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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
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
