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EL25-022 - In the Matter of the Application of Otter Tail Power Company for Authority to Increase Its Electric Rates in South Dakota
Date Filed: 06/04/25 ♦ Intervention Date: 07/17/25
Date of Notice of Filing: 06/05/25 ♦ Pending
Agendas:
June 17, 2025, Agenda of Commission Meeting
October 23, 2025, Agenda of Commission Meeting
March 10, 2026, Agenda of Commission Meeting
Minutes:
Minutes of the June 17, 2025, Commission Meeting
Minutes of the October 23, 2025, Commission Meeting
Minutes of the March 10, 2026, Commission Meeting
Click For Comments and Responses
Electric Rate Increase Request Information Guide
Orders:- 06/18/25 - Order Suspending Operation of Proposed Rates; Order Assessing Filing Fee; Order Authorizing Executive Director to Enter into Consulting Contracts
- 10/27/25 - Order Granting Joint Motion for Approval of Procedural Schedule
- 03/12/26 - Order Approving Settlement Stipulation; Interim Refund Plan; Order Approving Tariff Revisions
- 06/04/25 - Otter Tail Power Company's Volumes 1, 2, 3, 4
- Volume 2 - Direct Testimony and Supporting Schedules
- Volume 3 - Tariffs
- Volume 4 - Workpapers and Supporting Information
- 06/05/25 - Staff’s First Set of Data Requests Certificate of Service
- 06/09/25 - Otter Tail Power Company’s Request for Confidential Treatment
- 06/27/25 - Staff’s Second Set of Data Requests Certificate of Service
- 07/23/25 - Staff’s Third Set of Data Requests Certificate of Service
- 08/01/25 - Staff’s Fourth Set of Data Requests Certificate of Service
- 08/01/25 - Staff’s Amended Fourth Set of Data Requests Certificate of Service
- 08/14/25 - Staff’s Fifth Set of Data Requests Certificate of Service
- 09/02/25 - Staff’s Sixth Set of Data Requests Certificate of Service
- 09/25/25 - Staff’s Seventh Set of Data Requests Certificate of Service
- 10/03/25 - Staff’s Eighth Set of Data Requests Certificate of Service
- 10/10/25 - Joint Motion for Approval of Procedural Schedule
- 10/15/25 - Staff’s Ninth Set of Data Requests Certificate of Service
- 10/31/25 - Otter Tail Power Company’s Letter regarding Notice of Intent to Implement Interim Rates
- Affidavit of Service and Service List
- Notice of Intent to Implement Interim Rates
- Attachment A - Comparison of Operating Revenues Under Present and Proposed Base Rates by Rate Schedule
- Attachment B - Bill Comparison of Current Rates and Interim Rates
- Attachment C
- Attachment D - Report of Tariff Schedule Change
- Attachment E - Proposed Customer Notice
- Attachment F - TCRR and PIR Schedules
- 11/04/25 - Otter Tail Power Company’s Amended Residential Rate Design Letter
- 11/10/25 - Staff’s Tenth Set of Data Requests Certificate of Service
- 11/19/25 - Staff’s Eleventh Set of Data Requests Certificate of Service
- 01/14/26 - Otter Tail Power Company’s Settlement in Principle Letter
- 02/06/26 - Otter Tail Power Company’s Letter regarding Revised Interim Tariff Pages and Service List
- 03/02/26 - Otter Tail Power Company's Letter regarding Joint Motion for Approval of Settlement Stipulation
- Affidavit of Service and Service List
- Joint Motion for Approval of Settlement Stipulation
- Settlement Stipulation
- 03/02/26 - PUC Staff Memorandum Supporting Settlement Stipulation
- PUC Staff Memorandum Supporting Settlement Stipulation Confidential (not available to the public)
- Attachment A - Summary of Revenue Requirement Issues
- Attachment A - Summary of Revenue Requirement Issues Confidential (not available to the public)
- Revenue Requirement
- Exhibit___(PJS-1) Schedule 1 - SD Electric Revenue Requirement
- Exhibit___(PJS-1) Schedule 2 - SD Electric Operating Income Statement Summary
- Exhibit___(PJS-1) Schedule 3 - SD Electric Operating Income Statement with Known and Measurable Adjustments
- Exhibit___(PJS-1) Schedule 3 - SD Electric Operating Income Statement with Known and Measurable Adjustments Confidential (not available to the public)
- Exhibit___(PJS-2) Schedule 1 - SD Electric Rate Base Summary
- Exhibit___(PJS-2) Schedule 2 - SD Electric Rate Base with Known and Measurable Adjustments
- Exhibit___(PJS-2) Schedule 2 - SD Electric Rate Base with Known and Measurable Adjustments Confidential (not available to the public)
- Exhibit___(PJS-3) - Interest Synchronization
- Exhibit___(PJS-4) - Cash Working Capital
- Exhibit___(PJS-5) - Tax Collections Available
- Exhibit___(PJS-6) - Working Capital Updates
- Exhibit___(BAM-1) - Association Dues
- Exhibit___(BAM-2) - Advertising
- Exhibit___(BAM-3) - Bad Debt
- Exhibit___(BAM-4) - Plant Outage Normalization
- Exhibit___(BAM-5) - Schedule 1 - Plant Annualization and Post-Test Year Plant
- Exhibit___(BAM-5) - Schedule 2 - Plant Annualization and Post-Test Year Plant Detail
- Exhibit___(BAM-6) - Retail Revenues
- Exhibit___(BAM-6) - Retail Revenues Confidential (not available to the public)
- Exhibit___(BAM-7) - Rider Details
- Exhibit___(BAM-7) - Rider Details Confidential (not available to the public)
- Exhibit___(EJP-1) - Labor Census and Rates
- Exhibit___(EJP-1) - Labor Census and Rates Confidential (not available to the public)
- Exhibit___(EJP-2) - Rate Case Expense
- Exhibit___(EJP-3) - Vegetative Maintenance
- Exhibit___(EJP-4) - Renewable Energy Credit
- Exhibit___(BLC-1) Schedule 1 - Cost of Capital
- Exhibit___(BLC-1) Schedule 1 - Cost of Capital Confidential (not available to the public)
- Exhibit___(RP-1) - Medical/Dental, Pension, OPEB
- Exhibit___(RP-2) - Employee Benefits Expense
- Exhibit___(RP-3) - Incentive Compensation
- Exhibit___(RP-3) - Incentive Compensation Confidential (not available to the public)
- Rate Design
- Exhibit___(JMR-1) Schedule 1 - Total Bill Summary
- Exhibit___(JMR-1) Schedule 2 - Revenue Increase by Customer Class
- Exhibit___(JMR-1) Schedule 3-1 - Residential Rate Schedules
- Exhibit___(JMR-1) Schedule 3-2 - Farm Service Rate Schedules
- Exhibit___(JMR-1) Schedule 3-3 - General Service Rate Schedules
- Exhibit___(JMR-1) Schedule 3-4 - Large General Service Rate Schedules
- Exhibit___(JMR-1) Schedule 3-5 - Outdoor Lighting Rate Schedules
- Exhibit___(JMR-1) Schedule 3-6 - Controlled Service Deferred Load Rate Schedules
- Exhibit___(JMR-1) Schedule 3-7 - Controlled Service Interruptible Rate Schedules
- Exhibit___(JMR-1) Schedule 3-8 - Controlled Service Off Peak Rate Schedules
- Exhibit___(JMR-1) Schedule 4 - Residential Services Bill Comparison
- Exhibit___(JMR-1) Schedule 5 - Residential Customer Distribution
- 03/26/26 - Otter Tail Power Company’s Letter regarding Revised Tariff Pages
- 03/31/26 - Otter Tail Power Company’s Letter regarding Revised Tariff Pages
