Capacity, Energy, and Ancillary Services Supply

Montana-Dakota Utilities Co. is seeking proposals for 50–100 MW of capacity, energy, replacement energy, and ancillary services to serve its Sheridan, Wyoming system, with a desired start date of January 1, 2029, and a 3–20-year term.

Montana-Dakota Utilities Co.


General
Open
Dec 16, 2026 11:00 PM
Oct 30, 2026 12:00 PM
10 years
Request for Proposal (RFP)
Private
Ask AI about this solicitation
Contact
peter.thiessen@mdu.com
+17012227723
400 North 4th Street, Bismarck, ND, USA
Submission Instructions
Email
Description

Montana-Dakota Utilities Co. seeks proposals for capacity, energy, replacement energy, and ancillary services to supplement its 25% ownership interest in the Wygen III generating station and serve its Sheridan system load. Proposals may offer a power purchase agreement, an asset sale, or an asset sale option. The requested supply is 60 MW, with 50–100 MW considered; the desired start date is January 1, 2029, with later starts through 2031 considered; and the desired term is 10 years, with terms of 3–20 years considered. Proposals meeting the desired characteristics receive preference. Proposals must explain the supply resources, delivery arrangements, pricing, and associated costs, and address transmission arrangements outside the utility’s existing PacifiCorp transmission system. Required services include scheduling, firming, balancing, management of specified transmission arrangements, and required reserves and reserve sharing. For a power purchase agreement, the proposal should identify anticipated credit assurance; credit assurance in a form and amount acceptable to the utility is required before it enters into such an agreement.

Classification Codes
NAICS221118Other Electric Power Generation
PSC9105Electricity generation procured as a supply from a third-party generation supplier and energy attributes; where permitted by state and/or federal law or regulation, excludes ‘regulated utility services’.
Smart Codes
electric capacity supplyelectric energy supplyancillary power services
Specifications
Supply & Service
Timeline
Nov 18, 2026 11:00 PM-Notice of Intent to Bid Due
Dec 14, 2026 11:00 PM-Confidentiality Agreement Due
Dec 16, 2026 11:00 PM-Proposal Deadline
Jan 13, 2027-Short-List Notification
Feb 12, 2027-Selection Process Complete
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