1. 2016 Attachment O True-Up Stakeholder Meeting
Ameren Transmission Company of Illinois
July 27, 2017

2. Purpose is to review ATXI 2016 Transmission Rate True-Up Calculations
Agenda
Purpose is to review ATXI 2016 Transmission Rate True-Up Calculations
Protocol Timeline
ROE Complaint Cases and Impact on True-up calculations
2016 True Up Calculation
Total Revenue Requirement Comparison – Projected vs Actual
Summary of Revenue Requirements at 12.38% and 10.82% ROE
Attachment O/Schedule 9 Weighted True-up
Attachment MM/Schedule 26-A Weighted True-up
2016 MVP Spend
2016 Significant Projects Placed In Service
An separate meeting will held to review the 2018 Projected Transmission Rate calculations. Tentatively set for September 21, 2017.

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 ROEs for the 2016 True-Up
ROE complaints
MISO ROEs for the 2016 True-Up
12.38% ROE for January 1 – September 27
10.82% ROE for September 28 – December 31
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 processed by Ameren
Schedule 9 Refund amounts and supporting documents are posted on Ameren’s OASIS

6. ATXI 2016 ROE Weightings
Schedule 9 has been weighted based on the actual 2016 Load in the AMIL pricing zone
Schedule 26-A has been weighted on the monthly percentage of applicable withdrawals from the prior year consistent with the monthly allocation of the total MVP revenue requirement
September load and revenue split based on number of days (i.e., 27 days at 12.38% and 3 days at 10.82%)

7. ATXI Revenue Requirement Comparison
Projected 2016 vs Actual 2016
(Complete 2016 True-up calculations with ROE at % and 10.32% are included in the posted file.)

8. Atxi 2016 Rate Base Page.Line 2016 Proj 2016 Act Change Percent 2.6
Total Gross Plant
244,237,971
262,579,385
18,341,414 8%
2.12
Total Accum Depreciation
9,096,778
8,301,568
(795,211)
-9%
2.18
TOTAL NET PLANT
235,141,193
254,277,817
19,136,625
2.18a
100% CWIP RECOVERY
684,234,021
690,164,995
5,930,974 1%
ADJUSTMENTS TO RATE BASE
2.20
Account No. 282
(39,044,786)
(89,023,692)
(49,978,906)
128%
2.21
Account No. 283
(3,708,928)
(2,415,951)
1,292,977
-35%
2.22
Account No. 190
28,380,390
31,112,986
2,732,596
10%
2.25
Land Held for Future Use -
N/A
2.26
CWC
1,575,005
1,386,593
(188,411)
-12%
2.27
Materials & Supplies
2.28
Prepayments
392,795
377,426
(15,369)
-4%
TOTAL ADJUSTMENTS
(12,405,525)
(58,562,638)
(46,157,113)
372%
2.30
TOTAL RATE BASE
906,969,689
885,880,175
(21,089,514)
-2%

9. ATXI 2016 Expenses
Page.Line
2016 Proj
2016 Act
Change
Percent
O&M
3.1
Transmission
1,200,387
2,861,811
1,661,424
138%
3.1a
Less LSE Expenses -
N/A
3.2
Less Account 565
3.3
A&G
11,399,650
8,230,935
(3,168,715)
-28%
3.4
Less FERC Annual Fees
3.5
Less EPRI, ect.
51,164
26,233
(24,931)
-49%
3.5a
Plus Trans. Reg. Comm. Exp
3.8
TOTAL O&M
12,600,037
11,092,746
(1,507,291)
-12%
3.12
TOTAL DEPRECIATION
5,736,352
5,386,753
(349,599)
-6%
TAXES
3.13
Payroll
3.16
Property
763,426
681,375
(82,051)
-11%
3.18
Other
500,000
516,357
16,357 3%
3.27
Income ROE
36,714,667
35,771,390
(943,276)
-3%
TOTAL TAXES
37,978,093
36,969,122
(1,008,970)
TOTAL EXPENSES
56,314,482
53,448,621
(2,865,860)
-5%
Income Taxes based on 12.38% ROE were $42,008,093 for projected and $40,928,818 for actuals resulting in Total Expenses of $61,607,909 for projected and $ 58,606,049 for actuals.

10. Atxi 2016 capital structure
12.38% ROE
Actual Capital Structure Projection
Hypothetical Capital Structure Projection
Page.Line $ %
Cost
Weighted
Actual Capital Structure Return
8.6638%
4.27
Long Term Debt
303,846,154
44%
3.9095%
1.7152%
Hypothetical Capital Structure Return
8.6530%
4.28
Preferred Stock 0%
0.0000%
Difference applied to Attachment MM %
4.29
Common Stock
388,732,961
56% %
6.9487%
4.3
Total
692,579,115
100%
Actual Capital Structure Actual
Hypothetical Capital Structure Actual
8.3565%
326,923,077
3.1866%
1.3946%
8.3349% %
420,079,280
6.9619%
747,002,357
Change in Actual Return %
Change in Hypothetical Return %
10.82% ROE
7.7882%
7.7794% % %
6.0731%
7.4793%
7.4613% %
6.0847% %

11. ATXI 2016 total revenue requirement
12.38% ROE
Page.Line
Projected
Actual
Change
Percent
2.30
TOTAL RATE BASE
906,969,689
885,880,175
(21,089,514)
-2%
4.30
Rate of Return on ACS
8.66%
8.36%
-0.31%
-4%
3.28
Return from ACS
78,578,452
74,028,860
(4,549,592)
-6%
2.30a
100% CWIP RECOVERY
684,234,021
690,164,995
5,930,974 1%
4.30e
Incremental Rate of Return on HCS
-0.01%
-0.02%
99%
3.28a
Incremental Return from HCS
(74,367)
(149,320)
(74,953)
101%
Total Return
78,504,085
73,879,540
(4,624,545)
Total Expenses
61,607,909
58,606,049
(3,001,860)
-5%
3.29
TOTAL GROSS REV. REQ.
140,111,994
132,485,590
(7,626,404)
3.30
Less ATT. GG Adjustment -
N/A
3.30a
Less ATT. MM Adjustment
130,383,256
122,311,970
(8,071,286)
3.31
GROSS REV. REQ. UNDER ATT. O
9,728,737
10,173,620
444,882 5%
10.82% ROE
7.79%
7.48%
70,637,010
66,257,288
(4,379,722)
103%
(60,671)
(123,982)
(63,311)
104%
70,576,339
66,133,306
(4,443,033)
56,314,482
53,448,621
(2,865,860)
126,890,821
119,581,927
(7,308,894)
117,855,536
110,071,470
(7,784,066)
-7%
9,035,285
9,510,458
475,172

12. Atxi 2016 Net Revenue Requirement For Schedule 9
12.38% ROE
Page.Line
Projected
Actual
Change
Percent
1.1
Gross Revenue Requirement
9,728,737
10,173,620
444,882 5%
1.6
Total Revenue Credits
990,564
908,498
(82,066)
-8%
1.6a
Historic Year Actual ATRR
10,018,898 - 0%
1.6b
Projected ATRR from Prior Year
9,793,999
1.6c
Prior Year ATRR True-Up
224,899
1.6d
Prior Year Divisor True-Up
(222,920)
1.6e
Interest on Prior Year True-Up
31,082
1.7
NET REVENUE REQUIREMENT
8,771,234
9,298,182
526,948 6%
10.82% ROE
9,035,285
9,510,458
475,172
8,077,782
8,635,020
557,239 7%
Prior year true-ups shown above represent the 2014 revised true-up at 10.32% ROE as a result of the Order in Docket EL The 2014 true –up at 12.38% ROE was originally included in 2016 rates.

13. Attachment O & MM Revenue Requirement Summary
12.38% ROE
Projected
Actual
Change
Percent
Total Revenue Requirement
140,111,994
132,485,590
-7,626,404
-5.4%
Less Attachment MM Rev Req
130,383,256
122,311,970
-8,071,286
-6.2%
Gross Attachment O Rev Req
9,728,737
10,173,620
444,882
4.6%
Less Revenue Credits
990,564
908,498
-82,066
-8.3%
Plus Total Prior Year True-up
33,061
0.0%
Net Attachment O Rev Req
8,771,234
9,298,182
526,948
6.0%
10.82% ROE
126,890,821
119,581,927
-7,308,894
-5.8%
117,855,536
110,071,470
-7,784,066
-6.6%
9,035,285
9,510,458
475,172
5.3%
8,077,782
8,635,020
557,239
6.9%
Shaded cells used in True-up calculations
Prior year true-ups shown above represent the 2014 revised true-up at 10.32% ROE as a result of the Order in Docket EL The 2014 true –up at 12.38% ROE was originally included in 2016 rates.

14. ATXI 2016 attachment o true up for Schedule 9
Attachment O 2016 True-up calculation (Schedule 9)
2016 Rev Req at
2016 Weighted
Calculation of 2016 Weighted Attachment O Rev Req
12.38%
10.82%
Rev Req
Net Actual 2016 Rev Req (Actual Attach O, Pg 1, Line 7)
$9,298,182
$8,635,020
Percent of Actual Revenue Requirement at ROE
76.48%
23.52%
Weighted Net Actual 2016 Rev Requirement
$7,111,250
$2,030,957
$9,142,207
Net Projected 2016 Rev Req (Projected Attach O, Pg 1, Line 7)1
$8,771,234
$8,077,782
Percent of Projected Revenue at ROE
Weighted Net Projected 2016 Rev Requirement
$6,708,240
$1,899,894
$8,608,134
Under/(Over) Collection of 2016 Weighted Net Rev Req
403,010
131,063
534,073
Historic Year Actual Divisor for Transmission Owner (AIC Attach O, Pg 1, Line 15)
6,995,394
Proj'd Yr Divisor for Transmission Owner (AIC Projected Attach O, Pg 1, Line 15)
7,118,197
Difference between Historic & Projected Yr Divisor
122,804
Prior Year Projected Annual Cost ($ per kw per yr)
$1.2322
$1.1348
Percent of Revenue Received at ROE
Weighted Prior Yr projected Annual Cost ($ per kw per year)
$0.9424
$0.2669
$1.2093
Under/(Over) Collection of 2016 Divisor True-up
$148,507
Total Under/(Over) Recovery
682,580
Monthly Interest Rate (Over collection = FERC rate, Under collection = company rate)
0.0561%
Interest For 24 Months
$9,190
Total 2016 Attachment O True-up Under/(Over) Recovery (To be included in Projected 2018)
$ ,770

15. ATXI 2016 attachment MM true-up for Schedule 26-A

16. ATXI 2016 attachment MM true-up for Schedule 26-A
ATXI 2016 Weighted Attachment MM True Up by Project
2016 Attachment MM True-Up Adjustment - Weighted
To be completed after the Attachment MM using actual data is completed for the True-Up Year
Company Name:
ATXI
True-Up Year:
2016
(a)
(b)
(c)
(d)
(e)
(f)
(g)
(h)
(i)
(j)
(k)
Actual
Projected
Attachment MM
True-Up
Applicable
MTEP
Annual
Revenues
Adjustment
Interest
Total
Line
Project
Revenue
Allocated
Principal
Rate on
No.
Name
Number
Requirement 1
to Projects 1
Under/(Over)
[Col. (d), line 1
x (Col. (e), line 2x /
Col. (h) x Col. (i)
p 2 of 2, Col. 142
Col. (e), line 3)]2
Col. (g) - Col. (f)
Line 5
x 24 months 2
Col. (h) + Col. (j) 1
Actual Attachment MM revenues for True-Up Year 1
$ ,545,497 1a
Pana-Sugar Creek - CWIP
2237
$ ,739,217
$ ,421,338
$ ,031,901
$ (2,389,437)
0.056%
$ (32,171)
$ (2,421,608) 1b
Pana-Sugar Creek - Plant in Service - No HCS
$ ,598,547
$ ,134,489
$ ,284,965
$ ,150,476
$ ,954
$ ,179,430 1c
Pana-Sugar Creek - Land - No HCS
$ ,187
$ ,672
$ ,097
$ (16,575)
$ (223)
$ (16,798) 1d
Sidney-Rising - CWIP
2239
$ ,357,601
$ ,840,161
$ ,320,101
$ (1,520,060)
$ (20,466)
$ (1,540,526) 1e
Sidney-Rising - Plant in Service - No HCS
$ ,765,799
$ ,500,960
$ ,063,211
$ ,562,251
$ ,034
$ ,583,285 1f
Sidney-Rising - Land - No HCS
$ ,954
$ ,017
$ ,243
$ (3,774)
$ (51)
$ (3,825) 1g
Adair-Ottumwa - CWIP
2248
$ ,000
$ ,311
$ ,322
$ (149,989)
$ (2,019)
$ (152,008) 1h
Adair-Ottumwa - Plant in Service - No HCS $ $ $ $ 1i
Adair-Ottumwa - Land - No HCS
$ ,865
$ ,264
$ ,344
$ (1,920)
$ (26)
$ (1,946) 1j
Palmyra-Pawnee - CWIP
3017
$ ,940,322
$ ,217,171
$ ,842,364
$ ,625,193
$ ,274
$ ,687,467 1k
Palmyra-Pawnee - Plant in Service - No HCS
$ ,363,412
$ ,353,272
$ ,881,934
$ (3,471,338)
$ (46,738)
$ (3,518,076) 1l
Palmyra-Pawnee - Land - No HCS
$ ,168,662
$ ,086,473
$ ,144,888
$ ,415 $
$ ,201 1m
Fargo-Galesburg-Oak Grove - CWIP
3022
$ ,097,868
$ ,669,021
$ ,937,941
$ (731,080)
$ (9,843)
$ (740,923) 1n
Fargo-Galesburg-Oak Grove - Plant in Service - No HCS
$ ,203
$ ,832
$ ,117,750
$ ,918
$ ,482
$ ,400 1o
Fargo-Galesburg-Oak Grove - Land - No HCS
$ ,892
$ ,721
$ ,852
$ (10,869)
$ (146)
$ (11,015) 1p
Pawnee-Pana - CWIP
3169
$ ,536,882
$ ,006,833
$ ,614,602
$ (392,231)
$ (5,281)
$ (397,512) 1q
Pawnee-Pana - Plant in Service - No HCS
$ ,482
$ ,269
$ ,418,901
$ ,632
$ ,015
$ ,647 1r
Pawnee-Pana - Land - No HCS
$ ,817
$ ,658
$ ,130
$ (87,528)
$ (1,178)
$ (88,706) 1s
Adair-Palmyra - CWIP
3170
$ ,531,940
$ ,213,221
$ ,463,383
$ (749,838)
$ (10,096)
$ (759,934) 1t
Adair-Palmyra - Plant in Service - No HCS
$ ,433
$ ,483
$ ,162,663
$ ,180
$ ,679
$ ,859 1u
Adair-Palmyra - Land - No HCS
$ ,073
$ ,332
$ ,080
$ (2,252)
$ (30)
$ (2,282) 3
Subtotal
$ ,513,156
$ ,545,498
$ ,507,672 4
Under/(Over) Recovery
$ ,174
$ ,956
$ ,130 5
Applicable Interest rate per month (expressed to four decimal places)
Interest Rate to be updated through July 2017
0.0561%
Amount excludes True-Up Adjustment, as reported in True-Up Year projected Attachment MM, page 2, column 15. 2
Rounded to whole dollars.

17. Atxi 2016 MVP SPEND Ameren MVPs Ameren Name 2016 CAPEX MTEP #s
MTEP Description
Illinois Rivers
$354 million
2237
Pana - Mt. Zion - Kansas - Sugar Creek 345 kV line
2239
Sidney to Rising 345 kV line
3017
Palmyra-Quincy-Meredosia - Ipava & Meredosia-Pawnee 345 kV Line
3169
Pawnee to Pana kV Line
3170
New Palmyra Substation (Maywood)
Spoon River
$36 million
3022
Fargo-Galesburg-Oak Grove 345 kV Line
Mark Twain
$9 million
2248
Adair - Ottumwa 345
Adair-Palmyra 345 kV Line

18. MVP Facilities in service
Illinois Rivers
All 10 Substations
4 of 9 Line Segments
Austin
Faraday-Pana (32.4 mi)
Faraday
Sidney-Rising (24.2 mi)
Herleman
Maywood-Herleman (14.7 mi)
Ipava
Herleman-Meredosia (46.6 mi)
Kansas
Maywood
2 of 3 River Crossings
Meredosia
Herleman-Maywood
Pana
Meredosia-Herleman
Rising
Sidney
Spoon River
Fargo Substation
Sandburg Substation

19. Additional information
Additional questions can be sent to Ameren at:
MISO Web Links
Transmission Pricing - Attachments O, GG & MM Information
Ameren OASIS
MTEP 16
MTEP 17
Schedule 26 & 26-A Indicative Charges