Contractors

We value the relationships we have with our contractors. When it comes to external support, our contractors are extensions of our team. We evaluate our contractors based on quality, experience, cost, safety performance, adherence to cybersecurity requirements, and other applicable business criteria. Our goal is to increase our awareness of diverse suppliers in our geographic region and track our spend by supplier diversity business classifications.

We expect contractors to abide by:

• The Otter Tail Power Company Contractor Code of Business Ethics,
• The Otter Tail Power Company Contractor Safety Policy,
• The Otter Tail Corporation Human Rights Policy, and
• Federal Equal Opportunity requirements.

Contractors must conform to applicable governmental permits, cybersecurity standards, applicable safety standards, licenses, and laws, meet or exceed all OSHA requirements, and meet or exceed all reporting requirements for the accidental release of hazardous materials.

To learn more about providing goods or services to Otter Tail Power Company, email [email protected].

Requests for Proposals (RFPs)

Big Stone South to Hankinson to Bison 345-kV transmission line development consulting

The transmission system along where the Midcontinent Independent System Operator and Southwest Power Pool Regional Transmission Operators regions meet is at capacity. The Big Stone South to Hankinson to Bison 345-kV transmission line will resolve transmission constraints and provide substantial reliability benefits.

We, as a co-owner with Xcel Energy, intend to construct, own, and operate this transmission line. This RFP describes the scope of work for the development phase only. 

Bidder shall indicate their intent to bid by brief email to [email protected] (cc: [email protected]) on or before July 25, 2025, at 5:00 p.m. (CT).

Proposal due date is August 15, 2025, at 5:00 p.m. (CT).

RFP documents: 

• Development Consulting RFP (complete document) - PDF
• Appendix A - Major Professional Services Agreement (MPSA) - Word
• Exhibit A - MPSA General Conditions - Word
• Exhibit C - MPSA Insurance Requirements - Word 
• Exhibit F - Rates and Unit Pricing - Excel
• Attachment 4.1 - Question and Answer Template - Excel
• Attachment 4.2 - Commercial and Technical Exceptions Template - Excel
• Study Area - PDF
• BSSHB Substations And Study Area

North Dakota Transmission Authority Grant Project for transmission and distribution line hardware

The project will provide increased awareness of grid conditions and enable new and more efficient processes, allowing us to reduce the magnitude and duration of grid outages caused by major disruptive storm and non-storm events.

Bidder shall indicate their intent to bid by brief e-mail to [email protected] on or before July 25, 2025, at 5:00 p.m. (CT).

Proposal due date is August 22, 2025, at 5:00 p.m. (CT).

RFP documents: 

• NDTA Line Hardware RFP - PDF
• Major Supply Agreement - Word
• Exhibit A - General Terms And Conditions - Word
• Exhibit A1 - Special Terms And Conditions Flow Down Requirements - Word
• Exhibit F - Schedule Of Values - Excel
• Attachment 1 - Bid Exceptions Form - PDF
• Attachment 2 Question and Answer Template - Excel

North Dakota Transmission Authority Grant Project for direct embedded steel poles

The project will provide increased awareness of grid conditions and enable new and more efficient processes, allowing us to reduce the magnitude and duration of grid outages caused by major disruptive storm and non-storm events.

Bidder shall indicate their intent to bid by brief e-mail to [email protected] on or before August 1, 2025, at 5:00 p.m. (CT).

Proposal due date is August 27, 2025, at 5:00 p.m. (CT).

RFP documents: 

• NDTA Direct Embedded Steel Pole RFP - PDF
• Major Supply Agreement - Word
• Exhibit A - General Conditions for Major Supply Agreement - Word
• Exhibit A1 - Special Terms and Conditions Flow Down Requirements - Word
• Exhibit E - Project Schedule - Word
• Exhibit F - Schedule of Values - Excel
• Attachment 1 - Bid Exceptions Form - PDF
• Attachment 2 - Question and Answer Template - Excel

North Dakota Transmission Authority Grant Project for transmission and distribution wood poles

The project will provide increased awareness of grid conditions and enable new and more efficient processes, allowing us to reduce the magnitude and duration of grid outages caused by major disruptive storm and non-storm events.

Bidder shall indicate their intent to bid by brief e-mail to [email protected] on or before August 1, 2025.

Questions due date is August 06, 2025.

Proposals due date is August 13, 2025, at 5:00 p.m. (CT).

RFP documents: 

• NDTA 20250528 Wood Pole RFP
• (MSA(NO Install) NDTA Distribution And Transmission Wood Pole
• Exhibit A General Terms And Conditions
• Exhibit A1 Special Terms And Conditions Flow Down Requirements
• Exhibit F Schedule Of Values
• Attachment 3 Bid Exceptions Form
• Attachment 4 Question And Answer Template