1. 2016 Projected Attachment O-PPI Open Stakeholder Meeting
October 15, 2015

2. Agenda Summarize PPI-specific protocols under ER15-2364
Review 2016 Projections
Explain Ameren IL Company Joint Zone Rate structure 2

3. Forward-looking Filing
July 31, 2015 – FERC filing to revise MISO Tariff sheets for Attachments O, GG and MM ER
Establishes company-specific Attachment O-PPI which calculates a forward-looking revenue requirement in the Ameren IL Zone
Institutes the transparency and true-up mechanism Protocols for Attachments O and GG
Includes PPI in Attachment MM provisions
Effective Date: October 1st for Protocols and January 1st for revenue requirement
October 7, 2015 – FERC Order of Approval 3

4. PPI-specific Protocols
Date/Deadline
Activity
October 1st
Deadline to submit upcoming year’s Annual ATRR Projection
October 31st
Deadline to hold Annual Projected Rate Meeting to discuss projected ATRR
November 1st
Deadline for informational meeting for MISO Owners with Project costs being shared regionally*
December 1st
Deadline for Interested Parties to submit information requests
January 10th
Deadline for PPI to respond to information requests
January 31st
Deadline for Interested Parties to submit Informal Challenges
February 28th
Deadline for PPI to respond to Informal Challenges
March 15th
Deadline for PPI submit Informational Filing to FERC
April 15th
Deadline for Interested Parties to file Formal Challenge at FERC
June 1st
Deadline to publish Annual Update with True-Up
September 1st
Deadline for Annual Update open meeting
* PPI has not constructed a Project which is regionally cost-shared. 4

5. MISO Protocols
Operations/TransmissionSettlements/ Pages/TransmissionOwnerRateData.as px
PPI Contact for informational requests or Informal Challenges:
Alisha Anker
(217) 5

6. Attachment O-PPI Rate-making formula for Plant in Service:
FERC-approved Rate Formulae specific to PPI
PPI uses the Non-Levelized template utilizing RUS/CFC Form 12 data
Timing of rate impact now consistent across the Ameren IL Zone
Rate-making formula for Plant in Service:
Net Revenue Requirement =
O&M +
Depreciation +
Taxes +
Return on Rate Base -
Revenue Credits
Return on Rate Base =
( Net Plant in Service +
Total Working Capital
Land Held for Future Use ) x
Weighted Rate of Return 6

7. Attachment O-PPI Calc – Summary
Allocators:
TP = Percentage of Transmission Plant in ISO Rates
TE = Percentage of Transmission Expenses in ISO Rates (same as TP Allocator for PPI)
W/S = Percentage of Transmission-related Wages/Salaries to Total Wages/Salaries
GP = Percentage of Transmission-related Gross Plant 7

8. Attachment O-PPI Calc – Rate Base8

9. Transmission Additions
Upgrade Alsey Sub to accommodate 6-breaker ring bus
138kV Alsey–Pittsfield
138/69kV step-down at Pittsfield
Upgrade Winchester-Pittsfield 69kV
Source: MTEP14 Central SPM Presentation
June 17, 2014 9

10. Attachment O-PPI Calc – Expenses10

11. Attachment O-PPI Calc – Capital Structure11

12. Joint Zone Rates
Net Revenue Requirements for each Zonal Party are aggregated
Σ Rev Reqt’s = Σ (PPI + AIC + ATXI)
Σ Rev Reqt’s / Avg 12-mo Demand = $/kW-mo NITS rate
Revenue allocated pursuant to JPZ Agreement* between the Parties
Revenues allocated based on share of:
Annual Rev Reqt for Sch 9 service (PPI share = 3.3%)
Adjusted Gross Book Value for PTP service (Sch 7 & 8) within and into/out of Zone (PPI share = 2.37%)
PPI Rev Requirement has no impact on Sch 26 or Sch 26A
*Joint Pricing Zone Revenue Allocation Agreement
Docket No. ER
Effective Date: June 1, 2013 12

13. Joint Zone Shares 13

14. Questions? … Contact: Alisha Anker aanker@ppi.coop (217) 331-562114