Table PR-2 Transmission System Additions for 2011

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1 Table PR-2 Transmission Additions for 2011 Additions Upgrade McKenna 6.3 MVAR capacitor bank to 15.3 MVAR and upgrade Chaffee Creek 8.1 MVAR bank to 14.4 MVAR Need Install 69-kV bus tie breaker at Delta Rebuild Y-33 Brodhead to South Monroe 69-kV line 2011* Cost Estimate - Refer to Funding Project and Sum of Total ( ) in Financial Table reliability (69B2, 69B3) Proposed F2519 reliability (C1), operating flexibility reliability (B2, 69B2, 69B3) Proposed Planned F3066 F2526 Defined in Previous 10- Assessment Revised in scope from Previous 10- Assessment New to this 10- Assessment

2 Table PR-3 Transmission Additions for 2012 Additions Construct 115-kV line from new Woodmin to the Clear Lake Uprate overhead portions of Straits-McGulpin 138-kV circuits #1 & #3 to 230 F degree summer emergency ratings Need Cost Estimate - Refer to Funding Project and Sum of Total ( ) in Financial Table T-D interconnection Planned F reliability (B2) Proposed F2874 Install second 138/69-kV transformer and a 138-kV ring bus at Chandler reliability (69B3) Proposed F3040 Replace five 69-kV breakers at Delta stability, operating flexibility Proposed F3066 Relocate Engadine 69-kV load reliability (69B2) Proposed F3073 Rebuild 2.37 miles of 69 kv from Sunset Point to Pearl Ave with 477 ACSR reliability (69B2, 69B3) Planned F1361 Construct Canal-Dunn Road 138-kV line Install 100 MVA 138/69-kV transformer at Dunn Road Rebuild part of the Y-8 Dane-Dam Heights 69-kV line* > reliability (69A, 69B2, 69B3, 69C3) reliability (69A, 69B2, 69B3, 69C3) reliability, asset renewal, potential T-D interconnection Planned Planned Planned F1358 F1358 F1602 Defined in Previous 10- Assessment Revised in scope from Previous 10- Assessment New to this 10- Assessment

3 Table PR-4 Transmission Additions for 2013 Additions Need Cost Estimate - Refer to Funding Project and Sum of Total ( ) in Financial Table Rebuild M38-Atlantic 69-kV line reliability (69B2) Planned F3268 Construct 345-kV line from Rockdale to Cardinal 2013* reliability (B2, C5) Planned F1435 Construct a 345-kV bus and install a 345/138 kv 500 MVA transformer at Cardinal 2013* reliability (B2, C5) Planned F1435 Install MVAR 69-kV capacitor banks at Nine Springs Uprate Fitchburg-Nine Springs 69-kV and Royster- Pflaum 69-kV lines and move AGA load to the Royster- Femrite 69-kV line 2008* reliability (69B2) Proposed F * reliability (69B2) Proposed F2088 Rebuild Pleasant Prairie 345-kV bus operating flexibility Proposed F3165 Defined in Previous 10- Assessment Revised in scope from Previous 10- Assessment New to this 10- Assessment

4 Table PR-5 Transmission Additions for 2014 Additions Construct Monroe County-Council Creek 161-kV line and Timberwolf 69-kV switching station Need economics, reliability (B2, C3) Proposed Cost Estimate - Refer to Funding Project and Sum of Total ( ) in Financial Table Install a 161/138-kV transformer at Council Creek economics, reliability (B2, C3) Proposed F2454 Uprate Council Creek-Petenwell 138-kV line economics, reliability (B2) Proposed F2454 Rebuild Straits-Pine River lines 6904/5 for 138 kv and operate at 69 kv reliability (B2) Proposed F2833 Install power flow control at Straits 138-kV reliability (B1) Proposed F2894 Energize Hiawatha-Indian Lake at 138 kv reliability (B2) Proposed F3068 Uprate Munising-Seney-Blaney Park 69-kV line to 167 degrees F reliability (69B2) F3071 Construct 18th Road-Chandler double circuit 138-kV lines and operate at 138/ reliability (69B3), economics Proposed Construct 18th Road 138/69-kV and install two 138/69-kV transformers reliability (69B3) Proposed F3077 Install MVAR 69-kV capacitor banks at 18th Road reliability (69B3) Proposed F3077 Construct Pleasant Prairie-Zion Energy Center 345-kV line economics Proposed F3123 F2454 F3077 Defined in Previous 10- Assessment Revised in scope from Previous 10- Assessment New to this 10- Assessment

5 Table PR-6 Transmission Additions for 2015 Additions Need Cost Estimate - Refer to Funding Project and Sum of Total ( ) in Financial Table Reconfigure Petenwell 138-kV bus operating flexibility F3046 Upgrade 4.1 MVAR capacitor bank to 8.2 MVAR and install a new 8.2 MVAR capacitor bank at Ripon 69-kV > reliability (69B2) F2477 Replace Petenwell 138/69-kV transformer reliability (A, 69B2) F3036 Construct a new Arnold 345-kV and install a 345/138-kV transformer reliability (B1) Proposed F3080 Install MVAR capacitor bank at Boscobel 69-kV and upgrade existing 5.4 MVAR bank with an 8.16 MVAR bank Uprate 6927 West Middleton-Stage Coach 69-kV line to 106 MVA SE Install 3-75 MVAR capacitor banks at Bluemound Construct 138-kV lines to serve Milwaukee County T-D interconnection > reliability (69B2) F2518 > reliability (69B2, 69B3) F3103 > reliability (B1) F T-D interconnection Proposed F3093 Defined in Previous 10- Assessment Revised in scope from Previous 10- Assessment New to this 10- Assessment

6 Table PR-7 Transmission Additions for 2016 Additions Need Cost Estimate - Refer to Funding Project and Sum of Total ( ) in Financial Table Replace existing 56 MVA Harrison 138/69-kV transformer with a 100 MVA transformer Uprate Pine River-Nine Mile 69-kV line 6923 to 167 degrees F and asset renewal for 6921/3 Rebuild Arcadian-Waukesha 138-kV lines KK9942/KK9962 > reliability (A) F reliability (69B2), condition Proposed F reliability (B2) Proposed F2142 Defined in Previous 10- Assessment Revised in scope from Previous 10- Assessment New to this 10- Assessment

7 Table PR-8 Transmission Additions for 2017 Additions Need Cost Estimate - Refer to Funding Project and Sum of Total ( ) in Financial Table Replace 138/69-kV transformer at Metomen reliability (A, 69B3) Proposed F1867 Uprate Castle Rock-Mckenna 69-kV line reliability (69B2, 69B3) F2491 Construct Fairwater-Mackford Prairie 69-kV line > economics, reliability (69B2) F2105 Reconfigure the North Randolph-Ripon 69-kV line to form a second Ripon-Metomen 69-kV line and retire the circuit between Metomen and the Mackford Prairie tap Install Mvar 138-kV capacitor bank and 1-18 Mvar 69-kV capacitor bank at Brick Church substation > economics, reliability (69B2) F2105 > reliability (69B2) F2404 Defined in Previous 10- Assessment Revised in scope from Previous 10- Assessment New to this 10- Assessment

8 Table PR-9 Transmission Additions for 2018 Additions Install a second 138/69-kV transformer at Wautoma Need Cost Estimate - Refer to Funding Project and Sum of Total ( ) in Financial Table > reliability (A, 69B2) F2480 Convert Necedah distribution substation from 69 kv to 138 kv > reliability (69B2, 69B3) F2560 Replace existing Caroline 115/69-kV transformer > reliability (69B3) F3113 Uprate the 6986 Royster to Sycamore 69-kV line to 115 MVA reliability (69B3) F2471 Install a second 100 MVA 138/69 kv transformer at Hillman Install a second 138/69-kV transformer at Spring Green with a 100 MVA summer normal rating > reliability (69B2, 69B3) F0339 > reliability (69B3) F2445 Uprate Y87 North Monroe-South Monroe 69-kV line to 115 MVA SE > reliability (69B2) TBD Construct Badger Coulee 345-kV line policy benefits Proposed F3105 Convert Forest Junction - Howards Grove and a portion of the Howards Grove - Holland 138-kV circuits to new generation Proposed F3064 kv Barnhart : Construct new 345/138-kV substation with new 500 MVA 345/138-kV transformer new generation Proposed F3064 Branch River : Construct new 345-kV switching station new generation Proposed F3064 Uprate the Edgewater-Cedarsauk 345-kV circuit new generation Proposed F3064 Construct a new Barnhart - Plymouth - Howards Grove - Erdman 138-kV circuit new generation Proposed F3064 Point Beach : Install new series 345-kV breaker for circuit Q new generation Proposed F3064

9 Table PR-9 Transmission Additions for 2018 (continued) Additions Need Cost Estimate - Refer to Funding Project and Sum of Total ( ) in Financial Table Construct new 138-kV bus and install a 138/69-kV 100 MVA transformer at South Lake Geneva Construct new 138-kV line from North Lake Geneva to South Lake Geneva > reliability (69B2) F2587 > Rebuild Y-32 Colley Road-Brick Church 69-kV line > reliability (69B2), T-D interconnection reliability (B2, 69B3, 69C5, C3) condition F2587 F1670 Defined in Previous 10- Assessment Revised in scope from Previous 10- Assessment New to this 10- Assessment

10 Table PR-10 Transmission Additions for 2019 Additions Need Cost Estimate - Refer to Funding Project and Sum of Total ( ) in Financial Table Uprate Winneconne-Sunset Point 69-kV line Y-103 > reliability (69B2) F3062 Uprate Ripon-Northwest Ripon 69-kV line Y-93 > reliability (69B2) TBD Construct 69-kV double-circuit line between McCue and Lamar substations > reliability (A, 69B2) F2558 Install MVAR 69-kV capacitor banks at Eden Construct Spring Valley-Twin Lakes-South Lake Geneva 138-kV line Install Mvar 69-kV capacitor banks at Dam Heights > reliability (A, B2) F & 5 T-D interconnection,reliability (69B2) F2570 > reliability (69B2) F2474 Defined in Previous 10- Assessment Revised in scope from Previous 10- Assessment New to this 10- Assessment

11 Table PR-11 Transmission Additions for 2020 Additions Need Cost Estimate - Refer to Funding Project and Sum of Total ( ) in Financial Table Rebuild the Y-119 Sun Valley Tap to Oregon 69-kV line > reliability, condition (69B3, 69C3) F2469 Construct Dubuque-Spring Green-Cardinal 345-kV line policy benefits TBD Construct Cardinal-Blount 138-kV line > reliability (C5) F2466 Replace two existing 345/138-kV transformers at Arcadian with MVA transformer reliability (B3) F2539 Install 4-49 MVAR 138-kV capacitor banks at Concord > reliability (B2) F2489 Construct a Lake Delton-Birchwood 138-kV line > reliability (B2) F1638 Defined in Previous 10- Assessment Revised in scope from Previous 10- Assessment New to this 10- Assessment

12 Table PR-12 Transmission Additions for 2021 Additions Install Mvar 69-kV capacitor banks at North Monroe Need Cost Estimate - Refer to Funding Project and Sum of Total ( ) in Financial Table > reliability (B2) F2472 Install MVAR 69-kV capacitor bank at Verona > reliability (A, B2, B3) F2520 Construct second Dunn Road-Egg Harbor 69-kV line > reliability (69B2) F0181 Uprate Oak Creek-Bluemound 230-kV line operating flexibility F3349 Uprate Y159 Brick Church-Walworth 69-kV line to 115 MVA > reliability (69B2) F2153 Defined in Previous 10- Assessment Revised in scope from Previous 10- Assessment New to this 10- Assessment

13 Table PR-13 Transmission Additions beyond 2021 Additions Need Cost Estimate - Refer to Funding Project and Sum of Total ( ) in Financial Table Install Mvar 69-kV capacitor banks at Sun Prairie > reliability (69B2, 69B3) F2475 Rebuild West Middleton-Pheasant Branch 69-kV line with double circuits to achieve a 240 MVA SE on each reliability (69B2) TBD circuit Construct Shoto to Custer 138-kV line > reliability (69B2, 69B3) F2081 Install 138/69-kV transformer at Custer > reliability (69B2, 69B3) F2081 Upgrade Oak Creek-Pennsylvania 138-kV line > reliability (B2) F2473 Construct a Hubbard-East Beaver Dam 138-kV line > reliability (B2) F1640 Uprate X-67 Portage-Trienda 138-kV line to 373 MVA > reliability (69B2) F2092 Install MVAR 69-kV capacitor banks at Mazomanie > reliability (69B2) F2517 Replace two existing 138/69-kV transformers at Sunset Point with 100 MVA transformers > reliability (69B3) F2080 Replace two existing 138/69-kV transformers at Glenview with 100 MVA transformers > reliability (69B3) F2079 Construct a 345-kV bus, install a 345/138-kV 500 MVA transformer at North Randolph and loop the Columbia to > reliability (B2) F2093 South Fond Du Lac 345-kV line into the substation Reconductor Harbor-Kansas 138-kV line 2021 TBD 5 reliability TBD Uprate Columbia 345/138-kV transformer T-22 to 527 MVA >2026 TBD 3 reliability (B3) F2135 Defined in Previous 10- Assessment Revised in scope from Previous 10- Assessment New to this 10- Assessment

14 Table PR-14 1 Transmission Additions Additions Need Upgrade McKenna 6.3 MVAR capacitor bank to 15.3 MVAR and upgrade Chaffee Creek 8.1 MVAR bank to 14.4 MVAR Construct 115-kV line from new Woodmin to the Clear Lake Construct Monroe County-Council Creek 161-kV line and Timberwolf 69-kV switching station Install a 161/138-kV transformer at Council Creek reliability (69B2, 69B3) Proposed T-D interconnection Planned economics, reliability (B2, C3) economics, reliability (B2, C3) Proposed Proposed Uprate Council Creek-Petenwell 138-kV line economics, reliability (B2) Proposed Reconfigure Petenwell 138-kV bus operating flexibility Upgrade 4.1 MVAR capacitor bank to 8.2 MVAR and install a new 8.2 MVAR capacitor bank at Ripon 69-kV > reliability (69B2) Replace Petenwell 138/69-kV transformer reliability (A, 69B2) Replace existing 56 MVA Harrison 138/69-kV transformer with a 100 MVA transformer > reliability (A) Replace 138/69-kV transformer at Metomen reliability (A, 69B3) Proposed Uprate Castle Rock-Mckenna 69-kV line reliability (69B2, 69B3) Construct Fairwater-Mackford Prairie 69-kV line > economics, reliability (69B2) Reconfigure the North Randolph-Ripon 69-kV line to form a second Ripon-Metomen 69-kV line and retire the circuit between Metomen and the Mackford Prairie tap Install a second 138/69-kV transformer at Wautoma > economics, reliability (69B2) > reliability (A, 69B2) Convert Necedah distribution substation from 69 kv to 138 kv > reliability (69B2, 69B3) Replace existing Caroline 115/69-kV transformer > reliability (69B3) Uprate Winneconne-Sunset Point 69-kV line Y-103 > reliability (69B2) Uprate Ripon-Northwest Ripon 69-kV line Y-93 > reliability (69B2)

15 Table PR-15 2 Transmission Additions Additions Need Install 69-kV bus tie breaker at Delta Uprate overhead portions of Straits-McGulpin 138-kV circuits #1 & #3 to 230 F degree summer emergency ratings reliability (C1), operating flexibility Proposed reliability (B2) Proposed Install second 138/69-kV transformer and a 138-kV ring bus at Chandler reliability (69B3) Proposed Replace five 69-kV breakers at Delta stability, operating flexibility Proposed Relocate Engadine 69-kV load reliability (69B2) Proposed Rebuild M38-Atlantic 69-kV line reliability (69B2) Planned Rebuild Straits-Pine River lines 6904/5 for 138 kv and operate at 69 kv reliability (B2) Proposed Install power flow control at Straits 138-kV reliability (B1) Proposed Energize Hiawatha-Indian Lake at 138 kv reliability (B2) Proposed Uprate Munising-Seney-Blaney Park 69-kV line to 167 degrees F reliability (69B2) Construct 18th Road-Chandler double circuit 138-kV lines and operate at 138/ reliability (69B3), economics Proposed Construct 18th Road 138/69-kV and install two 138/69-kV transformers reliability (69B3) Proposed Install MVAR 69-kV capacitor banks at 18th Road reliability (69B3) Proposed Construct a new Arnold 345-kV and install a 345/138-kV transformer reliability (B1) Proposed Uprate Pine River-Nine Mile 69-kV line 6923 to 167 degrees F and asset renewal for 6921/ reliability (69B2), condition Proposed

16 Table PR-16 3 Transmission Additions Additions Need Rebuild Y-33 Brodhead to South Monroe 69-kV line 2011* Rebuild part of the Y-8 Dane-Dam Heights 69-kV line* > reliability (B2, 69B2, 69B3) reliability, asset renewal, potential T-D interconnection Planned Planned Construct 345-kV line from Rockdale to Cardinal 2013* reliability (B2, C5) Planned Construct a 345-kV bus and install a 345/138 kv 500 MVA transformer at Cardinal 2013* reliability (B2, C5) Planned Install MVAR 69-kV capacitor banks at Nine Springs Uprate Fitchburg-Nine Springs 69-kV and Royster- Pflaum 69-kV lines and move AGA load to the Royster- Femrite 69-kV line Install MVAR capacitor bank at Boscobel 69-kV and upgrade existing 5.4 MVAR bank with an 8.16 MVAR bank Uprate 6927 West Middleton-Stage Coach 69-kV line to 106 MVA SE Install Mvar 138-kV capacitor bank and 1-18 Mvar 69-kV capacitor bank at Brick Church substation Uprate the 6986 Royster to Sycamore 69-kV line to 115 MVA Install a second 100 MVA 138/69 kv transformer at Hillman Install a second 138/69-kV transformer at Spring Green with a 100 MVA summer normal rating 2008* reliability (69B2) Proposed 2008* reliability (69B2) Proposed > reliability (69B2) > reliability (69B2, 69B3) > reliability (69B2) reliability (69B3) > reliability (69B2, 69B3) > reliability (69B3) Uprate Y87 North Monroe-South Monroe 69-kV line to 115 MVA SE > reliability (69B2) Construct Badger Coulee 345-kV line policy benefits Proposed

17 Table PR-16 (continued) 3 Transmission Additions Additions Need Construct new 138-kV bus and install a 138/69-kV 100 MVA transformer at South Lake Geneva Construct new 138-kV line from North Lake Geneva to South Lake Geneva > reliability (69B2) > Rebuild Y-32 Colley Road-Brick Church 69-kV line > Construct 69-kV double-circuit line between McCue and Lamar substations Install MVAR 69-kV capacitor banks at Eden Construct Spring Valley-Twin Lakes-South Lake Geneva 138-kV line Install Mvar 69-kV capacitor banks at Dam Heights reliability (69B2), T-D interconnection reliability (B2, 69B3, 69C5, C3) condition > reliability (A, 69B2) > reliability (A, B2) & 5 T-D interconnection,reliability (69B2) > reliability (69B2) Rebuild the Y-119 Sun Valley Tap to Oregon 69-kV line > reliability, condition (69B3, 69C3) Construct Dubuque-Spring Green-Cardinal 345-kV line policy benefits Construct Cardinal-Blount 138-kV line > reliability (C5) Install 4-49 MVAR 138-kV capacitor banks at Concord > reliability (B2) Construct a Lake Delton-Birchwood 138-kV line > reliability (B2) Install Mvar 69-kV capacitor banks at North Monroe > reliability (B2) Install MVAR 69-kV capacitor bank at Verona > reliability (A, B2, B3) Uprate Y159 Brick Church-Walworth 69-kV line to 115 MVA > reliability (69B2)

18 Table PR-16 (continued) 3 Transmission Additions Additions Need Install Mvar 69-kV capacitor banks at Sun Prairie > reliability (69B2, 69B3) Rebuild West Middleton-Pheasant Branch 69-kV line with double circuits to achieve a 240 MVA SE on each reliability (69B2) circuit Construct a Hubbard-East Beaver Dam 138-kV line > reliability (B2) Uprate X-67 Portage-Trienda 138-kV line to 373 MVA > reliability (69B2) Install MVAR 69-kV capacitor banks at Mazomanie > reliability (69B2) Construct a 345-kV bus, install a 345/138-kV 500 MVA transformer at North Randolph and loop the Columbia to South Fond Du Lac 345-kV line into the substation Uprate Columbia 345/138-kV transformer T-22 to 527 MVA > reliability (B2) >2026 TBD 3 reliability (B3)

19 Table PR-17 4 Transmission Additions Additions Need Rebuild 2.37 miles of 69 kv from Sunset Point to Pearl Ave with 477 ACSR Construct Canal-Dunn Road 138-kV line Install 100 MVA 138/69-kV transformer at Dunn Road Convert Forest Junction - Howards Grove and a portion of the Howards Grove - Holland 138-kV circuits to 345- kv Barnhart : Construct new 345/138-kV substation with new 500 MVA 345/138-kV transformer reliability (69B2, 69B3) Planned reliability (69A, 69B2, 69B3, 69C3) reliability (69A, 69B2, 69B3, 69C3) Planned Planned new generation Proposed new generation Proposed Branch River : Construct new 345-kV switching station new generation Proposed Uprate the Edgewater-Cedarsauk 345-kV circuit new generation Proposed Construct a new Barnhart - Plymouth - Howards Grove - Erdman 138-kV circuit new generation Proposed Point Beach : Install new series 345-kV breaker for circuit Q new generation Proposed Construct second Dunn Road-Egg Harbor 69-kV line > reliability (69B2) Construct Shoto to Custer 138-kV line > reliability (69B2, 69B3) Install 138/69-kV transformer at Custer > reliability (69B2, 69B3) Replace two existing 138/69-kV transformers at Sunset Point with 100 MVA transformers > reliability (69B3) Replace two existing 138/69-kV transformers at Glenview with 100 MVA transformers > reliability (69B3)

20 Table PR-18 5 Transmission Additions Additions Need Rebuild Pleasant Prairie 345-kV bus operating flexibility Proposed Construct Pleasant Prairie-Zion Energy Center 345-kV line economics Proposed Install 3-75 MVAR capacitor banks at Bluemound > reliability (B1) Construct 138-kV lines to serve Milwaukee County T-D interconnection Rebuild Arcadian-Waukesha 138-kV lines KK9942/KK9962 Construct Spring Valley-Twin Lakes-South Lake Geneva 138-kV line T-D interconnection Proposed reliability (B2) Proposed & 5 T-D interconnection,reliability (69B2) Replace two existing 345/138-kV transformers at Arcadian with MVA transformer reliability (B3) Uprate Oak Creek-Bluemound 230-kV line operating flexibility Upgrade Oak Creek-Pennsylvania 138-kV line > reliability (B2) Reconductor Harbor-Kansas 138-kV line 2021 TBD 5 reliability

21 Table PR-19 Identified Needs and Transmission Lines Requiring New Right-of-Way Identified Need T-D interconnection request under contingency (B2, C5) under contingency (69B3), economics economics T-D interconnection request economics, relieve overloads or low voltages under contingency (69B2) Potential Solutions Construct 115-kV line from new Woodmin to the Clear Lake Construct 345-kV line from Rockdale to Cardinal Construct 18th Road-Chandler double circuit 138-kV lines and operate at 138/69 Construct Pleasant Prairie-Zion Energy Center 345-kV line Construct 138-kV lines to serve Milwaukee County T-D interconnection request Construct Fairwater-Mackford Prairie 69- kv line Approx. line mileage Total New ROW Need Inservice > policy benefits Construct Badger Coulee 345-kV line accommodate new generation under contingency (69B2), T-D interconnection request T-D interconnection request,relieve overloads or low voltages under contingency (69B2) policy benefits under contingency (B2) under contingency (69B2) under contingency (69B2, 69B3) under contingency (B2) Construct a new Barnhart - Plymouth - Howards Grove - Erdman 138-kV circuit Construct new 138-kV line from North Lake Geneva to South Lake Geneva Construct Spring Valley-Twin Lakes- South Lake Geneva 138-kV line Construct Dubuque-Spring Green- Cardinal 345-kV line Construct a Lake Delton-Birchwood 138- kv line Construct second Dunn Road-Egg Harbor 69-kV line > & > > Construct Shoto to Custer 138-kV line > Construct a Hubbard-East Beaver Dam 138-kV line >

22 Table PR-20 Transmission Line Rebuild/Reconductors, New Circuits and Voltage Conversions on Existing Right-of-Way Identified Need under contingency (B2, 69B2, 69B3) under contingency (69B2, 69B3) under contingency (69A, 69B2, 69B3, 69C3) under contingency, asset renewal, potential T-D interconnection request under contingency (69B2) economics, relieve overloads or low voltages under contingency (B2, C3) economics, relieve overloads or low voltages under contingency (B2) under contingency (B2) under contingency (B2) under contingency (69B2) Lines to be Rebuilt/Reconductored on Existing ROW Rebuild Y-33 Brodhead to South Monroe 69-kV line Rebuild 2.37 miles of 69 kv from Sunset Point to Pearl Ave with 477 ACSR Approx. Mileage of Rebuilt, Reconductored or Uprated Lines Need In-service * Construct Canal-Dunn Road 138-kV line Rebuild part of the Y-8 Dane-Dam Heights 69-kV line* 5 > Rebuild M38-Atlantic 69-kV line Construct Monroe County-Council Creek 161-kV line and Timberwolf 69-kV switching station Uprate Council Creek-Petenwell 138-kV line Rebuild Straits-Pine River lines 6904/5 for 138 kv and operate at 69 kv Energize Hiawatha-Indian Lake at 138 kv Uprate Munising-Seney-Blaney Park 69- kv line to 167 degrees F

23 Identified Need under contingency (69B2), replace aging facilities under contingency (69B3) accommodate new generation accommodate new generation under contingency (B2, 69B3, 69C5, C3) replace aging facilities under contingency (A, 69B2) under contingency, replace aging facilities (69B3, 69C3) under contingency (C5) operating flexibility under contingency (69B2) under contingency Table PR-20 Transmission Line Rebuild/Reconductors, New Circuits and Voltage Conversions on Existing Right-of-Way (continued) Lines to be Rebuilt/Reconductored on Existing ROW Uprate Pine River-Nine Mile 69-kV line 6923 to 167 degrees F and asset renewal for 6921/3 Uprate the 6986 Royster to Sycamore 69- kv line to 115 MVA Convert Forest Junction - Howards Grove and a portion of the Howards Grove - Holland 138-kV circuits to 345-kV Uprate the Edgewater-Cedarsauk 345-kV circuit Rebuild Y-32 Colley Road-Brick Church 69-kV line Construct 69-kV double-circuit line between McCue and Lamar substations Rebuild the Y-119 Sun Valley Tap to Oregon 69-kV line Approx. Mileage of Rebuilt, Reconductored or Uprated Lines Need In-service > > > Construct Cardinal-Blount 138-kV line 5 > Uprate Oak Creek-Bluemound 230-kV line Rebuild West Middleton-Pheasant Branch 69-kV line with double circuits to achieve a 240 MVA SE on each circuit Reconductor Harbor-Kansas 138-kV line TBD 5

24 Table PR-21 New s, Transformer Additions, and Replacements Identified need (69B3) (69A, 69B2, 69B3, 69C3) (B2, C5) economics, relieve overloads under contingency (B2, C3) (69B3) (A, 69B2) (B1) (A) (A, 69B3) (A, 69B2) (69B2, 69B3) (69B3) Potential additions or replacements Install second 138/69-kV transformer and a 138-kV ring bus at Chandler Install 100 MVA 138/69-kV transformer at Dunn Road Construct a 345-kV bus and install a 345/138 kv 500 MVA transformer at Cardinal Install a 161/138-kV transformer at Council Creek Construct 18th Road 138/69-kV and install two 138/69-kV transformers Transformer Capacity (MVA) Install Replace Need Inservice * N/A Replace Petenwell 138/69-kV transformer Construct a new Arnold 345-kV and install a 345/138-kV transformer Replace existing 56 MVA Harrison 138/69- kv transformer with a 100 MVA transformer Replace 138/69-kV transformer at Metomen Install a second 138/69-kV transformer at Wautoma Convert Necedah distribution substation from 69 kv to 138 kv Replace existing Caroline 115/69-kV transformer > > N/A 0 > >

25 Table PR-21 New s, Transformer Additions, and Replacements (continued) Identified need (69B2, 69B3) (69B3) accommodate new generation accommodate new generation (69B2) (B3) (69B2, 69B3) (69B3) Potential additions or replacements Install a second 100 MVA 138/69 kv transformer at Hillman Install a second 138/69-kV transformer at Spring Green with a 100 MVA summer normal rating Barnhart : Construct new 345/138-kV substation with new 500 MVA 345/138-kV transformer Branch River : Construct new 345-kV switching station Construct new 138-kV bus and install a 138/69-kV 100 MVA transformer at South Lake Geneva Replace two existing 345/138-kV transformers at Arcadian with MVA transformer Install 138/69-kV transformer at Custer Replace two existing 138/69-kV transformers at Sunset Point with 100 MVA transformers Transformer Capacity (MVA) Install Replace Need Inservice > > N/A N/A > > >

26 Table PR-21 New s, Transformer Additions, and Replacements (continued) Identified need (69B3) (B2) (B3) Potential additions or replacements Replace two existing 138/69-kV transformers at Glenview with 100 MVA transformers Construct a 345-kV bus, install a 345/138- kv 500 MVA transformer at North Randolph and loop the Columbia to South Fond Du Lac 345-kV line into the substation Uprate Columbia 345/138-kV transformer T- 22 to 527 MVA Transformer Capacity (MVA) Install Replace Need Inservice > > >2026 TBD 3

27 Identified Need contingency (69B2, 69B3) contingency (C1), operating flexibility contingency (B2) stability, operating flexibility contingency (69B2) contingency (69B2) contingency (69B2) Table PR-22 Equipment Additions and Replacements Potential Additions or Replacements Upgrade McKenna 6.3 MVAR capacitor bank to 15.3 MVAR and upgrade Chaffee Creek 8.1 MVAR bank to 14.4 MVAR Install 69-kV bus tie breaker at Delta Uprate overhead portions of Straits-McGulpin 138-kV circuits #1 & #3 to 230 F degree summer emergency ratings Replace five 69-kV breakers at Delta Capacitor Bank Capacity (MVAR) Need Inservice N/A N/A N/A Relocate Engadine 69-kV load N/A Install MVAR 69-kV capacitor banks at Nine Springs Uprate Fitchburg-Nine Springs 69-kV and Royster-Pflaum 69-kV lines and move AGA load to the Royster-Femrite 69-kV line * N/A 2008* operating flexibility Rebuild Pleasant Prairie 345-kV bus N/A Install power flow control at Straits 138-kV N/A contingency (B1) Install MVAR 69-kV capacitor banks at contingency (69B3) 18th Road operating flexibility Reconfigure Petenwell 138-kV bus N/A contingency (69B2) Upgrade 4.1 MVAR capacitor bank to 8.2 MVAR and install a new 8.2 MVAR capacitor bank at Ripon 69-kV 12.3 >

28 Identified Need Table PR-22 Equipment Additions and Replacements (continued) Potential Additions or Replacements Capacitor Bank Capacity (MVAR) Need Inservice operating flexibility Reconfigure Petenwell 138-kV bus N/A contingency (69B2) contingency (69B2) contingency (69B2, 69B3) contingency (B1) contingency (B2) contingency (69B2, 69B3) economics, relieve overloads or low voltages under contingency (69B2) contingency (69B2) contingency (69B2) accommodate new generation Upgrade 4.1 MVAR capacitor bank to 8.2 MVAR and install a new 8.2 MVAR capacitor bank at Ripon 69-kV Install MVAR capacitor bank at Boscobel 69-kV and upgrade existing 5.4 MVAR bank with an 8.16 MVAR bank Uprate 6927 West Middleton-Stage Coach 69- kv line to 106 MVA SE Install 3-75 MVAR capacitor banks at Bluemound Rebuild Arcadian-Waukesha 138-kV lines KK9942/KK > > N/A > > N/A Uprate Castle Rock-Mckenna 69-kV line Reconfigure the North Randolph-Ripon 69-kV line to form a second Ripon-Metomen 69-kV line and retire the circuit between Metomen and the Mackford Prairie tap Install Mvar 138-kV capacitor bank and 1-18 Mvar 69-kV capacitor bank at Brick Church substation Uprate Y87 North Monroe-South Monroe 69- kv line to 115 MVA SE Point Beach : Install new series 345-kV breaker for circuit Q-303 N/A > > N/A > N/A

29 Table PR-22 Equipment Additions and Replacements (continued) Identified Need contingency (69B2) contingency (69B2) contingency (A, B2) contingency (69B2) contingency (B2) contingency (B2) contingency (A, B2, B3) contingency (69B2) contingency (69B2, 69B3) contingency (B2) contingency (69B2) contingency (69B2) Potential Additions or Replacements Uprate Winneconne-Sunset Point 69-kV line Y-103 Uprate Ripon-Northwest Ripon 69-kV line Y- 93 Install MVAR 69-kV capacitor banks at Eden Install Mvar 69-kV capacitor banks at Dam Heights Install 4-49 MVAR 138-kV capacitor banks at Concord Install Mvar 69-kV capacitor banks at North Monroe Install MVAR 69-kV capacitor bank at Verona Uprate Y159 Brick Church-Walworth 69-kV line to 115 MVA Install Mvar 69-kV capacitor banks at Sun Prairie Capacitor Bank Capacity (MVAR) Need Inservice 7.4 > N/A > > > > > > N/A > > Upgrade Oak Creek-Pennsylvania 138-kV line N/A > Uprate X-67 Portage-Trienda 138-kV line to 373 MVA Install MVAR 69-kV capacitor banks at Mazomanie N/A > >

30 Table PR-23 Summary of Cancellations, Deferrals, Changes, Possible Changes and New Projects Projects Canceled Install 2-32 Mvar capacitor banks at Mukwonago 138-kV Former In- Service Date Reason for Removal updated load/model information Construct Gwinn-Forsyth second 69-kV line N/A 2 updated load/model information Construct a 69-kV line from SW Ripon to the Ripon- Metomen 69-kV line customer postponed Projects Deferred Rebuild 2.37 miles of 69 kv from Sunset Point to Pearl Ave with 477 ACSR New In- Service Date Rebuild M38-Atlantic 69-kV line Construct Monroe County-Council Creek 161-kV line and Timberwolf 69-kV switching station Install a 161/138-kV transformer at Council Creek Reason for Deferral was 2011, easement issues New project scope, schedule and ISD now identified was 2013, regulatory issues was 2013, regulatory issues Uprate Council Creek-Petenwell 138-kV line was 2013, regulatory issues Reconfigure Petenwell 138-kV bus Install 3-75 MVAR capacitor banks at Bluemound Rebuild Arcadian-Waukesha 138-kV lines KK9942/KK9962 Construct new 138-kV bus and install a 138/69-kV 100 MVA transformer at South Lake Geneva Construct new 138-kV line from North Lake Geneva to South Lake Geneva Construct 69-kV double-circuit line between McCue and Lamar substations was 2013, bus reconfiguration will be performed with the transformer replacement for project management efficiencies Updated load/model information was 2015, was uprate and provisional status (now proposed); updated study results was 2016 and proposed status (now provisional); updated load/model information was 2016 and proposed status (now provisional); updated load/model information was 2017, updated load/model information

31 Table PR-23 Summary of Cancellations, Deferrals, Changes, Possible Changes and New Projects (continued) Projects Deferred Construct Spring Valley-Twin Lakes-South Lake Geneva 138-kV line Rebuild the Y-119 Sun Valley Tap to Oregon 69-kV line Replace two existing 345/138-kV transformers at Arcadian with MVA transformer Install 4-49 MVAR 138-kV capacitor banks at Concord Install Mvar 69-kV capacitor banks at North Monroe Install MVAR 69-kV capacitor bank at Verona New In- Service Date Reason for Deferral & 5 was 2018; updated load/model information was proposed in 2014 and formerly named Verona to Oregon, increased line ratings was 2015; updated study results was 2019, updated load/model information was 2018, updated load/model information was 2018, updated load/model information Construct second Dunn Road-Egg Harbor 69-kV line was 2018, updated load/model information Install Mvar 69-kV capacitor banks at Sun Prairie Install MVAR 69-kV capacitor banks at Mazomanie Replace two existing 138/69-kV transformers at Glenview with 100 MVA transformers Other Project Changes and Possible Changes Uprate overhead portions of Straits-McGulpin 138-kV circuits #1 & #3 to 230 F degree summer emergency ratings Install MVAR capacitor bank at Boscobel 69- kv and upgrade existing 5.4 MVAR bank with an 8.16 MVAR bank was 2020, updated load/model information was 2020, updated load/model information was 2020, updated load/model information Date Nature of Change or Update Project completed ahead of schedule due to availability of construction resources and required outages was 2019, Gran Grae 161/69-kV transformer prior outage issues

32 Table PR-23 Summary of Cancellations, Deferrals, Changes, Possible Changes and New Projects (continued) Other Project Changes and Possible Changes Date Nature of Change or Update Construct Fairwater-Mackford Prairie 69-kV line ISD may be bought forward if project shows economic benefit. Reconfigure the North Randolph-Ripon 69-kV line to form a second Ripon-Metomen 69-kV line and retire the circuit between Metomen and the Mackford Prairie tap ISD may be bought forward if project shows economic benefit. Uprate the 6986 Royster to Sycamore 69-kV line to 115 MVA was 2019, updated load/model information New Projects Date Reason for Project Rebuild Pleasant Prairie 345-kV bus operating flexibility Construct Pleasant Prairie-Zion Energy Center 345- kv line Construct 138-kV lines to serve Milwaukee County T- D interconnection economics T-D interconnection Construct Badger Coulee 345-kV line policy benefits Convert Forest Junction - Howards Grove and a portion of the Howards Grove - Holland 138-kV circuits to 345-kV Barnhart : Construct new 345/138-kV substation with new 500 MVA 345/138-kV transformer Branch River : Construct new 345-kV switching station new generation new generation new generation Uprate the Edgewater-Cedarsauk 345-kV circuit new generation Construct a new Barnhart - Plymouth - Howards Grove - Erdman 138-kV circuit Point Beach : Install new series 345-kV breaker for circuit Q new generation new generation

33 Table PR-23 Summary of Cancellations, Deferrals, Changes, Possible Changes and New Projects (continued) New Projects Construct Dubuque-Spring Green-Cardinal 345-kV line Date Reason for Project policy benefits Uprate Oak Creek-Bluemound 230-kV line operating flexibility Rebuild West Middleton-Pheasant Branch 69-kV line with double circuits to achieve a 240 MVA SE on each circuit updated load/model information

34 Table PR-24 Projects In Design or Construction Project Construct 69-kV line from new Warrens to the Council Creek-Tunnel City 69-kV line Uprate Y-61 McCue-Lamar 69-kV line to achieve 300 deg F line ratings and install Mvar 69-kV capacitor banks at Lamar 1 3 Uprate the Royster terminals 3 Uprate Y-61 Sheepskin-Dana 69-kV line to 95 MVA 3 Uprate Y-40 Gran Grae-Boscobel 69-kV line to achieve a 99 MVA summer emergency rating* 3 Rebuild Y-33 Brodhead to South Monroe 69-kV line 3 Construct a 138-kV bus at Pleasant Valley to permit second distribution transformer interconnection 5 Construct 345-kV line from Rockdale to Cardinal 3 Construct Canal-Dunn Road 138-kV line 4

35 Table PR-25 Projects Awaiting Regulatory Review/Approval Project Reconfigure the 345 kv switchyard and replace breakers at the Pleasant Prairie Power Plant Construct Monroe County-Council Creek 161-kV line and Timberwolf 69-kV switching station 5 1

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