DOWNTOWN TRANSMISSION REINFORCEMENT PROJECT PROPOSED TRANSMISSION LINE

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PROJECT OVERVIEW The demand for power is increasing as Calgary continues to grow. The Electric System Operator (AESO) has determined that the existing transmission system in Calgary can become overloaded under certain conditions. Overloaded transmission lines reduce the reliability of your power supply and increase the likelihood of interruptions in power supplied to homes and businesses. The AESO has therefore identified the need for transmission reinforcement into the downtown area. On November 18, 2015, the AESO filed its Needs Identification Document (NID) for Transmission System Reinforcement in with the Alberta Utilities Commission (AUC). On June 1, 2016, the AUC approved the AESO’s NID. To meet this need ENMAX Power Corporation (ENMAX) is proposing to build a new 138 kV transmission line between ENMAX No. 2 Substation located at 3120 – 9 SE, and ENMAX No. 8 Substation located at 903 – 4 Avenue SW.

For more than 100 years, ENMAX has delivered safe and reliable electricity in Calgary. Moving electricity from the point where it is generated to our customers’ homes and businesses is split into two areas: transmission and distribution.

To move our electricity from power generating facilities to local areas, ENMAX Power Corporation relies on a system of high- voltage power lines across Alberta, including our own 288 km network within the city. These transmission lines enter a substation where a transformer reduces voltage to a level that can be safely delivered to customers.

STAKEHOLDER NEWSLETTER | MAY 2017 DOWNTOWN CALGARY TRANSMISSION REINFORCEMENT PROJECT PROPOSED TRANSMISSION LINE

PROJECT DESCRIPTION

The proposed project consists of the following:

Transmission Line: • Construct a new 138 kV single circuit transmission line approximately 5.5 km in length, from No. 2 Substation to No. 8 Substation. • Approximately 2 km would be an overhead line from No.2 Substation to the north side of the at 1 ST SE. • Approximately 3.5 km would be an underground line in a new ductbank and manhole system, from the north side of the Elbow River at 1 ST SE to No. 8 Substation. • ENMAX is proposing to drill 1 km of the underground construction on 9 ST SW starting at 14 Ave SW to 4 Ave SW, due to heavy rail and LRT crossings. ENMAX is proposing to trench the remaining 2.5 km of underground construction . Proposed Steel Transmission Pole • Relocation or reconfiguration of other utilities will be required for the proposed project.

Substations: • No. 2 Substation: Connect the new transmission line to the existing switchgear. • No. 8 Substation: Modify the existing switchgear to connect the new transmission line. • All substation work will be conducted inside the existing control buildings at both substations.

TRANSMISSION POLES No.2 Substation

The proposed single circuit transmission poles for the overhead portion will be self-supporting steel monopoles. All poles except one will range in height from approximately 18 to 28 metres (59 to 92 feet) and will be 50 to 160 metres (165 to 524 feet) apart. One pole located near No.2 Substation will be approximately 32 metres in height.

SAFETY AND RELIABILITY Calgarians rely on us every day to provide them with safe and reliable power. As our city grows, so do our needs for electricity. At ENMAX Power, we are committed to providing long-term, innovative solutions to meet the growing demands of our city. No.8 Substation

STAKEHOLDER NEWSLETTER | MAY 2017 DOWNTOWN CALGARY TRANSMISSION REINFORCEMENT PROJECT PROPOSED TRANSMISSION LINE

ROUTE DEVELOPMENT

During the process of determining and evaluating possible route options, ENMAX considers impact factors such as residential, commercial, environmental, constructability, cost and visuals. ENMAX conducted a thorough routing and siting program that involved extensive data, information gathering, and evaluation.

After evaluation and assessment of several routes, ENMAX is proposing the route identified in the map enclosed in this package.

PROPOSED SCHEDULE

ENMAX plans to file the Facility Application with the AUC by the end of September 2017. Subject to approvals being granted, construction to begin by mid-2018 with a proposed in-service date of early 2021.

OPEN HOUSES

ENMAX representatives will be available at several open houses to share information, gather your input and address any questions or concerns you may have on the proposed transmission project. We hope to see you there.

DATE Monday, June 26, 2017 LOCATION Respsol Sport Centre, in the lounge, 2225 SE EVENING 4:00 - 8:00 pm

DATE Tuesday, June 27, 2017 LOCATION Best Western, in the Calgary Room, 1330 - 8 ST SW AFTERNOON 11:00 am - 3:00 pm EVENING 4:00 - 8:00 pm

DATE Thursday, June 29, 2017 LOCATION Sandman Hotel, in Great Room 3, 888 – 7 Avenue SW AFTERNOON 11:00 am - 3:00 pm EVENING 4:00 - 8:00 pm

COMMITMENT TO COMMUNITY

ENMAX is committed to being a responsible corporate neighbour in the community. This commitment includes providing timely and meaningful engagement with stakeholders about this project.

We have developed a public involvement program to provide opportunities for area residents, occupants and landowners to be informed about this proposal and to engage with ENMAX in dialogue from the planning phase through construction.

STAKEHOLDER NEWSLETTER | MAY 2017 DOWNTOWN CALGARY TRANSMISSION REINFORCEMENT PROJECT PROPOSED TRANSMISSION LINE

Photo courtesy of The City Calgary

ABOUT ENMAX CORPORATION MORE INFORMATION Your input is very valuable to us. We will work with you ENMAX, through its subsidiaries, makes, moves and sells electricity to ensure you get answers to your questions and your to residential, small business and large commercial customers and is concerns are understood. For more information about headquartered in Calgary, Alberta, with offices in . ENMAX the proposed substation upgrades, please contact: Power Corporation owns and operates transmission and distribution infrastructure in Calgary and ENMAX Energy Corporation owns diverse ENMAX POWER CORPORATION electricity generation facilities throughout the province. Since 2007, Phone: 403-514-1471 ENMAX has been named one of Alberta’s Top Employers. ENMAX Energy Email: [email protected] is currently the retailer of choice for both The City of Calgary and The City of Edmonton. Website: enmax.com/dctrp

ABOUT ALBERTA ELECTRIC SYSTEM OPERATOR (AESO) To learn more about the need for this project, please contact: The AESO is an independent, not-for-profit organization responsible for ALBERTA ELECTRIC SYSTEM OPERATOR the safe, reliable and economic planning and operation of the provincial transmission grid. For more information about why this project is needed, Phone: 1-888-866-2959 please refer to the AESO’s Need Overview at www.aeso.ca. If you have any Email: [email protected] questions or concerns about the need for this project you may contact the Website: aeso.ca AESO directly. You can also make your questions or concerns known to an ENMAX representative who will collect your personal information for the To learn more about the regulatory process, please purpose of addressing your questions and/or concerns to the AESO. This contact: process may include disclosure of your personal information to the AESO. ALBERTA UTILITIES COMMISSION Phone: (780) 427-4903 Email: [email protected] Website: auc.ab.ca

STAKEHOLDER NEWSLETTER | MAY 2017