1. 2016 Attachment O Projection Stakeholder Meeting Ameren Transmission Company of Illinois October 1, 2015

2. 2 AGENDA Main Purpose is to review ATXI 2016 Projected Transmission Rate Calculations Timeline ATXI 2016 Projection Attachment O Attachment MM 2016 AMIL Pricing Zone NITS Charge

3. 3 PROTOCOL TIMELINE Date Schedule (Forward-Looking Protocols) June 1  Posting of annual true-up for prior year September 1  Deadline for annual true-up meeting September 1  Posting of net projected revenue requirement for following year October 15  Deadline for annual projected rate meeting November 1  Deadline for joint meeting on regional cost-shared projects March 15  Transmission Owners submit informational filing to the Commission

4. 4 ATXI Revenue Requirement Projected 2015 vs Projected 2016

5. 5 ATXI 2016 PROJECTED RATE BASE Page.Line Jan-15Jan-16ChangePercent 2.6Total Gross Plant80,778,000244,237,971163,459,971202% 2.12Total Accum Depreciation4,717,0009,096,7784,379,77893% 2.18TOTAL NET PLANT76,061,000235,141,193159,080,193209% 2.18a100% CWIP RECOVERY471,564,000684,234,021212,670,02145% ADJUSTMENTS TO RATE BASE 2.20 Account No. 282-12,824,000-39,416,856-26,592,856207% 2.21 Account No. 283-2,720,000-3,419,130-699,13026% 2.22 Account No. 1902,470,0008,262,2195,792,219235% 2.25 Land Held for Future Use000N/A 2.26 CWC866,6251,575,005708,38082% 2.27 Materials & Supplies000N/A 2.28 Prepayments190,000392,795202,795107% TOTAL ADJUSTMENTS-12,017,375-32,605,966-20,588,591171% 2.30TOTAL RATE BASE535,607,625886,769,248351,161,62366%

6. 6 ATXI 2016 PROJECTED EXPENSES Page.Line Jan-15Jan-16ChangePercent O&M 3.1 Transmission367,0001,200,387833,387227% 3.1a Less LSE Expenses000N/A 3.2 Less Account 565000N/A 3.3 A&G6,566,00011,399,6504,833,65074% 3.4 Less FERC Annual Fees000N/A 3.5 Less EPRI, ect.50,00051,1641,1642% 3.5a Plus Trans. Reg. Comm. Exp50,00051,1641,1642% 3.8TOTAL O&M6,933,00012,600,0375,667,03782% 3.12TOTAL DEPRECIATION1,132,0006,599,5815,467,581483% TAXES 3.13 Payroll000N/A 3.16 Property0763,426 N/A 3.18 Other155,000500,000345,000223% 3.27 Income Taxes24,806,31341,070,85416,264,54166% TOTAL TAXES24,961,31342,334,28017,372,96770% TOTAL EXPENSES33,026,31361,533,89828,507,58586%

7. 7 ATXI 2016 PROJECTED CAPITAL STRUCTURE Capital Structure - 2015 Projection Page.Line $%CostWeighted 4.27 Long Term Debt192,308,00043.8%0.04270.0187 4.28 Preferred Stock00.0%0.0000 4.29 Common Stock247,121,00056.2%0.12380.0696 4.30Total439,429,000100.0%0.0883 Capital Structure - 2016 Projection Page.Line $%CostWeighted 4.27 Long Term Debt303,846,15443.9%0.03910.0172 4.28 Preferred Stock00.0%0.0000 4.29 Common Stock388,732,96156.1%0.12380.0695 4.30Total692,579,115100.0%0.0866 Change in Return-0.1684%

8. 8 ATXI 2016 PROJECTED TOTAL REVENUE REQUIREMENT Page.Line Jan-15Jan-16ChangePercent 2.30TOTAL RATE BASE535,607,625886,769,248351,161,62366% 4.30Rate of Return on ACS8.83%8.66%-0.17%-2% 3.28Return from ACS47,306,34176,828,31729,521,97662% 2.30a100% CWIP RECOVERY471,564,000684,234,021212,670,02145% 4.30eIncremental Rate of Return on HCS-0.02%-0.01%0.01%-43% 3.28aIncremental Return from HCS-90,541-74,36716,174-18% Total Return47,215,80076,753,95029,538,15063% Total Expenses33,026,31361,533,89828,507,58586% 3.29TOTAL GROSS REV. REQ.80,242,113138,287,84858,045,73572% 3.30Less ATT. GG Adjustment000N/A 3.30aLess ATT. MM Adjustment71,386,314128,723,56157,337,24680% 3.31GROSS REV. REQ. UNDER ATT. O8,855,7999,564,287708,4898%

9. 9 ATXI 2016 PROJECTED NET REVENUE REQUIREMENT & TRUE UP Page.Line Jan-15Jan-16ChangePercent 1.1Gross Revenue Requirement8,855,7999,564,287708,4898% 1.6Total Revenue Credits423,000990,564567,564134% 1.6aHistoric Year Actual ATRR8,860,73910,933,0542,072,31623% 1.6bProjected ATRR from Prior Year7,406,00210,761,2943,355,29245% 1.6cPrior Year ATRR True-Up1,454,736171,760-1,282,976-88% 1.6dPrior Year Divisor True-Up-45,647-244,936-199,289437% 1.6eInterest on Prior Year True-Up9,706-4,756-14,462-149% 1.7NET REVENUE REQUIREMENT9,851,5948,495,791-1,355,803-14%

10. 10 ATXI 2014 ATTACHMENT O TRUE UP Ameren Transmission Company of Illinois Attachment O Revenue Requirement True-Up Year Ended December 31, 2014 Attachment O Net Actual Revenue Requirement (2014 Actual Attachment O, Pg 1, Line 7) $ 10,933,054 Net Projected Revenue Requirement (2014 Projected Attachment O, Pg 1, Line 7) $ 10,761,294 Under/(Over) Recovery of Net Revenue Requirement $ 171,760 Historic Year Actual Divisor for Pricing Zone (2014 Actual AIC Attachment O, Pg 1, Line 15) $ 7,205,351 Projected Year Divisor for Pricing Zone (AIC 2014 Projected Attachment O, Pg 1, Line 15) 7,045,000 Difference between Historic & Projected Yr Divisor 160,351 Prior Year Projected Annual Cost ($ per kw per yr) $ 1.53 Prior Year Under/(Over) Divisor True-up $ (244,936) Total Under/(Over) Recovery $ (73,176) Monthly Interest Rate (updated through July, 2015)0.2708% Interest For 24 Months $ (4,756) Total Under/(Over) Recovery Including Interest $ (77,932)

11. 11 ATXI 2016 PROJECTED ATTACHMENT MM ATXI Attachment MM Calculation - Page 1 (1)(2)(3)(4) Attachment O LinePage, Line, Col.TransmissionAllocator No. 1Gross Transmission Plant - TotalAttach O, p 2, line 2 + 18a col 5 (Note A) 923,168,452 1aTransmission Accumulated DepreciationAttach O, p 2, line 8 col 5 7,645,717 2Net Transmission Plant - TotalLine 1 minus Line 1a (Note B) 915,522,735 O&M TRANSMISSION EXPENSE 3Total O&M Allocated to TransmissionAttach O, p 3, line 8 col 5 12,600,037 3aTransmission O&MAttach O, p 3, line 1 col 5 1,200,387 3bLess: LSE Expenses included in above, if anyAttach O, p 3, line 1a col 5, if any - 3cLess: Account 565 included in above, if anyAttach O, p 3, line 2 col 5, if any - 3dAdjusted Transmission O&MLine 3a minus Line 3b minus Line 3c 1,200,387 4Annual Allocation Factor for Transmission O&M(Line 3d divided by line 1a, col 3)15.70% OTHER O&M EXPENSE 4aOther O&M Allocated to TransmissionLine 3 minus Line 3d 11,399,650 4bAnnual Allocation Factor for Other O&MLine 4a divided by Line 1, col 31.23% GENERAL AND COMMON (G&C) DEPRECIATION EXPENSE 5Total G&C Depreciation ExpenseAttach O, p 3, lines 10 & 11, col 5 (Note H) 1,726,458 6Annual Allocation Factor for G&C Depreciation Expense(line 5 divided by line 1 col 3)0.19% TAXES OTHER THAN INCOME TAXES 7Total Other TaxesAttach O, p 3, line 20 col 5 1,263,426 8Annual Allocation Factor for Other Taxes(line 7 divided by line 1 col 3)0.14% 9Annual Allocation Factor for Other ExpenseSum of line 4b, 6, and 81.56% INCOME TAXES 10Total Income TaxesAttach O, p 3, line 27 col 5 41,070,854 11Annual Allocation Factor for Income Taxes(line 10 divided by line 2 col 3)4.49% RETURN 12Return on Rate Base (Note I)Attach O, p 3, line 28 col 5 76,828,317 13Annual Allocation Factor for Return on Rate Base(line 12 divided by line 2 col 3)8.39% 14Annual Allocation Factor for ReturnSum of line 11 and 1312.88% HYPOTHETICAL CAPITAL STRUCTURE (HCS) RETURN 15Annual Allocation Factor HCS Return (Note J)Attach O, p 4, line 30e-0.01%0.00%

12. 12 ATXI 2016 PROJECTED ATTACHMENT MM (1)(2)(3)(4)(5)(6)(7)(8)(9) Line No.Project Name MTEP Project NumberProject Gross Plant Project Accumulated Depreciation Transmission O&M Annual Allocation Factor Annual Allocation for Transmission O&M Expense Other Expense Annual Allocation Factor Annual Allocation for Other Expense Annual Expense Charge (Note C) Page 1 line 4(Col 4 * Col 5) Page 1 line 9(Col 3 * Col 7)(Col 6 + Col 8) Multi-Value Projects (MVP) 1aPana-Sugar Creek - CWIP2237 $ 131,089,876 $ -15.70% $ -1.56% $ 2,043,313 1bPana-Sugar Creek - Plant in Service - No HCS2237 $ 40,471,137 $ 378,96715.70% $ 59,4981.56% $ 630,828 $ 690,327 1cPana-Sugar Creek - Land - No HCS2237 $ 4,524,089 $ -15.70% $ -1.56% $ 70,518 1dSidney-Rising - CWIP2239 $ 51,469,977 $ -15.70% $ -1.56% $ 802,269 1eSidney-Rising - Plant in Service - No HCS2239 $ 23,043,585 $ 184,11315.70% $ 28,9061.56% $ 359,183 $ 388,089 1fSidney-Rising - Land - No HCS2239 $ 1,285,913 $ -15.70% $ -1.56% $ 20,044 1gAdair-Ottumwa - CWIP2248 $ 4,246,263 $ -15.70% $ -1.56% $ 66,187 1hAdair-Ottumwa - Plant in Service - No HCS2248 $ - 15.70% $ -1.56% $ - 1iAdair-Ottumwa - Land - No HCS2248 $ 656,150 $ -15.70% $ -1.56% $ 10,227 1jPalmyra-Pawnee - CWIP3017 $ 370,343,131 $ -15.70% $ -1.56% $ 5,772,582 1kPalmyra-Pawnee - Plant in Service - No HCS3017 $ 87,915,462 $ 786,23115.70% $ 123,4391.56% $ 1,370,349 $ 1,493,788 1lPalmyra-Pawnee - Land - No HCS3017 $ 8,169,406 $ -15.70% $ -1.56% $ 127,337 1mFargo-Galesburg-Oak Grove - CWIP3022 $ 42,657,530 $ -15.70% $ -1.56% $ 664,908 1nFargo-Galesburg-Oak Grove - Plant in Service - No HCS3022 $ 5,160,424 $ 11,39415.70% $ 1,7891.56% $ 80,436 $ 82,225 1oFargo-Galesburg-Oak Grove - Land - No HCS3022 $ 3,396,576 $ -15.70% $ -1.56% $ 52,943 1pPawnee-Pana - CWIP3169 $ 52,724,134 $ -15.70% $ -1.56% $ 821,817 1qPawnee-Pana - Plant in Service - No HCS3169 $ 2,974,085 $ 4,68415.70% $ 7351.56% $ 46,357 $ 47,093 1rPawnee-Pana - Land - No HCS3169 $ 3,892,368 $ -15.70% $ -1.56% $ 60,671 1sAdair-Palmyra - CWIP3170 $ 31,703,109 $ -15.70% $ -1.56% $ 494,160 1tAdair-Palmyra - Plant in Service - No HCS3170 $ 2,429,690 $ 3,82715.70% $ 6011.56% $ 37,872 $ 38,473 1uAdair-Palmyra - Land - No HCS3170 $ 769,449 $ -15.70% $ -1.56% $ 11,993 ATXI Attachment MM Calculation - Page 2

13. 13 ATXI 2016 PROJECTED ATTACHMENT MM (1)(2)(10)(11)(11a)(12)(13)(14)(15)(16) Line No.Project Name MTEP Project NumberProject Net Plant Annual Allocation Factor for Return Annual Allocation Factor for HCS ReturnAnnual Return Charge Project Depreciation Expense Annual Revenue RequirementTrue-Up Adjustment MVP Annual Adjusted Revenue Requirement (Col 3 - Col 4)(Page 1 line 14)(Page 1 line 15) (Note J)(Col 10 * (Col 11 + 11a))(Note E)(Sum Col. 9, 12 & 13)(Note F) Sum Col. 14 & 15 (Note G) Multi-Value Projects (MVP) 1aPana-Sugar Creek - CWIP2237 $ 131,089,87612.88%0.00% $ 16,881,490 $ - $ 18,924,803 $ 487,836 $ 19,412,639 1bPana-Sugar Creek - Plant in Service - No HCS2237 $ 40,092,17012.88%0.00% $ 5,162,989 $ 798,172 $ 6,651,487 $ - $ 6,651,487 1cPana-Sugar Creek - Land - No HCS2237 $ 4,524,08912.88%0.00% $ 582,603 $ - $ 653,121 $ 139,393 $ 792,514 1dSidney-Rising - CWIP2239 $ 51,469,97712.88%0.00% $ 6,628,200 $ - $ 7,430,468 $ 925,675 $ 8,356,143 1eSidney-Rising - Plant in Service - No HCS2239 $ 22,859,47212.88%0.00% $ 2,943,797 $ 464,068 $ 3,795,954 $ - $ 3,795,954 1fSidney-Rising - Land - No HCS2239 $ 1,285,91312.88%0.00% $ 165,597 $ - $ 185,641 $ 98,760 $ 284,401 1gAdair-Ottumwa - CWIP2248 $ 4,246,26312.88%0.00% $ 546,825 $ - $ 613,012 $ (48,295) $ 564,717 1hAdair-Ottumwa - Plant in Service - No HCS2248 $ -12.88%0.00% $ - 1iAdair-Ottumwa - Land - No HCS2248 $ 656,15012.88%0.00% $ 84,498 $ - $ 94,725 $ (11,111) $ 83,614 1jPalmyra-Pawnee - CWIP3017 $ 370,343,13112.88%0.00% $ 47,692,041 $ - $ 53,464,623 $ 1,839,573 $ 55,304,196 1kPalmyra-Pawnee - Plant in Service - No HCS3017 $ 87,129,23112.88%0.00% $ 11,220,327 $ 1,764,313 $ 14,478,427 $ - $ 14,478,427 1lPalmyra-Pawnee - Land - No HCS3017 $ 8,169,40612.88%0.00% $ 1,052,040 $ - $ 1,179,377 $ 282,973 $ 1,462,350 1mFargo-Galesburg-Oak Grove - CWIP3022 $ 42,657,53012.88%0.00% $ 5,493,351 $ - $ 6,158,259 $ (260,136) $ 5,898,123 1nFargo-Galesburg-Oak Grove - Plant in Service - No HCS3022 $ 5,149,03112.88%0.00% $ 663,082 $ 105,660 $ 850,967 $ - $ 850,967 1oFargo-Galesburg-Oak Grove - Land - No HCS3022 $ 3,396,57612.88%0.00% $ 437,404 $ - $ 490,347 $ 117,172 $ 607,519 1pPawnee-Pana - CWIP3169 $ 52,724,13412.88%0.00% $ 6,789,708 $ - $ 7,611,525 $ 96,988 $ 7,708,513 1qPawnee-Pana - Plant in Service - No HCS3169 $ 2,969,40112.88%0.00% $ 382,393 $ 60,894 $ 490,380 $ - $ 490,380 1rPawnee-Pana - Land - No HCS3169 $ 3,892,36812.88%0.00% $ 501,251 $ - $ 561,922 $ 78,933 $ 640,855 1sAdair-Palmyra - CWIP3170 $ 31,703,10912.88%0.00% $ 4,082,662 $ - $ 4,576,823 $ 493,883 $ 5,070,706 1tAdair-Palmyra - Plant in Service - No HCS3170 $ 2,425,86412.88%0.00% $ 312,398 $ 49,748 $ 400,618 $ - $ 400,618 1uAdair-Palmyra - Land - No HCS3170 $ 769,44912.88%0.00% $ 99,088 $ - $ 111,082 $ 21,560 $ 132,642 2MVP Total Annual Revenue Requirements$128,723,561$4,263,204$132,986,765 3Rev. Req. Adj For Attachment O$128,723,561 ATXI Attachment MM Calculation - Page 2 (Continued)

14. 14 ATXI 2014 ATTACHMENT MM TRUE UP (a)(b)(c)(d)(e)(f)(g)(h)(i)(j)(k) Actual ProjectedAttachment MMActualTrue-UpApplicableTrue-Up MTEPActualAnnualRevenuesAnnualAdjustmentInterestAdjustmentTotal LineProject Attachment MMRevenueAllocatedRevenuePrincipalRate onInterestTrue-Up No.NameNumberRevenuesRequirement 1to Projects 1Requirement 1Under/(Over) Adjustment Projected[Col. (d), line 1Actual Attachment MMx (Col. (e), line 2x /Attachment MMCol. (h) x Col. (i) p 2 of 2, Col. 142Col. (e), line 3)]2p 2 of 2, Col. 142Col. (g) - Col. (f)Line 5x 24 months 2Col. (h) + Col. (j) 1 Actual Attachment MM revenues for True-Up Year 1 $ 23,828,085 2aPana-Sugar Creek - CWIP2237 5,743,325 5,313,539 5,797,022 483,4830.0375% 4,353 487,836 2bPana-Sugar Creek - Plant in Service - No HCS2237 - - - -0.0375% - - 2cPana-Sugar Creek - Land - No HCS2237 191,794 177,442 315,591 138,1490.0375% 1,244 139,393 2dSidney-Rising - CWIP2239 1,338,153 1,238,016 2,155,431 917,4150.0375% 8,260 925,675 2eSidney-Rising - Plant in Service - No HCS2239 - - - -0.0375% - - 2fSidney-Rising - Land - No HCS2239 113,109 104,645 202,524 97,8790.0375% 881 98,760 2gAdair-Ottumwa - CWIP2248 74,113 68,567 20,703 (47,864)0.0375% (431) (48,295) 2hAdair-Ottumwa - Plant in Service - No HCS2248 - - - -0.0375% - - 2iAdair-Ottumwa - Land - No HCS2248 73,406 67,913 56,901 (11,012)0.0375% (99) (11,111) 2jPalmyra-Pawnee - CWIP3017 12,663,053 11,715,449 13,538,606 1,823,1570.0375% 16,416 1,839,573 2kPalmyra-Pawnee - Plant in Service - No HCS3017 - - - -0.0375% - - 2lPalmyra-Pawnee - Land - No HCS3017 1,089,588 1,008,052 1,288,500 280,4480.0375% 2,525 282,973 2mFargo-Galesburg-Oak Grove - CWIP3022 598,737 553,932 296,117 (257,815)0.0375% (2,321) (260,136) 2nFargo-Galesburg-Oak Grove - Plant in Service - No HCS3022 - - - -0.0375% - - 2oFargo-Galesburg-Oak Grove - Land - No HCS3022 455,648 421,551 537,677 116,1260.0375% 1,046 117,172 2pPawnee-Pana - CWIP3169 1,035,565 958,071 1,054,194 96,1230.0375% 865 96,988 2qPawnee-Pana - Plant in Service - No HCS3169 - - - -0.0375% - - 2rPawnee-Pana - Land - No HCS3169 397,509 367,763 445,992 78,2290.0375% 704 78,933 2sAdair-Palmyra - CWIP3170 1,872,691 1,732,553 2,222,029 489,4760.0375% 4,407 493,883 2tAdair-Palmyra - Plant in Service - No HCS3170 - - - -0.0375% - - 2uAdair-Palmyra - Land - No HCS3170 108,729 100,593 121,961 21,3680.0375% 192 21,560 3Subtotal $ 25,755,420 $ 23,828,086 $ 28,053,248 4Under/(Over) Recovery $ 4,225,162 $ 38,042 $ 4,263,204 5Applicable Interest rate per month (expressed to four decimal places)interest rate updated through July, 20150.0375% 1 Amount excludes True-Up Adjustment, as reported in True-Up Year projected Attachment MM, page 2, column 15. 2 Rounded to whole dollars. ATXI 2014 Attachment MM True Up

15. 15 ATXI 2016 PROJECTED MVP SPEND Ameren MVPs Ameren Name2016 CAPEXMTEP #sMTEP Description Illinois Rivers$349.6 million 2237Pana - Mt. Zion - Kansas - Sugar Creek 345 kV line 2239Sidney to Rising 345 kV line 3017Palmyra-Quincy-Meredosia - Ipava & Meredosia-Pawnee 345 kV Line 3169Pawnee to Pana - 345 kV Line 3170New Palmyra Substation (Maywood) Spoon River$29.8 million 3022Fargo-Galesburg-Oak Grove 345 kV Line Mark Twain$15.9 million 2248Adair - Ottumwa 345 3170Adair-Palmyra 345 kV Line

16. 16 AMIL PRICING ZONE SCHEDULE 9 CHARGE Page.Line 2015Jan-16ChangePercent 1.7AIC Adjusted Revenue Requirement159,478,984208,895,64949,416,66531% 1.7ATXI Adjusted Revenue Requirement9,851,5948,495,791-1,355,803-14% 1.7PPI Adjusted Revenue Requirement *4,421,7787,374,7502,952,97267% Total Revenue Requirement173,752,356224,766,19051,013,83429% 1.15Ameren Illinois Divisor7,095,3357,118,19722,8610%.Annual Cost ($/kW-Yr)24.48831.5767.08829%.Network & P-to-P Rate ($/kW-Mo)2.0412.6310.59129% * PPI currently uses a historical Attachment O which is updated June 1 st each year. The amount shown for 2015 is the PPI ATRR effective as of 6/1/15. Therefore, the 2015 Annual Cost of $24.488 /kw-Yr is the current Schedule 9 rate in effect for the AMIL Pricing Zone. PPI has filed at FERC to begin using a forward looking Attachment O effective 1/1/16. PPI’s preliminary revenue requirement for 2016 is reflected above along with the projected 2016 revenue requirements for AIC and ATXI. The total 2016 projected Schedule 9 rate for the AMIL Pricing Zone is $31.576/kW-Yr.

17. QUESTIONS?

18. 18 Appendix Supplemental Background Information (Not covered during presentation)

19. 19 APPENDIX - MISO ATTACHMENTS O & MM Calculate rates for Schedules 9, 26 & 26-A Attachment GG - Schedule 26 Attachment MM - Schedule 26-A Attachment O - net revenue requirement billed under Schedule 9 Schedules 26 and 26-A are billed by MISO Schedule 9 is billed by Ameren

20. 20 APPENDIX - MISO ATTACHMENT MM Cost recovery for Multi-Value Projects (MVPs) Criteria for being considered Developed through planning process and support energy policy Multiple types of economic value across multiple pricing zones with benefit to costs > 1 Address at least one: Projected NERC violation Economic-based issue Cost shared across MISO based on load AMIL Zone is approximately 9% Ameren MVPs will primarily be built by ATXI AIC will be responsible for modifications needed to its existing facilities

21. 21 APPENDIX - MISO ATTACHMENT O & MM All transmission costs included in Attachment O calculation Schedule 9 based on net revenue requirement – reductions for: Costs recovered in Schedules 26 & 26-A Since ATXI has no Attachment GG projects, there is no deduction for 26 Revenue Credits Point-to-Point revenue in Schedules 7 & 8 Rental revenue Revenue from generator interconnections

22. 22 APPENDIX - MISO TRANSMISSION EXPANSION PLAN (MTEP) Developed on an annual basis building upon previous analysis MISO, Transmission Owners & Stakeholders Includes subregional planning meetings MTEP goals Ensure the reliability of the transmission system Ensure compliance with NERC Standards Provide economic benefits, such as increased market efficiency Facilitate public policy objectives, such as meeting Renewable Portfolio Standards Address other issues or goals identified through the stakeholder process Multiple future scenarios analyzed End result – comprehensive, cohesive plan for MISO footprint MTEP approved by MISO Board of Directors

23. 23 MISO MVPS Brief history of development Began investigating value added expansion in 2003 2008 Regional Generation Outlet Study (RGOS) - formed basis of Candidate MVP portfolio Portfolio refined due to additional analysis MISO approved portfolio of 17 Projects Seven transmission line segments (MTEP proj numbers) in Ameren territory Ameren identifies these three projects as: Illinois Rivers (four line segments) Spoon River Mark Twain (two line segments) Broadly cost-shared, AMIL pricing zone allocated 9% of each MVP no matter where project is located or who builds it

24. 24 APPENDIX - MAP OF AMEREN MVPS

25. 25 APPENDIX - RATE INCENTIVES FERC approved the following rate incentives for Illinois Rivers in Docket No. EL10-80 –CWIP (no AFUDC) –Abandonment (requires additional filing prior to recovery) –Hypothetical capital structure during construction for ATXI FERC approved similar incentives for Spoon River and Mark Twain Projects in Docket No. ER12-2216

26. 26 APPENDIX - MISO WEB LINKS Transmission Pricing - Attachments O, GG & MM Information https://www.misoenergy.org/MarketsOperations/TransmissionSettlement s/Pages/TransmissionPricing.aspxhttps://www.misoenergy.org/MarketsOperations/TransmissionSettlement s/Pages/TransmissionPricing.aspx Ameren OASIS http://www.oasis.oati.com/AMRN/index.html MTEP 15 https://www.misoenergy.org/Planning/TransmissionExpansionPlanning/ Pages/MTEP15.aspxhttps://www.misoenergy.org/Planning/TransmissionExpansionPlanning/ Pages/MTEP15.aspx Schedule 26 & 26-A Indicative Charges https://www.misoenergy.org/Planning/TransmissionExpansionPlanning/ Pages/MTEPStudies.aspxhttps://www.misoenergy.org/Planning/TransmissionExpansionPlanning/ Pages/MTEPStudies.aspx

27. 27 APPENDIX - ATXI Additional questions on these topics can be sent to Ameren at: –MISOFormulaRates@ameren.com