Otter Tail Power Company Before the Minnesota Public Utilities Commission

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Otter Tail Power Company Before the Application for Authority to Increase Electric Rates Docket No. E017/GR-15-1033 February 16, 2016 Volume 1 Notice of Change in Rates Rate Petition

Volume 1 Index 1/3 tab

Otter Tail Power Company Minnesota General Rate Case Documents Docket No. E017/GR-15-1033 Volume 1 Notice of Change in Rates Rate Petition Index Filing Letter Notice of Change in Rates Notice and Petition for Rates Agreement and Undertaking, and Certification Supporting Schedules and Workpapers Summary of Present and Revenue Tariff Sheets Redlined Tariff Sheets Non-Redlined Proposed Notices 2A 2B Direct Testimony and Supporting Schedules Index Policy Peter J. Beithon Revenue Deficiency Proposed Test Year 2016 Cost of Service Study Class Revenue Responsibility Stuart D. Tommerdahl Rider Roll-in Allocation Factors Compliance Items Tyler A. Akerman Budgeting Process Rate Base Operating Statement Direct Testimony and Supporting Schedules Index Kevin G. Moug Financial Soundness Capital Structure Cost of Capital Robert B. Hevert Return on Equity Brian H. Draxten Sales Forecast Peter E. Wasberg Employee Compensation Mark A. Rolfes Environmental Projects

Volume 2C Otter Tail Power Company Minnesota General Rate Case Documents Docket No. E017/GR-15-1033 Amparo Nieto Fixed Charges and Rate Design Policy David G. Prazak Rate Design 2D Proposed Redlined and Non-Redlined Tariff Sheets Index Proposed Tariff Sheets Redlined Proposed Tariff Sheets Non-Redlined 3 Required Information Index Required Information A. Jurisdictional Financial Summary Schedules (Rule 7825.3900) Definitions Summary of Revenue Requirements Proposed Test Year 2016 Jurisdictional Financial Summary Schedule B. Rate Base Schedules (Rule 7825.4000) Definitions 1. Rate Base Summary 2. Detailed Rate Base Components a. Materials and Supplies b. Fuel Stocks c. Prepayments d. Customer Advances and Deposits e. Cash Working Capital 3. Rate Base Adjustments 4. Summary of Approaches and Assumptions Used 5. Rate Base Jurisdictional Allocation Factors C. Operating Income Schedules (Rule 7825.4100) Definitions 1. Jurisdictional Statement of Operating Income 2. Statement of Operating Income - Jurisdictional 3. Statement of Operating Income Proposed Test Year 2016 4. Computation of Federal and State Income Taxes 5. Computation of Deferred Income Taxes 6. Development of Federal and State Income Tax Rates 7. Operating Income Statement Adjustments Schedule 8. Summary of Approaches and Assumptions Used 9. Operating Income Statement Allocation Factors D. Rate of Return Cost of Capital Schedules (Rule 7825.4200) 1. Summary Schedule 2. Composite Cost of Long-Term Debt 3. Average Short-Term Debt 4. Average Common-Equity

Otter Tail Power Company Minnesota General Rate Case Documents Docket No. E017/GR-15-1033 Volume 3 E. Rate Structure and Design Information (Rule 7825.4300) 1. Proposed Test Year 2016 Operating Revenue Summary Comparison 2. Proposed Test Year 2016 Operating Revenue Detailed Comparison 3. Class Cost of Service Study F. Other Supplemental Information 1. Annual Report and Statistical Supplement 2. Gross Revenue Conversion Factor G. Commission Policy Information 1. Advertising 2. Charitable Contributions 3. Organization Dues 4. Research Expense H. Travel, Entertainment, and Related Employee Expenses (Statute 216B.16, Subp. 17) 4A Work Papers Index A. Proposed Test Year 2016 Workpapers 1. Jurisdictional Cost of Service Study (JCOSS) 2. Class Cost of Service Study (CCOSS) 3. Functionalization 4. Input Summary 5. Proposed Test Year 2016 Adjustments TY-01 - Normalized Plant in Service TY-02 - BSP II Deferred Recovery TY-03 - Rate Case Expenses TY-04 KPA TY-05 - TCR MISO Removal TY-06 Prepaid Pension B. Unadjusted Projected Fiscal Year 2016 Workpapers 1. Jurisdictional Cost of Service Study (JCOSS) 2. Functionalization 3. Input Summary 4. Work Papers A-D, MN C. Cost of Service Study D. Hevert Cost of Capital Workpapers 4B Lead Lag Study Index Lead Lag Study 5 Budget Documentation Index O&M Budget Process Capital Budget Process

Volume 1 Filing Letter 1/3 tab

215 South Cascade Street PO Box 496 Fergus Falls, Minnesota 56538-0496 218 739-8200 www.otpco.com (web site) February 16, 2016 Daniel P. Wolf Executive Secretary 121 Seventh Place East, Suite 350 St. Paul, MN 55101-2147 Re: In the Matter of the Application of Otter Tail Power Company for Authority to Increase Rates for Electric Service Docket No. E017/GR-15-1033 Dear Mr. Wolf: Enclosed is an Application for Proposed Increase in Electric Rates (Application) for Otter Tail Power Company (OTP or the Company). This Application is being filed with the Minnesota Public Utilities Commission (Commission) pursuant to Minn. Stat. 216B.16, Subd. 1. The Application includes a Notice of Change in Rates and a Notice and Petition for Rates, made pursuant to Minn. Stat. 216B.16, Subd. 3. By filing this Application, OTP seeks authority to increase revenues by $19,295,627 or 9.80 percent to recover the current cost of providing electric service to our customers, including an appropriate return on common equity. Pursuant to Minn. Stat. 216B.16, Subd. 1, which authorizes changes in rates upon 60 days notice to the Commission, the proposed rates would become effective on April 16, 2016 if not suspended by the Commission. If the Commission suspends the proposed rate increase pursuant to Minn. Stat. 216B.16, Subd. 2, OTP requests authority to implement the proposed rates within 10 months of the date of the Notice, pursuant to Minn. Stat. 216B.16, Subd. 2(a). OTP acknowledges that due to the number of rate cases currently pending, the Commission may extend the review period pursuant to Minn. Stat. 216B.16, Subd. 2(f ). If the Commission suspends the proposed rate increase and extends the review period, OTP requests authority to implement final rates no later than 90 days after the end of the 10 month period. As described in the Notice and Petition for Rates, if the Commission suspends the proposed rate increase as described above, OTP requests authority to implement an interim rate increase of $19,251,135 on April 16, 2016, pursuant to Minn. Stat. 216B.16, Subd. 3. The interim rate will be applied as a uniform 10.95 percent increase to base rate components of customers bills. An Equal Opportunity Employer

Daniel P. Wolf February 16, 2016 Page 2 OTP s Application for Proposed Increase in Electric Rates is presented in five volumes as described below: Application/ Rates Volume 1 Volumes 2A, 2B, 2C, 2D Volume 3 Volumes 4A, 4B Volume 5 Notice of Change in Rates Rate Petition Testimony and Schedules Proposed Rates and Tariffs Required Information Test Year Workpapers Lead Lag Study Budget Documentation In addition, Volume 1 includes a proposed Notice of Filing to be provided to each municipality and county in OTP s electric service territory. A list of the counties and communities served by OTP is attached to that Notice. The Notice and Petition for Rates, also included in Volume 1, describes the interim rate schedules for each customer class and contains proposed customer notices. Once approved, these notices will be provided to the municipalities, counties, and customers. Pursuant to Minn. R. 7825.2400-2600, OTP is also submitting a separate miscellaneous rate change filing seeking to restate the Base Energy Adjustment Charge for interim rates (Docket No. E017/MR-15-1034). A copy of the Application has been served on the Department of Commerce Division of Energy Resources and the Office of the Attorney General Antitrust & Utilities Division, and the Summary of Filing has been served on all intervenors from the Company s most recent electric rate case (Docket No. E017/GR-10-239), as well as on persons on the Company s general electric service list, as shown on the Certificate of Service included with the Notice of Change in Rates. OTP will cooperate fully with the Commission and the state agencies as they review the Application. Sincerely, /s/ THOMAS R. BRAUSE Vice President Administration Otter Tail Power Company wao Enclosures By electronic filing c: Service List

Volume 1 Notice of Change in Rates 1/3 tab

STATE OF MINNESOTA BEFORE THE Beverly Jones Heydinger Nancy Lange Dan Lipschultz Matt Schuerger John Tuma Chair Commissioner Commissioner Commissioner Commissioner In the Matter of the Application of Otter Tail Power Company For Authority to Increase Rates for Electric Utility Service Docket No. E017/GR-15-1033 NOTICE OF CHANGE IN RATES I. INTRODUCTION Otter Tail Power Company (OTP or the Company) hereby provides notice of and applies for authority from the (Commission) to increase retail electric rates pursuant to Minn. Stat. 216B.16 and Minn. R. 7825.3100-7825.4600 and 7829.2400 (Notice). This Notice is for a proposed increase in revenues of $19,295,627 or 9.80 percent. Pursuant to Minn. Stat. 216B.16, Subd. 1, which authorizes changes in rates upon 60 days notice to the Commission, the proposed rates would become effective on April 16, 2016 if not suspended by the Commission. If the Commission suspends the proposed rate increase pursuant to Minn. Stat. 216B.16, Subd. 2, OTP requests authority to implement the proposed rates within 10 months of the date of the Notice, pursuant to Minn. Stat. 216B.16, Subd. 2(a). OTP acknowledges that due to the number of rate cases currently pending, the Commission may extend the review period pursuant to Minn. Stat. 216B.16, Subd. 2(f ). If the Commission suspends the proposed rate increase and extends the review period, OTP requests authority to implement final rates no later than 90 days after the end of the 10 month period. The average monthly impact of the proposed rate increase for residential customers will be $9.53 per month or $114.36 per year. The impact on individual customers will be higher or lower depending on each individual customer s actual electric consumption. If the Commission suspends the proposed rate increase as described above, OTP requests authority to implement an interim rate increase of $19,251,135 on April 16, 2016, pursuant to Minn. Stat. 216B.16, Subd. 3. The interim rate will be applied as a uniform 10.95 percent increase to base rate components of customers bills. OTP proposes to maintain its Transmission Cost Recovery Rider and Environmental Cost Recovery Rider in place through the course of the proceeding. At the time final rates are implemented, OTP proposes to move project costs recovered through those riders into base rates. OTP is also proposing changes to its rate design and terms of service.

This Notice includes the following information in accordance with Minnesota Statutes and Commission rules: II. NOTICE AND PROPOSAL REGARDING GENERAL RATE CHANGE (Minn. R. 7825.3200A(1) and 7825.3500) A. Name, address and telephone number of utility and attorneys for the utility Otter Tail Power Company 215 South Cascade Street Fergus Falls, MN 56537 218-739-8200 Bruce Gerhardson Associate General Counsel Otter Tail Power Company P.O. Box 496 215 South Cascade Street Fergus Falls, MN 56538-0496 218-739-8475 Cary Stephenson Associate General Counsel Otter Tail Power Company PO Box 496 215 South Cascade Street Fergus Falls, MN 56538-0496 218-739-8956 Richard J. Johnson Moss & Barnett, A Professional Association Suite 1200 150 South Fifth Street Minneapolis, MN 55402 612-877-5275 B. Date of filing and date modified rates are to be effective The date of this filing is February 16, 2016. Pursuant to Minn. Stat. 216B.16, Subd. 1, without a suspension, the proposed rate changes would become effective April 16, 2016, sixty days after filing. A schedule of rates and tariffs, reflecting the overall revenue increase requested and the proposed rate design described in the attached documents is included with the Application. As described in the Notice and Petition for Rates, if the Commission suspends the proposed rate increase as described above, OTP requests authority to implement an interim rate increase of $19,251,135 on April 16, 2016, pursuant to Minn. Stat. 216B.16, Subd. 3. The interim rate will be applied as a 10.95 percent uniform increase to base rate components of customers bills. 2

C. Description and purpose of the change in rates requested This Application for a change in rates applies to all of the Company s retail electric customers in the State of Minnesota, and the proposed rates are designed to produce additional revenues sufficient to meet the Company s cost of service for the Test Year ending December 31, 2016. This filing complies with the provisions of Minn. Stat. 216B.16 and the Commission s rules governing rate changes. D. Effect of the change in rates The overall proposed increase in revenues is $19,295,627 or 9.80 percent. The average monthly impact of the proposed rate increase for residential customers will be $9.53 per month or $114.36 per year. The impact on an individual customer may be higher or lower depending on the individual customer s actual electric consumption. E. Signature and title of utility officer authorizing the proposal This Application is signed on behalf of OTP by, Vice President Administration of Otter Tail Power Company. III. MODIFIED RATES (Minn. R. 7825.3200(A)(2) and 7825.3600) Attached to this Application are rate schedules containing the proposed modifications to rates and other changes to OTP s rate book. These schedules and tariffs are included in Volume 2D of the Application and are supported by the pre-filed Direct Testimony of Mr. David G. Prazak. IV. EXPERT OPINIONS AND SUPPORTING DOCUMENTS (Minn. R. 7825.3200(A)(3) and 7825.3700) Attached to this Application are statements of fact, expert opinions, substantiating documents and exhibits supporting the change in retail electric rates. Pursuant to Minn. R. 7825.3700, provides Direct Testimony as the Company s designated official in support of the Application. A list of the Company s other witnesses is provided in Mr. Brause s Direct Testimony. V. INFORMATION REQUIREMENTS (Minn. R. 7825.3200(A)(4) and 7825.3800-7825.4400) Included in this Application in Volumes 2A, 2B and 2C are the Direct Testimonies of the Company s witnesses, Volume 2D contains our proposed tariffs, which along with Volume 3, Required Information, Volumes 4A and 4B, Test Year Workpapers, and Volume 5 Budget Documentation represent the Company s supporting documentation and contains the information in support of a general rate increase required by Minn. R. 7825.3800 through Minn. R. 7825.4400. 3

The data for the most recent fiscal year is 2015. The projected fiscal year is calendar year 2016. The proposed Test Year is the projected fiscal year ending December 31, 2016, with test year adjustments. Data from 2014 is also provided for informational purposes. VI. METHODS AND PROCEDURES FOR REFUNDING (Minn. R. 7825.3200(A)(5) and 7825.3300) Included with this Application is an Agreement and Undertaking signed and verified by Thomas R. Brause, of Otter Tail Power Company. VII. NOTICE TO MUNICIPALITIES AND COUNTIES. (Minn. Stat. 216B.16, Subd. 1) Pursuant to Minn. Stat. 216B.16, Subd. 1, OTP proposes to mail the Notice to Counties and Municipalities to all municipalities and counties in OTP s Minnesota electric service territory. This notice includes a discussion of the proposed interim rates, as well as information regarding the general electric rate case filing. The Company requests Commission approval of the notice so it may be mailed in a timely fashion. VIII. CUSTOMER NOTICE (Minn. R. 7829.2400, Subpt. 3) OTP will use a bill insert to notify customers of its Application to increase retail electric rates and explain the proposed rate increase. If OTP s requested retail electric rate increase is suspended, the Company will also explain the impact of OTP s interim rates on customer bills in the same bill insert. Included in this Application is the Company s proposed notice of its rate increase. The Company requests approval of the customer notice so it can be included with the first bills issued with interim rates. The Company will also be posting this Application, Testimony and Supporting Documentation on our website (www.otpco.com/mnratecase). IX. FILINGS REQUIRING DETERMINATION OF GROSS REVENUE REQUIREMENT (Minn. R. 7829.2400) Pursuant to Minn. R. 7829.2400, OTP is submitting the following information in addition to that required by Minn. R. 7825.3100-7825.4600. A. Summary A summary of the Application is attached to this notice. B. Service; proof of service OTP has served copies of the Application on the Department of Commerce Division of Energy Resources and the Office of the Attorney General Antitrust and Utilities Division. OTP will serve a copy of the Summary of Filing on all the parties on the general service list for OTP and 4

on the parties in the Company s last electric rate case proceedings (Docket No. E017/GR-10-239). A certificate of service is attached. C. Notice to public and governing bodies See Sections VII. and VIII., above. In addition, OTP will, as directed by the Commission, publish a notice of the proposed change in newspapers of general circulation in all county seats in OTP s Minnesota electric service territory. D. Notice of hearing OTP will notify ratepayers of hearings held in connection with this Application as directed by the Commission. OTP will also publish notice of the hearings in newspapers of general circulation in all county seats in OTP s Minnesota electric service area, as directed by the Commission. X. REQUEST FOR PROTECTION OF NONPUBLIC INFORMATION OTP balanced the need for transparency in the Application with the need to provide non-public information in supporting data. A limited number of schedules include Protected Data designated as Trade Secret or Not Public information according to Minn. Stat. 13.37, Subd. 1(b). and Minn. Rule 7829.0500. The Company has taken reasonable efforts to maintain the secrecy of this Protected Data, which derives independent economic value, actual or potential, from not being generally known to, and not being readily ascertainable by proper means by, other persons who can obtain economic value from its disclosure or use. The Direct Testimony of Mr. Peter E. Wasberg includes the following schedules that OTP requests be treated as protected data: - Schedule 2 2015 Mercer Compensation Benchmark Study NOT PUBLIC - Schedule 3 2015 Mercer Executive Compensation Review NOT PUBLIC - Schedule 6 Report of the 2015 Towers Watson Energy Services BenVal Study NOT PUBLIC - Schedule 7b 5-year payouts of the OTP Mgmt Incentive Plan NOT PUBLIC - Schedule 10a 2015 Pension Accounting Expense Report Mercer NOT PUBLIC - Schedule 10b 2015 Pension DAMP Mercer NOT PUBLIC - Schedule 10c 2015 Post-retirement Medical and LTD Medical DAMP Mercer NOT PUBLIC Additionally, OTP requests the compensation information provided for the sixth through tenth highest paid employees be treated as Non-Public data pursuant to Minn. Stat. 216B.16 Subd. 17(5). This information should be protected to preserve the privacy of these individuals. This information also derives independent economic value from not being known to competitors who may seek to hire these employees. OTP is filing complete Public and Non-Public versions of the portions of this Application that contain Trade Secret or Non-Public information. 5

XI. SERVICE LIST Pursuant to Minn. R. 7829.0700, the Company requests the following persons representing OTP be placed on the Commission s official service list for this proceeding: Matthew Olsen Manager Regulatory Proceedings and Compliance Otter Tail Power Company P.O. Box 496 215 South Cascade Street Fergus Falls, MN 56538-0496 molsen@otpco.com Bruce Gerhardson Associate General Counsel Otter Tail Power Company P.O. Box 496 215 South Cascade Street Fergus Falls, MN 56538-0496 bgerhardson@otpco.com Cary Stephenson Associate General Counsel Otter Tail Power Company P.O. Box 496 215 South Cascade Street Fergus Falls, MN 56538-0496 cstephenson@otpco.com Richard J. Johnson Moss & Barnett, A professional Association Suite 1200 150 South Fifth Street Minneapolis, MN 55402 rick.johnson@lawmoss.com Patrick T. Zomer Moss & Barnett, A professional Association Suite 1200 150 South Fifth Street Minneapolis, MN 55402 pat.zomer@lawmoss.com 6

XII. CONCLUSION The Company respectfully requests consideration and acceptance of its Application. Dated: February 16, 2016 Respectfully submitted, /s/ THOMAS R. BRAUSE Otter Tail Power Company Subscribed and sworn to before me this 16th day of February, 2016 /s/ WENDI A. OLSON Notary Public My Commission expires January 31, 2020. 7

STATE OF MINNESOTA BEFORE THE Beverly Jones Heydinger Nancy Lange Dan Lipschultz Matt Schuerger John Tuma Chair Commissioner Commissioner Commissioner Commissioner In the Matter of the Application of Otter Tail Power Company For Authority to Increase Rates for Electric Utility Service Docket No. E017/GR-15-1033 SUMMARY OF FILING On February 16, 2016, Otter Tail Power Company (OTP) filed with the Minnesota Public Utilities Commission (Commission) an application to increase base retail electric rates in the State of Minnesota (Application). OTP requests an increase in revenues of $19,295,627 or 9.80 percent. OTP proposes to keep its Transmission Cost Recovery Rider and Environmental Cost Recovery Rider in place through the course of the proceeding. At the time final rates are implemented, OTP proposes to move project costs recovered through those riders into base rates. The average monthly impact of the proposed rate increase for residential customers will be $9.53 per month or $114.36 per year. The impact on individual customers will be higher or lower depending on each individual customer s actual electric consumption. If the Commission elects to suspend the proposed rate increase under Minn. Stat. 216B.16, Subd. 2, OTP requests authority to implement an interim rate increase of $19,251,135 on April 16, 2016, pursuant to Minn. Stat. 216B.16, Subd. 3. The interim rate will be applied as a uniform 10.95 percent increase to base rate components of customers bills. OTP is also proposing changes to rate designs and terms of service. The proposed rate schedules and a comparison of present and proposed rates are available at www.otpco.com/mnratecase and can also be examined during normal business hours at either OTP s General Offices located at 215 South Cascade Street, Fergus Falls, Minnesota 56537, or at the Minnesota Department of Commerce, 85 Seventh Place East, Suite 500, St. Paul, Minnesota 55101.

CERTIFICATE OF SERVICE RE: In the Matter of the Application of Otter Tail Power Company for Authority to Increase Rates for Electric Utility Service Docket No. E017/GR-15-1033 I, Wendi A. Olson, hereby certify that I have this day served a copy of the following, or a summary thereof, on Daniel P. Wolf and Sharon Ferguson by e-filing, and to the Office of Attorney General Antitrust & Utilities Division and all other persons on the attached service list by electronic service or by First Class mail or by personal service. Otter Tail Power Company Initial Filing Dated this 16 th day of February 2016. /s/ WENDI A. OLSON Wendi A. Olson Regulatory Filing Coordinator Otter Tail Power Company 215 South Cascade Street Fergus Falls MN 56537 (218) 739-8699

First Name Last Name Email Company Name Address Delivery Method View Trade Secret Service List Name Christopher Anderson canderson@allete.com Minnesota Power 30 W Superior St Julia Anderson Julia.Anderson@ag.state.m n.us Office of the Attorney General-DOC Duluth, MN 558022191 1800 BRM Tower 445 Minnesota St St. Paul, MN 551012134 Thomas Bailey tbailey@briggs.com Briggs And Morgan 2200 IDS Center 80 S 8th St Minneapolis, MN 55402 Ryan Barlow Ryan.Barlow@ag.state.mn. us Office of the Attorney General-RUD Electronic Service No SPL_SL_15-1033_Potentially Interested Parties - Harding Electronic Service Yes SPL_SL_15-1033_Potentially Interested Parties - Harding Electronic Service No SPL_SL_15-1033_Potentially Interested Parties - Harding 445 Minnesota Street Electronic Service Yes SPL_SL_15- Bremer Tower, Suite 1400 St. Paul, 1033_Potentially Interested Parties - Harding Minnesota 55101 Peter Beithon pbeithon@otpco.com Otter Tail Power Company P.O. Box 496 Electronic Service No SPL_SL_15-215 South Cascade Street Fergus Falls, 1033_Potentially Interested Parties - Harding MN 565380496 William Black bblack@mmua.org MMUA Suite 400 Electronic Service No SPL_SL_15-3025 Harbor Lane North Plymouth, 1033_Potentially Interested Parties - Harding MN 554475142 William A. Blazar bblazar@mnchamber.com Minnesota Chamber Of Commerce Thomas R Brause tbrause@otpco.com Otter Tail Power Company PO Box 496 215 S Cascade St Fergus Falls, MN 56538-0496 Christina Brusven cbrusven@fredlaw.com Fredrikson Byron 200 S 6th St Ste 4000 Michael J. Bull mbull@mncee.org Center for Energy and Environment Suite 1500 Electronic Service No SPL_SL_15-400 Robert Street North St. Paul, 1033_Potentially Interested Parties - Harding MN 55101 Minneapolis, MN 554021425 212 Third Ave N Ste 560 Minneapolis, MN 55401 Tammie Carino tcarino@grenergy.com Great River Energy 12300 Elm Creek Blvd. Maple Grove, MN 55369-4718 Electronic Service No SPL_SL_15-1033_Potentially Interested Parties - Harding Electronic Service No SPL_SL_15-1033_Potentially Interested Parties - Harding Electronic Service No SPL_SL_15-1033_Potentially Interested Parties - Harding Electronic Service No SPL_SL_15-1033_Potentially Interested Parties - Harding

First Name Last Name Email Company Name Address Delivery Method View Trade Secret Service List Name Ray Choquette rchoquette@agp.com Ag Processing Inc. 12700 West Dodge Road PO Box 2047 Omaha, NE 68103-2047 Electronic Service No SPL_SL_15-1033_Potentially Interested Parties - Harding Piedmont Consulting N/A Piedmont Consulting, Inc., 701 4th Ave S Ste 500 Leigh Currie lcurrie@mncenter.org Minnesota Center for Environmental Advocacy Derick O. Dahlen derick.dahlen@avantenerg y.com Minneapolis, MN 55402 26 E. Exchange St., Suite 206 St. Paul, Minnesota 55101 Avant Energy Services 220 S. Sixth St Ste 1300 Minneapolis, MN 55402 William T Davis N/A - 23456 Garland Ln Ian Dobson ian.dobson@ag.state.mn.u s Dennis R Eicher dennis@eicherconsulting.c om Office of the Attorney General-RUD Battle Lake, MN 56515-9665 D.R. Eicher Consulting, Inc. 28947 River Ridge Rd NW Paper Service No SPL_SL_15-1033_Potentially Interested Parties - Harding Electronic Service No SPL_SL_15-1033_Potentially Interested Parties - Harding Electronic Service No SPL_SL_15-1033_Potentially Interested Parties - Harding Paper Service No SPL_SL_15-1033_Potentially Interested Parties - Harding Antitrust and Utilities Division Electronic Service Yes SPL_SL_15-1033_Potentially Interested 445 Minnesota Street, 1400 Parties - Harding BRM Tower St. Paul, MN 55101 Isanti, MN 55040 James C. Erickson jericksonkbc@gmail.com Kelly Bay Consulting 17 Quechee St Superior, WI 54880-4421 Emma Fazio emma.fazio@stoel.com Stoel Rives LLP 33 South Sixth Street Suite 4200 Minneapolis, MN 55402 Electronic Service No SPL_SL_15-1033_Potentially Interested Parties - Harding Electronic Service No SPL_SL_15-1033_Potentially Interested Parties - Harding Electronic Service No SPL_SL_15-1033_Potentially Interested Parties - Harding 2

First Name Last Name Email Company Name Address Delivery Method View Trade Secret Service List Name Sharon Ferguson sharon.ferguson@state.mn.us Department of Commerce 85 7th Place E Ste 500 Saint Paul, MN 551012198 Edward Garvey garveyed@aol.com Residence 32 Lawton St John R. Gasele jgasele@fryberger.com Fryberger Buchanan Smith & Frederick PA Saint Paul, MN 55102 Bruce Gerhardson bgerhardson@otpco.com Otter Tail Power Company PO Box 496 215 S Cascade St Fergus Falls, MN 565380496 Jeffrey Haase jhaase@grenergy.com Great River Energy 12300 Elm Creek Blvd Electronic Service No SPL_SL_15-1033_Potentially Interested Parties - Harding Electronic Service No SPL_SL_15-1033_Potentially Interested Parties - Harding 700 Lonsdale Building Electronic Service No SPL_SL_15-302 West Superior Street Duluth, 1033_Potentially Interested Parties - Harding MN 55802 Maple Grove, MN 55369 Annete Henkel mui@mnutilityinvestors.org Minnesota Utility Investors 413 Wacouta Street #230 St.Paul, MN 55101 Jim Horan Jim@MREA.org Minnesota Rural Electric Association Arshia Javaherian arshia.javaherian@enbridg e.com Linda Jensen linda.s.jensen@ag.state.m n.us Richard Johnson Rick.Johnson@lawmoss.co m Enbridge Energy Office of the Attorney General-DOC Moss & Barnett 11640 73rd Ave N Maple Grove, MN 55369 26 East Superior Street Suite 309 Duluth, MN 55802 1800 BRM Tower 445 Minnesota Street St. Paul, MN 551012134 150 S. 5th Street Suite 1200 Minneapolis, MN 55402 Electronic Service No SPL_SL_15-1033_Potentially Interested Parties - Harding Electronic Service No SPL_SL_15-1033_Potentially Interested Parties - Harding Electronic Service No SPL_SL_15-1033_Potentially Interested Parties - Harding Electronic Service No SPL_SL_15-1033_Potentially Interested Parties - Harding Electronic Service No SPL_SL_15-1033_Potentially Interested Parties - Harding Electronic Service Yes SPL_SL_15-1033_Potentially Interested Parties - Harding Electronic Service No SPL_SL_15-1033_Potentially Interested Parties - Harding 3

First Name Last Name Email Company Name Address Delivery Method View Trade Secret Service List Name J. Vincent Jones vince.jones@woodsfuller.c om Woods, Fuller, Shultz & Smith P.C. 300 S Phillips Ave Ste 300 PO Box 5027 Sioux Falls, SD 57117-5027 Michael Krikava mkrikava@briggs.com Briggs And Morgan, P.A. 2200 IDS Center 80 S 8th St Minneapolis, MN 55402 James D. Larson james.larson@avantenergy.com Elizabeth A. Lewis elizabeth.lewis@woodsfulle r.com Avant Energy Services 220 S 6th St Ste 1300 Woods, Fuller, Shultz & Smith P.C. John Lindell agorud.ecf@ag.state.mn.us Office of the Attorney General-RUD Peter Madsen peter.madsen@ag.state.m n.us Office of the Attorney General-DOC Minneapolis, MN 55402 300 S Phillips Ave Ste 300 PO Box 5027 Sioux Falls, SD 57117-5027 1400 BRM Tower 445 Minnesota St St. Paul, MN 551012130 Bremer Tower, Suite 1800 445 Minnesota Street St. Paul, Minnesota 55101 Kavita Maini kmaini@wi.rr.com KM Energy Consulting LLC 961 N Lost Woods Rd Pam Marshall pam@energycents.org Energy CENTS Coalition 823 7th St E Patrick Mastel N/A Missouri River Energy Services Oconomowoc, WI 53066 St. Paul, MN 55106 3724 W. Avera Drive PO Box 88920 Sioux Falls, SD 57109-8920 Sara G McGrane smcgrane@felhaber.com Felhaber Larson 220 S 6th St Ste 2200 Minneapolis, MN 55420 Electronic Service No SPL_SL_15-1033_Potentially Interested Parties - Harding Electronic Service No SPL_SL_15-1033_Potentially Interested Parties - Harding Electronic Service No SPL_SL_15-1033_Potentially Interested Parties - Harding Electronic Service No SPL_SL_15-1033_Potentially Interested Parties - Harding Electronic Service Yes SPL_SL_15-1033_Potentially Interested Parties - Harding Electronic Service Yes SPL_SL_15-1033_Potentially Interested Parties - Harding Electronic Service No SPL_SL_15-1033_Potentially Interested Parties - Harding Electronic Service No SPL_SL_15-1033_Potentially Interested Parties - Harding Paper Service No SPL_SL_15-1033_Potentially Interested Parties - Harding Electronic Service No SPL_SL_15-1033_Potentially Interested Parties - Harding 4

First Name Last Name Email Company Name Address Delivery Method View Trade Secret Service List Name Brian Meloy brian.meloy@stinson.com Stinson,Leonard, Street LLP Tim Miller_ N/A Missouri River Energy Services 150 S 5th St Ste 2300 Minneapolis, MN 55402 3724 W. Avera Drive PO Box 88920 Sioux Falls, SD 57109-8920 Andrew Moratzka apmoratzka@stoel.com Stoel Rives LLP 33 South Sixth Street Suite 4200 Minneapolis, MN 55402 Darrell Nitschke dnitschk@nd.gov North Dakota Public Service Commission Gary Oetken goetken@agp.com Ag Processing, Inc. 12700 West Dodge Road P.O. Box 2047 Omaha, NE 681032047 Lisa Pickard lpickard@minnkota.com Minnkota Power Cooperative Electronic Service No SPL_SL_15-1033_Potentially Interested Parties - Harding Paper Service No SPL_SL_15-1033_Potentially Interested Parties - Harding Electronic Service No SPL_SL_15-1033_Potentially Interested Parties - Harding 600 E. Boulevard Avenue Electronic Service No SPL_SL_15- State Capital, 12th Floor, Dept 408 1033_Potentially Interested Parties - Harding Bismarck, ND 585050480 1822 Mill Rd PO Box 13200 Grand Forks, ND 582083200 Marcia Podratz mpodratz@mnpower.com Minnesota Power 30 W Superior S Duluth, MN 55802 Charles Riesen criesen@minnkota.com PKM Electric Cooperative 406 North Minnesota Street PO Box 108 Warren, MN 567620108 Steve Sanda 101 Park Circle Ottertail City, MN 565717003 Electronic Service No SPL_SL_15-1033_Potentially Interested Parties - Harding Electronic Service No SPL_SL_15-1033_Potentially Interested Parties - Harding Electronic Service No SPL_SL_15-1033_Potentially Interested Parties - Harding Electronic Service No SPL_SL_15-1033_Potentially Interested Parties - Harding Paper Service No SPL_SL_15-1033_Potentially Interested Parties - Harding 5

First Name Last Name Email Company Name Address Delivery Method View Trade Secret Service List Name Richard Savelkoul rsavelkoul@martinsquires.c om Martin & Squires, P.A. 332 Minnesota Street Ste W2750 St. Paul, MN 55101 Larry L. Schedin Larry@LLSResources.com LLS Resources, LLC 12 S 6th St Ste 1137 Minneapolis, MN 55402 Electronic Service No SPL_SL_15-1033_Potentially Interested Parties - Harding Electronic Service No SPL_SL_15-1033_Potentially Interested Parties - Harding Michael Schmidt mschmidt@minnkota.com PKM Electric Coop Inc PO Box 108 Electronic Service No SPL_SL_15-406 North Minnesota St Warren, 1033_Potentially Interested Parties - Harding MN 56762 Christopher Schoenherr cp.schoenherr@smmpa.or g Robert H. Schulte rhs@schulteassociates.co m Janet Shaddix Elling jshaddix@janetshaddix.co m SMMPA Schulte Associates LLC Mrg Simon mrgsimon@mrenergy.com Missouri River Energy Services Cari Snaza cari.snaza@state.mn.us Office of Administrative Hearings 500 First Ave SW Rochester, MN 55902-3303 1742 Patriot Rd Northfield, MN 55057 Electronic Service No SPL_SL_15-1033_Potentially Interested Parties - Harding Electronic Service No SPL_SL_15-1033_Potentially Interested Parties - Harding Shaddix And Associates Ste 122 Electronic Service Yes SPL_SL_15-9100 W Bloomington Frwy Bloomington, 1033_Potentially Interested Parties - Harding MN 55431 3724 W. Avera Drive P.O. Box 88920 Sioux Falls, SD 571098920 PO Box 64620 St. Paul, MN 55155 Ron Spangler, Jr. rlspangler@otpco.com Otter Tail Power Company 215 So. Cascade St. PO Box 496 Fergus Falls, MN 565380496 SaGonna Thompson Regulatory.records@xcele nergy.com Xcel Energy 414 Nicollet Mall FL 7 Minneapolis, MN 554011993 Electronic Service No SPL_SL_15-1033_Potentially Interested Parties - Harding Electronic Service Yes SPL_SL_15-1033_Potentially Interested Parties - Harding Electronic Service No SPL_SL_15-1033_Potentially Interested Parties - Harding Electronic Service No SPL_SL_15-1033_Potentially Interested Parties - Harding 6

First Name Last Name Email Company Name Address Delivery Method View Trade Secret Service List Name Stuart Tommerdahl stommerdahl@otpco.com Otter Tail Power Company 215 S Cascade St PO Box 496 Fergus Falls, MN 56537 Patricia Van Gerpen patty.vangerpen@state.sd. us South Dakota Public Utilities Commission Kevin Walli kwalli@fryberger.com Fryberger, Buchanan, Smith & Frederick State Capitol Building 500 E Capitol Ave Pierre, SD 57501-5070 380 St. Peter St Ste 710 St. Paul, MN 55102 Daniel P Wolf dan.wolf@state.mn.us Public Utilities Commission 121 7th Place East Suite 350 St. Paul, MN 551012147 Electronic Service No SPL_SL_15-1033_Potentially Interested Parties - Harding Electronic Service No SPL_SL_15-1033_Potentially Interested Parties - Harding Electronic Service No SPL_SL_15-1033_Potentially Interested Parties - Harding Electronic Service Yes SPL_SL_15-1033_Potentially Interested Parties - Harding 7

First Name Last Name Email Company Name Address Delivery Method View Trade Secret Service List Name Christopher Anderson canderson@allete.com Minnesota Power 30 W Superior St Julia Anderson Julia.Anderson@ag.state.m n.us Office of the Attorney General-DOC Duluth, MN 558022191 1800 BRM Tower 445 Minnesota St St. Paul, MN 551012134 Thomas Bailey tbailey@briggs.com Briggs And Morgan 2200 IDS Center 80 S 8th St Minneapolis, MN 55402 William A. Blazar bblazar@mnchamber.com Minnesota Chamber Of Commerce Thomas R Brause tbrause@otpco.com Otter Tail Power Company PO Box 496 215 S Cascade St Fergus Falls, MN 56538-0496 Tammie Carino tcarino@grenergy.com Great River Energy 12300 Elm Creek Blvd. Electronic Service No OFF_SL_15-1033_GR-15-1033 Electronic Service Yes OFF_SL_15-1033_GR-15-1033 Electronic Service No OFF_SL_15-1033_GR-15-1033 Suite 1500 Electronic Service No OFF_SL_15-1033_GR-15-400 Robert Street North 1033 St. Paul, MN 55101 Maple Grove, MN 55369-4718 Ray Choquette rchoquette@agp.com Ag Processing Inc. 12700 West Dodge Road PO Box 2047 Omaha, NE 68103-2047 Derick O. Dahlen derick.dahlen@avantenerg y.com Avant Energy Services 220 S. Sixth St Ste 1300 Minneapolis, MN 55402 William T Davis N/A - 23456 Garland Ln Ian Dobson ian.dobson@ag.state.mn.u s Office of the Attorney General-RUD Battle Lake, MN 56515-9665 Electronic Service No OFF_SL_15-1033_GR-15-1033 Electronic Service No OFF_SL_15-1033_GR-15-1033 Electronic Service No OFF_SL_15-1033_GR-15-1033 Electronic Service No OFF_SL_15-1033_GR-15-1033 Paper Service No OFF_SL_15-1033_GR-15-1033 Antitrust and Utilities Electronic Service No OFF_SL_15-1033_GR-15- Division 1033 445 Minnesota Street, 1400 BRM Tower St. Paul, MN 55101

First Name Last Name Email Company Name Address Delivery Method View Trade Secret Service List Name James C. Erickson jericksonkbc@gmail.com Kelly Bay Consulting 17 Quechee St Superior, WI 54880-4421 Emma Fazio emma.fazio@stoel.com Stoel Rives LLP 33 South Sixth Street Suite 4200 Minneapolis, MN 55402 Thomas E. Ferguson N/A Ferguson Consulting, LLC 5740 Kehtel Rd Sharon Ferguson sharon.ferguson@state.mn.us Duluth, MN 55811 Department of Commerce 85 7th Place E Ste 500 Saint Paul, MN 551012198 Edward Garvey garveyed@aol.com Residence 32 Lawton St Saint Paul, MN 55102 Bruce Gerhardson bgerhardson@otpco.com Otter Tail Power Company PO Box 496 215 S Cascade St Fergus Falls, MN 565380496 Annete Henkel mui@mnutilityinvestors.org Minnesota Utility Investors 413 Wacouta Street #230 St.Paul, MN 55101 Shane Henriksen shane.henriksen@enbridge.com Richard Johnson Rick.Johnson@lawmoss.co m J. Vincent Jones vince.jones@woodsfuller.c om Enbridge Energy Company, Inc. Moss & Barnett Woods, Fuller, Shultz & Smith P.C. 1409 Hammond Ave FL 2 Superior, WI 54880 150 S. 5th Street Suite 1200 Minneapolis, MN 55402 300 S Phillips Ave Ste 300 PO Box 5027 Sioux Falls, SD 57117-5027 Electronic Service No OFF_SL_15-1033_GR-15-1033 Electronic Service No OFF_SL_15-1033_GR-15-1033 Paper Service No OFF_SL_15-1033_GR-15-1033 Electronic Service No OFF_SL_15-1033_GR-15-1033 Electronic Service No OFF_SL_15-1033_GR-15-1033 Electronic Service Yes OFF_SL_15-1033_GR-15-1033 Electronic Service No OFF_SL_15-1033_GR-15-1033 Electronic Service No OFF_SL_15-1033_GR-15-1033 Electronic Service No OFF_SL_15-1033_GR-15-1033 Electronic Service No OFF_SL_15-1033_GR-15-1033 2

First Name Last Name Email Company Name Address Delivery Method View Trade Secret Service List Name Joel W. Kanvik joel.kanvik@enbridge.com Enbridge Energy Company, Inc. Bill Lachowitzer blachowitzer@ibewlocal94 9.org Douglas Larson dlarson@dakotaelectric.co m James D. Larson james.larson@avantenergy.com Elizabeth A. Lewis elizabeth.lewis@woodsfulle r.com IBEW Local Union 949 Dakota Electric Association 26 E Superior St Ste 309 Duluth, MN 55802 12908 Nicollet Ave S Burnsville, MN 55337-3527 4300 220th St W Farmington, MN 55024 Avant Energy Services 220 S 6th St Ste 1300 Woods, Fuller, Shultz & Smith P.C. John Lindell agorud.ecf@ag.state.mn.us Office of the Attorney General-RUD Minneapolis, MN 55402 300 S Phillips Ave Ste 300 PO Box 5027 Sioux Falls, SD 57117-5027 1400 BRM Tower 445 Minnesota St St. Paul, MN 551012130 Pam Marshall pam@energycents.org Energy CENTS Coalition 823 7th St E Tom Micheletti tommicheletti@excelsioren ergy.com St. Paul, MN 55106 Excelsior Energy Inc. 225 S 6th St Ste 2560 Minneapolis, MN 55402-4638 Andrew Moratzka apmoratzka@stoel.com Stoel Rives LLP 33 South Sixth Street Suite 4200 Minneapolis, MN 55402 Jeffrey L. Nelson jnelson@eastriver.coop East River Electric Power Coop. 121 SE First Street PO Box 227 Madison, SD 57042 Electronic Service No OFF_SL_15-1033_GR-15-1033 Electronic Service No OFF_SL_15-1033_GR-15-1033 Electronic Service No OFF_SL_15-1033_GR-15-1033 Electronic Service No OFF_SL_15-1033_GR-15-1033 Electronic Service No OFF_SL_15-1033_GR-15-1033 Electronic Service Yes OFF_SL_15-1033_GR-15-1033 Electronic Service No OFF_SL_15-1033_GR-15-1033 Electronic Service No OFF_SL_15-1033_GR-15-1033 Electronic Service No OFF_SL_15-1033_GR-15-1033 Electronic Service No OFF_SL_15-1033_GR-15-1033 3

First Name Last Name Email Company Name Address Delivery Method View Trade Secret Service List Name Gary Oetken goetken@agp.com Ag Processing, Inc. 12700 West Dodge Road P.O. Box 2047 Omaha, NE 681032047 Electronic Service No OFF_SL_15-1033_GR-15-1033 David G. Prazak dprazak@otpco.com Otter Tail Power Company P.O. Box 496 Electronic Service No OFF_SL_15-1033_GR-15-215 South Cascade Street 1033 Fergus Falls, MN 565380496 Anna K Roberts aroberts@otpco.com Otter Tail Power Company 215 S Cascade St PO Box 496 Fergus Falls, MN 56538-0496 Tim Rogelstad trogelstad@otpco.com Otter Tail Power Company 215 South Cascade Street Richard Savelkoul rsavelkoul@martinsquires.c om Martin & Squires, P.A. Fergus Falls, MN 56538 332 Minnesota Street Ste W2750 St. Paul, MN 55101 Electronic Service No OFF_SL_15-1033_GR-15-1033 Electronic Service Yes OFF_SL_15-1033_GR-15-1033 Electronic Service No OFF_SL_15-1033_GR-15-1033 Larry L. Schedin Larry@LLSResources.com LLS Resources, LLC 12 S 6th St Ste 1137 Robert H. Schulte rhs@schulteassociates.co m Schulte Associates LLC Mrg Simon mrgsimon@mrenergy.com Missouri River Energy Services Minneapolis, MN 55402 1742 Patriot Rd Northfield, MN 55057 3724 W. Avera Drive P.O. Box 88920 Sioux Falls, SD 571098920 Ron Spangler, Jr. rlspangler@otpco.com Otter Tail Power Company 215 So. Cascade St. PO Box 496 Fergus Falls, MN 565380496 William Taylor bill.taylor@williamgtaylor.co m Taylor Law Firm 2921 E 57th St PO Box 10, Sioux Falls SD Electronic Service No OFF_SL_15-1033_GR-15-1033 Electronic Service No OFF_SL_15-1033_GR-15-1033 Electronic Service No OFF_SL_15-1033_GR-15-1033 Electronic Service Yes OFF_SL_15-1033_GR-15-1033 Electronic Service No OFF_SL_15-1033_GR-15-1033 4

First Name Last Name Email Company Name Address Delivery Method View Trade Secret Service List Name SaGonna Thompson Regulatory.records@xcele nergy.com Xcel Energy 414 Nicollet Mall FL 7 Minneapolis, MN 554011993 Pat Treseler pat.jcplaw@comcast.net Paulson Law Office LTD Suite 325 7301 Ohms Lane Edina, MN 55439 Cam Winton cwinton@mnchamber.com Minnesota Chamber of Commerce 400 Robert Street North Suite 1500 St. Paul, Minnesota 55101 Daniel P Wolf dan.wolf@state.mn.us Public Utilities Commission 121 7th Place East Suite 350 St. Paul, MN 551012147 Electronic Service No OFF_SL_15-1033_GR-15-1033 Electronic Service No OFF_SL_15-1033_GR-15-1033 Electronic Service No OFF_SL_15-1033_GR-15-1033 Electronic Service Yes OFF_SL_15-1033_GR-15-1033 5

First Name Last Name Email Company Name Address Delivery Method View Trade Secret Service List Name Christopher Anderson canderson@allete.com Minnesota Power 30 W Superior St Duluth, MN 558022191 Ray Choquette rchoquette@agp.com Ag Processing Inc. 12700 West Dodge Road PO Box 2047 Omaha, NE 68103-2047 James C. Erickson jericksonkbc@gmail.com Kelly Bay Consulting 17 Quechee St Sharon Ferguson sharon.ferguson@state.mn.us Superior, WI 54880-4421 Department of Commerce 85 7th Place E Ste 500 Saint Paul, MN 551012198 Bruce Gerhardson bgerhardson@otpco.com Otter Tail Power Company PO Box 496 215 S Cascade St Fergus Falls, MN 565380496 Shane Henriksen shane.henriksen@enbridge.com Richard Johnson Rick.Johnson@lawmoss.co m Douglas Larson dlarson@dakotaelectric.co m James D. Larson james.larson@avantenergy.com Enbridge Energy Company, Inc. Moss & Barnett Dakota Electric Association John Lindell agorud.ecf@ag.state.mn.us Office of the Attorney General-RUD 1409 Hammond Ave FL 2 Superior, WI 54880 150 S. 5th Street Suite 1200 Minneapolis, MN 55402 4300 220th St W Farmington, MN 55024 Avant Energy Services 220 S 6th St Ste 1300 Minneapolis, MN 55402 1400 BRM Tower 445 Minnesota St St. Paul, MN 551012130 Kavita Maini kmaini@wi.rr.com KM Energy Consulting LLC 961 N Lost Woods Rd Oconomowoc, WI 53066 Electronic Service No GEN_SL_Otter Tail Power Company_General Service List - Rate Case Electronic Service No GEN_SL_Otter Tail Power Company_General Service List - Rate Case Electronic Service No GEN_SL_Otter Tail Power Company_General Service List - Rate Case Electronic Service No GEN_SL_Otter Tail Power Company_General Service List - Rate Case Electronic Service No GEN_SL_Otter Tail Power Company_General Service List - Rate Case Electronic Service No GEN_SL_Otter Tail Power Company_General Service List - Rate Case Electronic Service No GEN_SL_Otter Tail Power Company_General Service List - Rate Case Electronic Service No GEN_SL_Otter Tail Power Company_General Service List - Rate Case Electronic Service No GEN_SL_Otter Tail Power Company_General Service List - Rate Case Electronic Service No GEN_SL_Otter Tail Power Company_General Service List - Rate Case Electronic Service No GEN_SL_Otter Tail Power Company_General Service List - Rate Case

First Name Last Name Email Company Name Address Delivery Method View Trade Secret Service List Name Andrew Moratzka apmoratzka@stoel.com Stoel Rives LLP 33 South Sixth Street Suite 4200 Minneapolis, MN 55402 Gary Oetken goetken@agp.com Ag Processing, Inc. 12700 West Dodge Road P.O. Box 2047 Omaha, NE 681032047 Matt Olsen molsen@otpco.com Otter Tail Power Company 215 South Cascade Street Fergus Falls, MN 56537 Larry L. Schedin Larry@LLSResources.com LLS Resources, LLC 12 S 6th St Ste 1137 Minneapolis, MN 55402 Cary Stephenson cstephenson@otpco.com Otter Tail Power Company 215 South Cascade Street Fergus Falls, MN 56537 Stuart Tommerdahl stommerdahl@otpco.com Otter Tail Power Company 215 S Cascade St PO Box 496 Fergus Falls, MN 56537 Daniel P Wolf dan.wolf@state.mn.us Public Utilities Commission 121 7th Place East Suite 350 St. Paul, MN 551012147 Patrick Zomer Patrick.Zomer@lawmoss.c om Moss & Barnett a Professional Association 150 S. 5th Street, #1200 Minneapolis, MN 55402 Electronic Service No GEN_SL_Otter Tail Power Company_General Service List - Rate Case Electronic Service No GEN_SL_Otter Tail Power Company_General Service List - Rate Case Electronic Service No GEN_SL_Otter Tail Power Company_General Service List - Rate Case Electronic Service No GEN_SL_Otter Tail Power Company_General Service List - Rate Case Electronic Service No GEN_SL_Otter Tail Power Company_General Service List - Rate Case Electronic Service No GEN_SL_Otter Tail Power Company_General Service List - Rate Case Electronic Service No GEN_SL_Otter Tail Power Company_General Service List - Rate Case Electronic Service No GEN_SL_Otter Tail Power Company_General Service List - Rate Case 2

First Name Last Name Email Company Name Address Delivery Method View Trade Secret Service List Name Julia Anderson Julia.Anderson@ag.state.m n.us Office of the Attorney General-DOC 1800 BRM Tower 445 Minnesota St St. Paul, MN 551012134 Christopher Anderson canderson@allete.com Minnesota Power 30 W Superior St Electronic Service Yes OFF_SL_10-239_Official Electronic Service No OFF_SL_10-239_Official Duluth, MN 558022191 Thomas Bailey tbailey@briggs.com Briggs And Morgan 2200 IDS Center 80 S 8th St Minneapolis, MN 55402 Electronic Service No OFF_SL_10-239_Official William A. Blazar bblazar@mnchamber.com Minnesota Chamber Of Commerce Tammie Carino tcarino@grenergy.com Great River Energy 12300 Elm Creek Blvd. Suite 1500 Electronic Service No OFF_SL_10-239_Official 400 Robert Street North St. Paul, MN 55101 Maple Grove, MN 55369-4718 Electronic Service No OFF_SL_10-239_Official Ray Choquette rchoquette@agp.com Ag Processing Inc. 12700 West Dodge Road PO Box 2047 Omaha, NE 68103-2047 Piedmont Consulting N/A Piedmont Consulting, Inc., 701 4th Ave S Ste 500 Electronic Service No OFF_SL_10-239_Official Paper Service No OFF_SL_10-239_Official Minneapolis, MN 55402 Derick O. Dahlen derick.dahlen@avantenerg y.com Avant Energy Services 220 S. Sixth St Ste 1300 Minneapolis, MN 55402 William T Davis N/A - 23456 Garland Ln Electronic Service No OFF_SL_10-239_Official Paper Service No OFF_SL_10-239_Official Ian Dobson ian.dobson@ag.state.mn.u s Office of the Attorney General-RUD Battle Lake, MN 56515-9665 Antitrust and Utilities Electronic Service No OFF_SL_10-239_Official Division 445 Minnesota Street, 1400 BRM Tower St. Paul, MN 55101

First Name Last Name Email Company Name Address Delivery Method View Trade Secret Service List Name James C. Erickson jericksonkbc@gmail.com Kelly Bay Consulting 17 Quechee St Electronic Service No OFF_SL_10-239_Official Superior, WI 54880-4421 Emma Fazio emma.fazio@stoel.com Stoel Rives LLP 33 South Sixth Street Suite 4200 Minneapolis, MN 55402 Thomas E. Ferguson N/A Ferguson Consulting, LLC 5740 Kehtel Rd Electronic Service No OFF_SL_10-239_Official Paper Service No OFF_SL_10-239_Official Duluth, MN 55811 Sharon Ferguson sharon.ferguson@state.mn.us Department of Commerce 85 7th Place E Ste 500 Saint Paul, MN 551012198 Edward Garvey garveyed@aol.com Residence 32 Lawton St Electronic Service No OFF_SL_10-239_Official Electronic Service No OFF_SL_10-239_Official Saint Paul, MN 55102 Bruce Gerhardson bgerhardson@otpco.com Otter Tail Power Company PO Box 496 215 S Cascade St Fergus Falls, MN 565380496 Annete Henkel mui@mnutilityinvestors.org Minnesota Utility Investors 413 Wacouta Street #230 St.Paul, MN 55101 Electronic Service Yes OFF_SL_10-239_Official Electronic Service No OFF_SL_10-239_Official Shane Henriksen shane.henriksen@enbridge.com Richard Johnson Rick.Johnson@lawmoss.co m J. Vincent Jones vince.jones@woodsfuller.c om Enbridge Energy Company, Inc. Moss & Barnett Woods, Fuller, Shultz & Smith P.C. 1409 Hammond Ave FL 2 Superior, WI 54880 150 S. 5th Street Suite 1200 Minneapolis, MN 55402 300 S Phillips Ave Ste 300 PO Box 5027 Sioux Falls, SD 57117-5027 Electronic Service Yes OFF_SL_10-239_Official Electronic Service No OFF_SL_10-239_Official Electronic Service No OFF_SL_10-239_Official 2