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Annual Progress Report for Planning Coordination NV Energy 2021 Annual Progress Report February 16, 2021 To: The WECC, Studies Subcommittee In accordance with WECC Progress Report Policies and Procedures, NV Energy is submitting 2021 Annual Progress Report, as presented below. NV Energy North Bordertown to California Sub 120 kV Project This project is comprised of a new 345/120 kV 280 MVA transformer at NVE’s Bordertown Substation and a 120 kV, 11-mile line from Bordertown to California substation. This project is expected to be in service by end of 2025. Multiple studies on the project have been performed by NVE indicating that no significant regional impact from these internal transmission facilities can be expected. West Tracy 345/120 kV Transformer This project is driven by expected load growth in the Reno/Tracy area. The project includes the construction of a new 120 kV switchyard and a new 345/120 kV 280 MVA transformer at the existing West Tracy substation. This project is planned to be in service in 2022. Multiple studies on the project have been performed by NVE indicating that no significant regional impact from this internal transmission facility can be expected. Dodge Flat Solar Energy Center NextEra Dodge Flat Solar PV project: Interconnection of 200 MW Solar PV generation and 50MW battery storage at Olinghouse 345 kV switching station folded into the 345kV Valmy – Tracy kV line #1. The proposed ISD is 12/2021. This was PUCN approved project in 2018. No regional effects or affected systems that are associated with this project have been identified by NVE. NV Energy is requesting a waiver of “Significant Impact” Status for this project. Battle Mountain Solar and Storage Company GV, Battle Mountain SP, LLC proposes to Interconnect a new 101MW Solar PV Plant to the existing Valmy-MariGold-Battle Mtn #120kV line. This project includes a 25MW storage. A new NV Energy owned 120kV POI switchyard Izzenhood switching station will be located west of existing NV Energy owned Battle Mountain 120kV switchyard. This was a PUCN approved project in 2018. The project is expected to be in service in 2021. No regional effects or affected systems that are associated with this project have been identified by NVE. NV Energy is requesting a waiver of “Significant Impact” Status for this project. Fish Springs Ranch Solar Next Era, Company HM executed LGIS to interconnect a 100MW solar PV generator with 25MW storage at Sierra’s 345kV Fort Sage substation with 100MW at POI. The planned in- service date is 12/2021. This point of interconnection is along NVE – BPA 345kV tie line. The phase shifter at Bordertown may be adjusted to import PV power into NV Energy system based on requirements. This was PUCN approved project in 2018. NV Energy requests waiver of “Significant Impact” status for this project. NV Energy South Apex Solar This Solar Partners’ project is a new 440MW solar PV plant proposed to interconnect to the NVE’s 230kV Crystal substation. The planned in-service date for this project is 11/2022. Several planning studies related to this interconnection had been performed including the interconnection to NVE’s system and within the framework of WATS addressing effects on other interconnections from neighboring queues (i.e., APS & LADWP). No regional effects or affected systems that are associated with this project have been identified. NV Energy is requesting a waiver of “Significant Impact” Status for this project. Copper Mountain Solar #5 The Copper Mountain Solar #5 project is a 250 MW Solar PV facility to be interconnected to the existing NVE’s Nevada Solar One 230 kV substation in Southern Nevada, with the planned in- service date of first quarter of 2021. This is a PUCN approved project in 2018. No regional effects or affected systems that are associated with this project have been identified. NV Energy is requesting a waiver of “Significant Impact” Status for this project. Harry Allen Solar (aka Dry Lake Solar ) at Harry Allen Company 139, Invenergy proposes to interconnect a 100 MW PV generation at Harry Allen 230kV with a proposed ISD of March, 2021. No regional effects or affected systems that are associated with this project have been identified. NV Energy is requesting a waiver of “Significant Impact” Status for this project. Techren Solar Interconnection Company 144- Techren Solar requested interconnection to NV Energy’s transmission system in Eldorado Valley at Nevada Solar One 230kV substation to accommodate a 300 MW solar PV generating plant. This addition is part of PUCN approved renewable energy from NV Energy’s IRP. The construction of project is complete and achieved commercial operation during end of 2021. No regional effects or affected systems that are associated with this project have been identified. NV Energy is requesting a waiver of “Significant Impact” Status for this project. Prospector Substation A new 230kV substation Prospector is proposed to serve a proposed load addition. This new substation is folded from Grand Teton-Harry Allen 230kV line. Planned ISD is 6/2021. Reid Gardner – Tortoise 230kV line #2 To increase reliability for Lincoln and Overton towns, a redundant second source is required from Reid Gardner to Tortoise which pushes on this project for a second 230kV line. Planned ISD is 8/2022. Arrow Canyon Solar Company 79/119 requests to interconnect 200MW of PV solar at 230kV Harry Allen substation and is located at Clark county, NV with a planned ISD of 06/2022. This project has been recently approved by PUCN as part of 1190MW of new Solar Energy with 590MW additional energy storage. No regional effects or affected systems that are associated with this project have been identified. NV Energy is requesting a waiver of “Significant Impact” Status for this project. Southern Big Horn Solar (previously called as Eagle Shadow Mountain solar) A new 300MW Solar PV project by 8minuteenergy, Company 156 desires to interconnect at Reid Gardner 230kV substation in Clark County with a planned ISD of 04/2021. This project has been approved by PUCN from NV Energy’s IRP in 2019. No regional effects or affected systems have been identified that are associated with this project. NV Energy requests a waiver of “significant Impact” status for this project. Gemini Solar 1 &2 Solar partners XI, LLC, Company 151 has proposed to interconnect a new 440MW solar PV plant to NV Energy’s 230kV Crystal substation with the installation of a new 230kV transmission line between 230kV Crystal and 230kV Gemini substation. Planned ISD is 1/2023. Second phase of Gemini Solar interconnection is at Crystal 230kV substation for a 250MW Solar PV plant. ISD 1/2023. This is one of the major projects approved by PUCN from NV Energy’s IRP, 2019. No regional effects or affected systems have been identified that are associated with this project. NV Energy requests a waiver of “significant Impact” status for this project. Apex-Crystal 525kV New line construction from Apex to Crystal 525kV with approximate ISD of 12/2023. This is a non-NVE project and the line will be owned by LADWP. Larson 138kV substation A new substation is proposed to accommodate load growth at Henderson area and increase reliability for residential and commercial area loads. Planned ISD 7/2021. Pecos 230/138kV Transformer A new 230/138kV 400 MVA transformer is proposed to accommodate for Large generator interconnections near Harry Allen. Planned ISD is 11/2022. Boulder Solar III This planned 128 MW Solar project which also includes a 58MW battery storage system will be in Clark county, NV in the Eldorado valley south of Boulder city and will be interconnected at 230kV NSO. It is being developed by 174 Power Global and KOMIPO America Inc. This is one of the approved projects by PUCN in November 2020. NV Energy requests a waiver of “significant Impact” status for this project. Chuckwalla Solar Project This is a 200MW solar PV coupled with 180MW 4-hour battery storage system and one of the PUCN approved projects in November 2020. The project will be located in Clark County, NV 25 miles northeast of Las Vegas within the Moapa River Indian Reservation. This solar project will be interconnected at Harry Allen 230kV system. NV Energy requests a waiver of “significant Impact” status for this project. Greenlink Nevada West (GLW) Greenlink West is a proposed 525kV series compensated line that would traverse from Harry Allen substation in North Las Vegas to Northwest Substation (30 miles) in northwest Las Vegas to Ft. Churchill Substation (320 miles) in Yerington Nevada parallel to the western border of Nevada. Project also includes a 45-mile 345 kV line from Ft. Churchill Substation to Mira Loma Substation and a 40-mile 345 kV line from Ft. Churchill Substation to Comstock Meadows Substation. NVE is working on permitting of the project while the full scope is pending approval from Public Utility Commission of Nevada. The proposed in-service date is 12/31/2026 NVE has performed several transmission planning studies indicating that GLW would strengthen the connection between the North & South, improve reliability and increase the import transmission capacity of the integrated system. NVE will also perform typical design studies for 525 kV facilities (EMTP, SSR, SSCI, etc.). No regional effects or affected systems have been identified that are associated with this project. NV Energy requests a waiver of “significant Impact” status for this project. Greenlink Nevada North (GLN) Greenlink North is a proposed 525kV series compensated line that would run east-to-west along a 235-mile path between Robinson Summit substation in Northeast Nevada and the Fort Churchill substation in western Nevada. Full permitting and land acquisition are pending approval from Public Utility Commission of Nevada.