lethbridge distribution system to connect growing customer electrical load in the north section of West Lethbridge.


Event​ Proposed Date​
Preliminary Planning and AESO Interconnection Request Submitted​ Q3 2011​
AESO Direction Issued to begin Public Consultation​ Q4 2012​
Public Consultation Begins​ Q2 2013​
Public Consultation Open House Lethbridge Public Library Crossings Branch​
Q2 2013​
Public Consultation Complete​ Q2 2013
City Council Decision​ ​Q2 2013
Alberta Utilities Commission  Facility Application Submission​
Sept 19,  2013​
Alberta Utilities Commission Decision​
Q1 2014​
Preliminary Design​ Q4 2013 – Q2 2014​
Detailed Design​ Q1 2014 – Q4 2014​
Construction / Commissioning Q1 2014 - Q2 2015​


City Council approval in the 2014-2023 Capital Improvement Plan

​Source Project Element​ ​Amount
MRSR (Municipal Revenue Stabilization Reserve)​ Transmission Line​ $2.8 M​
Financing (Electric Rates)​ Substation​ $11.7 M​




​Contact Information

Stewart Purkis, P.Eng.
Electric Transmission Design Manager
City of Lethbridge Electric Utility
403 320 4166