1. 2019 Attachment O Projection Stakeholder Meeting
Ameren Illinois Company
September 27, 2018

2. Purpose is to review 2019 Projected Transmission Rate Calculations
Agenda
Purpose is to review 2019 Projected Transmission Rate Calculations
Protocol Timeline
ROE Complaint Cases
AIC 2019 Projected Calculations
Attachment O
Attachment GG
Attachment MM
2019 AMIL Pricing Zone NITS Charge
Significant Projects Projected to be Placed in Service in 2019
ER filing to remove double averaging from ADIT proration

3. (Forward-Looking Protocols)
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
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. ROE complaints MISO ROE Complaints RTO Adder (ER15-358)
1st Complaint (EL14-12)
Covers November 12, 2013 through February 11, 2015
FERC order received September 28, 2016; set the Base ROE at 10.32%
Applicable going forward until 2nd complaint order
2nd Complaint (EL15-45)
Covers February 12, 2015 through May 11, 2016
Initial decision issued June 30, 2016; recommended Base ROE at 9.70%
Additional refunds will be required upon receipt of Final Order
RTO Adder (ER15-358)
FERC approved a 50 basis point adder for participation in an RTO
Effective January 6, 2015, applicable to complaint case refunds after that date and going forward (i.e., total ROE is now 10.82%)

5. MISO ROE for the 2017 True-Up and 2019 Projection is 10.82%
ROE complaints
MISO ROE for the 2017 True-Up and 2019 Projection is 10.82%
Refunds already provided for EL14-12
Two phase process
Phase 1 related to ROE impact on projected rates for forward looking TOs and annual updates for historical TOs. These were settled in February 2017.
2013, 2014 & 2015 projected rates from 11/12/13 to 2/11/15
Phase 2 related to the ROE impact on true-ups calculations for forward looking TOs. These were settled in June 2017.
2013, 2014 & 2015 True-ups included in 2015, 2016 and 2017 projected rates
Refunds for Schedules 7, 8, 26, 37, 38, 26A were completed by MISO
Refunds for Schedule 9 were completed by Ameren
Schedule 9 Refund amounts and supporting documents are posted on Ameren’s OASIS

6. AIC Revenue Requirement
Projected 2018 vs Projected 2019
(Projected 2018 = Current Effective Calculation at FIT of 21%)

7. Aic 2019 PROJECTED rate base
Page.Line
2018 projection
2019 projection
Change
Percent
2.6
Total Gross Plant
2,603,238,875
3,000,564,439
397,325,564
15%
2.12
Total Accum Depreciation
541,401,482
561,374,752
19,973,271 4%
2.18
TOTAL NET PLANT
2,061,837,394
2,439,189,687
377,352,293
18%
2.18a
100% CWIP RECOVERY
N/A
ADJUSTMENTS TO RATE BASE
2.20
Account No. 282
-520,626,834
-578,714,537
-58,087,704
11%
2.21
Account No. 283
-20,366,151
-16,130,247
4,235,905
-21%
2.22
Account No. 190
44,543,127
19,857,413
-24,685,713
-55%
2.23
Account No. 255
2.25
Land Held for Future Use
2,438,967
2,184,720
-254,247
-10%
2.26
CWC
6,655,963
6,518,359
-137,604
-2%
2.27
Materials & Supplies
14,460,942
13,917,485
-543,457
-4%
2.28
Prepayments
1,946,709
2,059,694
112,986 6%
TOTAL ADJUSTMENTS
-470,947,278
-550,307,112
-79,359,834
17%
2.30
TOTAL RATE BASE
1,590,890,116
1,888,882,575
297,992,459
19%

8. Aic 2019 PROJECTED expenses
Page.Line
2018 projection
2019 projection
Change
Percent
O&M
3.1
Transmission
59,219,133
61,302,668
2,083,535 4%
3.1a
Less LSE Expenses
1,444,779
1,652,145
207,366
14%
3.2
Less Account 565
21,760,225
23,468,499
1,708,274 8%
3.3
A&G
17,175,591
16,045,812
-1,129,780
-7%
3.4
Less FERC Annual Fees -
N/A
3.5
Less EPRI, etc.
227,761
302,480
74,719
33%
3.5a
Plus Trans. Reg. Comm. Exp
285,746
221,518
-64,227
-22%
3.8
TOTAL O&M
53,247,705
52,146,874
-1,100,830
-2%
3.12
TOTAL DEPRECIATION
49,739,417
57,023,172
7,283,755
15%
TAXES
3.13
Payroll
911,941
906,403
-5,538
-1%
3.16
Property
1,468,525
1,587,584
119,059
3.18
Other
510,091
606,531
96,440
19%
3.27
Income Taxes *
35,529,571
35,010,968
-518,604
TOTAL TAXES
38,420,128
38,111,486
-308,642
TOTAL EXPENSES
141,407,250
147,281,533
5,874,283
* The 2019 projected income taxes include the adjustments related to Docket ER (discussed at 2017 TU meeting).

9. Aic 2019 PROJECTED Capital structure
Capital Structure Projection
Page.Line $ %
Cost
Weighted
4.27
Long Term Debt
3,011,659,846
47.40%
0.0511
0.0242
4.28
Preferred Stock
61,632,375
0.97%
0.0491
0.0005
4.29
Common Stock
3,280,381,766
51.63%
0.1082
0.0559
4.3
Total
6,353,673,988
100.0%
0.0806
Capital Structure Projection
3,390,817,692
47.13%
0.0441
0.0208
0.86%
0.0004
3,741,582,819
52.01%
0.0563
7,194,032,886
0.0775
Change in Return %

10. Aic 2019 PROJECTED total revenue requirement
Page.Line
2018 projection
2019 projection
Change
Percent
2.30
TOTAL RATE BASE
1,590,890,116
1,888,882,575
297,992,459
19%
4.30
Rate of Return
8.06%
7.75%
-0.31%
-4%
3.28
Return
128,197,463
146,311,389
18,113,925
14%
Total Expenses
141,407,250
147,281,533
5,874,283 4%
3.29
TOTAL GROSS REV. REQ.
269,604,713
293,592,922
23,988,208 9%
3.30
Less ATT. GG Adjustment
14,560,941
13,342,032
-1,218,909
-8%
3.30a
Less ATT. MM Adjustment
12,400,665
11,692,347
-708,318
-6%
3.31
GROSS REV. REQ. UNDER ATT. O
242,643,107
268,558,543
25,915,435
11%

11. Aic 2019 PROJECTED true-up & Net revenue requirement
Page.Line
2018 projection
2019 projection
Change
Percent
1.1
Gross Revenue Requirement
242,643,107
268,558,543
25,915,435
11%
1.6
Total Revenue Credits
13,569,507
13,288,815
(280,691)
-2%
1.6a
Historic Year Actual ATRR
208,996,125
224,812,900
15,816,775 8%
1.6b
Projected ATRR from Prior Year
204,663,896
223,599,780
18,935,884 9%
1.6c
Prior Year ATRR True-Up
4,332,229
1,213,120
(3,119,109)
-72%
1.6d
Prior Year Divisor True-Up
3,530,885
13,944,992
10,414,107
295%
1.6e
Interest on Prior Year True-Up
131,345
514,042
382,697
291%
1.7a
NET REVENUE REQUIREMENT
237,068,060
270,941,881
33,873,821
14%
1.7b
Prairie Power
1.7
AIC Adjusted Revenue Requirement

12. Aic 2017 attachment o true-up
Attachment O 2017 True-up calculation (Schedule 9)
Net Actual 2017 Rev Req (Actual Attach O, Pg 1, Line 7)
$224,812,900
Net Projected 2017 Rev Req (Projected Attach O, Pg 1, Line 7)
$223,599,780
Under/(Over) Collection of 2017 Net Rev Req
$1,213,120
Historic Year Actual Divisor for Transmission Owner (Attach O, Pg 1, Line 15)
6,859,419
Proj'd Yr Divisor for Transmission Owner (Projected Attach O, Pg 1, Line 15)
7,315,667
Difference between Historic & Projected Yr Divisor
456,248
Prior Year Projected Annual Cost ($ per kw per yr) $
Under/(Over) Collection of 2017 Divisor True-up
$13,944,992
Total Under/(Over) Recovery
$15,158,112
Monthly Interest Rate (Over collection = FERC rate, Under collection = company rate)
0.1413%
Interest For 24 Months
$514,042
Total 2017 Attachment O True-up Under/(Over) Recovery (To be included in Projected 2019)
$15,672,154

13. Aic 2019 PROJECTED attachment gg
AIC Attachment GG Calculation - Page 1

14. Aic 2019 PROJECTED 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 kV line
728
$3,296,773
2.15%
$70,873
$2,659,690 1b
Sidney-Paxton 138kV Reconductor 18 miles
870
$5,541,485
$119,129
$4,786,576 1c
Coffeen Plant-Coffeen, North - 2nd. Bus tie
2829
$5,369,816
$115,438
$4,728,628 1d
Latham - Oreana 8.5 mile 345kV line
2068
$23,538,597
$506,024
$21,361,264 1e
Brokaw-S. Bloom 345/138kV Trans & 345kV line
2069
$30,480,847
$655,265
$28,178,645 1f
Fargo-Mapleridge-20 mile 345kV line & New Sub
2472
$53,740,253
$1,155,287
$50,836,830
(7)
(8)
(9)
(10)
(11)
(12)
Annual Allocation Factor for Return
Annual Return Charge
Project Depreciation Expense
Annual Revenue Requirement
True-Up Adjustment
Network 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)
7.61%
$202,308
$51,084
$324,265
($16,912)
$307,353
$364,088
$90,673
$573,890
($3,126)
$570,764
$359,680
$101,883
$577,001
($1,665)
$575,336
$1,624,832
$415,294
$2,546,150
($1,016)
$2,545,134
$2,143,392
$569,556
$3,368,213
$9,116
$3,377,329
$3,866,873
$930,353
$5,952,513
($31,920)
$5,920,593 2
Annual Totals
$13,342,032
($45,523)
$13,296,509 3
Rev. Req. Adj For Attachment O

15. Aic 2017 attach GG true-up for Schedule 26
Attachment GG 2017 True-up ( Schedule 26)
Actual Attachment GG Rev Req for True-Up Year (Actual Attach GG, pg 2, col 10) 1
$16,515,543
Actual Attachment GG Revenues Received for 20171
$16,557,667
Under/(Over) Recovery of 2017 GG Rev Req
($42,124)
Monthly Interest Rate (Over collection = FERC rate, Under collection = company rate)
0.3363%
Interest For 24 Months
($3,400)
Total 2017 Attachment GG True-up Under/(Over) Recovery
($45,524)
1 Amount excludes True-Up Adjustment, as reported in True-Up Year projected Attachment GG, page 2, column 11.

16. Aic 2019 PROJECTED attachment MM
AIC Attachment MM Calculation - Page 1

17. Aic 2019 PROJECTED attachment MM
AIC Attachment MM Calculation - Page 2

18. Aic 2017 attach MM true-up for Schedule 26-A
Attachment MM 2017 True-up (Schedule 26-A)
Actual Attachment MM Rev Req for True-Up Year (Actual Attach GG, pg 2, col 14) 1
$13,795,822
Actual Attachment MM Revenues for 20171
$13,112,805
Under/(Over) Recovery of 2017 MM Rev Req
$683,017
Monthly Interest Rate (Over collection = FERC rate, Under collection = company rate)
0.1413%
Interest For 24 Months
$23,162
Total 2017 Attachment MM True-up Under/(Over) Recovery
$706,179
1 Amount excludes True-Up Adjustment, as reported in True-Up Year projected Attachment MM, page 2, column 15.

19. AMIL Pricing Zone Schedule 9 charge
Hoosier became a TO in the AMIL pricing zone effective 7/1/18 and uses historical rate making and therefore won’t update the revenue requirement until 6/1/19. The current revenue requirement for Hoosier is shown above for both years.
PPI’s 2019 revenue requirement is not required to be posted until 10/1/18 so the current revenue requirement for PPI is shown above for both years.

20. 2019 PROJECTED projects added to transmission plant
Total Cost
Project Name
($ Millions)
Jarvis Substation Program
56.2
Intelligrid Program
36.5
Stallings Static VAR System
28.7
Fargo Static VAR System
27.9
Muddy - West Frankfort East Line Rebuild
20.5
W. Mt. Vernon Breaker and a Half Conversion
19.0
Brokaw-Weedman-Mohomet Line Rebuild
18.9
Towerline Substation
17.6
Decatur-Bloomington Line Rebuild
17.5
Fishhook Substation
11.5
254.1

21. ER18-2322 filing to remove double averaging
Filing made August 28, 2018
Filing addressed Commission June 21, 2018 order in Docket No. EL18-155
The term double averaging or two-step averaging methodology refers to the application of the IRS proration methodology together with an additional averaging step
Requested order by October 26th in order to implement for 2019 rates

22. Transmission Pricing - Attachments O, GG & MM Information Ameren OASIS
Miso web links
Transmission Pricing - Attachments O, GG & MM Information
Ameren OASIS
MTEP 18
Schedule 26 & 26-A Indicative Charges
Additional questions on these topics can be sent to Ameren at:

23. QUESTIONS?