2014 Attachment O True-Up Stakeholder MeetingAmeren Illinois Company

July 29, 2015

2

AGENDA

Main Purpose is to review AIC 2014 Transmission Rate True-Up Calculations

• Timeline• AIC 2014 True Up• 2014 AMIL Pricing Zone NITS Charge

An additional meeting will be held in October to review the 2016

Projected Transmission Rate calculations.

3

NEW PROTOCOL TIMELINE

DateSchedule

(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

AIC Revenue Requirement

Projected 2014 vs Actual 2014

5

AIC 2014 ATTACHMENT O TRUE UP

Ameren Illinois Company - AIC

Attachment O Revenue Requirement True-Up

Year Ended December 31, 2014

Attachment O

Net Actual Revenue Requirement (Attachment O, Pg 1, Line 7a) $153,084,880

Net Projected Revenue Requirement (2014 Projected Attachment O, Pg 1, Line 7a) $143,000,924

Under/(Over) Recovery of Net Revenue Requirement $10,083,956

Historic Year Actual Divisor for Pricing Zone (Attachment O, Pg 1, Line 15) 7,205,351

Projected Year Divisor for Pricing Zone (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) $20.2982

Prior Year Under/(Over) Divisor True-up $(3,254,838)

Total Under/(Over) Recovery $6,829,118

Monthly Interest Rate (to be updated through July, 2015) 0.0265%

Interest For 24 Months $43,433

Total Under/(Over) Recovery Including Interest $6,872,551

(Amount to be included in Projected 2016 Attachment O)

6

AIC 2014 RATE BASE

Page.Line 2014 Projection 2014 Actual Change Percent2.6 Total Gross Plant 1,327,622,018 1,366,240,974 38,618,956 3%

2.12 Total Accum Depreciation 465,639,921 459,871,993 -5,767,928 -1%2.18 TOTAL NET PLANT 861,982,097 906,368,981 44,386,884 5%

2.18a 100% CWIP RECOVERY 0 7,301,137 7,301,137 N/A

ADJUSTMENTS TO RATE BASE 0 N/A2.20 Account No. 282 -229,080,460 -248,516,533 -19,436,073 8%2.21 Account No. 283 -17,757,369 -6,008,729 11,748,639 -66%2.22 Account No. 190 40,041,062 35,690,801 -4,350,262 -11%2.23 Account No. 255 0 0 0 N/A2.25 Land Held for Future Use 425,040 2,363,867 1,938,827 456%2.26 CWC 4,767,079 5,276,084 509,004 11%2.27 Materials & Supplies 8,000,238 11,405,051 3,404,813 43%2.28 Prepayments 1,049,481 1,469,725 420,245 40%

TOTAL ADJUSTMENTS -192,554,928 -198,319,736 -5,764,807 3%

2.30 TOTAL RATE BASE 669,427,168 715,350,382 45,923,214 7%

7

AIC 2014 EXPENSES

Page.Line 2014 Projection 2014 Actual Change PercentO&M

3.1 Transmission 42,031,093 44,551,839 2,520,746 6%3.1a Less LSE Expenses 2,577,054 1,495,616 -1,081,438 -42%3.2 Less Account 565 13,190,160 14,086,181 896,021 7%3.3 A&G 12,184,795 13,067,946 883,152 7%3.4 Less FERC Annual Fees 0 0 0 N/A3.5 Less EPRI, ect. 408,626 338,476 -70,150 -17%3.5a Plus Trans. Reg. Comm. Exp 96,587 509,156 412,569 427%3.8 TOTAL O&M 38,136,635 42,208,668 4,072,033 11%

3.12 TOTAL DEPRECIATION 22,612,545 24,585,112 1,972,567 9%

TAXES 0 N/A3.13 Payroll 894,566 747,864 -146,701 -16%3.16 Property 1,048,910 861,889 -187,021 -18%3.18 Other 388,574 304,307 -84,266 -22%3.27 Income Taxes 31,970,516 35,087,815 3,117,299 10%

TOTAL TAXES 34,302,566 37,001,876 2,699,310 8%

TOTAL EXPENSES 95,051,746 103,795,656 8,743,910 9%

8

AIC 2014 CAPITAL STRCUTURE

Capital Structure - 2014 Projection

Page.Line $ % Cost Weighted4.27 Long Term Debt 1,972,228,239 43% 0.0615 0.02674.28 Preferred Stock 61,721,350 1% 0.0490 0.00074.29 Common Stock 2,508,477,417 55% 0.1238 0.06844.3 Total 4,542,427,006 100% 0.0957

Capital Structure - 2014 Actual

Page.Line $ % Cost Weighted4.27 Long Term Debt 1,850,078,816 42% 0.0567 0.02384.28 Preferred Stock 61,632,375 1% 0.0491 0.00074.29 Common Stock 2,484,591,823 57% 0.1238 0.07004.3 Total 4,396,303,014 100% 0.0945

Change in Return -0.1217%

9

AIC 2014 TOTAL REVENUE REQUIREMENT

Page.Line 2014 Projection 2014 Actual Change Percent2.30 TOTAL RATE BASE 669,427,168 715,350,382 45,923,214 7%4.30 Rate of Return 9.57% 9.45% -0.12% -1%3.28 Return 64,074,874 67,599,532 3,524,658 6%

Total Expenses 95,051,746 103,795,656 8,743,910 9%3.29 TOTAL GROSS REV. REQ. 159,126,620 171,395,188 12,268,568 8%

3.30 Less ATT. GG Adjustment 5,567,662 5,966,673 399,011 7%3.30a Less ATT. MM Adjustment 0 1,209,584 1,209,584 N/A3.31 GROSS REV. REQ. UNDER ATT. O 153,558,958 164,218,931 10,659,973 7%

10

AIC 2014 TRUE UP & NET REVENUE REQUIREMENT

* AIC did not use a projected calculation in 2012, so there is no prior year True-up included in 2014.

Page.Line 2014 Projection 2014 Actual Change Percent1.1 Gross Revenue Requirement 153,558,958 164,218,931 10,659,973 7%1.6 Total Revenue Credits 10,558,034 11,134,050 576,016 5%

1.6a Historic Year Actual ATRR * 0 0 0 N/A1.6b Projected ATRR from Prior Year 0 0 0 N/A1.6c Prior Year ATRR True-Up 0 0 0 N/A1.6d Prior Year Divisor True-Up 0 0 0 N/A1.6e Interest on Prior Year True-Up 0 0 0 N/A

1.7a NET REVENUE REQUIREMENT 143,000,924 153,084,880 10,083,956 7%1.7b Prairie Power 0 0 0 N/A1.7 AIC Adjusted Revenue Requirement 143,000,924 153,084,880 10,083,956 7%

11

AIC 2014 ATTACHMENT GG

AIC Attachment GG Calculation - Page 1 (1) (2) (3) (4)

Attachment OLine Page, Line, Col. Transmission AllocatorNo.

1 Gross Transmission Plant - Total Attach O, p 2, line 2 col 5 (Note A) 1,329,522,3592 Net Transmission Plant - Total Attach O, p 2, line 14 and 23b col 5 (Note B) 884,276,054

O&M EXPENSE3 Total O&M Allocated to Transmission Attach O, p 3, line 8 col 5 42,208,6684 Annual Allocation Factor for O&M (line 3 divided by line 1 col 3) 3.17% 3.17%

GENERAL AND COMMON (G&C) DEPRECIATION EXPENSE5 Total G&C Depreciation Expense Attach O, p 3, lines 10 & 11, col 5 (Note H) 1,890,0026 Annual Allocation Factor for G&C Depreciation Expense (line 5 divided by line 1 col 3) 0.14% 0.14%

TAXES OTHER THAN INCOME TAXES7 Total Other Taxes Attach O, p 3, line 20 col 5 1,914,0618 Annual Allocation Factor for Other Taxes (line 7 divided by line 1 col 3) 0.14% 0.14%

9 Annual Allocation Factor for Expense Sum of line 4, 6, and 8 3.46%

INCOME TAXES10 Total Income Taxes Attach O, p 3, line 27 col 5 35,087,81511 Annual Allocation Factor for Income Taxes (line 10 divided by line 2 col 3) 3.97% 3.97%

RETURN 12 Return on Rate Base Attach O, p 3, line 28 col 5 67,599,53213 Annual Allocation Factor for Return on Rate Base (line 12 divided by line 2 col 3) 7.64% 7.64%

14 Annual Allocation Factor for Return Sum of line 11 and 13 11.61%

12

AIC 2014 ATTACHMENT GG

AIC Attachment GG Calculation - Page 2 (1) (2) (3) (4) (5) (6)

Line No.   Project Name

MTEP Project Number

Project Gross Plant

Annual Allocation Factor for Expense

Annual Expense Charge Project Net Plant

        (Note C) (Page 1 line 9) (Col. 3 * Col. 4) (Note D)     

1a Wood River-Roxford 1502 138kV line 728 $ 3,424,487 3.46% $118,516.25

$ 3,046,429

1b Sidney-Paxton 138kV Reconductor 18 miles 870 $ 5,994,479 3.46% $207,459.73

$ 5,294,859

1c Coffeen Plant-Coffeen, North - 2nd. Bus tie 2829 $ 5,592,558 3.46% $193,549.86

$ 5,243,540

1d Latham - Oreana 8.5 mile 345kV line 2068 $ 21,649,051 3.46% $749,240.47

$ 21,431,303

1eBrokaw-S. Bloom 345/138kV Trans & 345kV line 2069

$ 106,683 3.46% $3,692.13

$ 106,522

1fFargo-Mapleridge-20 mile 345kV line & New Sub 2472

$ - 3.46% $0.00

$ -

               

(1) (2) (7) (8) (9) (10) (11) (12)

Line No.   Project Name

MTEP Project Number

Annual Allocation Factor for Return

Annual Return Charge

Project Depreciation

ExpenseAnnual Revenue

RequirementTrue-Up

AdjustmentNetwork

Upgrade Charge

        (Page 1 line 14) (Col. 6 * Col. 7) (Note E) (Sum Col. 5, 8 & 9) (Note F)Sum Col. 10 & 11

(Note G)     1a Wood River-Roxford 1502 138kV line 728 11.61% $353,769 $52,502 $524,788 $ - 524,7881b Sidney-Paxton 138kV Reconductor 18 miles 870 11.61% $614,870 $99,719 $922,049 $ - 922,049

1c Coffeen Plant-Coffeen, North - 2nd. Bus tie 2829 11.61% $608,911 $98,012 $900,473 $ - 900,473

1d Latham - Oreana 8.5 mile 345kV line 2068 11.61% $2,488,729 $363,763 $3,601,732 $ - 3,601,732

1eBrokaw-S. Bloom 345/138kV Trans & 345kV line 2069 11.61% $12,370 $1,570 $17,632

$ - 17,632

1fFargo-Mapleridge-20 mile 345kV line & New Sub 2472 11.61% $0 $0 $0

$ - 0

                   

2 Annual Totals $5,966,673 $0 $5,966,673

3 Rev. Req. Adj For Attachment O $5,966,673

13

AIC 2014 ATTACHMENT GG TRUE-UP

AIC 2014 Attachment GG True Up

(a) (b) (c) (d) (e) (f) (g) (h) (i) (j) (k) Actual Projected Attachment GG Actual True-Up Applicable True-Up MTEP Actual Annual Revenues Annual Adjustment Interest Adjustment TotalLine Project Project Attachment GG 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 GG x (Col. (e), line 2x / Attachment GGCol. (h) x Col.

(i)

p 2 of 2, Col. 102 Col. (e), line 3)]2 p 2 of 2, Col. 102Col. (g) - Col.

(f) Line 5 x 24 months 2 Col. (h) + Col. (j)

1Actual Attachment GG revenues for True-Up Year 1 $ 5,755,759

2a Wood River-Roxford 1502 138kV line 728 527,494 545,315 524,788 (20,527) 0.0265% (131) (20,658)2b Sidney-Paxton 138kV Reconductor 18 miles 870 935,340 966,939 922,049 (44,890) 0.0265% (286) (45,176)2c Coffeen Plant-Coffeen, North - 2nd. Bus tie 2829 873,483 902,993 900,473 (2,520) 0.0265% (16) (2,536)2d Latham - Oreana 8.5 mile 345kV line 2068 3,231,345 3,340,512 3,601,732 261,220 0.0265% 1,661 262,881 2e Brokaw-S. Bloom 345/138kV Trans & 345kV line 2069 - - 17,632 17,632 0.0265% 112 17,744 2f Fargo-Mapleridge-20 mile 345kV line & New Sub 2472 - - - - 0.0265% - - 3 Subtotal $ 5,567,662 $ 5,755,759 $ 5,966,674

4 Under/(Over) Recovery $ 210,915 $ 1,340 $ 212,255

5 Applicable Interest rate per month (expressed to four decimal places) Interest Rate to be updated through July 2015 0.0265%

1 Amount excludes True-Up Adjustment, as reported in True-Up Year projected Attachment GG, page 2, column 11.2 Rounded to whole dollars.

14

AIC 2014 ATTACHMENT MM

AIC Attachment MM Calculation - Page 1 (1) (2) (3) (4)

Attachment OLine Page, Line, Col. Transmission AllocatorNo.

1 Gross Transmission Plant - Total Attach O, p 2, line 2 col 5 (Note A) 1,329,522,359 1a Transmission Accumulated Depreciation Attach O, p 2, line 8 col 5 445,246,305 2 Net Transmission Plant - Total Line 1 minus Line 1a (Note B) 884,276,054

O&M TRANSMISSION EXPENSE3 Total O&M Allocated to Transmission Attach O, p 3, line 8 col 5 42,208,668 3a Transmission O&M Attach O, p 3, line 1 col 5 44,551,839 3b Less: LSE Expenses included in above, if any Attach O, p 3, line 1a col 5, if any 1,495,616 3c Less: Account 565 included in above, if any Attach O, p 3, line 2 col 5, if any 14,086,181 3d Adjusted Transmission O&M Line 3a minus Line 3b minus Line 3c 28,970,042

4 Annual Allocation Factor for Transmission O&M (Line 3d divided by line 1a, col 3) 6.51% 6.51%

OTHER O&M EXPENSE4a Other O&M Allocated to Transmission Line 3 minus Line 3d 13,238,626 4b Annual Allocation Factor for Other O&M Line 4a divided by Line 1, col 3 1.00% 1.00%

GENERAL AND COMMON (G&C) DEPRECIATION EXPENSE5 Total G&C Depreciation Expense Attach O, p 3, lines 10 & 11, col 5 (Note H) 1,890,002 6 Annual Allocation Factor for G&C Depreciation Expense (line 5 divided by line 1 col 3) 0.14% 0.14%

TAXES OTHER THAN INCOME TAXES7 Total Other Taxes Attach O, p 3, line 20 col 5 1,914,061 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 1.28% 1.28%

INCOME TAXES10 Total Income Taxes Attach O, p 3, line 27 col 5 35,087,815 11 Annual Allocation Factor for Income Taxes (line 10 divided by line 2 col 3) 3.97% 3.97%

RETURN 12 Return on Rate Base Attach O, p 3, line 28 col 5 67,599,532 13 Annual Allocation Factor for Return on Rate Base (line 12 divided by line 2 col 3) 7.64% 7.64%

14 Annual Allocation Factor for Return Sum of line 11 and 13 11.61%

15

AIC 2014 ATTACHMENT MM

AIC Attachment MM Calculation - Page 2

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

Line No.   Project Name

MTEP Project Number

Project 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)    

1a Pana-Sugar Creek - CWIP 2237 $ 786,204

$ - 6.51%

$ - 1.28% $10,078.08 $10,078.08

1b   Pana-Sugar Creek - Plant in Service 2237 $ 31,702

$ 27 6.51%

$ 2 1.28% $406.38 $408.14

1c   Pana-Sugar Creek - Land 2237 $ 11,763

$ - 6.51%

$ - 1.28% $150.79 $150.79

1d Sidney-Rising - CWIP 2239 $ 94,021

$ - 6.51%

$ - 1.28% $1,205.22 $1,205.22

1e   Sidney-Rising - Plant in Service 2239 $ -

$ - 6.51%

$ - 1.28% $0.00 $0.00

1f Palmyra-Pawnee - CWIP 3017 $ 6,396,360

$ - 6.51%

$ - 1.28% $81,992.74 $81,992.74

1g   Palmyra-Pawnee - Plant in Service 3017 $ 1,820,831

$ 2,823 6.51%

$ 184 1.28% $23,340.61 $23,524.31

1h Fargo-Galesburg-Oak Grove - CWIP 3022 $ 72

$ - 6.51%

$ - 1.28% $0.92 $0.92

1i   Fargo-Galesburg-Oak Grove - Plant 3022 $ -

$ - 6.51%

$ - 1.28% $0.00 $0.00

1j Pawnee-Pana - CWIP 3169 $ 24,481

$ - 6.51%

$ - 1.28% $313.81 $313.81

1k   Pawnee-Pana - Plant in Service 3169 $ -

$ - 6.51%

$ - 1.28% $0.00 $0.00

                     

16

AIC 2014 ATTACHMENT MM

AIC Attachment MM Calculation - Page 2 (continued) (1) (2) (10) (11) (12) (13) (14) (15) (16)

Line No.   Project Name

MTEP Project Number

Project Net Plant

Annual Allocation Factor for Return

Annual Return Charge

Project Depreciation

Expense

Annual Revenue

RequirementTrue-Up

Adjustment

MVP Annual Adjusted Revenue

Requirement

        (Col 3 - Col 4) (Page 1 line 14) (Col 10 * Col 11) (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 $ 786,204 11.61%

$ 91,299

$ -

$ 101,377

$ - $ 101,377

1b   Pana-Sugar Creek - Plant in Service 2237 $ 31,675 11.61%

$ 3,678

$ 352

$ 4,438

$ - $ 4,438

1c   Pana-Sugar Creek - Land 2237 $ 11,763 11.61%

$ 1,366

$ -

$ 1,517

$ - $ 1,517

1d Sidney-Rising - CWIP 2239 $ 94,021 11.61%

$ 10,918

$ -

$ 12,123

$ - $ 12,123

1e   Sidney-Rising - Plant in Service 2239 $ - 11.61%

$ -

$ -

$ -

$ - $ -

1f Palmyra-Pawnee - CWIP 3017 $ 6,396,360 11.61%

$ 742,783

$ -

$ 824,776

$ - $ 824,776

1g   Palmyra-Pawnee - Plant in Service 3017 $ 1,818,008 11.61%

$ 211,118

$ 27,545

$ 262,187

$ - $ 262,187

1h Fargo-Galesburg-Oak Grove - CWIP 3022 $ 72 11.61%

$ 8

$ -

$ 9

$ - $ 9

1i   Fargo-Galesburg-Oak Grove - Plant 3022 $ - 11.61%

$ -

$ -

$ -

$ - $ -

1j Pawnee-Pana - CWIP 3169 $ 24,481 11.61%

$ 2,843

$ -

$ 3,157

$ - $ 3,157

1k   Pawnee-Pana - Plant in Service 3169 $ - 11.61%

$ -

$ -

$ -

$ - $ -

                     

2 MVP Total Annual Revenue Requirements $1,209,584 $0 $1,209,584

3 Rev. Req. Adj For Attachment O $1,209,584

17

AIC 2014 ATTACHMENT MM TRUE-UP

AIC 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-Up

No. 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 $ -

2a Pana-Sugar Creek - CWIP 2237 - - 101,377 101,377 0.0265% 645 102,022

2b Pana-Sugar Creek - Plant in Service 2237 - - 4,438 4,438 0.0265% 28 4,466

2c Pana-Sugar Creek - Land 2237 - - 1,517 1,517 0.0265% 10 1,527

2d Sidney-Rising - CWIP 2239 - - 12,123 12,123 0.0265% 77 12,200

2e Sidney-Rising - Plant in Service 2239 - - - - 0.0265% - -

2f Palmyra-Pawnee - CWIP 3017 - - 824,776 824,776 0.0265% 5,246 830,022

2g Palmyra-Pawnee - Plant in Service 3017 - - 262,187 262,187 0.0265% 1,668 263,855

2h Fargo-Galesburg-Oak Grove - CWIP 3022 - - 9 9 0.0265% - 9

2i Fargo-Galesburg-Oak Grove - Plant 3022 - - - - 0.0265% - -

2j Pawnee-Pana - CWIP 3169 - - 3,157 3,157 0.0265% 20 3,177

2k Pawnee-Pana - Plant in Service 3169 - - - - 0.0265% - -

3 Subtotal $ - $ - $ 1,209,584

4 Under/(Over) Recovery $ 1,209,584 $ 7,694 $ 1,217,278

5 Applicable Interest rate per month (expressed to four decimal places) Interest Rate to be updated through July 2015 0.0265%

1 Amount excludes True-Up Adjustment, as reported in True-Up Year projected Attachment MM, page 2, column 15.2 Rounded to whole dollars.

18

AIC 2014 MVP SPEND

Ameren MVPsAmeren Name 2014 CAPEX MTEP #s MTEP Description

Illinois Rivers $16.07 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 Line

Spoon River $0 million

3022 Fargo-Galesburg-Oak Grove 345 kV Line   

19

2014 SIGNIFICANT TRANSMISSION PROJECTS ADDED TO PLANT

Project Name Total CostBondville Route 10 $36.0 Various ROW projects $19.8 Various IL Rivers $12.3 East Quincy-Meredosia 2 $11.7 Hennepin-Oglesby $10.9 Cahokia-Turkey Hill $10.8 Havana-Galesburg-Monmouth $9.2 East Quincy-Meredosia 1 $9.1 ADM Decatur $7.4 Fogarty Substation $7.3 Salem West-Mt. Vernon West $6.1 Paxton - Rantoul $5.8

QUESTIONS?

21

Appendix

Supplemental Background Information

(Not covered during presentation)

22

APPENDIX – AMIL PRICING ZONE

• Both AIC and ATXI are transmission owning subsidiaries of Ameren

Corporation, as well as a MISO Transmission Owners (TOs)• AIC will continue to build and own traditional reliability projects• ATXI is in the process of building and will own new regional

transmission projects• Prairie Power, Inc. became a TO in the AMIL pricing zone effective

June 1, 2013.• The sum of all there Attachment O net revenue requirements equals

the total revenue requirement for AMIL pricing zone to be collected under Schedule 9 (NITS)

23

APPENDIX - MISO ATTACHMENTS O, GG & 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

24

APPENDIX - MISO ATTACHMENT GG

• Cost Recovery for certain Network Upgrades• Eligible projects

• Market Efficiency• Generator Interconnections

• Cost shared based upon project type• MISO-wide based on load• Subregional based on LODF (Line Outage Distribution Factor)

• AIC has four Attachment GG projects completed• Two additional projects under construction

• These projects were approved by MISO under prior Tariff provisions which allowed limited cost sharing for certain reliability projects

25

APPENDIX - MISO ATTACHMENT MM

• Cost recovery for Multi-Value Projects (MVPs)• Very similar format as Attachment GG• 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

26

APPENDIX - MISO ATTACHMENT O, GG & 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• Revenue Credits

• Point-to-Point revenue in Schedules 7 & 8• Rental revenue• Revenue from generator interconnections

27

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

28

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

29

APPENDIX - MAP OF AMEREN MVPS

30

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

31

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 14• https://www.misoenergy.org/Planning/TransmissionExpansionPlanning/

Pages/MTEP14.aspx

• 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 – AIC

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