2016 Attachment O Projection Stakeholder MeetingAmeren Transmission Company of Illinois

October 1, 2015

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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

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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

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ATXI Revenue RequirementProjected 2015 vs Projected 2016

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ATXI 2016 PROJECTED RATE BASE

Page.Line Jan-15 Jan-16 Change Percent2.6 Total Gross Plant 80,778,000 244,237,971 163,459,971 202%

2.12 Total Accum Depreciation 4,717,000 9,096,778 4,379,778 93%2.18 TOTAL NET PLANT 76,061,000 235,141,193 159,080,193 209%

2.18a 100% CWIP RECOVERY 471,564,000 684,234,021 212,670,021 45%

ADJUSTMENTS TO RATE BASE 2.20 Account No. 282 -12,824,000 -39,416,856 -26,592,856 207%2.21 Account No. 283 -2,720,000 -3,419,130 -699,130 26%2.22 Account No. 190 2,470,000 8,262,219 5,792,219 235%2.25 Land Held for Future Use 0 0 0 N/A2.26 CWC 866,625 1,575,005 708,380 82%2.27 Materials & Supplies 0 0 0 N/A2.28 Prepayments 190,000 392,795 202,795 107%

TOTAL ADJUSTMENTS -12,017,375 -32,605,966 -20,588,591 171%

2.30 TOTAL RATE BASE 535,607,625 886,769,248 351,161,623 66%

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ATXI 2016 PROJECTED EXPENSES

Page.Line Jan-15 Jan-16 Change PercentO&M

3.1 Transmission 367,000 1,200,387 833,387 227%3.1a Less LSE Expenses 0 0 0 N/A3.2 Less Account 565 0 0 0 N/A3.3 A&G 6,566,000 11,399,650 4,833,650 74%3.4 Less FERC Annual Fees 0 0 0 N/A3.5 Less EPRI, ect. 50,000 51,164 1,164 2%

3.5a Plus Trans. Reg. Comm. Exp 50,000 51,164 1,164 2%3.8 TOTAL O&M 6,933,000 12,600,037 5,667,037 82%

3.12 TOTAL DEPRECIATION 1,132,000 6,599,581 5,467,581 483%

TAXES3.13 Payroll 0 0 0 N/A3.16 Property 0 763,426 763,426 N/A3.18 Other 155,000 500,000 345,000 223%3.27 Income Taxes 24,806,313 41,070,854 16,264,541 66%

TOTAL TAXES 24,961,313 42,334,280 17,372,967 70%

TOTAL EXPENSES 33,026,313 61,533,898 28,507,585 86%

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ATXI 2016 PROJECTED CAPITAL STRUCTURE

Capital Structure - 2015 Projection

Page.Line $ % Cost Weighted4.27 Long Term Debt 192,308,000 43.8% 0.0427 0.01874.28 Preferred Stock 0 0.0% 0.0000 0.00004.29 Common Stock 247,121,000 56.2% 0.1238 0.06964.30 Total 439,429,000 100.0% 0.0883

Capital Structure - 2016 Projection

Page.Line $ % Cost Weighted4.27 Long Term Debt 303,846,154 43.9% 0.0391 0.01724.28 Preferred Stock 0 0.0% 0.0000 0.00004.29 Common Stock 388,732,961 56.1% 0.1238 0.06954.30 Total 692,579,115 100.0% 0.0866

Change in Return -0.1684%

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ATXI 2016 PROJECTED TOTAL REVENUE REQUIREMENT

Page.Line Jan-15 Jan-16 Change Percent2.30 TOTAL RATE BASE 535,607,625 886,769,248 351,161,623 66%4.30 Rate of Return on ACS 8.83% 8.66% -0.17% -2%3.28 Return from ACS 47,306,341 76,828,317 29,521,976 62%

2.30a 100% CWIP RECOVERY 471,564,000 684,234,021 212,670,021 45%4.30e Incremental Rate of Return on HCS -0.02% -0.01% 0.01% -43%3.28a Incremental Return from HCS -90,541 -74,367 16,174 -18%

Total Return 47,215,800 76,753,950 29,538,150 63%Total Expenses 33,026,313 61,533,898 28,507,585 86%

3.29 TOTAL GROSS REV. REQ. 80,242,113 138,287,848 58,045,735 72%

3.30 Less ATT. GG Adjustment 0 0 0 N/A3.30a Less ATT. MM Adjustment 71,386,314 128,723,561 57,337,246 80%3.31 GROSS REV. REQ. UNDER ATT. O 8,855,799 9,564,287 708,489 8%

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ATXI 2016 PROJECTED NET REVENUE REQUIREMENT & TRUE UP

Page.Line Jan-15 Jan-16 Change Percent1.1 Gross Revenue Requirement 8,855,799 9,564,287 708,489 8%1.6 Total Revenue Credits 423,000 990,564 567,564 134%

1.6a Historic Year Actual ATRR 8,860,739 10,933,054 2,072,316 23%1.6b Projected ATRR from Prior Year 7,406,002 10,761,294 3,355,292 45%1.6c Prior Year ATRR True-Up 1,454,736 171,760 -1,282,976 -88%1.6d Prior Year Divisor True-Up -45,647 -244,936 -199,289 437%1.6e Interest on Prior Year True-Up 9,706 -4,756 -14,462 -149%

1.7 NET REVENUE REQUIREMENT 9,851,594 8,495,791 -1,355,803 -14%

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ATXI 2014 ATTACHMENT O TRUE UP

Ameren Transmission Company of IllinoisAttachment O Revenue Requirement True-Up

Year Ended December 31, 2014

Attachment ONet 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)

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ATXI 2016 PROJECTED ATTACHMENT MM

ATXI Attachment MM Calculation - Page 1

(1) (2) (3) (4)Attachment O

Line Page, Line, Col. Transmission AllocatorNo.

1 Gross Transmission Plant - Total Attach O, p 2, line 2 + 18a col 5 (Note A) 923,168,452 1a Transmission Accumulated Depreciation Attach O, p 2, line 8 col 5 7,645,717 2 Net Transmission Plant - Total Line 1 minus Line 1a (Note B) 915,522,735

O&M TRANSMISSION EXPENSE3 Total O&M Allocated to Transmission Attach O, p 3, line 8 col 5 12,600,037

3a Transmission O&M Attach O, p 3, line 1 col 5 1,200,387 3b Less: LSE Expenses included in above, if any Attach O, p 3, line 1a col 5, if any - 3c Less: Account 565 included in above, if any Attach O, p 3, line 2 col 5, if any - 3d Adjusted Transmission O&M Line 3a minus Line 3b minus Line 3c 1,200,387

4 Annual Allocation Factor for Transmission O&M (Line 3d divided by line 1a, col 3) 15.70% 15.70%

OTHER O&M EXPENSE4a Other O&M Allocated to Transmission Line 3 minus Line 3d 11,399,650 4b Annual Allocation Factor for Other O&M Line 4a divided by Line 1, col 3 1.23% 1.23%

GENERAL AND COMMON (G&C) DEPRECIATION EXPENSE5 Total G&C Depreciation Expense Attach O, p 3, lines 10 & 11, col 5 (Note H) 1,726,458 6 Annual Allocation Factor for G&C Depreciation Expense (line 5 divided by line 1 col 3) 0.19% 0.19%

TAXES OTHER THAN INCOME TAXES7 Total Other Taxes Attach O, p 3, line 20 col 5 1,263,426 8 Annual Allocation Factor for Other Taxes (line 7 divided by line 1 col 3) 0.14% 0.14%

9 Annual Allocation Factor for Other Expense Sum of line 4b, 6, and 8 1.56%

INCOME TAXES10 Total Income Taxes Attach O, p 3, line 27 col 5 41,070,854 11 Annual Allocation Factor for Income Taxes (line 10 divided by line 2 col 3) 4.49% 4.49%

RETURN 12 Return on Rate Base (Note I) Attach O, p 3, line 28 col 5 76,828,317 13 Annual Allocation Factor for Return on Rate Base (line 12 divided by line 2 col 3) 8.39% 8.39%

14 Annual Allocation Factor for Return Sum of line 11 and 13 12.88%

HYPOTHETICAL CAPITAL STRUCTURE (HCS) RETURN15 Annual Allocation Factor HCS Return (Note J) Attach O, p 4, line 30e -0.01% 0.00%

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ATXI 2016 PROJECTED ATTACHMENT MM

(1) (2) (3) (4) (5) (6) (7) (8) (9)

Line No. Project NameMTEP Project

Number Project Gross PlantProject 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)

1a Pana-Sugar Creek - CWIP 2237 $ 131,089,876 $ - 15.70% $ - 1.56% $ 2,043,313 $ 2,043,313 1b Pana-Sugar Creek - Plant in Service - No HCS 2237 $ 40,471,137 $ 378,967 15.70% $ 59,498 1.56% $ 630,828 $ 690,327 1c Pana-Sugar Creek - Land - No HCS 2237 $ 4,524,089 $ - 15.70% $ - 1.56% $ 70,518 $ 70,518

1d Sidney-Rising - CWIP 2239 $ 51,469,977 $ - 15.70% $ - 1.56% $ 802,269 $ 802,269

1e Sidney-Rising - Plant in Service - No HCS 2239 $ 23,043,585 $ 184,113 15.70% $ 28,906 1.56% $ 359,183 $ 388,089

1f Sidney-Rising - Land - No HCS 2239 $ 1,285,913 $ - 15.70% $ - 1.56% $ 20,044 $ 20,044

1g Adair-Ottumwa - CWIP 2248 $ 4,246,263 $ - 15.70% $ - 1.56% $ 66,187 $ 66,187

1h Adair-Ottumwa - Plant in Service - No HCS 2248 $ - $ - 15.70% $ - 1.56% $ - $ -

1i Adair-Ottumwa - Land - No HCS 2248 $ 656,150 $ - 15.70% $ - 1.56% $ 10,227 $ 10,227

1j Palmyra-Pawnee - CWIP 3017 $ 370,343,131 $ - 15.70% $ - 1.56% $ 5,772,582 $ 5,772,582

1k Palmyra-Pawnee - Plant in Service - No HCS 3017 $ 87,915,462 $ 786,231 15.70% $ 123,439 1.56% $ 1,370,349 $ 1,493,788

1l Palmyra-Pawnee - Land - No HCS 3017 $ 8,169,406 $ - 15.70% $ - 1.56% $ 127,337 $ 127,337

1m Fargo-Galesburg-Oak Grove - CWIP 3022 $ 42,657,530 $ - 15.70% $ - 1.56% $ 664,908 $ 664,908

1n Fargo-Galesburg-Oak Grove - Plant in Service - No HCS 3022 $ 5,160,424 $ 11,394 15.70% $ 1,789 1.56% $ 80,436 $ 82,225

1o Fargo-Galesburg-Oak Grove - Land - No HCS 3022 $ 3,396,576 $ - 15.70% $ - 1.56% $ 52,943 $ 52,943

1p Pawnee-Pana - CWIP 3169 $ 52,724,134 $ - 15.70% $ - 1.56% $ 821,817 $ 821,817

1q Pawnee-Pana - Plant in Service - No HCS 3169 $ 2,974,085 $ 4,684 15.70% $ 735 1.56% $ 46,357 $ 47,093

1r Pawnee-Pana - Land - No HCS 3169 $ 3,892,368 $ - 15.70% $ - 1.56% $ 60,671 $ 60,671

1s Adair-Palmyra - CWIP 3170 $ 31,703,109 $ - 15.70% $ - 1.56% $ 494,160 $ 494,160

1t Adair-Palmyra - Plant in Service - No HCS 3170 $ 2,429,690 $ 3,827 15.70% $ 601 1.56% $ 37,872 $ 38,473

1u Adair-Palmyra - Land - No HCS 3170 $ 769,449 $ - 15.70% $ - 1.56% $ 11,993 $ 11,993

ATXI Attachment MM Calculation - Page 2

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ATXI 2016 PROJECTED ATTACHMENT MM

(1) (2) (10) (11) (11a) (12) (13) (14) (15) (16)

Line No. Project NameMTEP Project

Number Project Net Plant

Annual Allocation Factor for

ReturnAnnual Allocation Factor

for HCS Return Annual Return ChargeProject Depreciation

ExpenseAnnual Revenue

Requirement True-Up AdjustmentMVP 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)

1a Pana-Sugar Creek - CWIP 2237 $ 131,089,876 12.88% 0.00% $ 16,881,490 $ - $ 18,924,803 $ 487,836 $ 19,412,639

1b Pana-Sugar Creek - Plant in Service - No HCS 2237 $ 40,092,170 12.88% 0.00% $ 5,162,989 $ 798,172 $ 6,651,487 $ - $ 6,651,487 1c Pana-Sugar Creek - Land - No HCS 2237 $ 4,524,089 12.88% 0.00% $ 582,603 $ - $ 653,121 $ 139,393 $ 792,514 1d Sidney-Rising - CWIP 2239 $ 51,469,977 12.88% 0.00% $ 6,628,200 $ - $ 7,430,468 $ 925,675 $ 8,356,143 1e Sidney-Rising - Plant in Service - No HCS 2239 $ 22,859,472 12.88% 0.00% $ 2,943,797 $ 464,068 $ 3,795,954 $ - $ 3,795,954

1f Sidney-Rising - Land - No HCS 2239 $ 1,285,913 12.88% 0.00% $ 165,597 $ - $ 185,641 $ 98,760 $ 284,401 1g Adair-Ottumwa - CWIP 2248 $ 4,246,263 12.88% 0.00% $ 546,825 $ - $ 613,012 $ (48,295) $ 564,717

1h Adair-Ottumwa - Plant in Service - No HCS 2248 $ - 12.88% 0.00% $ - $ - $ - $ - $ - 1i Adair-Ottumwa - Land - No HCS 2248 $ 656,150 12.88% 0.00% $ 84,498 $ - $ 94,725 $ (11,111) $ 83,614 1j Palmyra-Pawnee - CWIP 3017 $ 370,343,131 12.88% 0.00% $ 47,692,041 $ - $ 53,464,623 $ 1,839,573 $ 55,304,196 1k Palmyra-Pawnee - Plant in Service - No HCS 3017 $ 87,129,231 12.88% 0.00% $ 11,220,327 $ 1,764,313 $ 14,478,427 $ - $ 14,478,427 1l Palmyra-Pawnee - Land - No HCS 3017 $ 8,169,406 12.88% 0.00% $ 1,052,040 $ - $ 1,179,377 $ 282,973 $ 1,462,350 1m Fargo-Galesburg-Oak Grove - CWIP 3022 $ 42,657,530 12.88% 0.00% $ 5,493,351 $ - $ 6,158,259 $ (260,136) $ 5,898,123 1n Fargo-Galesburg-Oak Grove - Plant in Service - No HCS 3022 $ 5,149,031 12.88% 0.00% $ 663,082 $ 105,660 $ 850,967 $ - $ 850,967 1o Fargo-Galesburg-Oak Grove - Land - No HCS 3022 $ 3,396,576 12.88% 0.00% $ 437,404 $ - $ 490,347 $ 117,172 $ 607,519 1p Pawnee-Pana - CWIP 3169 $ 52,724,134 12.88% 0.00% $ 6,789,708 $ - $ 7,611,525 $ 96,988 $ 7,708,513 1q Pawnee-Pana - Plant in Service - No HCS 3169 $ 2,969,401 12.88% 0.00% $ 382,393 $ 60,894 $ 490,380 $ - $ 490,380 1r Pawnee-Pana - Land - No HCS 3169 $ 3,892,368 12.88% 0.00% $ 501,251 $ - $ 561,922 $ 78,933 $ 640,855 1s Adair-Palmyra - CWIP 3170 $ 31,703,109 12.88% 0.00% $ 4,082,662 $ - $ 4,576,823 $ 493,883 $ 5,070,706 1t Adair-Palmyra - Plant in Service - No HCS 3170 $ 2,425,864 12.88% 0.00% $ 312,398 $ 49,748 $ 400,618 $ - $ 400,618 1u Adair-Palmyra - Land - No HCS 3170 $ 769,449 12.88% 0.00% $ 99,088 $ - $ 111,082 $ 21,560 $ 132,642

2 MVP Total Annual Revenue Requirements $128,723,561 $4,263,204 $132,986,765

3 Rev. Req. Adj For Attachment O $128,723,561

ATXI Attachment MM Calculation - Page 2 (Continued)

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ATXI 2014 ATTACHMENT MM TRUE UP

(a) (b) (c) (d) (e) (f) (g) (h) (i) (j) (k) Actual Projected Attachment MM Actual True-Up Applicable True-Up MTEP Actual Annual Revenues Annual Adjustment Interest Adjustment Total

Line Project Project Attachment MM Revenue Allocated Revenue Principal Rate on Interest True-UpNo. Name Number Revenues Requirement 1 to Projects 1 Requirement 1 Under/(Over) Under/(Over) Under/(Over) Adjustment

Projected [Col. (d), line 1 Actual Attachment MM x (Col. (e), line 2x / Attachment MM Col. (h) x Col. (i) p 2 of 2, Col. 142 Col. (e), line 3)]2 p 2 of 2, Col. 142 Col. (g) - Col. (f) Line 5 x 24 months 2 Col. (h) + Col. (j)

1 Actual Attachment MM revenues for True-Up Year 1 $ 23,828,085

2a Pana-Sugar Creek - CWIP 2237 5,743,325 5,313,539 5,797,022 483,483 0.0375% 4,353 487,836 2b Pana-Sugar Creek - Plant in Service - No HCS 2237 - - - - 0.0375% - - 2c Pana-Sugar Creek - Land - No HCS 2237 191,794 177,442 315,591 138,149 0.0375% 1,244 139,393 2d Sidney-Rising - CWIP 2239 1,338,153 1,238,016 2,155,431 917,415 0.0375% 8,260 925,675 2e Sidney-Rising - Plant in Service - No HCS 2239 - - - - 0.0375% - - 2f Sidney-Rising - Land - No HCS 2239 113,109 104,645 202,524 97,879 0.0375% 881 98,760 2g Adair-Ottumwa - CWIP 2248 74,113 68,567 20,703 (47,864) 0.0375% (431) (48,295)2h Adair-Ottumwa - Plant in Service - No HCS 2248 - - - - 0.0375% - - 2i Adair-Ottumwa - Land - No HCS 2248 73,406 67,913 56,901 (11,012) 0.0375% (99) (11,111)2j Palmyra-Pawnee - CWIP 3017 12,663,053 11,715,449 13,538,606 1,823,157 0.0375% 16,416 1,839,573 2k Palmyra-Pawnee - Plant in Service - No HCS 3017 - - - - 0.0375% - - 2l Palmyra-Pawnee - Land - No HCS 3017 1,089,588 1,008,052 1,288,500 280,448 0.0375% 2,525 282,973

2m Fargo-Galesburg-Oak Grove - CWIP 3022 598,737 553,932 296,117 (257,815) 0.0375% (2,321) (260,136)2n Fargo-Galesburg-Oak Grove - Plant in Service - No HCS 3022 - - - - 0.0375% - - 2o Fargo-Galesburg-Oak Grove - Land - No HCS 3022 455,648 421,551 537,677 116,126 0.0375% 1,046 117,172 2p Pawnee-Pana - CWIP 3169 1,035,565 958,071 1,054,194 96,123 0.0375% 865 96,988 2q Pawnee-Pana - Plant in Service - No HCS 3169 - - - - 0.0375% - - 2r Pawnee-Pana - Land - No HCS 3169 397,509 367,763 445,992 78,229 0.0375% 704 78,933 2s Adair-Palmyra - CWIP 3170 1,872,691 1,732,553 2,222,029 489,476 0.0375% 4,407 493,883 2t Adair-Palmyra - Plant in Service - No HCS 3170 - - - - 0.0375% - - 2u Adair-Palmyra - Land - No HCS 3170 108,729 100,593 121,961 21,368 0.0375% 192 21,560 3 Subtotal $ 25,755,420 $ 23,828,086 $ 28,053,248

4 Under/(Over) Recovery $ 4,225,162 $ 38,042 $ 4,263,204

5 Applicable Interest rate per month (expressed to four decimal places) interest rate updated through July, 2015 0.0375%

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

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ATXI 2016 PROJECTED MVP SPEND

Ameren MVPsAmeren Name 2016 CAPEX MTEP #s MTEP Description

Illinois Rivers $349.6 million

2237 Pana - Mt. Zion - Kansas - Sugar Creek 345 kV line2239 Sidney to Rising 345 kV line3017 Palmyra-Quincy-Meredosia - Ipava & Meredosia-Pawnee 345 kV Line3169 Pawnee to Pana - 345 kV Line3170 New Palmyra Substation (Maywood)

Spoon River $29.8 million

3022 Fargo-Galesburg-Oak Grove 345 kV Line   

Mark Twain $15.9 million

2248 Adair - Ottumwa 3453170 Adair-Palmyra 345 kV Line

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AMIL PRICING ZONE SCHEDULE 9 CHARGE

Page.Line 2015 Jan-16 Change Percent1.7 AIC Adjusted Revenue Requirement 159,478,984 208,895,649 49,416,665 31%1.7 ATXI Adjusted Revenue Requirement 9,851,594 8,495,791 -1,355,803 -14%1.7 PPI Adjusted Revenue Requirement * 4,421,778 7,374,750 2,952,972 67%

Total Revenue Requirement 173,752,356 224,766,190 51,013,834 29%1.15 Ameren Illinois Divisor 7,095,335 7,118,197 22,861 0%

. Annual Cost ($/kW-Yr) 24.488 31.576 7.088 29%

. Network & P-to-P Rate ($/kW-Mo) 2.041 2.631 0.591 29%

* PPI currently uses a historical Attachment O which is updated June 1st 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.

QUESTIONS?

18

AppendixSupplemental Background Information

(Not covered during presentation)

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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

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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

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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

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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

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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

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APPENDIX - MAP OF AMEREN MVPS

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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

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APPENDIX - MISO WEB LINKS

• Transmission Pricing - Attachments O, GG & MM Information• https

://www.misoenergy.org/MarketsOperations/TransmissionSettlements/Pages/TransmissionPricing.aspx

• Ameren OASIS• http://www.oasis.oati.com/AMRN/index.html

• MTEP 15• https://www.misoenergy.org/Planning/TransmissionExpansionPlanning/

Pages/MTEP15.aspx• Schedule 26 & 26-A Indicative Charges

• https://www.misoenergy.org/Planning/TransmissionExpansionPlanning/Pages/MTEPStudies.aspx

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APPENDIX - ATXI

• Additional questions on these topics can be sent to Ameren at:– MISOFormulaRates@ameren.com