ATC Year Assessment Network Project List. MTEP Cost Reason for Change since Previous System Addition

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1 TC ssessment Network Project List Sherman Street SS, DIC - Replace High Side Circuit Switcher 208*** 208 T-D Interconnection Proposed targeted Wittenberg SS, DIC - Replace Transformer 208*** 208 T-D Interconnection Proposed targeted Baraboo SS, Bus Uprate and RTU Replacement 208*** T-D Interconnection Proposed targeted Darlington SS, DIC - Replace Transformer and Construct New Control House 208*** T-D Interconnection Proposed targeted Oak St SS, DIC - Replace Transformer 208*** T-D Interconnection Proposed targeted Berryville SS, DIC - dd 2nd Transformer 208*** T-D Interconnection Proposed targeted Distribution Interconnection Current Cycle 208*** 208 Various T-D Interconnection Proposed targeted Plover SS, DIC - Replace Transformers 208*** 208 T-D Interconnection Proposed North Madison - Briggs Road 345 kv line 208*** 208, 3 reliability, economics and policy benefits Planned Tripp Rd Substation, breaker installation 208*** T-D Interconnection Proposed Bay Lake: Morgan Substation -- reconfigure and expand 345-kV and 38-kV switchyards SP*** Bay Lake: North ppleton - Morgan 38 kv line construction SP*** Bay Lake: North ppleton - Morgan 345 kv line construction SP*** Planned Planned Planned City Limits 38-kV bus reconductor 208*** reliability (P3.2) Proposed Depere - Glory Rd 38-kV overhead line rebuild 2020*** Forest Junction 38-kV Substation: Install redundant bus differential Somers Substation: loop Racine - Kenosha 38-kV line 65 in and out Proposed *** reliability (stability E2.D) Proposed <0 209*** T-D interconnection Planned Williams Bay Substation: Loop X-44 in and out 209*** T-D interconnection Proposed was 209 Hancock SS - DIC, Replace Transformers 209*** 209 T-D Interconnection Proposed targeted Plover SS, DIC - Replace Transformers 209*** 209 T-D Interconnection Proposed targeted Stratford SS, DIC, add 2nd transformer and substation rebuild 209*** 209 T-D Interconnection Proposed targeted Central UP, new DIC 209*** T-D Interconnection Proposed targeted Cranberry Substation 5 kv, 0.4 MVR Inductor Bank 209*** 209 P0 Proposed targeted merican Transmission Co ssessment Page of 5

2 TC ssessment Network Project List Iron Grove: 38 kv, 5 MVR Inductor Bank 209*** P0 Proposed targeted M-38 SS and Silver River SS, New 38 kv Inductor Banks 209*** P0 Proposed targeted Winona Substation: 38 kv, 8 MVR Inductor Bank 209*** P0 Proposed targeted Construct Edgerton T-D 38 KV 209*** T-D Interconnection Proposed Construct rcadian 38KV D-T 209*** T-D Interconnection Planned Lincoln SS, 38 kv Bus Reconfiguration 209*** reliability (prior + P.2) Proposed targeted State Line SS, new DIC 209*** T-D Interconnection Proposed targeted Stratford SS, DIC, add 2nd transformer and substation rebuild 209*** 209 T-D Interconnection Proposed targeted Distribution Interconnection *** 209 Various T-D Interconnection Proposed targeted Mount Pleasant Tech Interconnection Project 209*** T-D Interconnection Proposed targeted was 2020 Lost Dauphin - Red Maple 38 kv line uprate Q * Planned was 208 Plymouth 4 Substation, breaker installation 209* T-D Interconnection Planned was 208 West Marinette Substation: dd high side protection to 38/69-kV transformers 209* Planned was 208 Mukwonago Substation: Install line breaker on line 67K6 209* operating flexibility Proposed was 208 Pershing Substation: Loop Stone Lake - Gardner Park 345-kV line into new Pershing 345/5-kV Substation 209*** 209 T-T interconnection Proposed B J703 Huron SS, Generator Interconnection Facilities 209*** G-T Interconnection Proposed targeted J704/J7 GIC- Silver River SS-Interconnection and Network Upgrades 209*** G-T Interconnection Proposed targeted Plains - rnold 38-kV uprate 209*** NITS Request Planned J390: Kittyhawk Substation, new G-T interconnection 209*** G-T Interconnection Proposed J395: Darlington - North Monroe 38 kv line X-49, uprate 207*** G-T Interconnection Proposed Paddock - NW Beloit 38 kv line X-53, install series reactor 209*** Bain - Spring Valley 38-kV uprate & 5 Construct a new 38/69-kV substation on Spring Valley - North Lake Geneva 38-kV circuit & 5 Proposed merican Transmission Co ssessment Page 2 of 5

3 TC ssessment Network Project List Construct a new 69-kV circuit from Twin Lakes to the new substation & 5 Construct a new Spring Valley-North Lake Geneva 38-kV circuit & 5 Twin Lakes - Katzenberg 69-kV rebuild Y & 5 Ellinwood 38-kV Bus Rerate 209* reliability (P6) Proposed Highway V Substation: Install 38-kV breakers and 69-kV circuit switchers on 38/69-kV transformers 209*** reliability (prior + 69P.3) Planned Pulliam 38-kV Substation: Install redundant bus differential 209*** reliability (stability P5.5) Proposed targeted Big Pond SS, Retire Substation 2020*** 2020 no Need Proposed targeted Venus SS, Capacitor Bank Retirement 2020*** 2020 no Need Proposed targeted Marquette County, new DIC 2020*** T-D Interconnection Proposed targeted B Dam Heights SS, DIC, add a new radial line 2020*** T-D Interconnection Proposed targeted Milton Lawns SS, DIC, add 2nd transformer and line breakers 2020*** T-D Interconnection Proposed targeted Muscoda SS, DIC, add 2nd transformer and substation rebuild 2020*** T-D Interconnection Proposed targeted Quincy Street SS, new DIC 2020*** T-D Interconnection Proposed targeted Edgewater - Erdman 69 kv line Y-3 rerate reliability (prior + P.2) Proposed targeted <0 Distribution Interconnection *** 2020 Various T-D Interconnection Proposed target Waupaca rea Energy Storage Project 2020*** 2020 reliability (prior + P.2) Provisional target B J704/J7 GIC- Network Upgrades 2020*** G-T Interconnection Provisional targeted was 209 Forest Junction 38kV Substation: Install 25 Mvar inductor 2020* system intact (P0) Planned was 208 Baker St Substation: dd new 5-kV bus and bus tie breaker 2020*** 2020 T-D Interconnection Planned tlantic Substation: Reconfiguration reliability (69P5) Provisional B, target Northern Lights Substation, new T-D interconnection 2020*** T-D Interconnection Planned Portage-Trienda 38-kV uprate X ** Planned Juneautown Substation, new T-D interconnection 2020*** T-D Interconnection Proposed targeted merican Transmission Co ssessment Page 3 of 5

4 TC ssessment Network Project List Birnamwood SS, DIC, replace transformer and substation rebuild 202*** 202 T-D Interconnection Proposed targeted Eastern UP, new DIC 202*** T-D Interconnection Proposed targeted Kincheloe SS, New DIC 202*** T-D Interconnection Proposed targeted B Green County, new DIC 202*** T-D Interconnection Proposed targeted Portage Industrial Park SS, DIC, replace transformers and substation rebuild Bayport area - Pioneer, rebuild as double-circuit 38 kv *** T-D Interconnection Proposed targeted sset renewal, T-D interconnection Proposed targeted Dartford SS, DIC - Transformer Replacement 202*** T-D Interconnection Proposed targeted B J505 GIC, pollo SS, Generator Interconnection and Network Facilities 202*** G-T Interconnection Proposed targeted Distribution Interconnection *** 202 Various T-D Interconnection Proposed targeted B Presque Isle - Tilden 38 kv line loop into National and uprate National - Tilden 38 kv line Ogden St. Networking Project: Ogden St. - Bayshore 69-kV line construction reliability (prior + P.2) Provisional targeted B 8, target <0 was * T-D interconnection Planned was 208 Port Washington - Saukville: Rebuild Line 762 to a double circuit reliability (P2.4, P7.) Planned Lakota Rd to Winona 38-kV Conversion 2025*** reliability (prior + P.2), condition Provisional >25 rnold Substation: 345 kv, 80 MVR Inductor Bank 2022*** P0 Provisional targeted B Pioneer - Crivitz (E-83/B-2), retire 69 kv and reconfigure load to 38 kv sset renewal, T-D interconnection Proposed targeted Riverside SS, 69 kv Bus Uprate 2022*** reliability (prior plus P) Proposed targeted Distribution Interconnection *** 2022 Various T-D Interconnection Proposed targeted B Venus SS, new inductor bank 2022*** 2022 P0 Provisional target B 9 -- <0 Eaton Substation, new T-D interconnection 2022*** T-D Interconnection Planned Edgewater SS, DIC, replace transformer and substation rebuild 2023*** T-D Interconnection Proposed targeted Cardinal - Hickory Creek 345-kV line construction 2023*** reliability, economics and policy benefits Proposed West Middleton - Stagecoach 69 kv line rebuild ** reliability (P.2, P.3) Proposed B rcadian Substation: install redundant bus differentials on 345-kV and 38-kV buses reliability (stability E2.D) Provisional <0 merican Transmission Co ssessment Page 4 of 5

5 TC ssessment Network Project List Granville Substation: install redundant bus differentials on 345-kV and 38-kV buses reliability (stability E2.D) Provisional <0 Bayridge Substation, new T-D interconnection 2024*** T-D Interconnection Planned 0485 <0 Keel Ridge SS, New DIC 2025*** T-D Interconnection Proposed targeted Gran Grae Substation: Install a second 6/69 kv transformer reliability (69P.3) Provisional <0 Portage - Columbia 38-kV line rebuild X reliability (P.2) Provisional target B Portage - Columbia 38-kV line rebuild X reliability (P.2) Provisional target B Construct Cardinal-Blount 38-kV line > reliability (P6) Provisional Legend * = dates based on approved project scope ISDs ** = SBRM Study Need *** = Other Major Project Study need year No Shading = No change to project since previous ssessment Orange Shading = new project, was not in previous ssessment project list Gray Shading = some change (e.g. In-service year or scope) since previous ssessment merican Transmission Co ssessment Page 5 of 5

ATC Year Asessment Network Project List. Zone 2 switching initiative ASAP*** Operating flexibility Proposed -- --

ATC Year Asessment Network Project List. Zone 2 switching initiative ASAP*** Operating flexibility Proposed -- -- ATC 20 10-Year Asessment Project List Project ACEC Dellwood Substation: Install line breakers to sectionalize Y- 146 20*** 20 1 T-D interconnection Planned A 7741 Zone 2 switching initiative ASAP*** 20