Redacted Public Proposals for Current and Closed Windows

AEP proposes performing a sag study on the AEP-owned line section between Scottsville and Bremo 138 kV to identify and mitigate any clearance issues in order to operate at or above the identified line loadings.

This proposal incorporates construction of multiple transmission lines and substation expansions to provide a robust, expandable transmission solution to address the 2022 Open Window 3 violations. This proposal will also ensure the PJM transmission system can safely and reliably accommodate future load growth.

NOTE: The proposing entity has worked closely with other PJM TOs in developing a transmission solution and this proposal should be reviewed in conjunction with proposal 2022-W3-129 and proposal 2023-W3-660.

Subsequent to execution of the DEA for one or more of these projects, the proposing entity may file application with the FERC for award of the CWIP and abandonment transmission rate incentives that are typical for projects of this size.

North Delta - New Raphael - Waugh Chapel 500kV

New Pike 500/138 kV substation + SVC + Cap Banks, new Black Oak - Gore - Goose Creek 500 kV line, New Hunterstown-Doubs-Goose Creek 500 kV line, plus various modifications to existing lines and substations.

Proposal permitting and overhead costs are captured on component 10C2.

See attachment 1 for flowgate information.

This project serves to wreck/rebuild segment one of 230kV line 2054, demarcation point between Charlottesville Substation to Profitt D.P. using double-circuit capable 230 kV poles. The line will be rebuilt with 3-phase 2-768 ACSS Maumee Type 13 bundled conductor and two (2) DNO-11410 shield wire. Switches and line lead at Charlottesville substation will be upgraded to 4000A.

Upgrading line #2054, causes an overload on lines #233 and #291 under Summer Generator Deliverability study for the loss of line #553. This overload can happen by adding some new loads in Louisa area as well. By wrecking and rebuilding lines #233 and #291 using (2) 768.2 ACSS/TW (20/7) “MAUMEE” conductor with 3948A ampacity, 1573MVA, and upgrading the ratings of substation equipment at Charlottesville, Crozet, Barracks Rd, Hydraulic Rd and Dooms, the overload is mitigated.

AEP proposes rebuilding the line sections between Boxwood and Scottsville 138 kV in order to increase the emergency rating above the identified thermal overloads.

Wreck and rebuild line #2090 (Ladysmith CT to Fredericksburg) as a double circuit 230kV line using (2) 768.2 ACSS/TW (20/7) “MAUMEE” conductor with 3948A ampacity, 1573MVA. Only one circuit will be wired at this stage. Second circuit will be used for either rebuilding and conversion of line #47 or adding a new 230kV line if required. Upgrade circuit breaker leads, switches and line leads at Ladysmith CT and Fredericksburg, and upgrade circuit breakers at Fredericksburg.

New Gant 500/230 kV substation, New Hunterstown - Doubs - Gant 500 kV line, plus various modifications to existing lines and substations.

Proposal permitting and overhead costs are captured in Component 40X.

See attachment 1 for flowgate information.

North Delta-Northeast 230kV, reconductor Brandon Shore to Waugh Chapel

This proposal is a comprehensive package of all of Dominion Energy's solutions for the 500 kV violations identified under the 2027 Summer High Load Growth (HLG) Case scenario of PJM's Data Center Planning Initiative. The Package includes the following Projects:

• 1. Interregional Solution - Aspen-Doubs (Refer to PJM ID 2022-W3-516)
• 2. Regional Solution - 500 kV Wishing Star-North Anna Upgrade (Refer to PJM ID 2022-W3-711)
• 3. Data Center Alley Local solution - New 500 kV/230 kV Aspen-Golden & Golden-Mars lines (Refer to PJM ID 2022-W3-692)
• 4. Second 500 kV Line from Lexington to Dooms (Refer to PJM ID 2022-W3-923)
• 5. Line #541 (Front Royal to Morrisville) Rebuild (Refer to PJM ID 2022-W3-671)
• 6. Reactive Power VAR Reinforcements (Refer to PJM ID 2022-W3-231)

This proposal is a combination of multiple other solutions to deliver an overall complete solution. C

Combination of:

• PEBO 215A (2022-W3-948)
• WOP 1F (2022-W3-853)
• SOP 8E (2022-W3-663)
• Various brownfield components required to meet reliability needs

AEP proposes performing a sag study on the line sections between Boxwood and Scottsville 138 kV to identify and mitigate any clearance issues in order to operate above the identified line loadings.

Rebuild the double circuit 138kV line from Glen Lyn station to Peter Mountain station at roughly 3.6 miles. The current line from Glen Lyn to Peters Mountain is sag derated to 205 MVA in the Summer case. To mitigate the overload, the Summer emergency rating needs to be 214 MVA or above.

AEP proposes to establish a new 500/345 kV, 1500 MVA transformer and a new breaker string consisting of two new 500 kV circuit breakers, located in the Cloverdale 500 kV yard. A new 345 kV tie-line between the 500 kV yard and 345/138 kV yards will be required. In addition, a new 345 kV breaker string and two new 345 kV circuit breakers will be required in the 345/138 kV yard.

This project serves to wreck/rebuild segment one of 230kV line 2135, demarcation point between Holly Meade Junction (Str.339B) and Gordonsville using double-circuit capable 500/230 kV poles. The line will be rebuilt with 3-phase 2-768 ACSS Maumee Type 13 bundled conductor and two (2) DNO-11410 shield wire. Switches and line lead at HollyMead will be upgraded to 4000A.

New North Delta 500/23 kV substation, New North Delta - Conastone 500 kV line, plus various modifications to existing lines and substations

Proposal permitting and overhead costs are captured on component 26A.

See attachment 1 for flowgate information.

Hunterstown-New Green Valley 500kV

Install 230KV/500kV shunt cap banks (static devices) as well as STATCOMs (dynamic devices) and associated equipment to address the reactive power needs of the system

Sag study the 138kV circuit from Glen Lyn station to Peter Mountain station at roughly 3.6 miles. The current line from Glen Lyn to Peters Mountain is sag derated to 205 MVA in the Summer case. To mitigate the overload, the Summer emergency rating needs to be 214 MVA or above.

New Gant 500 kV substation, New Hunterstown - Doubs - Gant 500 kV line, plus various modifications to existing lines and substations.

Proposal permitting and overhead costs are captured in component 40X.

See attachment 1 for flowgate information.

New Woodside 500/138 kV substation + SVC + Cap Banks, new Black Oak - Woodside - Goose Creek 500 kV line, plus various modifications to existing substations

Proposal permitting and overhead costs are captured on component 10C2.

See attachment 1 for flowgate information.

Brambleton-Hinsons Ford Rd 500kV

This proposal has been designed to 1) bring the significant generation interconnected at or near PECO’s Peach Bottom substation through the BGE territory 2) direct the power flow around BGE’S territory toward High Ridge substation in the west and Riverside substation in the east to aid in sending power towards the new load areas and 3) provide reactive support in PEPCO with a new STATCOM at Brighton amongst other upgrades and 4) enhance the existing FirstEnergy, PEPCO and Dominion seam through a collaboratively developed Joint Proposal. In particular, the Joint Solution between PEPCO, Dominion, and FirstEnergy rebuilds the Doubs to Goose Creek corridor to allow for an additional 500kV line from Doubs to Goose Creek and an additional 230kV circuit from Dickerson Station H to Ed’s Ferry.  Exelon MidAtlantic has developed West Cooper Max, including the Joint Solution, to not only compliment Dominion’s and FirstEnergy’s proposals (PJM proposal ids 2022-W3-129 & 2022-W3-129, but the Exelon MidAtlantic, Dominion, and FirstEnergy proposals together are designed to address all the PJM identified flow-gate violations in the three collective zones. Notwithstanding the collaboration, the West Cooper Max proposal maximizes the use of Exelon MidAtlantic’s existing transmission right-of-way such that of the 120+ miles of new or rebuilt transmission facilities envisioned for proposal, there is less than 2 miles of new ROW needed. Essentially, 98.3% of the new or rebuilt transmission facilities within this proposal is within existing ROW. This new ROW, primarily in the PECO zone is adjacent to existing Exelon owned transmission lines and substations near Cooper and Peach Bottom. Separately, this option does come with one alternative approach for establishing three (3) 500kV paths from Peach Bottom area toward BGE footprint.

New Woodside 500/138 kV substation + SVC + Cap Banks, new Black Oak - Woodside - Gant 500 kV line, Gant 500 kV substation, plus various modifications to existing substations

Proposal permitting and overhead costs are captured on component 4CA.

See attachment 1 for flowgate information.

Construct a new Otter Creek 500 kV 3-breaker Switching Station and bring the Three Mile Island - Peach Bottom 500 kV line in and out of the new switching station. Construct a new 500 kV line from the new Otter Creek 500 kV Switching Station to the existing Conastone 500 kV Substation.

The muddy creek portion of PEBO 220 scope can be energized in 2027 to incrementally meet PJM reliability needs. See schedule for more information.

New 12-terminal 500/230kV Bartholow substation with 6-terminal 500kV and 6-terminal 230kV, two 500/230kV transformers, two cap banks, and SVC. Interconnected with 500kV Doubs, Conastone, Brighton double circuit, Goram, and interconnected with 230kV Mt. Airy, double circuit Conastone, double circuit Grisham, and Otter Creek. New 230kV double circuit Bartholow to Conastone transmission line, new 230kV double circuit Bartholow to Grisham transmission line, and new 230kV Bartholow to Otter Creek transmission line. New 500kV Bartholow to Goram 500kV transmission line. New 3-terminal 500/230kV Goram substation with one 500/230kV transformer, interconnected with 500kV TMI, Peach Bottom, and Bartholow substations, and interconnected with 230kV Otter Creek substation. New 230kV Goram to Otter Creek transmission line. New 8-terminal 230kV Grisham substation with two cap banks and SVC, interconnected with 230kV Nimbus, Buttermilk, Pacific, BECO, and double circuit Bartholow. New 6-terminal 500/230kV North Delta substation with two 500/230kV transformers, interconnected with 500kV Delta York, Peach Bottom, and Conastone, and interconnected with 230kV Cooper and double circuit Graceton. New 500kV North Delta to Conastone transmission line. New 230kV double circuit North Delta to Graceton transmission lines and new 230kV North Delta to Cooper transmission line. Upgrade limiting elements of lines connecting North Peach Bottom and South Peach Bottom 500kV to achieve required rating.

Proposal permitting and overhead costs are captured in Component 26A.

See attachment 1 for flowgate information.

AEP proposes to establish a new 500 kV breaker position for the low-side of the existing 765/500 kV transformer at Cloverdale Station. The new position will be between two new 500 kV circuit breakers located in a new breaker string, electrically converting the 500 kV yard to "double-bus double-breaker" configuration.

New Hunterstown - Doubs - Audobon - Goose Creek 500 kV line, New BAudobon 500/230 kV substation, New Beaumeade - Paragon/Nimbus DCT 230 kV, plus various modifications to existing lines and substations

Proposal permitting and overhead costs are captured on component 21B.

See attachment 1 for flowgate information.

New Muddy Creek 230 kV switchyard, New Muddy Creek - Conastone/Graceton 230 kV lines, New North Delta 500/230 kV substation, New North Delta - Conastone 500 kV line, New Hunterstown - Doubs - Goose Creek 500 kV line plus various modifications to existing lines and substations

Proposal permitting and overhead costs are captured on component 21B.

See attachment 1 for flowgate information.

AEP proposes rebuilding the 138 kV double circuit line section between Fieldale and Franklin Substations

Tie-line Impact Info: The proposal topology connects equipment owned by more than one Transmission Owner, in this case APS, BGE, MetEd, PenElec, PECO, PEPCO, and PPL (all PJM members).

This Proposed Solution (PS) is an enhanced version of Project 9A, which includes the Independence Energy Connection (IEC) Project. The PS consists of: (1) IEC West, which is comprised of approximately 29-miles of new double-circuit 230kV AC overhead transmission line between the existing Potomac Edison Ringgold Substation in Washington County, Maryland to a new Rice Substation in Franklin County, Pennsylvania; (2) reconfigured IEC East, is primarily comprised of adding 230kV AC overhead transmission lines between a new Furnace Run Substation in York County, Pennsylvania, and the existing BGE Conastone (via Baltimore County) and Graceton Substations in Harford County, Maryland; and (3) other incumbent work as described in the PS. The combination of these three elements provides a comprehensive solution for the current requirements in the area.

Four documents are attached to show the progress already made on this PS:

• - JOINT AMENDED APPLICATION OF TRANSOURCE PENNSYLVANIA LLC AND PPL ELECTRIC UTILITIES CORPORATION (Attachment 1)
• - MARYLAND ORDER APPROVING SETTLEMENT AND GRANTING CERTIFICATE OF PUBLIC CONVENIENCE AND NECESSITY AND WAIVERS (Attachment 2)
• - LETTER ORDER GRANTING GBE GOOD CAUSE WAIVER (Attachment 3)
• - MD ORDER GRANTING CPCN FOR RINGGOLD TO CATOCTIN UPGRADES (Attachment 4)

The PS will create new tie-lines between PENELEC (Area 226), METED (Area 227), and APS (Area 201), and also create new tie-lines between PECO (Area 230), METED (Area 227), PPL (Area 229), and BGE (Area 232).

Build a new 500 kV circuit between Aspen and Doubs - this project scope only accounts for construction up to the Doubs Interconnection Point, FirstEnergy/PEPCO will be responsible for building the remaining portion of the line to the Doubs substation. The Exelon proposals will be 2022-W3-660 and 2022-W3-344. The First Energy proposal (Potomac Edison Company) ID will be 2022-W3-837. 230kV Line #203 will be wrecked and rebuilt as a double circuit in the existing ROW to accommodate the new 500 kV line. Additionally, existing 500kV Line #514 will also be wrecked and rebuilt as a double circuit 500kV/230KV lines between Goose Creek/Pleasant View and the Doubs Interconnection Point. 230kV Line #2098 will share the double circuit between Pleasant View and Hamilton Substations, and the remaining portion will be built to accommodate a future 230 kV circuit. Substation equipment will be upgraded to accommodate impact of new lines and line modifications. Substation scope also includes overdutied breaker replacements at Pleasant View, Loudoun and Ox substations.

Install a 5% reactor at Opossom Creek on the Opossum Creek-Redeye 138 kV line and a 5% reactor at New London on the New London-Altavista 138 kV line.

New Muddy Creek 230 kV switchyard, New Muddy Creek - Conastone / Graceton 230 kV lines, New North Delta 500 kV switchyard, New North Delta - Conastone 500 kV line, plus various modifications to existing lines and substations.

Proposal permitting and overhead costs are captured in component 25B.

See attachment 1 for flowgate information.

AEP proposes performing a sag clearance study to increase the summer emergency rating above the reported loadings for the Fieldale-Thornton and Thornton-Franklin line sections. Preliminary review using existing LiDAR data for that line recommends replacement of ferrous clamp hardware at each structure.

A large scale set of projects that solve the growing congestion issues in the southern Pennsylvania/northern Virginia/Maryland/West Virginia area. The project involves strategic rebuilds, substation upgrades, and greenfield transmission lines that primarily follow existing corridor. This strategic use of existing corridor greatly reduces the risk of projects being delayed due to opposition.

New 10-terminal 500/230kV Bartholow substation with 4-terminal 500kV and 6-terminal 230kV, two 500/230kV transformers, two cap banks, and SVC. Interconnected with 500kV Doubs, Brighton, Goram, and interconnected with 230kV Mt. Airy, double circuit Conastone, double circuit Grisham, and Otter Creek. New 230kV double circuit Bartholow to Conastone transmission line, new 230kV double circuit Bartholow to Grisham transmission line, and new 230kV Bartholow to Otter Creek transmission line. New 500kV Bartholow to Goram 500kV transmission line. New 3-terminal 500/230kV Goram substation with one 500/230kV transformer, interconnected with 500kV TMI, Peach Bottom, and Bartholow substations, and interconnected with 230kV Otter Creek substation. New 230kV Goram to Otter Creek transmission line. New 8-terminal 230kV Grisham substation with two cap banks and SVC, interconnected with 230kV Nimbus, Buttermilk, Pacific, BECO, and double circuit Bartholow. New 6-terminal 500/230kV North Delta substation with two 500/230kV transformers, interconnected with 500kV Delta York, Peach Bottom, and Conastone, and interconnected with 230kV Cooper and double circuit Graceton. New 500kV North Delta to Conastone transmission line. New 230kV double circuit North Delta to Graceton transmission lines and new 230kV North Delta to Cooper transmission line. Upgrade limiting elements of lines connecting North Peach Bottom and South Peach Bottom 500kV to achieve required rating. Upgrade limiting elements of 500kV line between Conastone and Brighton to achieve required rating.

Proposal permitting and overhead costs are captured on component 26A.

See attachment 1 for flowgate information.

New Racefield 500kV switchyard, New Racefield - Front Royal 500 kV line, New Warrenton - Wheeler DCT 230 kV line, New North Anna - Lady Smith 230 kV line, plus various modifications to existing lines and substations

Proposal permitting and overhead costs are captured in Component 1B.

See attachment 1 for flowgate information.

This proposal is a combination of multiple other solutions to deliver an overall complete solution.

Combination of:

• PEBO 220 (2022-W3-385)
• WOP 1F (2022-W3-853)
• SOP 8E (2022-W3-663)

Various brownfield components required to meet reliability needs

This proposal focuses primarily on replacing overloaded assets within PECO, BGE, and PEPCO on an asset-by-asset basis (e.g. reconductoring existing lines, replacing terminal equipment, etc.). These upgrades will provide incremental transmission capacity throughout the Exelon MidAtlantic territory and each upgrade within this proposal can be additive to both Exelon MidAtlantic and non-Exelon MidAtlantic proposals that PJM may be considering. The Replacement Upgrades require no new right-of-way.

Construct a new 32-mile Juniata - Lewistown 230 kV # 2 line by utilizing the existing brownfield 69 kV line route between Juniata and Mifflintown, and then building a greenfield line from Mifflintown to Lewistown. Build a new 2 breaker bay in the double bus double breaker Juniata 230 kV yard (note that today Juniata 230 kV is in a radial bus design, but the Juniata double bus double breaker upgrade is an existing PPL Supplemental Project {S0945.1} separate from this proposal). Build a new 2 breaker bay in the existing double bus double breaker Lewistown 230 kV yard.

Rebuild the 7.5 mile long portion of the AEP-owned section of the Scottsville-Bremo 138 kV line.

New Muddy Creek 230 kV switchyard, New Muddy Creek - Conastone/Graceton 230 kV lines, New North Delta 500/230 kV substation, New North Delta - Conastone 500 kV line, plus various modifications to existing lines and substations

Proposal permitting and overhead costs are captured in Component 25B.

See attachment 1 for flowgate information.

Conastone-Doubs 500kV

New Woodside 500/138 kV substation + SVC + Cap Banks, New Gant 500/230 kV substation, New 502 Junction - Black Oak - Woodside - Gant 500 kV line, New 230 kV line from Gant - Farmwell, New Cochran Tap - Round Table 230 kV line, plus various modifications to existing lines and substations.

Proposal permitting and overhead costs are captured in Component 4CA.

See attachment 1 for flowgate information.

BGE and PEPCO portions of West Cooper Solution (Exelon-full solution).

New Racefield 500kV switchyard, New Racefield - Front Royal 500 kV line, New Warrenton - Rixlew 230 kV line, New Warrenton-Hourglass 230 kV line, New Mars - Ocean Court-Davis Drive 230 kV line, plus various modifications to existing lines and substations

Proposal permitting and overhead costs are captured on component 1B.

See attachment 1 for flowgate information.

This project addresses overloads on Line #541, identified under the Prelim 2028 RTEP cases for 2022W3 (the new Generator Deliverability as well as N-1 study), by rebuilding approximately 47 miles of the transmission line form Front Royal to Morrisville substation to current 500 kV standards. The new conductor will have a minimum normal summer rating of 4357 MVA. Substation equipment, at Morrisville and Front Royal, will be upgraded to support the new conductor rating.

New Woodside 500/138 kV substation + SVC + Cap Banks, new Black Oak - Woodside - Gant 500 kV line, Gant 500/230 kV substation, New 230 kV line from Gant - Farmwell, New Cochran Tap - Round Table 230 kV line, plus various modifications to existing substations.

Proposal permitting and overhead costs are captured on component 4CA.

See attachment 1 for flowgate information.

New Woodside 500/138 kV substation + SVC + Cap Banks, New Fort Martin - Black Oak - Woodside 500 kV line plus various modifications to existing substations.

Proposal permitting and overhead costs are captured in Component 10C2.

See attachment 1 for flowgate information.

Exelon is proposing a 230 mile, 500 kV AC / 400 kV DC high-voltage transmission line originating in Northern Virginia, crossing Maryland, traveling up the Delmarva Peninsula and terminating in southern New Jersey.

This proposal is a robust, holistic, and expandable solution to address the reliability needs in the Northern Virginia Data Center Alley (Local constraints). The proposal will include the following components:

• 1. Installing new double-circuit 500/230 kV lines from Golden substation to Mars substation, and from Aspen substation to Golden Substation.
• 2. Installing the second 500-230 kV, 1440 MVA transformer at Mars Substation.
• 3. Upgrading existing double-circuit 230 kV lines from Golden substation to Paragon Park substation (Lines # 2150 & 2081), as well as an existing single circuit 230 kV line from Paragon Park substation to Beco Substation (Line # 2207) to a minimum normal summer rating of 1573 MVA. Equipment at each substation will be upgraded to support the new conductor rating of 4000A.
• 4. Replacing overdutied breakers at Belmont, Beco, Beaumeade, Pleasant View, Shellhorn, and Discovery.

This project serves to wreck/rebuild segment one of 230kV line 2135, demarcation point between Holly Meade Junction (Str.339B) and Gordonsville using double-circuit capable 230 kV poles. The line will be rebuilt with 3-phase 2-768 ACSS Maumee Type 13 bundled conductor and two (2) DNO-11410 shield wire. Switches and line lead at HollyMead will be upgraded to 4000A.

This proposal is a comprehensive solution to add new 500 kV Transmission Lines from North Anna substation to Wishing Star Substation (North Anna-Spotsylvania-VintHill-Wishing Star). The proposal will include the following components:

• 1. Building a new single circuit 500 kV line parallel to existing line #573 from North Anna Substation to Spotsylvania Substation.
• 2. Wrecking and rebuilding both the 5-2 towers in the Morrisville-Loudoun-Brambleton corridor and free up space for adding one new single-500kV monopole within the same corridor. The new over-head 500kV lines will be from Spotsylvania to VintHill, and VintHill to Wishing Star in the existing ROW with current 500 kV Standards.
• 3. Uprating Line #535 from structure 389 (First Energy Demarcation Point) to the point joining Morrisville-Loudoun corridor to current 500 kV Standards.

New Pike 500/138 kV substation + SVC + Cap Banks, New Fort Martin - Black Oak - Pike 500 kV line plus various modifications to existing substations.

Proposal permitting and overhead costs are captured in component 10C2.

See attachment 1 for flowgate information.

New Bartholow 500 kV Switchyard, New Barnhart500 kV Switchyard, New 500 kV line from Barnhart -Bartholow - Goose Creek, plus various modifications to existing lines and substations.

All of the permitting costs and overhead costs for this proposal are captured in component 38A.

See attachment 1 for flowgate information.

Locks 230/115 kV transformer TX #7 gets overloaded under Gen Deliv in RTEP 2027 HG case. Therefore, this project replaces TX #7 with new three phase transformers that have a higher rating of 224 MVA. Lead lines at the 115 kV level will be upgraded to 2000 A.

500kV Greenfield line from Peach Bottom Station to Brandon Shores Station
500kV Greenfield line from Doubs Station to Peach Bottom Station
Reconductor 230kV Line from Brandon Shores Station to Waugh Chapel Station

New Racefield 500kV switchyard, New Racefield - Front Royal 500 kV line, New Warrenton - Wheeler DCT 230 kV line, plus various modifications to existing lines and substations.

Proposal permitting and overhead costs are captured in Component 1B.

See attachment 1 for flowgate information.

500kV Greenfield line from Peach Bottom to New Raphael Station, 500kV Greenfield line from New Raphael Station to Waugh Chapel, 500kV Greenfield line from Doubs Station to Peach Bottom Station, and a reconductor of Peach Bottom North to Peach Bottom South Tie #1 and #2

This proposal incorporates construction of multiple transmission lines and substation expansions to provide a robust, expandable transmission solution to address the 2022 Open Window 3 violations. This proposal will also ensure the PJM transmission system can safely and reliably accommodate future load growth.

NOTE: The proposing entity has worked closely with other transmission owners in developing a transmission solution and this proposal should be reviewed in conjunction with proposal 2022-W3-129 and proposal 2023-W3-660.

Subsequent to execution of the DEA for one or more of these projects, The proposing entity may file application with the FERC for award of the CWIP and abandonment transmission rate incentives that are typical for projects of this size.

New Woodside 500/138 kV substation + SVC + Cap Banks, new Black Oak - Woodside - Goose Creek 500 kV line, New Hunterstown-Doubs-Goose Creek 500 kV line, plus various modifications to existing lines and substations

Proposal permitting and overhead costs are captured on component 10C2.

See attachment 1 for flowgate information.

New Woodside 500/138 kV substation + SVC + Cap Banks, New Gant 500 kV substation, New 502 Junction - Black Oak - Woodside - Gant 500 kV line, plus various modifications to existing lines and substations.

Proposal permitting and overhead costs are captured in Component 4CA.

See attachment 1 for flowgate information.

New Woodside 500/138 kV substation + SVC + Cap Banks, New Gant 500 kV substation, New 502 Junction - Black Oak - Woodside - Gant 500 kV line, plus various modifications to existing lines and substations.

Proposal permitting and overhead costs are captured in Component 4CA.

See attachment 1 for flowgate information.

Rebuild the double circuit 138kV line from Leesville station to Str. 17-181 at roughly 5.1 miles. Rebuild the single circuit 138kV line from Str. 17-181 to Altavista station at roughly 3.4 miles. To mitigate outage constraints, the Leesville - Altavista 138kV line will be built in the clear. The Opossum Creek - Smith Mountain 138kV line will be 6 wired from Leesville station to Str. 17-181. To mitigate the overload, the Winter emergency rating needs to be 327 MVA.

Construct new Greenfield 500kV “Stork” station north of existing Brambleton station. Tap existing Goose Creek–Brambleton 500kV line. Construct 500kV 3-breaker ring bus.

Construct new Greenfield 500/230kV “Flys” station south of existing “Roundtable” station, 230kV double bus double breaker layout. Tap existing Roundtable-Lockridge 230kV. Tap future Roundtable-Barrister 230kV. Rebuild 0.32 mi Roundtable-Flys circuits 1 & 2.

Construct 5.04 miles single circuit underground 500kV line east of new Greenfield 500kV “Stork” 500kV station to the new Greenfield 500/230kV “Flys” station.

Incumbent rebuild 0.69 miles of Roundtable–Buttermilk 230kV. Incumbent rebuild 2.1 miles of Roundtable-Waxpool 230kV. Incumbent rebuild 0.88 miles of Waxpool-Farmwell 230kV. Incumbent upgrade (6) CBs at Roundtable to 5000A.

Incumbent voltage support to address voltage needs in the load area. These supports include an additional (2) 150 MVAr fixed shunt capacitor banks (or one 300 MVAr fixed) at Wishingstar 500 kV. An addition of (2) 150 MVAr fixed shunt capacitor banks (or one 300 MVAr fixed) at Goose Creek 500kV. Adding (1) 150MVAr fixed shunt capacitor bank to existing Cabin Run 230kV station. Adding (2) 150MVAr fixed shunt capacitor banks to existing Pacific 230kV station.

Add (2) 765kV breakers at Joshua Falls to create a 2-breaker ring with the transformer still connected off the bus. Remove CT and RTL limits to bring both 765kV lines up to the 3000A wavetrap rating. Construct new “Yeat” 765/500/230kV station near existing Bristers 500/230kV substation. This substation will have (10) 500kV breakers, (2) 765/500kV transformers, (2) 500/230kV transformers, (2) 230kV CB’s and (1) 765kV CB. Construct 135-mile single circuit 765kV greenfield line connecting Joshua Falls 765kV and new Greenfield Yeat 765kV stations. Cut in Bristers–Ox 500kV and Meadowbrook–Vint Hill 500kV lines into Yeat’s 500kV yard. AEP installs a new 12-mile dbl ckt BOLD (Breakthrough Overhead Line Design) 230kV line from Yeat–CloverHIll. Dominion installs a new 7.5-mile dbl ckt BOLD (Breakthrough Overhead Line Design) 230kV line from Warrenton–Wheeler. Dominion installs new 0.1% reactor at Vinthill on Vinthill–Morrisville. Dominion Install new 0.1% reactor at Vinthill on Vinthill–Loudoun 1. Dominion Rebuilds 1.7 miles 230kV line from Marsh Run–RemingtonCt as double circuit. Dominion replaces remote end equipment to bring rating up on 230kV line from Wheeler–Linton Tap–Atlantic. Dominion rebuilds the 0.23-mile line between Bristers 500kV and Yeat 500kV. Dominion installs (2) 230kV breakers at Wheeler substation.

Construct approximately 40.5-miles of a new 500 kV transmission line from Lexington to Dooms with current 500 kV standards.

The Muddy Creek portion of PEBO 215 can be energized in 2027 to incrementally resolve PJM reliability need.

New 12-terminal 500/230kV Bartholow substation with 6-terminal 500kV and 6-terminal 230kV, two 500/230kV transformers, two cap banks, and SVC. Interconnected with 500kV Doubs, Conastone, Brighton double circuit, Goram, and interconnected with 230kV Mt. Airy, double circuit Conastone, double circuit Grisham, and Otter Creek. New 230kV double circuit Bartholow to Conastone transmission line, new 230kV double circuit Bartholow to Grisham transmission line, and new 230kV Bartholow to Otter Creek transmission line. New 500kV Bartholow to Goram 500kV transmission line. New 3-terminal 500/230kV Goram substation with one 500/230kV transformer, interconnected with 500kV TMI, Peach Bottom, and Bartholow substations, and interconnected with 230kV Otter Creek substation. New 230kV Goram to Otter Creek transmission line. New 8-terminal 230kV Grisham substation with two cap banks and SVC, interconnected with 230kV Nimbus, Buttermilk, Pacific, BECO, and double circuit Bartholow. New 6-terminal 500/230kV North Delta substation with two 500/230kV transformers, interconnected with 500kV Delta York, Peach Bottom, and Conastone, and interconnected with 230kV Cooper and double circuit Graceton. New 500kV North Delta to Conastone transmission line. New 230kV double circuit North Delta to Graceton transmission lines and new 230kV North Delta to Cooper transmission line. Upgrade limiting elements of lines connecting North Peach Bottom and South Peach Bottom 500kV to achieve required rating. New 230kV double circuit Keeney to Waugh Chapel transmission line.

Proposal permitting and overhead costs are captured in component 26A.

See attachment 1 for flowgate infromation.

New Pike 500/138 kV substation + SVC + Cap Banks, new Black Oak- Pike - Goose Creek 500 kV line, plus various modifications to existing substations.

Proposal permitting and overhead costs are captured on component 10C2.

See attachment 1 for flowgate information.

500kV Greenfield line from Doubs Station to Peach Bottom Station Circuit #1.
500kV Greenfield line from Doubs Station to Peach Bottom Station Circuit #2.
Reconductor 500kV Line from Doubs Station to Goose Creek Station

This project serves to wreck/rebuild segment one of 230kV line 2054, demarcation point between Charlottesville Substation to Proffit D.P. using double-circuit capable 500/230 kV poles (the 500kV circuit will not be wired as part of this project). The line will be rebuilt with 3-phase 2-768 ACSS Maumee Type 13 bundled conductor and two (2) DNO-11410 shield wire. Switches and line lead at Charlottesville substation will be upgraded to 4000A.

Upgrading line #2054, causes an overload on lines #233 and #291 under Summer Generator Deliverability study for the loss of line #553. This overload can happen by adding some new loads in Louisa area as well. By wrecking and rebuilding lines #233 and #291 using (2) 768.2 ACSS/TW (20/7) “MAUMEE” conductor with 3948A ampacity, 1573MVA, and upgrading the ratings of substation equipment at Charlottesville, Crozet, Barracks Rd, Hydraulic Rd and Dooms, the overload is mitigated.

Construct new “Yeat” 500/230kV station near Bristers 500/230kV substation. This substation will have (10) 500kV breakers, (2) 500/230kV transformers, and (2) 230kV CBs. Cut in Bristers–Ox 500kV and Meadowbrook–Vint Hill 500kV lines into Yeat’s 500kV yard. The Proposing Entity installs a new 12-mile dbl ckt BOLD (Breakthrough Overhead Line Design) 230kV line from Yeat–Clover Hill. The Proposing Entity installs a new 7.5-mile dbl ckt BOLD (Breakthrough Overhead Line Design) 230kV line from Warrenton–Wheeler. Dominion to install new 0.1% reactor at Vint Hill on Vint Hill–Morrisville. Dominion to install new 0.1% reactor at Vint Hill on Vint Hill–Loudoun 1. Dominion rebuilds 1.7 miles 230kV line from Marsh Run–Remington Ct as double circuit. Dominion replaces remote end equipment to bring rating up on 230kV line from Wheeler–Linton Tap–Atlantic. Dominion rebuilds the 0.23-mile line between Bristers 500kV and Yeat 500kV. Dominion installs (2) 230kV breakers at Wheeler substation.