Muscatine Power & Water Attachment O Annual Meeting

1. Muscatine Power & Water Attachment O Annual Meeting Transmission Formula Rate UpdateAugust 27th, 2019

2. Background Muscatine Power & Water • Muscatine Power & Water (MP&W) became a Transmission Owning member of MISO in September 2009 • As a Transmission Owner (TO), MP&W must annually establish rates for open access use of its transmission assets • MP&W utilizes MISO’s standard (pro forma) Attachment O formula rate template to determine these rates • MP&W utilizes the Non-levelized Attachment O template based on data from EIA 412 • EIA (Energy Information Administration) form 412 is a standard annual financial reporting form prepared by electric utilities and filed with EIA • MP&W is no longer required to file an EIA-412, but it is prepared to support Attachment O preparation

3. Purpose of Annual Meeting Muscatine Power & Water • Allow for public/stakeholder comment related to MP&W’s 2019 Attachment O submittal • Based on 2018 Calendar Year audited financial statements

4. Attachment O Timeline MISO Attachment O Rate Data Webpage: https://www.misoenergy.org/markets-and-operations/ts-pricing/to-rate-data/

5. 2019 Attachment O Summary [1] Return is calculated based on a percentage Return on Equity as approved for MISO Transmission Owners by FERC Note: Preparation of the 2019 Attachment O followed the procedures that were reviewed and refined by an external consultant during the 2013 Attachment O preparation Muscatine Power & Water

6. Historical Comparison Muscatine Power & Water

7. Contact Information Muscatine Power & Water • Ryan Streck • Director of Utility Service Delivery • Office: 563-262-3321 • Email: rstreck@mpw.org • MPW OATI OASIS Webpage • http://www.oasis.oati.com/MPWM/