SE Substation > Overview
ENMAX’s preferred option is to build a new substation,ENMAX No. 45 Substation. As part of the preferred option, ENMAX would construct and modify the existing transmission infrastructure on 24 Street SE near the community of Quarry Park to connect ENMAX No.45 Substation to the transmission system. ENMAX No. 45 Substation would be located approximately 800 metres northeast of 24 Street SE and Quarry Park Blvd SE.
ENMAX’s alternate option would include expanding the existing ENMAX No. 31 Substation, located at 3515 80 Ave SE. As part of the proposed upgrades, ENMAX would construct and modify the existing transmission infrastructure located at ENMAX No. 31 Substation.
A new transmission line is required as part of the preferred option to connect the new substation to the transmission system. ENMAX proposes to install a new 800 metre double circuit 138kV overhead transmission line consisting of eight new self-supporting steel monopoles (monopoles). The monopoles, consisting of double circuit dead-end, single circuit dead-end, and double circuit tangent monopoles, will range from approximately 20 to 40 metres in height. In addition to the eight monopoles, two A-frame structures will be installed within the substation fence line and will range from approximately 15 to 20 metres in height. Three existing wood transmission poles (wood poles) on transmission line 138-31.84L will be replaced with two single circuit and one double circuit dead-end steel monopoles ranging from approximately 20 to 30 metres in height.
A new wood transmission pole on transmission line 138-9.80L will be installed outside No. 31 Substation. This new pole will be a single circuit double dead-end wood pole with anchor wires, approximately 30 metres in height.
For both the preferred and alternate options, ENMAX will remove the existing outdoor switchgear from No. 32 Substation. One outdoor transformer will be removed from service but will remain at the No. 32 Substation site as a spare. The buildings and other outdoor equipment at No. 32 Substation will remain, and the substation will continue to be operational.
Temporary access accommodations and road closures may take place periodically during construction. ENMAX will work with stakeholders and the City of Calgary to minimize the impact to residences, businesses, and commuters in the area. There are no power outages impacting customers planned as part of this project.
If you have any questions or wish to discuss this project, please contact us:
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ALBERTA UTILITIES COMMISION (AUC)
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