Alberta 2011 Annual Progress Report

LIST OF ANNUAL PROGRESS REPORTS TO WECC - 2011 NORTHWEST POWER POOL AREA

CONTENTS AND REMARKS Gen Transmissio No. Transfer Power Transient Post Transient One Request Copy Name of Project MW n Date of Capability Phas Tables Flow Stability Stability Lines of kV page e Maps Report From s

Edmonton Region 240 240 2013 .3 The objectives of this project are to address overloads on the Ata Rehman kV Line Upgrades – existing 240 kV lines in the Edmonton region (“debottlenecking”) (403) 539-2742 P786 and to increase transfer capability on the transmission paths out of (AESO) the area into northeast Alberta. The project consists of re-building, re-stringing and re-terminating the existing 240 kV lines in the Edmonton region and adding a phase shifting transformer at Dover substation near Fort McMurray. The need was approved by the Alberta Utilities Commission in February 2009, and facility applications are under review by the Alberta Utilities Commission.

9L66 240 kV Line 240 2010 .1 Relocate 240 kV line for coal mine expansion. “ Relocation – P943

Northwest Alberta 240 2011- .5 This project involves adding new transmission facilities listed ″ Transmission System 2012 below and is required to maintain reliability of supply and to meet Reinforcement load growth in the northwest Alberta. The need for the entire project has been approved by the provincial regulatory board. Brintnell to Wesley Creek 240 kV Line – This sub-project involves building a new 240 kV line (145 mi) with 2 x 477 MCM conductors per phase (summer/winter capacity of 550/702 MVA respectively). This new line was energized December 18, 2009. Wesley Creek to Hotchkiss 144 kV Line – This sub-project involves building a new 144 kV double circuit line (83 mi) with each circuit with 2 x 477 MCM conductors/phase (summer/winter capacity – 330/422 MVA) and is planned to be completed in 2011. Sulphur Point to High Level 144 kV Line – This sub-project involves building a new 144 kV single circuit line (65 mi) with 1 x 266.8 MCM conductors/phase (summer/winter capacity – 114/146 MVA) and is planned to be completed in 2012. Ring Creek Arcenceil (near Rainbow Lake) 144 kV Line – This sub-project involves building a new 144 kV single circuit line (70 mi) with 1 x 266.8 MCM conductors/phase (summer/winter capacity – 114/146 MVA) and is planned to be completed in 2012. Reactive Power Support in Northwest Alberta – This sub- project involves adding smaller cap banks at various locations to a total of 180 MVARs in northwest Alberta. In addition, two small SVCs will be added as follows: 30 MVAR @ Cranberry Lake; -5 + 30 MVAR at High Level. This sub-project is planned to be completed in 2012.

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Northwest Alberta 240 2011- .5 This project involves adding new transmission facilities listed ″ Transmission System 2012 below and is required to maintain reliability of supply and to meet Reinforcement load growth in the northwest Alberta. The need for the entire project has been approved by the provincial regulatory board. Brintnell to Wesley Creek 240 kV Line – This sub-project involves building a new 240 kV line (145 mi) with 2 x 477 MCM conductors per phase (summer/winter capacity of 550/702 MVA respectively). This new line was energized December 18, 2009. Wesley Creek to Hotchkiss 144 kV Line – This sub-project involves building a new 144 kV double circuit line (83 mi) with each circuit with 2 x 477 MCM conductors/phase (summer/winter capacity – 330/422 MVA) and is planned to be completed in 2011. Sulphur Point to High Level 144 kV Line – This sub-project involves building a new 144 kV single circuit line (65 mi) with 1 x 266.8 MCM conductors/phase (summer/winter capacity – 114/146 MVA) and is planned to be completed in 2012. Ring Creek Arcenceil (near Rainbow Lake) 144 kV Line – This sub-project involves building a new 144 kV single circuit line (70 mi) with 1 x 266.8 MCM conductors/phase (summer/winter capacity – 114/146 MVA) and is planned to be completed in 2012. Reactive Power Support in Northwest Alberta – This sub- project involves adding smaller cap banks at various locations to a total of 180 MVARs in northwest Alberta. In addition, two small SVCs will be added as follows: 30 MVAR @ Cranberry Lake; -5 + 30 MVAR at High Level. This sub-project is planned to be completed in 2012. 1

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CONTENTS AND REMARKS Gen Transmissi No. Transfer Power Transient Post Transient One Request Copy Name of Project MW on Date of Capabilit Phas Tables Flow Stability Stability of kV page y e Lines Maps Report From s

Dry Fork Station 390 6/2011 38 The Dry Fork Station is a 390 MW net coal fired station under Matthew Stoltz construction and scheduled to be in commercial operation in 701-557-5647 June of 2011. It is located at the Dry Fork Substation. (BEPC)

Wygen3 Generation 110 4/1/201 .2 The Wygen3 Generation Project consists of the addition of mine Wes Wingen Project 0 mouth coal-fired generation at the Wyodak generation complex 605-721-2268 In- near Gillette, Wyoming. The addition adds a 110 MW air-cooled (BHP) service steam unit at the site, and will interconnect to the Donkey & Creek 230 kV substation via 13.8:230 kV step-up transformer. comple The Wygen3 unit began construction in 2008 and was placed te into commercial operation in 2010.

Pumpkin Buttes – 230 2010 .2 The Pumpkin Buttes-Windstar 230 kV line consists of “ Windstar 230 kV In- approximately 60 miles of 1272 ACSR ‘Bittern’ conductor on Transmission Line service wood H-frame poles. The line was constructed to provide & needed Common Use System (CUS) transmission capacity, comple accommodate projected load growth, and increase Wyodak te area stability margins. The Pumpkin Buttes – Windstar line was placed into service in 2010.

Reno Junction 200 200 230 2010 .2 The Reno Junction Wind Farm is a proposed generation project “ MW Wind Farm consisting of one hundred thirty-four (134) GE 1.5 MW wind turbines. The generation project will interconnect to the Pumpkin Buttes 230 kV substation via a radial 230 kV line. The project has an executed LGIA that is under suspension. There are no changes to the status of this project from the 2010 Progress Report submittal.

Minnekhata 230 kV 230 2011 .2 The Minnekhata 230 kV substation is required to provide “ Substation additional 230:69 kV transformation capacity in the southern Black Hills. The station will tap the existing Westhill-Osage 230 kV line approximately 9.7 miles from the Westhill substation and will include a 70 MVA 230:69 kV transformer. Reliability analysis for this project was initially performed as part of the 2008 BHBE LTP Study. Construction on the substation is scheduled to begin in 2010 and is expected to be complete in 2011.

Baculite Mesa 400 1/1/201 .2 The Baculite Mesa Generation Project consists of the addition of “ Generation Project 2 approximately 400 MW of generation interconnected to the Baculite Mesa 115 kV substation. The substation will be located north-northwest of the Pueblo Memorial Airport in Pueblo County, CO. The project will add two 100 MW GE LMS-

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Dry Fork Station 390 6/2011 38 The Dry Fork Station is a 390 MW net coal fired station under Matthew Stoltz construction and scheduled to be in commercial operation in 701-557-5647 June of 2011. It is located at the Dry Fork Substation. (BEPC) 100 natural gas-fired combustion turbines at the site, as well as two additional 100 MW plants, each consisting of a pair of 40 MW LM6000 natural gas combustion turbines and one 20 MW steam turbine, operated in combined cycle mode. The plant will interconnect to the Baculite Mesa 115 kV substation via 13.8:115 kV step-up transformers. Construction began in 2010 and is expected to be in commercial operation by January 1, 2012. An additional 100 MW LMS-100 CT interconnection has been requested at this location, and System Impact Studies aer currently underway to identify any impacts to the local 115 kV transmission system. The in-service date for the additional 100 MW unit is January 1, 2013..

Weston Wind I 250.7 250 11/201 .2 The Weston Wind I Wind Farm is a proposed generation project “ MW Wind Farm 2 consisting of one hundred nine (109) Siemens SWT-2.3-93 2.3 MW wind turbines. The generation project will interconnect to a new substation on the Wyodak-Osage 230 kV line approximately 6 miles northwest of the existing Osage power plant in Weston County, Wyoming. The customer has completed the System Impact Study phase, and a Facilities Study Agreement has been tendered. The SIS report for this project is included to be considered the Comprehensive Progress Report.

Teckla-Osage 230 kV 230 2014 .2 The Teckla-Osage 230 kV line will consist of approximately 60 “ Transmission Line miles of 1272 ACSR ‘Bittern’ conductor on H-frame poles. The line will be constructed to provide needed Common Use System (CUS) transmission capacity, accommodate projected load growth, and increase Wyodak area stability margins. Reliability analysis for this project was initially performed as part of the 2008 BHBE LTP Study. The Teckla-Osage line construction was delayed and is now scheduled to begin in 2013, and is expected to be complete in 2014. The construction delay was the only change to this poroject from the 2010 Progress Report submittal.

St. Onge 230 kV 230 2014 .2 The St. Onge 230 kV substation is required to provide “ Substation additional 230:69 kV transformation capacity in the northern Black Hills. The station will tap the existing Lange-Lookout 230 kV line approximately 10 miles from the Lookout substation and will include a 150 MVA 230:69 kV transformer. Reliability

Dry Fork Station 390 6/2011 38 The Dry Fork Station is a 390 MW net coal fired station under Matthew Stoltz construction and scheduled to be in commercial operation in 701-557-5647 June of 2011. It is located at the Dry Fork Substation. (BEPC) analysis for this project was initially performed as part of the 2008 BHBE LTP Study. Construction on the substation has been delayed and is now scheduled to begin in 2013 and is expected to be complete in 2014. The one-year delay is the only change to this project from the 2010 Progress Report submittal.

Osage-Lange 230 kV 230 2015 .2 The Osage-Lange 230 kV line will consist of approximately 75 “ Transmission Line miles of 1272 ACSR ‘Bittern’ conductor on H-frame poles. The line will be constructed to provide needed Common Use System (CUS) transmission capacity and provide an additional path to the Rapid City load center. Reliability analysis for this project was initially performed as part of the 2008 BHBE LTP Study as specified in Attachment K to the BHBE OATT. The Osage-Lange line construction was delayed and is now scheduled to begin in 2013. The project is still expected to be complete in 2015. The delay in the construction start date is the only change to this project from the 2010 Progress Report submittal.

Dixon-Horseshoe 230 230 5/2012 .2 Add a 9-mile hybrid line from southwest Fort Collins, Colorado Jeremy kV Line to north Loveland, Colorado to be in-service May 2012. The Brownrigg project involves WAPA-RMR and TSGT facilities and will have no (970) 266-7979 regional impacts. The purpose of the project is to provide a (PRPA) second 230 kV source to the Loveland load-serving area.

Fordham-Fort St. 230 9/2011 .2 Add a 21-mile hybrid line from south Longmont, Colorado to “ Vrain 230 kV Line Platteville, Colorado to be in-service September 2011. The project involves PSCo, TSGT, and WAPA-RMR facilities and will have no regional impacts. The purpose of the project is to provide a second 230 kV source to the Longmont load-serving area.

Portner 230 kV 230 7/2010 .2 Add a 1-mile double-circuit underground 230 kV to sectionalize “ Substation In- the Harmony-Boyd 230 kV line in south Fort Collins, Colorado. Service The project has no regional impacts. The purpose of the & project is to provide a new load-serving delivery point to the Comple Fort Collins area. This project was completed October 2010. te

Laporte 230 kV 230 5/2012 .2 Reconfigure an existing 230/115 kV substation with a 230 kV “ Substation Expansion Post- breaker-and-a-half yard to connect four adjacent transmission

Dry Fork Station 390 6/2011 38 The Dry Fork Station is a 390 MW net coal fired station under Matthew Stoltz construction and scheduled to be in commercial operation in 701-557-5647 June of 2011. It is located at the Dry Fork Substation. (BEPC) poned lines (converting one from 115 to 230 kV) and two 230/115 kV autotransformers in Laporte, Colorado to be in-service May 2012. The project will have no regional impacts. The purpose of the project is to improve reliability in the northwest part of the Foothills Area system.

Chambers 230/115 230 2010 .1 This project includes the construction of approximately ten Thomas W. kV Interconnection In- miles of 230 kV transmission and a new 230/115 kV Green Project Service autotransformer and is required to accommodate new 303-571-7223 & generation. The project was placed in service in December (PSC) Comple 2010. te

Comanche Unit #3 750 345 5/2010 45 1200 9 9 8 ″ In- MVA 8 Service The project is to construct Comanche Unit 3, a new 750 MW & generator, and two Comanche – Daniels Park 345 kV Comple transmission lines. A comprehensive Progress report was te submitted February 23, 2006. The report was subsequently distributed to PCC and TSS. The transmission was placed in service in December 2009.

Midway-Waterton 345 345 5/2011 .2 This project consists of an 82-mile 345 kV transmission circuit “ kV Transmission between the Midway and Waterton substations. The project Project will improve local system reliability and is pursuant to Colorado Senate Bill 07-100 to facilitate potential generation resources in the state. It was originally reported as a means to accommodate the 500 MW Squirrel Creek generation project, but is now planned for other future generation in southern Colorado. The in-service date has been modified from the fall of 2010 to May 2011. A technical study report that can be considered to be a comprehensive progress report was included with the PSCo 2010 Annual Progress Report. The report was used as an exhibit to an application for a Certificate of Public Convenience and Necessity before the Colorado Public Utilities Commission.

Cedar Creek #2 250 Q2/201 .1 Planned wind farm to interconnect at Keenesburg 230 kV. “ Generation 1

Cedar Point Wind 250 Q4/201 .1 Planned wind farm to interconnect at Missile Site 230 kV. “

Dry Fork Station 390 6/2011 38 The Dry Fork Station is a 390 MW net coal fired station under Matthew Stoltz construction and scheduled to be in commercial operation in 701-557-5647 June of 2011. It is located at the Dry Fork Substation. (BEPC) 1

Pawnee – Smoky Hill 345 5/2013 .2 This project consists of constructing approximately 96 miles of “ 345 kV Transmission 345 kV transmission between the Pawnee and the Smoky Hill Project Substations. The project will improve local system reliability and is pursuant to Colorado Senate Bill 07-100 to facilitate potential generation resources in the state. The project is to accommodate additional generation in northeast Colorado and is scheduled to be in service by May 2013. A technical study report that can be considered to be a comprehensive progress report was included with the PSCo 2010 Annual Progress Report. The report was used as an exhibit to an application for a Certificate of Public Convenience and Necessity before the Colorado Public Utilities Commission.

San Luis Valley- 2013 .2 1000- This project is being developed jointly with Tri-State Generation “ Calumet-Comanche 1500 & Transmission. It consists of building double-circuit 230 kV Transmission Project MW transmission from the San Luis Valley Substation in south- central Colorado to a new Calumet Substation, near Walsenburg, Colorado, and then double-circuit 345 kV transmission from Calumet Substation to the Comanche Substation, near Pueblo, Colorado. The project will improve local system reliability and is pursuant to Colorado Senate Bill 07-100 to facilitate potential generation resources in the state. This project is expected to accommodate approximately 1000- 1500 MW of resources interconnecting at or near the San Luis Valley Substation and/or the Calumet Substation. The project was previously reported to be in service by 2013, but is now planned to be in service in 2016. A technical study report that can be considered to be a comprehensive progress report was included with the PSCo 2010 Annual Progress Report. The report was used as an exhibit to an application for a Certificate of Public Convenience and Necessity before the Colorado Public Utilities Commission. Project also included under TSGT report.

Comanche Unit #3 750 Q2/201 .1 Planned unit. “ 0 In- Service & Comple

Dry Fork Station 390 6/2011 38 The Dry Fork Station is a 390 MW net coal fired station under Matthew Stoltz construction and scheduled to be in commercial operation in 701-557-5647 June of 2011. It is located at the Dry Fork Substation. (BEPC) te

Lamar-Front Range 345 2017 .4 This project is being developed jointly with Black Hills Energy “ Transmission Project and Tri-State Generation & Transmission. It consists of building 345 kV transmission that would originate in the southeast Colorado, at or near the existing Lamar Substation. The project anticipates three basic sections of 345 kV transmission emanating from Lamar: a)Lamar to the existing Comanche Station, near Pueblo, CO; length would be approximately 145 miles. b)Lamar to the planned Missile Site Substation, near Deer Trail, CO. The transmission would also interconnect with the existing Burlington and Big Sandy substations; total length would be approximately 225 miles. c)Lamar to a new Vilas Substation in Baca County, CO; length would be approximately 60 miles. The project will improve local system reliability and is pursuant to Colorado Senate Bill 07-100 to facilitate potential generation resources in southeast CO and is planned to be in service in 2017.

Big Sandy-Lincoln- 230 Q4/201 .2 613 MVA Uprate of the existing 56 mile, 1272 ACSR, 230 kV line from the Mark Graham Midway 230 kV Line 1 50 degree C rating of 336 MVA to 100 degree C rating of 613 303-254-3517 Uprate MVA. Expected completion date is fourth quarter 2011. (TSGT)

Erie 230/115 kV 230/115 Q2/201 .1 250 MVA New transformer rating is 250 MVA. This is a joint project with “ Transformer 1 Western with an expected operating date of second quarter 2011.

Story-Erie 230x115 230 Q2/201 .2 613 MVA This is a joint project with Western. The existing Story-Beaver kV Double Circuit 1 Creek-Hoyt-Erie 115 kV line is being converted to double circuit Line 230 kV (~78 miles). The Story-Erie 230 kV circuit will have a rating of 613 MVA at 100 degrees C design temperature. The rating of the Beaver Creek-Erie 115 kV circuit will be 306 MVA. Construction began March 2008 with an expected operating date of second quarter 2011.

TOT3 Archer 345/230 Q4/201 25 300 MW 2 28 1 6 ″ Interconnection 3 1 Project (previously New 345/230 kV substation (called Arrow Substation) tapping known as the 300 the LRS-Story 345 kV line adjacent to Archer Substation. A 230

Dry Fork Station 390 6/2011 38 The Dry Fork Station is a 390 MW net coal fired station under Matthew Stoltz construction and scheduled to be in commercial operation in 701-557-5647 June of 2011. It is located at the Dry Fork Substation. (BEPC) MW Path 36 Upgrade) kV interconnection from Arrow to Archer and a new 10 mile 230 kV line to connect Arrow to Cheyenne. Planned in service date is fourth quarter 2013.

Airport-Weld 230 kV 230 6/2011 .2 613 MVA This new line will be 8 miles, consisting of 1272 ACSR with a “ Line Cancell 100 degrees C rating of 613 MVA. This will likely be a joint ed project with Western, and perhaps also PRPA and PSCO. This project has been cancelled.

Ault-Timberline 230 230 10/201 .2 613 MVA Extend the existing Ault-Timberline 230 kV line approximately “ kV Line Extension to 3 3 miles (in and out approximately 6 miles) to the new Carey Carey Substation Cancell Substation. The line will consist of 1272 ACSR with a 100 ed degrees C rating of 613 MVA. This could be a joint project with PSCO. This project has been cancelled.

San Luis Valley- 230/345 Q2/201 .3 1000- This project is being developed jointly between Xcel Energy “ Calumet-Comanche 5 1500 and Tri-State G&T. It consists of constructing high voltage Transmission Project MW transmission from the San Luis Valley Substation in south- central Colorado to a new Calumet Substation, located along the existing Comanche-Walsenburg 230 kV line, near Walsenburg, Colorado. From Calumet, new double circuit 345 kV line will be constructed north to Comanche Substation, in Pueblo, Colorado. Additionally, a new 230 kV line will be built from Calumet to Walsenburg. The project will improve local system performance and reliability, and will facilitate potential generation as part of Xcel Energy’s response to Colorado Senate Bill 07-100 which calls for development of transmission facilities to deliver power from renewable resource zones in Colorado. Thie project is planned to be in service in second quarter 2015.

Cheyenne Substation 230 Q2/201 .5 Construction of four-breaker 230 kV ring bus configuration and “ Stage 03 0 two 230/115 kV, 200 MVA transformers. Energized 2nd quarter In- 2010. Service & Comple te

Miracle Mile 230 Q2/201 .5 Installation of two 230/115 kV, 200 MVA power transformers, “ Substation Stage 03 0 and associated equipment. Installation of two 30 MVAR shunt

Dry Fork Station 390 6/2011 38 The Dry Fork Station is a 390 MW net coal fired station under Matthew Stoltz construction and scheduled to be in commercial operation in 701-557-5647 June of 2011. It is located at the Dry Fork Substation. (BEPC) reactors.

Erie-Hoyt 230 kV 230 Q3/201 .5 Rebuild existing Erie-Hoyt 115 kV transmission line with 230 kV “ Transmission Line 0 transmission line double circuit single pole steel. One circuit will be energized at 115 kV. Beaver Creek – Hoyt 230 kV transmission line is complete, Erie – Hoyt 230 kV transmission line is complete. The Story-Henry Lake section is energized at 230 kV; waiting on completion of the Erie 230 kV yard by Tri- State to fully energize at 230 kV..

Ault Substation Stage 230 Q4/201 .5 Construct a 230 kV line terminal into the existing Ault 230 kV “ 03 0 yard, including one 230 kV circuit breaker and three 230 kV disconnect switches.

Weld Substation 230 230/115 Q2/201 .4 Addition of a third 230/115 kV 150 MVA transformer. “ kV Additions 2

TransWest Express 600 kV 2016 3 3000 2 The TWE Project is a 600 kV HVDC bi-pole transmission line and David Smith Project HVDC associated terminal facilities extending approximately 725 (303) 299-1545 miles from south-central Wyoming to southeastern Nevada. TWE The TWE Project has a north-to-south Planned Rating of 3000 MW delivered to the TWE southern terminal. The WECC Regional Planning Project Review process was completed on June 3, 2008, for the TWE Project. The TWE Project entered Phase 2 of the WECC Project Rating Review Process on February 1, 2010.

Wyoming Colorado 345 2014 2 TOT3 2 WCI is an approximately 180-mile, 345 kV transmission line Bill Pascoe Intertie +900 between Laramie River Station in southeastern Wyoming and (406) 494-2075 MW Pawnee in northeastern Colorado. WCI has a Planned Rating WCI Consultant that will add 900 MW to the TOT3 (WECC Path 36) path rating. The WCI project is owned by Wyoming Colorado Intertie, LLC, a member of the LS Power Group of companies.

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Palo Verde – Delany 500 2013 .2 The project will increase the export/scheduling capability from Peter Krzykos 500 kV line the Palo Verde area to provide access to both solar and gas 602 250-1649 resources. This is a joint participation project with APS as the (APS) project manager. The initial plan of service for the project will be a 500 kV line between the Palo Verde Switchyard and Delany Switchyard. This line is approximately 15 miles.

Delany – Sun Valley 500 2014 .3 This project will include development of a new Sun Valley “ 500 kV line station in the north of Phoenix in the area of the CAP’s Hassayampa Pumping Station, and a 500 kV transmission line approximately 35 miles long connecting the new site with the Delany 500 kV high voltage yard. It also consists of the 500/230 kV transformer with associated 230 kV station at Sun Valley. This new line will be needed to serve projected need for electric energy in the Northwest part of the Phoenix metropolitan area. It will increase the import capability to the Phoenix metropolitan area as well as increase the export capability from the Palo Verde area. The Arizona Corporation Commission (ACC) approved APS’ preferred route for this new line. It is anticipated the line will be a joint participation project with APS, SRP, and the Central Arizona Project (CAP) with APS the project manager.

Morgan (TS9) – 500 2011 .2 This project will add import capability to the Phoenix ″ Pinnacle Peak 500kV In- Metropolitan area and strengthen the transmission system on line Service the east side of the Phoenix Metropolitan valley. This project & consists of approximately 26 miles of 500 kV single-circuit line Complet from the Morgan substation to a new 500 kV Pinnacle Peak e station near the existing 230 kV Pinnacle Peak station and will include 500/230 kV transformers at Pinnacle Peak. This project also consists of looping one of the Southern Navajo lines north of Westwing in and out of the Morgan 500 kV station and will include a 500/230 kV transformer at Morgan station. It is anticipated the line will be a joint participation project with APS and SRP with APS the project manager. (The TS9 Substation hs been renamed to the Morgan Substation.) This project was completed and line energized in November 2010.

Palo Verde (or 500 2014 .2 This project will provide transmission capacity and import ″ vicinity) – North Gila capability into the Yuma area required to supplement limited 500-kV line transmission and generation resources in the Yuma area. This project consists of approximately 115 miles of single-circuit 500kV line from the Palo Verde ( or vicinity ) substation to the existing North Gila 500 kV substation and will include a

500/230 kV transformer at North Gila. It is anticipated the line will be a joint participation project. The expected in-service date is 2014.

APS 230 kV Projects 230 2008- .6 Various 230 kV system upgrades that are designed to increase ″ 2010 load serving capability, voltage support and enhance reliability of APS’ transmission system performance will be reported to WECC in the document entitled ‘Summary of Significant Transmission Additions and Changes’. The reported system facility additions will not have a significant impact upon the WECC bulk interconnected transmission system performance and a Progress Report will not e made.. Morgan-Raceway-Avery-Scatter Wash (TS6)-Pinnacle Peak 230 kV line (in-service 2013) Sundance-Pinal Central 230 kV line (in-service 2014) Sun Valley-Trilby Wash 230 kV line (in-service 2014) North Gila-TS8 230 kV line (in-service 2014) Palm Valley-TS2-Trilby Wash 230 kV line (in-service 2015)

Sun Valley – Morgan 500 2016 .2 This project will add scheduling capability between the Palo “ (TS9) 500 kV line Verde hub and the Southern Navajo system near Westwing. This project consists of approximately 40 miles of 500 kV line from the Sun Valley substation to a new 500 kV Morgan station near the existing 230 kV Raceway station. It is anticipated the line will be a joint participation project with APS, SRP and CAP with APS the project manager. The expected in-service date is 2016. (The TS9 Substation has been renamed to the Morgan substation.)

Navajo Transmission 500 2016 1 1600 2 This project is the construction of a new 500 kV transmission Tom Johns Project Segment 1 line starting at the Four Corners 500 kV switching station and Sithe Global terminating at a switchyard south of the Navajo 500 kV 509-926-3485 switching station. As a result of this project, the nomogram for Path 22 will be eliminated and the two components of the path will be separated into Path 22A (Four Corners-Moenkopi and DREP-RME 500 kV) and Path 22B (Four Corners-Cholla #1 & #2 345 kV). Path 22A will have a non-simultaneous rating of 3190 MW and Path 22B will have a non-simultaneous rating of 1370 MW. Path 23 (Four Corners 500/345 kV) will have a rating of 1040 MW.

Great Basin 500 2014 12 +/- 2000 2 3 Evan Estes Transmission SWIP- MW 1 LS Power South Project Great Basin Transmission’s SWIP-South Project represents Development,

further development of the ONLine Project. Install 70% series LLC compensation on Robinson Summit-Harry Allen 500 kV line, 636-532-2200 35% at each end. Install two 600 MVA 345/345 kV Phase Shifting Transformers (+/- 48 degrees each) at Robinson Summit: one connected towards Falcon and the other connected towards Gonder. Construct an extending 500 kV circuit from NV Energy’s Harry Allen substation to SCE’s Eldorado substation (~60 miles), with 70% series compensation at Harry Allen. Plan of service also includes a +150 MVAR shunt capacitor at the Robinson Summit 345 kV bus, and a +400 MVAR SVD (4x100 MVAR steps) at the Robinson Summit 500 kV bus. Phase 2 Rating studies in progress, anticipated completion ~Q2 2011

Great Basin 500 2014 12 +/- 2000 2 3 “ Transmission SWIP- MW 1 North Project Great Basin Transmission’s SWIP-North Project consists of a new 500 kV line from Idaho Power’s Midpoint substation to a new proposed Robinson Summit substation near Ely, Nevada (~275 miles). Install 70% series compensation (for 245 mile line impedance) as follows: 35% at Thousand Springs (located !125 miles south of Midpoint) and 35% at Robinson Summit. Phase 2 Rating studies in progress, anticipated completion ~Q2 2011.

Harry Allen Combined 500 500 6/1//201 .1 The project is to interconnect a new 500 MW Combined-Cycle Edi von Engeln Cycle and 500 kV 1 generator to the Harry Allen 500 kV switchyard and construct a NV Energy Line triple bundled 1590-ACSR circuit on single circuit structures South from Harry Allen 500 kV switch yard to the new Harry Allen (775) 834-4456 Combined Cycle Generating Plant. NVE is currently performing Sub-Synchronous Resonance (SSR) assessment to identify possible adverse effects and required mitigations for this generating facility.

McDonald 230/138 kV 230/138 6/1/201 .1 NV Energy plans to add a new 336 MVA 230/138 kV ″ Additions 4 transformer at the existing McDonald substation. The existing Arden – Decatur 230 kV line will be folded into the new McDonald substation.

Equestrian 500/230 500/230 2014 .5 The Equestrian project is needed to deliver bulk power to Las “ kV Substation Cancelle Vegas off the Harry Allen to Mead 500 kV line and consists of d the following: Equestrian North 500/230 kV substation and Equestrian-Faulkner 230 kV line #2. The necessity of this project has been supplanted by better alternatives and this

project has been cancelled.

Brooks 230/138/12 230/138 2017 .1 The addition of a new 230 kV transmission line between Pecos “ kV Substation and and the future Brooks substation site along with folding in the Pecos – Brooks 230 138 kV sub-transmission between Leavitt and Gilmore kV Line substations into the Brooks substation will eliminate N-1 low voltage issues. .

Sunrise 500/230 kV 500/230 2018 .6 1 Transmission To increase import capability into the NEVP system, the Sunrise Substation Project taps the Harry Allen-Mead 500 kV transmission line with two 1500 MVA 500/230 kV transformers and Integrates the Sunrise 230 kV facility with existing 230 kV Nevada Power Company facilities

Northwest 500/230 500/230 6/1/201 .1 Install three 500/230 kV, single phase autotransformers with a ″ #2 Transformer 8 rating of 300/400/500 MVA at the existing Northwest Addition substation.

Sunrise 500/230 kV 500/230 6/1/202 .1 This is a second 500/230 transformer addition at Sunrise, which “ #2 Transformer 0 will fold in the existing Harry Allen – Mead 500 kV #1 line. Addition

Northern New Mexico 345 2019+ .8 The project consists of an estimated 71 miles of new 345 kV Tom Duane 345 kV Transmission transmission from a tap point on the existing San Juan to Ojo (PNM) Project delayed 345 kV line to the Rio Puerco station approximately 20 miles 505-241-4569 north and west of Albuquerque. The existing line would be tapped approximately 2/3 of the distance from San Juan. The project is expected to increase Path 48 transfer capability by 700 MW. The project has now been deferred outside of PNM’s 10-yr planning horizon due to the fact that near-term need for the magnitude of increased capacity on Path 48 that this project would add is not required during this timeframe. This timing will be reassessed as conditions change.

Expansion of the Rio 345 2011- .4 The project consists of expanding the Rio Puerco Substation by “ Puerco 345 kV 2014 looping in the existing BA-West Mesa 345 kV line and adding a Station 345/115 kV autotransformer (Phase 1) and looping in the San Juan-BA 345 kV line (Phase 2). Phase 1 of this project is currently scheduled to be in service in 2011. Phase 2 of this project is currently scheduled to be in service in 2014.

Pinal County 500 kV 500/230 2011- .5 1500 This project provides major support to SRP’s local transmission John Hernandez Projects (Southeast kV 2014 MW network and delivers bulk power from the Palo (602) 236-0968

Valley Project) Verde/Hassayampa hub generation to the Central Arizona, (SRP) Tucson area, and Southeast Phoenix Valley load. The preliminary technical study indicated the project can obtain an approximate total transfer capability (TTC) of 1,405 MW. The project consists of the following line segments: 1) Hassayampa-Pinal West. The construction of this first line segment from Hassayamampa to Pinal West was completed and has been in-service as of October 2008. 2) Pinal West- Pinal Central-Abel-Browning. SRP is in the process of designing and acquiring right-of-way for the individual segments that comprise this transmission line project and constructing the project in segments. The Abel Substation is a new intermediate point between Pinal Central and Browning. Both Pinal Central and Abel Substations are envisioned as interconnection points for 500 kV and 230 kV transmission lines to bolster the EHV system and power delivery to local load serving entities in Pinal County. The estimated in-service date for the Pinal West to Pinal Central segment and the Pinal Central Substation is 2014. The Pinal Central to Abel to Browning segment was placed in service in the fall of 2010 at 230 kV and will be energized at 500 kV in 2014.

Desert Basin-Pinal 230 2014 .2 This 230 kV transmission project is projected to be in service in “ Central 230 kV Line 2014. The project is envisioned to build approximately 21 miles of 230 kV line to connect the Desert Basin Power Plant and the Pinal Central Substation. This new 230 kV tie will eliminate the need for a Remedial Action Scheme (RAS) currently required in the event of a critical contingency outage at the Desert Basin Station. In addition, the line will provide SRP with increasing transmission capacity to supply load growth in the southeast valley.

Randolph-Abel- 230/69 2011 .1 This 230 kV transmission project is projected to be in service “ Dinosaur 230 kV Line for summer 2011. The project is to be constructed to support & Abel 230/69 kV the full output of the TransCanada Coolidge Generating Station. Transformer By 2011 Abel substation will be looped into the Randolph- Dinosaur 230 kV line. Abel substation will have its first 230/69 kV transformer constructed and energized by April 2011.

Randolph-Pinal 230 2014 .1 This 230 kV transmission project is projected to be in service by “ Central 230 kV Line 2014. The project is to be constructed to support a completed TransCanada Coolidge Generating Station.

Schrader-Abel 230 kV 230 2019 .1 This 230 kV transmission project is projected to be in service by “

Line 2019.

Kyrene 500/230 kV 500/230 4/2012 .1 A third Kyrene 500/230 kV transformer will be constructed and “ Transformer energized by April 2012. APS is participating with SRP on the transformer.

Rudd 230/69 kV 230/69 4/2013 .1 The first Rudd 230/69 kV transformer will be constructed and “ Transformer energized by April 2013.

Schrader 230/69 kV 230/69 4/2014 .1 A second Schrader 230/69 kV transformer will be constructed “ Transformer and energized by April 2014.

Other Joint SRP/APS 500 2011- .2 SRP and APS jointly plan to construct the following transmission “ Projects 2016 facilities: Palo Verde-Delany (Harquahala Junction) 500 kV Line (in- service date 2013) Delany (Harquahala Junction)-Sun Valley (TS5) 500 kV Line (in-service date remains 2014. Morgan(TS9)-Pinnacle Peak 500 kV Line (in-service date 2011). Palo Verde-North Gila 500 kV Line (in-service date remains 2014). Sun Valley (TS5)-Morgan (TS9) 500 kV Line (in-service date 2016).

Other SRP 115/230/3 2014 .2 RS26, formerly Fountain Hills Station-115 kV, 230 kV or 345 kV “ 115/230/345 kV 45 from Stewart Mountain, Goldfield or APS’ Cholla-Pinnacle Peak Transmission Projects 345 kV Line (in-service date moved beyond SRP’s 10 year plan). RS17 Loop-In (in-service date moved beyond SRP’s 10-year plan).

SunZia Southwest 500 12/2014 4 3000 2 1 Jim Hsu Transmission Project MW 1 (SWPG) The SunZia Southwest Transmission Project is a major new 500 (480) 838-1427 kV transmission project managed by SouthWestern Power Group (SWPG) that is envisioned to provide additional transmission interconnections and transmission capacity between central New Mexico and central Arizona. The project is currently envisioned to be comprised of two 500 kV lines from the proposed renewable resource energy zone in central New Mexico (referred to as SunZia East) to the proposed Pinal Central 500 kV Substation (to be operated by SRP) in central Arizona. Two intermediate electrical interconnections are

being examined. The first will be at a new 500 kV substation (refered to as SunZia South) to be located near the existing Luna 345 kV Substation in southwestern NM (operated by EPE). The second interconnection is at the proposed Willow 345 kV Substation (to be operated by TEP) in southeastern AZ. On 7/12/07, PCC accepted the SunZia Regional Planning Process Report as complete and on 7/27/09 the project was granted Phase II status and a planned rating of 3000 MW. The project is currently in Phase II of the WECC Three Phase Rating Process.

Pinal Central 500 2014 .2 TEP plans to construct a 500-kV line from the proposed Pinal Brandon Phan (previously Pinal Central Substation to TEP’s Tortolita Substation. The expected (TEP) South) – Tortolita 500 in-service date for this project is 2014. TEP conducted an open (520) 777-6753 kV Line season to solicit interest in participation in this project. A Memorandum of Agreement has been executed for cost sharing for study, siting, and environmental work among the project participants. TEP is leading the study, siting and environmental effort for the project participants.

Willow 345 kV 345 2015 .1 TEP plans to construct the Willow 345 kV switchyard to “ Switchyard accommodate a generator interconnection request. This switchyard will accommodate the lines to the generator and loop-in TEP’s Greenlee – Winchester 345 kV line. The scheduled in-service date has been delayed to 2015.

Tortolita-South 345 345 2020 .1 The project will tie two of TEP’s import points together. At this “ kV line time, the project is expected to be in-service in 2020 but the schedule is tentative. Initial studies are expected to begin soon.

Vail-South #2 345 kV 345 2020 .1 Schedule is tentative and subject to change following the ″ line completion of study work to be conducted by TEP. A Comprehensive Progress Report will be issued when design studies are complete.

Westwing – South #2 500 or 345 2020 .05 Schedule is tentative and subject to change following the ″ 345 or 500 kV Line or completion of study work to be conducted by TEP. A Pinal West – South Comprehensive Progress Report will be issued when design #2 345 or 500 kV studies are complete. Line

Tortolita – Winchester 500 2020 .05 This is a new 500 kV transmission line project. The schedule is ″ 500 kV Line tentative and subject to change following the completion of study work to be conducted by TEP.

Winchester – Vail #2 345 2020 .05 This is a second circuit between Winchester and Vail parallel to ″ 345 kV Line existing circuit. The schedule is tentative and subject to change following the completion of study work to be conducted by TEP.

Winchester – Vail #3 345 2020 .05 This is a third circuit between Winchester and Vail parallel to ″ 345 kV Line existing circuit. The schedule is tentative and subject to change following the completion of study work to be conducted by TEP.

Springerville – 345 2020 .05 The schedule for this project is tentative and subject to change ″ Greenlee #2 345 kV following the completion of study work to be conducted by TEP. line

Tortolita – North Loop 500/345 2020 .2 TEP plans to construct two EHV lines between its Tortolita and “ Project North Loop substations. There are three competing projects: 1) Tortolita-North Loop 345 kV #1 and #2; 2) Tortolita-North Loop 500 kV #1 and #2; and 3) Tortolita-North Loop 345 kV and Tortolita-Marana-North Loop 345 kV. The selected project will be dependent on the project participants and is tentatively planned for 2020. Preliminary studies have been conducted as part of the Southeast Arizona Transmission Study (SATS) group. Additional study efforts will be undertaken prior to submitting a comprehensive progress report for the selected project.

Vail – Irvington – 345 2020 .1 TEP plans to construct a 345 kV line between TEP’s Vail and “ South 345 kV Line Irvington substations and between TEP Irvington and South substations. The tentative in-service date is 2020. Preliminary studies have been conducted as part of the Southeast Arizona Transmission Study (SATS) group. Additional study efforts will be undertaken prior to submitting a comprehensive progress report for the project.

Gateway Project 345/230/1 delayed .2 500 20 60+ 30 60+ 0 ″ (South – Gateway 15 0 345 kV line) A comprehensive progress report was issued 2/25/05. New substation, Gateway, in Nogales, AZ to provide service to customers of Unisource Energy Services (UES) and to interconnect with Comision Federal de Electricidad (CFE). Two 345-kV lines will connect Gateway to TEP’s South Substation and two 230-kV lines will connect to CFE’s Santa Anna Substation in Sonora, Mexico. The UES 115-kV system will be extended from the Valencia Substation to Gateway and a

345/115-kV transformer will serve the UES load in the Nogales, AZ area. The planned capacity of this line is 500 MW following interconnection with CFE. The maximum transfer to CFE is expected to be 400 MW South. The submittal includes a system impact study dated April 2004. The project is delayed due to permitting issues. Studies for this project were completed in April 2004 and presented before the Southwest Area Transmission (SWAT) regional planning group in August 2004. Following this presentation, the report was distributed to TSS.

Stirling Mountain – 230 9/2012 .1 320 MVA Dale Broveak Northwest 1 (775) 727-5312 This project is 47 miles of 230 kV transmission. Project is VEA currently under construction, approximately 50% complete.

Stirling Mountain – 230/138 9/2012 .1 320 MVA This project is 25 miles of 230 kV transmission. 8 miles are - Vista completed, and the remaining 17 miles are under construction, approximately 50% complete.

Vista – Charleston 138 12/2013 .1 192 MVA This project is 12 miles of 138 kV transmission. -

Vista – Pahrump 230 9/2012 .1 320 MVA This project is 11 miles of 230 kV transmission. -

San Luis – Rio 604 Q1/2013 170 This project consists of a 604 MW two-on-one combined cycle Leonard York Colorado Project plant to be constructed one mile south of the Arizona (U.S.) / WAPA-DSW Mexico border. Interconnection will take place via two new 230 (602) 605-2797 kV lines from the plant to the existing 161 kV Gila station and on to the existing North Gila station in Yuma, AZ

of 399 Revised 05/18/11 LIST OF ANNUAL PROGRESS REPORTS TO WECC - 2011 CALIFORNIA-MEXICO POWER AREA

Canyon Power Project 194 12/201 1 A new generating facility to be located in the city of Anaheim Nam Nguyen 1 (County of Orange) will have a maximum net plant output of ANHM 194.1 MW. The project consists of four (4) GE LM6000 simple (714) 765-5122 cycle natural gas combustion turbines and interconnects to ANHM’s 69 kV electrical system. Planned operating date of first unit is July 2011 and the overall project completion expected by December of 2011.

Tecnologico 230 kV 200 230 3/2011 .2 A new SVC (-75 / +200 MVAr) will be connected at the Jose SVC MVAR Tecnologico 230 kV substation (20111 “TEK-230”) for local Santamaria voltage support and to increase reactive margin in the Valley CFE Area of the CFE Baja California system. 011 52 (686) 558-1541

El Centinela 230 kV 230 11/201 .1 A new substation “El Centinela” (20453 “CNT-230”) is planned “ Substation 1 to be built between buses 20111 (TEK-230) and 20112 (STB- 230).

Carranza 230 kV 230 11/201 .1 A new substation “Carranza” (20461 “CZA-161”) is planned to “ Substation 1 be built between buses 20153 (GOR-161) and 20147 (CTY-161).

Trans-Bay HVDC +/- 200 kV 4/2010 .1 400 MW Babcock & Brown is developing this 50-mile submarine HVDC Paul Cable Project HVDC Transmission Project. The project will utilize voltage source Didsayabutra Complete converter technology (+/- 150 Mvar at 400 MW loading) and CISO & in- connect between PG&E’s Pittsburg 230 kV Substation and (916)608-1281 service Potrero 115 kV Substation. It is expected that permitting will be completed by April 2007 and the project will then proceed into final design, materials procurement and construction. As of 03/08, construction has begun on both sides of the project. This project is being tested before it can be released for commercial operation. At this point, the expected in-service date of this project is April 2010.

Generation Projects 7684 5/1/08 1 The following are generation projects in the ISO generation “ – interconnection queue that the facility studies have been 11/30/1 completed and the interconnection agreements have been 4 executed: Devers Substation – 850 MW – 2010 Tesla Substation 230 kV bus E – 1156 MW – 11/30/14 El Segundo 220 kV bus – 630 MW – 6/1/13 Devers-Palo Verde 500 kV line near Blythe – 520 MW – 2010 McCall Substation – 300 MW – 3/31/13 Eastshore Substation – 361 MW – 6/1/12 Between Cottonwood and Vaca-Dixon – 715 MW – 2010 Walnut Substation – 501 MW – 1/3/13 Page 374 of 399 Revised 05/18/11 LIST OF ANNUAL PROGRESS REPORTS TO WECC - 2011 CALIFORNIA-MEXICO POWER AREA

Generation Projects 7684 5/1/08 1 The following are generation projects in the ISO generation “ – interconnection queue that the facility studies have been 11/30/1 completed and the interconnection agreements have been 4 executed: Devers Substation – 850 MW – 2010 Tesla Substation 230 kV bus E – 1156 MW – 11/30/14 El Segundo 220 kV bus – 630 MW – 6/1/13 Devers-Palo Verde 500 kV line near Blythe – 520 MW – 2010 McCall Substation – 300 MW – 3/31/13 Eastshore Substation – 361 MW – 6/1/12 Between Cottonwood and Vaca-Dixon – 715 MW – 2010 Walnut Substation – 501 MW – 1/3/13 Page 396 of 399 Revised 05/18/11 Attachment I

Member Systems reporting significant facilities* in the 2010 Annual Progress reports to WECC from which, as of May 18, 2011, no report has been received:

1. Sea Breeze 2. AESO

* Projects listed as “In service” will be removed from the next issue of this log. Attachment II

Member Systems previously reporting significant facilities* in the WECC Transmission Database from which, as of May 18, 2011, no report has been received:

1. Sea Breeze Pacific RTS Sea Breeze Pacific 2. Sea Breeze Pacific West Coast Cable Sea Breeze Pacific

* Projects listed as “In service” will be removed from the next issue of this log. Significant facilities* reported in the WECC Transmission Database as of October 20, 2010 which were not included in Annual Progress Reports submitted:

This will be updated on release of the 2010 Sig Add report.

* Projects listed as “In service” will be removed from the next issue of this log.