O C T O B E R 2 4 , 2 0 1 9 | W E S T B O R O U G H , M A Regional System Plan Transmission Projects and Asset Condition October 2019 Update Planning Advisory Committee Meeting Brent Oberlin D I R E C T O R , T R A N S M I S S I O N P L A N N I N G ISO-NE PUBLIC
TABLE OF CONTENTS Slide Highlights 3 October 2019 Changes 4 – 12 Status of Major Transmission Projects 13 – 14 October Asset Condition Changes 15 – 25 Appendix 26 – 32 ISO-NE PUBLIC ISO-NE PUBLIC 2
Highlights of the RSP Project List Update • Major cost estimate changes that occurred between the June 2019 and October 2019 Project List (MA) Greater Boston – cost increase of $157 million for 8 projects due to actual construction bids coming in higher than estimated costs, lengthy and extensive permitting and restrictive permitting conditions (NH) Seacoast New Hampshire Solution – cost increase of $40 million for 3 projects in Madbury-Portsmouth area due to actual construction bids coming in higher than estimated costs, lengthy and extensive permitting and restrictive permitting conditions • New Projects: None • 3 Upgrades on the project list have been placed in-service since the March 2019 update: (MA) Greater Boston - 2 projects placed in-service (CT) Greater Hartford & Central Connecticut (GHCC) – 1 project placed in-service ISO-NE PUBLIC 3
October 2019 Changes No New Projects Project Cost Transmission System Upgrades Improvement/Need ID # (in millions $) ISO-NE PUBLIC 4
October 2019 Changes, cont. 3 Projects Placed In-Service and Corresponding Needs Project Cost Transmission System Upgrades Improvement/Need ID # (in millions $) Replace the normally open 19T breaker at Southington with a 3% series reactor between 1587 Southington Ring 1 and Southington Ring 2 and 8.7 Resolve thermal overloads associated substation upgrades (Connecticut) GHCC 69 kV Line reconductoring of W-23W Woodside- Increase load serving capability of the Western 1327 Northboro Rd 7.1 Suburbs of Boston (Massachusetts) Greater Boston – Western Suburbs 115 kV Line reconductoring of F-158S Maplewood - 1550 Everett 6.9 Increase load serving capability in Greater Boston (Massachusetts) Greater Boston - North ISO-NE PUBLIC 5
October 2019 Changes, cont. Cost Estimate Comparisons of Reliability Projects June 2019 vs. October 2019 Update (1) As of Jun 2019 As of Oct 2019 Plan Change in Plan Update Update Plan Estimate (in millions $) (in millions $) (in millions $) MAJOR PROJECTS Greater Hartford & Central Connecticut (GHCC) 307 307 0 Southeast Massachusetts/Rhode Island Reliability Project 327 325 -2 Pittsfield/Greenfield Project 179 179 0 Greater Boston - North, South, Central, Western Suburbs 832 989 157 New Hampshire Solution - Southern, Central, Seacoast, Northern 328 369 41 Southwest Connecticut (SWCT) 399 399 0 SUBTOTAL (2) 2372 2568 196 9891 9900 9 OTHER PROJECTS NEW PROJECTS 0 0 PROJECTS WHOSE COST ESTIMATES WERE PREVIOUSLY REPORTED AS TO BE DETERMINED (TBD) TOTAL (2) 12263 12468 205 Minus 'in-service' -10915 -10939 Aggregate estimate of active projects in the Plan (2) 1348 1529 (1) Transmission Owners provided all estimated costs, which may not meet the guidelines described in Planning Procedure 4, Attachment D (2) May not sum exactly due to rounding (3) The cost estimates for projects in the "Major Projects" category are moved to the "Other Projects" category once they are fully completed. ISO-NE PUBLIC 6
October 2019 Changes, cont. Investment of New England Transmission Reliability Projects by Status through 2023 $1,000 $900 Proposed Planned $800 Under Construction In-Service $700 20 Note: Future total $ are shown at the $600 Cost in millions end of the project. Totals do not reflect or show phasing in over time or the depreciation of prior projects. $500 Total costs are associated with the 3 year projects are placed in-service as $400 reported in the Project List. 30 $300 17 $200 15 $100 5 7 11 1 $0 2018 2019 2020 2021 2022 2023 Year Note: Numbers shown represent project quantities ISO-NE PUBLIC 7
October 2019 Changes, cont. Cumulative Investment of New England Transmission Reliability Projects through 2027 $13,500 $13,000 $12,469 $12,469 $12,469 $12,469 $12,469 $12,384 $12,469 $12,500 $11,843 $12,384 $12,000 $12,406 $12,406 $12,406 $12,406 $12,406 $12,406 $11,500 $11,051 $11,843 $10,940 $11,051 $11,000 $10,500 $10,000 $9,500 $9,000 $8,500 $8,000 Cost in millions $7,500 $7,000 $6,500 $6,000 $5,500 $5,000 $4,500 $4,000 Note: Future total $ are shown at the end of the $3,500 In-Service RSP (IS) project. Totals do not reflect or show phasing in over $3,000 time or the depreciation of prior projects. Total costs UC+PL+PR $2,500 are associated with the year projects are placed in- $2,000 UC+PL service as reported in the Project List. $1,500 $1,000 $500 $16 $0 2002 Oct-19 Dec-19 2020 2021 2022 2023 2024 2025 2026 2027 Year Note: UC – Under Construction, PL – Planned, PR – Proposed ISO-NE PUBLIC 8
October 2019 Changes, cont. Reliability Project Counts and Aggregated Cost Estimates by Project Stage with Applied Accuracy Ranges (1) Component / Estimated Range Project Stage Project / Plan Estimate Range Costs Minimum Maximum Count (2) (Status) Minimum Maximum ($millions) ($millions) 25% (3) Proposed 1 -25% 63 47 78 Planned 33 -25% 25% 438 328 547 Under Construction 30 -10% 10% 1028 925 1131 Total Plan (excluding (5) Concept) 64 1529 1301 1757 (4) Concept 0 0 In-Service 3 -10% 10% 23 21 25 Cancelled (1) All costs provided by Transmission Owners. The costs in the table reflect all projected in-service dates (2) Efforts need to be made to describe projects on a more consistent basis (3) All estimates may not yet be at this level of accuracy; many estimates may be -25%/+50% (4) Not included here are the costs of reliability projects for which no estimates have been provided. Estimates for these projects are noted as TBD in the Project Listing and are only Concept Projects. (5) May not add up due to rounding. ISO-NE PUBLIC 9
October 2019 Changes, cont. Project Cost Estimate Tolerances by Status and Year in Millions $ PROPOSED 100 75 50 25 0 2019 2020 2021 2022 2023 +25% 78 Estimate 63 -25% 47 Note: Future total $ are shown at the end of the project. Totals do not reflect or show phasing in over time or the depreciation of prior projects. Total costs are associated with the year projects are placed in- service as reported in the Project List. ISO-NE PUBLIC 10
October 2019 Changes, cont. Project Cost Estimate Tolerances by Status and Year in Millions $ PLANNED 400 300 200 100 0 2019 2020 2021 2022 2023 +25% 97 422 28 Estimate 78 338 23 -25% 58 253 17 Note: Future total $ are shown at the end of the project. Totals do not reflect or show phasing in over time or the depreciation of prior projects. Total costs are associated with the year projects are placed in-service as reported in the Project List. ISO-NE PUBLIC 11
October 2019 Changes, cont. Project Cost Estimate Tolerances by Status and Year in Millions $ UNDER CONSTRUCTION 800 600 400 200 0 2019 2020 2021 2022 2023 +10% 121 786 224 Estimate 110 715 203 -10% 99 643 183 Note: Future total $ are shown at the end of the project. Totals do not reflect or show phasing in over time or the depreciation of prior projects. Total costs are associated with the year projects are placed in-service as reported in the Project List. ISO-NE PUBLIC 12
Status of Major Transmission Projects PPA TCA Construction Approved Partial 2/11/16, Project completion Pittsfield/Greenfield Project 12/12, 01/16, 05/16 7/17/17, 2/15/19 2014-2020 Complete 7/16/15, Approved Project completion Southwest Connecticut (SWCT) 4/15/16, 4/15 2013-2021 5/13/16, 1/3/18, 2/15/19 Approved Project completion Southeast MA/RI Reliability TCA Submitted 5/17, 4/18 2017-2021 Approved Group 1 Project completion Central/Western MA Reinforcements 12/07, 3/11 2/29/2012 2009-2022 Greater Boston – North, South, Central and Approved Project completion TCA Submitted Suburbs 4/15, 5/15, 6/16 2013-2021 ISO-NE PUBLIC 13
Status of Major Transmission Projects, cont. PPA TCA Construction Seacoast 11/5/15 New Hampshire Solution – Western, Central, Approved Southern 1/7/16 Project completion Southern and Seacoast 3/13 Western 12/17/15 2013-2020 Central 11/25/15 Approved Project completion Greater Hartford & Central Connecticut (GHCC) TCA Submitted 4/15 2015-2020 ISO-NE PUBLIC 14
October 2019 Asset Condition 34 New Projects Project Cost Transmission System Upgrades ID # (in millions $) 345 kV Structure Replacement Projects - Line 310 164 19.9 (Connecticut) 345 kV Structure Replacement Projects - Line 321 165 6.5 (Connecticut) 345 kV Structure Replacement Projects - Line 330 166 17.1 (Connecticut) 345 kV Structure Replacement Projects - Line 348 167 19.4 (Connecticut) 345 kV Structure Replacement Projects - Line 352 168 12.5 (Connecticut) ISO-NE PUBLIC 15
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