Update to the Southern Transmission Reinforcement Proposed Development Area Transmission Development Information for Stakeholders

Why am I receiving this information? The Alberta Electric System Operator (AESO) advises you of a change to the potential development area Why am I receiving this information? for the proposed transmission line development from Goose Lake 103S substation to the Journault 260S substationThe Alberta approved Electric System as part Operator of the Southern(AESO) advises Alberta you Transmission of a change System to the potential Reinforcement development (SATR) area in for the proposed transmission line development from Goose Lake 103S substation to the Journault 260S Alberta Utilities Commission (AUC) Approval No. U2011-115. The AESO is providing this information to substation approved as part of the Transmission System Reinforcement (SATR) in Alberta landowners,Utilities Commission occupants, (AUC) residents Approval and No. other U2011-115. stakeholders The AESO in the is Fortproviding Macleod this informationand Glenwood to landowners, areas that mayoccupants, be affected residents by the and proposed other stakeholders transmission in thedevelopment. Fort Macleod and Glenwood planning areas that may be affected by the proposed transmission development. The AESO will file information with the AUC in summer 2012 regarding the need to change the potential developmentThe AESO will area file of information the proposed with development. the AUC in summer 2012 regarding the need to change the potential development area of the proposed development.

Background In December 2008, the AESO filed the SATR Needs Identification Document (SATR NID) with the AUC to addressBackground the need for transmission system reinforcement in southern Alberta. The transmission system in thisIn December region is 2008, at capacity the AESO and filed reinforcement the SATR Needsis primarily Identification needed Documentto integrate (SATR proposed NID) with wind the power AUC to developmentsaddress the need in forthe transmission area. The AESO system discussed reinforcement this inneed southern with Alberta.our stakeholders, The transmission including system potentially in this region is at capacity and reinforcement is primarily needed to integrate proposed wind power developments affected landowners, throughout 2008. The information provided by the AESO to stakeholders included in the area. The AESO discussed this need with our stakeholders, including potentially affected landowners, throughoutmaps of the 2008. potential The SATR information development provided area. by the A public AESO hearing to stakeholders was held includedto consider maps the NIDof the application potential SATRin June development 2009. area. A public hearing was held to consider the NID application in June 2009.

The AUC approved the SATR NID in September 2009 in Decision 2009-126 and further approved certain amendments inin Decision Decision 2011-102 2011-102 and and Approval Approval No. U2011-115No. U2011-115 (SATR (SATRNID Approval). NID Approval). For more information For more oninformation the need on for the SATR, need please for SATR, visit http://www.aeso.ca/transmission/16869.htmlplease visit http://www.aeso.ca/transmission/16869.html Why is a change to the potential development area required? The SATR NID Approval includes the development of a new 240 kV double circuit transmission line with oneWhy side is astrung change between to the Goose potential Lake 103Sdevelopment substation areaand Journault required? 260S substation (previously referred toThe as SATR “Sub NIDC”). Approval In the course includes of thedeveloping development its de oftailed a new engineering 240 kV double and circuitdesign transmission for this project, line withAltaLink one Managementside strung between Ltd. (AltaLink) Goose Lakeadvised 103S the substation AESO that and it hadJournault identified 260S line substation routing options (previously that layreferred outside to asof the"Sub original C"). As potential part of its development route determination area. The process, AESO AltaLink wishes toManagement advise stakeholders, Ltd. (AltaLink) including identified potentially areas affectedwith potential landowners, for low impactof the arearoutes where that extendthis transmission outside of thedevelopment AESO's original may be potential built. A development map showing area. the originalThe AESO and wishes revised to potential advise stakeholders, development includingareas is providedpotentially below. affected landowners, of the area where this transmission development may be built. A map showing the original and revised potential development areas is provided on the next page. MAP INSERT

Who is the AESO?

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Coaldale 785 Fort PEIGAN Macleod TIMBER LIMIT 513 5 36

508 BLOOD 3 RESERVE 845 PIIKANI 509 RESERVE 810 511 785 61

Brockett Stirling

Pincher 846 Creek Stand 52 Off Raymond 4 507 Magrath 844

6 Glenwood 505 5

505 506 504

Warner Hillspring

800 Milk River

5 62 4 2

5 BLOOD ososeded Development Area TIMBER 501 LIMIT ExExiissttiinng 6 Expansion United States First Nations Reserve

Who is the AESO? Alberta's transmission system, sometimes referred to as the Alberta Interconnected Electric System (AIES), is planned and operated by the AESO. The transmission system comprises the high-voltage lines, towers and equipment (generally 69 kV and above) that transmit electricity from generators to lower voltage systems that distribute electricity to cities, towns, rural areas and large industrial customers.

The AESO's role is to maintain safe, reliable and economic operation of the AIES. The AESO's planning responsibility includes determining the need for transmission system development and the manner in which that need is met. The AESO is also mandated to facilitate the interconnection of qualified market participants to the AIES. The AESO is regulated by the AUC and must apply to the AUC for approval of its needs identification document (NID).

How is AltaLink involved? AltaLink is the transmission facilities owner (TFO) in the Fort Macleod and Glenwood planning areas. While the AESO is responsible for identifying the need for transmission system development, AltaLink is responsible for detailed siting and routing, constructing, operating and maintaining the associated transmission facilities. The AESO has directed AltaLink to provide information to stakeholders regarding the proposed transmission line development and to file a facility proposal application with the AUC which will include a detailed description and location of the proposed transmission development.

Page 2 Spring 2012 Further Information The AESO appreciates your views on transmission system development and your comments are encouraged. If you have any questions or suggestions regarding the proposed changes to the potential development area, please contact:

Mark Sears-Gamache AESO Stakeholder Relations 1-888-866-2959 [email protected] 2500, 330 - 5th Avenue SW , Alberta T2P 0L4

The AESO will also be on hand to discuss the proposed changes at the following AltaLink open houses:

Hill Spring Magrath Stirling June 6 – 4-8 p.m. June 7 – 4-8 p.m. June 12 – 4-8 p.m. Hill Spring Community Centre Magrath Senior Citizens Drop In Centre Stirling Lions Club Community Centre 11 - 2nd Street South 32 - North 1st Street W 417 - 2nd Street

Cardston June 13 – 4-8 p.m. June 14 – 4-8 p.m. Tanner Centennial Seniors Centre Heritage Inn Hotel & Convention Centre 260 - 1st Street W 919 Waterton Ave

The AESO is committed to protecting your personal privacy in accordance with Alberta's Personal Information Protection Act. Any personal information collected by the AESO with regard to this project may be used to provide you with further information about the project, may be disclosed to the Alberta Utilities Commission (and as a result, may become public), and may also be disclosed to AltaLink as the legal owner of transmission facilities in your area. If you have any questions about how the AESO will use and disclose your personal information, please contact us at 1-888-866-2959 or at [email protected]

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