SRP Ten Year Transmission Plan

2018 SRP Ten Year Transmission Plan 2018-2027 Prepared for the Arizona Corporation Commission January 2018 Docket No. E-00000D-17-0001 Page1 Page1

Table of Contents 1. Introduction... 1 2. Planning Organizations... 2 2.1 Regional Planning Organizations... 2 2.1.1 Western Electricity Coordinating Council (WECC)... 2 2.1.2 WestConnect... 2 2.2 Subregional Planning Group... 3 2.2.1 Southwest Area Transmission (SWAT)... 3 3. Biennial Transmission Assessment (BTA) Order Requirements... 4 3.1 9th BTA Order Requirements... 4 3.2 Prior BTA Order Requirements... 4 4. SRP Ten Year Transmission Plan Study Work... 6 5. Changes from Previous Plan... 7 5.1 Projects Placed in Service in 2017... 7 5.2 Revised Projects... 7 5.3 New Projects... 7 5.4 Removed Projects... 7 5.5 Potential Projects... 7 6. Project Maps... 9 6.1 Figure 1 SRP 500kV System... 10 6.2 Figure 2 SRP 230kV System West... 11 6.3 Figure 3 SRP 230kV System East... 12 6.4 Figure 4 SRP 115kV System (Eastern Mining Area)... 13 7. Project Descriptions... 14 7.1 Browning Corbell 230kV & Santan Rogers 230kV Line Reconfiguration (2019)... 15 7.2 Coolidge Hayden 115kV Reroute (2020)... 16 7.3 SunZia Southwest Transmission 500kV Project (2021)... 17 7.4 Price Road Corridor (2021)... 18 7.5 Abel Pfister Ball 230kV (2021-TBD)... 19 7.6 Copper Crossing Abel 230kV (2023)... 20 7.7 Southeast Power Link (2024)... 21 7.8 Hassayampa Pinal West 500kV #2 Line (2024)... 22 7.9 Silver King New Oak Flat New Superior 230kV (2026)... 23 7.10 Superior Silver King 115kV Reroute (2027)... 24 8. Attachment... 25 8.1 Attachment 1 2018 Ten Year Plan Technical Study... 25 SRP Ten Year Transmission Plan 2018-2027 i

1. Introduction This report updates and replaces the Ten Year Transmission Plan of the Salt River Project Agricultural Improvement and Power District (SRP), submitted in January 2017 pursuant to A.R.S. Section 40-360.02 - Plans; filing; failure to comply; classification. The 2018-2027 plan describes planned transmission line projects of 115kV or higher that SRP may construct or participate in over the next ten years. SRP Ten Year Transmission Plan 2018-2027 Page 1 of 25

2. Planning Organizations SRP continues to be involved in regional and subregional planning organizations. SRP s primary goal in these various planning activities is to ensure that a reliable and economical transmission system is connected to energy sources. Participation also allows SRP to coordinate its transmission plans with the plans of the other transmission providers. 2.1 Regional Planning Organizations 2.1.1 Western Electricity Coordinating Council (WECC) WECC is a non-profit corporation approved by the Federal Energy Regulatory Commission (FERC) to serve as the Regional Entity tasked with assuring a reliable bulk electric system in the geographical area known as the Western Interconnection. SRP is an active participant in the WECC committees that develop and integrate new system and generation models, develop WECC-wide base cases, develop WECC reliability criteria, and coordinate planning methodologies. 2.1.2 WestConnect SRP participates in the regional transmission planning activities of WestConnect. WestConnect is comprised of utility companies and independent transmission developers with transmission assets or potential transmission projects in the western United States. Its members collaboratively assess stakeholder needs and develop cost-effective transmission enhancements. WestConnect is committed to coordinating its work with other regional and interregional industry efforts to ensure consistency within the Western Interconnection. SRP continues to be an active participant in the WestConnect regional transmission planning and cost allocation processes established by FERC Order No. 1000. In August 2016, the 5 th Circuit Court of Appeals vacated FERC s Compliance Orders on the WestConnect Order 1000 process. The WestConnect utilities continue to work through the regional transmission planning process while they wait for FERC to reassess the compliance orders. While SRP is not required to participate in the Order No. 1000 process, SRP recognizes the importance of maintaining a collaborative and cooperative transmission planning process in the Western Interconnection. The Order No. 1000 planning process began January 1, 2015 with an abbreviated, one-year planning cycle. The regular, biennial regional transmission planning process began January 1, 2016. The outcome of Order No. 1000 regional transmission planning is a regional transmission plan that selects regional transmission projects to meet identified reliability, economic, or public SRP Ten Year Transmission Plan 2018-2027 Page 2 of 25

policy transmission needs. The regional participants did not identify any transmission needs in the 2016 2017 Regional Transmission Plan. 1 2.2 Subregional Planning Group 2.2.1 Southwest Area Transmission (SWAT) The SWAT Subregional Planning Group addresses future transmission needs on a subregional (desert southwest) basis. SRP participates in SWAT activities to help meet obligations for the Arizona Corporation Commission (ACC) and the Ten Year Transmission Plan filing. SWAT disseminates its work publicly and coordinates its studies and data with other subregional planning groups and WestConnect. 1 WestConnect 2017 Regional Transmission Plan is available at: https://doc.westconnect.com/documents.aspx?nid=17160 SRP Ten Year Transmission Plan 2018-2027 Page 3 of 25

3. Biennial Transmission Assessment (BTA) Order Requirements 3.1 9th BTA Order Requirements On November 21, 2016, the ACC issued Decision No. 75817, which suspended the requirement from the 8 th BTA that required utilities to provide the anticipated load level range at which each transmission project may be needed. Consistent with the 8 th BTA, utilities must continue to describe whether each project is driven by load growth or reliability. Factors driving each of SRP s transmission projects may change over time as resource plans change. 3.2 Prior BTA Order Requirements The following sections highlight SRP s responses to ongoing activities related to prior BTA orders. As ordered by the ACC in its 7 th BTA decision, entities are required to notify parties requesting generation or transmission interconnections to the Bulk Electric System of the appropriate ACC filing requirements. SRP placed an advisory notice on SRP s OASIS page on March 19, 2013 to satisfy this requirement: http://www.oatioasis.com/srp/srpdocs/potential_additional_state_requirements.pd.pdf This notice continues to meet the requirements of the 7 th BTA that was further affirmed in the 8 th and 9 th BTAs. SRP does not take responsibility for any third-party interconnector s compliance with ACC requirements. The ACC s 6 th BTA order adopted several requirements that remain in force. The ongoing requirements include: a) Report relevant findings in future BTAs regarding compliance with transmission planning standards (e.g. TPL-001 through TPL-004) 2 from NERC/WECC reliability audits that have been finalized and filed with FERC. SRP was last audited on its compliance with NERC Standards TPL-001-0, TPL- 002-0, and TPL-003-0 in August 2013. The WECC Audit team determined that SRP is in compliance with these three Standards. The next audit of TPL-001-4 has not been scheduled. b) Identify planned transmission reconductor projects, transformer capacity upgrade projects, and reactive power compensation facility additions at 115kV and above in ten year plan filings. 2 NERC Standards TPL-001 through TPL-004 have been replaced with TPL-001-4. SRP Ten Year Transmission Plan 2018-2027 Page 4 of 25

SRP s planned transmission reconductor, transformer capacity upgrades, and reactive power compensation additions in this ten year period are shown below. In-service dates may change to reflect load changes in the local system. Reactive Devices SRP s planned reactive device addition and anticipated in-service year: 18 Ohm Series Reactors on Palo Verde Hassayampa 500kV Ties #1-3 (2020) Transformers SRP s planned transformer additions to existing stations to accommodate load growth and anticipated in-service year: Rudd 230/69kV Transformer (2022) Browning 230/69kV Transformer (2024) Reconductor SRP does not have any planned reconductor projects. c) Discuss the effects of distributed renewable generation and energy efficiency programs on future transmission needs in ten year plan filings. SRP includes the effects of energy efficiency programs and distributed generation (traditional and renewable) in its resource planning and transmission system models. Thus, each of the transmission projects identified in the Ten Year Transmission Plan includes the effects of energy efficiency and distributed generation. In addition, the 8 th BTA (Decision No. 74785, dated October 24, 2014) called for a technical study to analyze the effects of removing DG and EE. To comply with this order, SRP is analyzing the effects of DG and EE through a separate study that will be reported for the upcoming 10 th BTA. SRP Ten Year Transmission Plan 2018-2027 Page 5 of 25

4. SRP Ten Year Transmission Plan Study Work Attachment 1 contains the 2018 Ten Year Transmission Plan Technical Study. This study analyzed the reliability impacts of the projects identified in the Ten Year Transmission Plan. Study work for joint projects is covered by subregional planning groups. SRP Ten Year Transmission Plan 2018-2027 Page 6 of 25

5. Changes from Previous Plan The following changes are noted between the Ten Year Transmission Plan submitted in January 2017 and this submittal. The changes include project or substation names, in-service dates, projects now in service, and newly identified projects. 5.1 Projects Placed in Service in 2017 SRP s placed the following projects in service in 2017: 12 Ohm Series Reactors on Palo Verde Hassayampa 500kV Ties #1-3 5.2 Revised Projects Revised Project 2017 Plan 2018 Revision Price Road Corridor 2019 TBD 2021 TBD Southeast Power Link 2019 2024 TBD Mesa Technology Corridor Copper Crossing Abel 230kV 2021 2023 Superior Silver King 115kV Reroute 2017 2027 Southeast Power Link 5.3 New Projects SRP did not add any new projects. 5.4 Removed Projects SRP did not remove any projects. 5.5 Potential Projects The following projects were included in previous plans with TBD in-service dates and have not advanced in SRP s planning process. In order to provide further transparency, SRP will continue to reflect these and other projects under consideration that fall outside of the ten year planning window as Potential Projects in future filings. SRP Ten Year Transmission Plan 2018-2027 Page 7 of 25

Potential Project Eastern Mining Expansion Superior 230kV Loop-in Thunderstone Browning 230kV Silver King Knoll New Hayden 230kV New Hayden 115kV Loop-in RS25 Project RS26 Project Pinal Central Abel RS-20 500kV Palo Verde Saguaro 500kV Ball (RS17) 230kV Loop-in Pinnacle Peak Brandow 230kV Abel 500kV Substation Purpose Accommodate growing mining customer load in SRP s Eastern Mining Area. Provide adequate transmission capacity in the event of future load growth in SRP s eastern service territory. Provide additional transfer capability from the south and east to the north and central areas of SRP s service territory. Increase the transmission capacity to serve new customer load in SRP s eastern service territory. Increase the transmission capacity to serve new customer load in SRP s eastern service territory. Serve growing Salt River Pima Maricopa Indian Community load. Serve load growth in the Fountain Hills area and to relieve stress on the lower voltage system that serves the Fountain Hills/Rio Verde area. Deliver remote resources into the southeast portion of SRP s service territory. Increase the adequacy of the existing EHV transmission system and permit increased power delivery throughout the state. Serve customer load in the Gilbert/Queen Creek area. Provide adequate transmission capacity to accommodate SRP customer load. Provide adequate transmission capacity for future load growth. SRP Ten Year Transmission Plan 2018-2027 Page 8 of 25

6. Project Maps This section includes maps showing the general location of existing and future transmission projects. Substation locations and line routings depict an electrical connection only and do not reflect any assumed physical locations or routing. Separate maps are provided for the 500kV system (Figure 1), the 230kV System West (Figure 2), the 230kV System East (Figure 3), and the 115kV system (Figure 4). The 115kV map primarily covers the 115kV Eastern Mining Area of SRP s service territory; however, some 230kV projects are also included. SRP Ten Year Transmission Plan 2018-2027 Page 9 of 25

6.1 Figure 1 SRP 500kV System Substation locations and line routings depict an electrical connection only and do not reflect any assumed physical locations or routing. SRP Ten Year Transmission Plan 2018-2027 Page 10 of 25

6.2 Figure 2 SRP 230kV System West Substation locations and line routings depict an electrical connection only and do not reflect any assumed physical locations or routing. SRP Ten Year Transmission Plan 2018-2027 Page 11 of 25

6.3 Figure 3 SRP 230kV System East Substation locations and line routings depict an electrical connection only and do not reflect any assumed physical locations or routing. SRP Ten Year Transmission Plan 2018-2027 Page 12 of 25

6.4 Figure 4 SRP 115kV System (Eastern Mining Area) Substation locations and line routings depict an electrical connection only and do not reflect any assumed physical locations or routing. SRP Ten Year Transmission Plan 2018-2027 Page 13 of 25

7. Project Descriptions This section includes project details in accordance with the requirements of A.R.S. Section 40-360.02 - Plans; filing; failure to comply; classification. Each project is identified by name, estimated in-service date, sizing details, routing, purpose, and major milestone dates. SRP Ten Year Transmission Plan 2018-2027 Page 14 of 25

7.1 Browning Corbell 230kV & Santan Rogers 230kV Line Reconfiguration (2019) Size Browning Corbell Voltage 230kV 230kV Santan Rogers Capacity To be determined To be determined Point of Origin Browning 230kV Substation SEC 12, T1S, R7E Intermediate Point NA NA Point of Termination Corbell 230kV Substation SEC 10, T1S, R5E Santan 230kV Substation SEC 21, T1S, R6E Rogers 230kV Substation SEC 13, T1N, R5E Length Approximately 130 feet Approximately 70 feet Routing The Browning Corbell line reconfiguration will follow the current route of the Browning Santan and Santan Corbell 230kV lines. The Santan Rogers line reconfiguration will follow the current route of the Santan Thunderstone 230kV line. This project will use existing circuit positions on existing structures. Reconfiguration of these two lines will be done in tandem. Purpose To create a third 230kV circuit serving the Corbell 230/69kV substation and prevent the loss of the Corbell 69kV area in the event of multiple 230kV line outages. This is a reliability driven project and is not triggered by rising system load levels forecasted in the next ten years. Schedule Notes Right of Way / Property Acquisition NA Construction Start 2018 Estimated In-Service 2019 The in-service year for this project advanced from 2020 to 2019 to coincide with other 2019 projects that mitigate short circuit fault current issues at Kyrene 230kV. Together, the projects mitigate short circuit problems without causing any thermal overloads on the system. A CEC is not expected to be needed at this time. SRP Ten Year Transmission Plan 2018-2027 Page 15 of 25

7.2 Coolidge Hayden 115kV Reroute (2020) Size Voltage Capacity Point of Origin Intermediate Point Point of Termination Length Routing 115kV To be determined Coolidge 115kV Substation SEC 16, T1S, R13E None N/A this is a reroute of an intermediate portion of the line. SEC 16, T1S, R13E Approximately 1.5 miles The portion of the line that may be relocated begins about 0.5 miles northeast of the Coolidge substation and runs north along the Union Pacific Railroad until it crosses the Gila River where it turns northeast following a canal and drainage feature. The portion to be rerouted is 1.25 miles in length. The new line will be from 1.25 to 2.0 miles long. Purpose A short segment of the subject 115kV line is located on Gila River Indian Community (GRIC) land. SRP is negotiating an extension of the current land grant for the line. SRP may elect to move this portion of the line onto private land if negotiations with the GRIC are unsuccessful or if SRP determines it is in the best interest of its customers. Schedule Right of Way / Property Acquisition Notes 2019 Construction Start 2020 Estimated In-Service 2020 SRP plans to pursue a CEC for this project in 2018 if negotiations with the GRIC are unsuccessful. SRP will begin the relocation of the impacted portion of the line once a certificate is received. SRP Ten Year Transmission Plan 2018-2027 Page 16 of 25

7.3 SunZia Southwest Transmission 500kV Project (2021) Size Voltage Capacity Point of Origin Intermediate Point Point of Termination Length Routing Two single-circuit 500kV AC lines WECC Approved Rating of 3000MVA Central New Mexico Willow 500kV Substation Pinal Central 500kV Substation SEC 30, T6S, R8E 515 miles From Lincoln County area in central New Mexico to the Willow 500kV substation 15 miles north of Bowie, Arizona to Pinal Central 500kV substation in Coolidge, Arizona. Purpose SRP s interest in this project is to provide the opportunity to develop additional transmission from existing generation sources in eastern Arizona and western New Mexico to serve load in central Arizona. Schedule Notes Right of Way / Property Acquisition Construction Start Estimated In-Service 2021 In progress To be determined Southwestern Power Group is the project manager on the development of this project. SRP is a participant. SRP Ten Year Transmission Plan 2018-2027 Page 17 of 25

7.4 Price Road Corridor (2021) Size Voltage Capacity Point of Origin Intermediate Point Point of Termination Length Routing 230kV To be determined Knox 230kV Substation SEC 32, T1S, R4E None New Henshaw 230kV Substation SEC 7, T2S, R5E Approximately 7 miles The final line route was determined through the CEC process. The project consists of a new double circuit 230kV line from the existing Knox Substation to the new Henshaw Substation. Henshaw will be located near to the intersection of Price Road and Germann Road in Chandler. Purpose To serve growing industrial and commercial customer loads along the Price Road Corridor, adjacent to Price Road in Chandler. Schedule Notes Right of Way / Property Acquisition 2018-2019 Construction Start Mid 2019 Estimated In-Service 2021: Knox Henshaw 230kV Line 2021: Henshaw 230kV Substation SRP received a CEC for this project by unanimous approval by the Arizona Corporation Commission line siting committee on September 12, 2017 Case No.00175, Decision # 76371. The CEC expires in September 2027. SRP Ten Year Transmission Plan 2018-2027 Page 18 of 25

7.5 Abel Pfister Ball 230kV (2021-TBD) Size Voltage Capacity Point of Origin Intermediate Point Point of Termination Length Routing 230kV To be determined Santan Schrader 230kV Line (near existing Moody 69kV substation and future Ball (RS-17) 230kV substation) SEC 1, T2S, R6E New Pfister (RS-24) 230kV Substation SEC 25, T2S, R7E Abel 230kV Substation SEC 19, T3S, R9E Approximately 20 miles This project is a double circuit 230kV line that bisects and connects the existing Santan Schrader 230kV line #2 to Abel 230kV Substation. The new double circuit 230kV line will be routed generally south and east from a point on the Santan Schrader 230kV line near the existing Moody 69kV substation and future Ball (RS-17) 230kV substation to the new Pfister (RS-24) 230kV substation in the southeastern portion of the town of Queen Creek. From the Pfister 230kV substation, the 230kV line will continue south and east to the Abel 230kV substation. Purpose This project was originally proposed to serve long-term load growth in the southeast valley. Load growth remains a driver for this project. However, the current timeline reflects a nearterm reliability need driven by new generation resources connecting near Abel Substation. Schedule Notes Right of Way/ Property Acquisition 2013-2020 Construction Start 2019-2020 Estimated In-Service 2021: Abel Santan 230kV Line 2021: Abel Schrader 230kV Line TBD: Pfister 230kV Substation TBD: Ball 230kV Substation This project was formerly known as Abel Moody. SRP received a CEC for this project on December 23, 2009, Case No. 148, Decision # 71441. The CEC expires December 23, 2021. The Pfister 230kV and Ball 230kV substations in-service dates are TBD depending on load growth in the Queen Creek area. SRP Ten Year Transmission Plan 2018-2027 Page 19 of 25

7.6 Copper Crossing Abel 230kV (2023) Size Voltage Capacity Point of Origin Intermediate Point Point of Termination Length Routing 230kV To be determined New Copper Crossing Energy Center SEC 24, T3S, R8E NA Abel 230kV Substation SEC 19, T3S, R9E Less than 1 mile This project is a double circuit 230kV line to connect new generation units to Abel 230kV substation. Purpose To accommodate near term new generation resources connecting in the Abel area. This is a reliability driven project and is not triggered by rising system load levels forecasted in the next ten years. Schedule Right of Way / Property Acquisition NA Construction Start 2023-2024 Estimated In-Service 2023: Copper Crossing Energy Center Abel 230kV Line #1 2024: Copper Crossing Energy Center Abel 230kV Line #2 Notes If the installed generation capacity is over 925 MW, a new 230kV switchyard will need to be built near Abel Substation in order to limit the amount of generation loss from a single contingency. SRP Ten Year Transmission Plan 2018-2027 Page 20 of 25

7.7 Southeast Power Link (2024) Size Voltage Capacity Point of Origin Intermediate Point Intermediate Point Point of Termination Length Routing 230kV To be determined Section of Santan Browning 230kV Line SEC 9, T1S, R7E RS-31 230kV Substation TBD RS-32 230kV Substation (if needed) TBD Section of Abel Pfister Ball 230kV Line SEC 10, T2S, R7E TBD Several options are under consideration to accommodate potential southeast valley load growth in the City of Mesa and the Town of Queen Creek. The analysis indicates that adding one or two new 230kV substations and a connection between the existing Santan Browning corridor to the future Abel Pfister Ball corridor would provide the greatest benefit to the area. The location of the 230kV substations and any new lines will be determined by the public siting process and load growth in the area. Purpose To meet potential growing customer loads in the southeast valley. Schedule Notes Right of Way / Property Acquisition 2019 Construction Start 2022 Estimated In-Service 2024 SRP does not yet hold a CEC for this project but plans to begin pursuing one in 2018. Construction of the facilities will be dependent upon the load growth in this area. This project was formerly identified as the Mesa Technology Corridor. SRP Ten Year Transmission Plan 2018-2027 Page 21 of 25

7.8 Hassayampa Pinal West 500kV #2 Line (2024) Size Voltage Capacity Point of Origin Intermediate Point Point of Termination Length Routing 500kV TBD Hassayampa 500kV Switchyard SEC 15, T1S, R6W Jojoba 500kV Switchyard SEC 25, T2S, R4W Pinal West 500kV Switchyard SEC 18, T5S, R2E Approximately 51 miles South and east of the Hassayampa Switchyard along the existing Palo Verde Kyrene 500kV line to a point where the gas pipeline splits from the transmission line, then generally along the pipeline (except in the Maricopa County Mobile Planning Area) to the Pinal West 500kV switchyard. Purpose The Central Arizona Transmission System study identified system additions to provide access to new generation in western or central Arizona. This project is needed as a result of the EPA ruling on Section 111(d) of the Clean Air Act (October 23, 2015), establishing emission performance rates representing the best system of emission reduction. This project can accommodate increased access to existing and potentially new load growth; however, future load growth was not identified as a driver. This is a reliability driven project not triggered by system load forecasts within the next ten years. Schedule Notes Right of Way / Property Acquisition 2004 Construction Start 2023 Estimated In-Service 2024 The CEC for Case No. 124 was awarded in May 2004 (ACC Decision # 67012). The CEC expires May 24, 2024. The first of the two permitted transmission lines was placed in service in October 2008. SRP Ten Year Transmission Plan 2018-2027 Page 22 of 25

7.9 Silver King New Oak Flat New Superior 230kV (2026) Size Voltage Capacity Point of Origin Intermediate Point Point of Termination Length Routing 230kV To be determined Silver King 230kV Substation SEC 16, T1S, R13E New 230kV Substation near the existing Oak Flat 115kV Substation, tentatively named New Oak Flat Near SEC32, T1S, R13E (exact location not determined) New 230kV Substation near the existing Goldfield Silver King 230kV line, tentatively named New Superior Near SEC34, T1S, R12E (exact location not determined) Approximately 6.5 miles The alignment will closely follow the existing 115kV circuit connecting Silver King to Oak Flat. The line starts at the Silver King Receiving Station, heading south and then turning southwest into the New Oak Flat 230kV Substation. The alignment will then traverse to the west into the New Superior 230kV Substation. In addition, the existing Goldfield Silver King 230kV line will be looped into the New Superior 230kV Substation. The location of the New Oak Flat and the New Superior sites are still being determined. Purpose To serve growing customer loads at Oak Flat and Superior. Schedule Notes Right of Way / Property Acquisition N/A Construction Start 2024 Estimated In-Service 2026 SRP does not yet hold a CEC for this project. SRP will pursue a Certificate when required by load growth in this area. SRP Ten Year Transmission Plan 2018-2027 Page 23 of 25

7.10 Superior Silver King 115kV Reroute (2027) Size Voltage Capacity Point of Origin Intermediate Point Point of Termination Length Routing 115kV Approximately 165MVA Point on existing Superior Silver King 115kV Line SEC 34, T1S, R12E None Point on existing Superior Silver King 115kV Line SEC 26, T1S, R12E Approximately 1.25 miles The new alignment will traverse to the north and west of the historical line and adjacent to the existing Goldfield Silver King 230kV circuit. Purpose To move an existing 115kV line on a single Customer s private property to accommodate Customer s land use needs. This is a single customer driven and requested project and is not triggered by system load growth. Schedule Notes Right of Way / Property Acquisition None Construction Start 2027 Estimated In-Service 2027 SRP was granted a CEC for Case No. 166 on October 4, 2012 (Decision # 73551) which expired in 5 years (October 16, 2017). An extension to the CEC termination date was submitted in July 2017. If approved, the CEC will be extended through 2027. The actual timing of the 115kV line relocation is dependent upon the Customer s land use needs. SRP Ten Year Transmission Plan 2018-2027 Page 24 of 25

8. Attachment 8.1 Attachment 1 2018 Ten Year Transmission Plan Technical Study SRP Ten Year Transmission Plan 2018-2027 Page 25 of 25