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The Commission regulates four investor owned electric utilities that operate in Wyoming. In addition, the Commission also has regulatory authority over eighteen retail rural electric cooperatives that provide electric service within the state.

The PSC has the following primary duties regarding the regulation of electric utilities:

  • Hearing rate cases and approving rates and tariffs for the companies
  • Reviewing, analyzing and hearing electric utility applications to pass-on wholesale cost increases in the cost of electricity
  • Reviewing integrated resource plans for large electric utilities
  • Granting certificates of public convenience and necessity for large facilities, including power plants and some transmission lines
  • Establishing accounting and depreciation procedures for utilities
  • Approving mergers, acquisitions and transactions between companies
  • Approving the issuance of securities and creation of liens by the utility Mediating consumer complaints regarding electric service issues

Integrated Resource Plan (IRP) Filings

An Integrated Resource Plan (IRP) is a recurring planning process undertaken by a public utility to identify the preferred mix of supply and demand side resources that will meet projected customer demand, provide service reliability and resource diversity at the least possible cost.

Commission Rule Chapter 3, Section 33 - Integrated Resource Plan (IRP) pertains to Integrated Resource Planning. It states: "Each utility serving in Wyoming that files an IRP in another jurisdiction shall file that IRP with the Commission. The Commission may require any utility to file an IRP."

Electric Integrated Resource Plan (IRP) Guidelines

2016 Interest Rate Set

Pursuant to Sections 241(c) and 504(f)(iii) of the Wyoming Public Service Commission’s (Commission) Procedural Rules and Special Regulations, the Commission set the interest rate payable on customer deposits held by gas, electric, and water utilities and telecommunications companies in the state of Wyoming, in its open meeting held on October 22, 2015. The interest rate is set at 1.75% per annum for the period of January 1, 2016, through December 31, 2016.

The interest rate provided for in Rule Section 241 is also incorporated by reference in Rule Section 250, Electric, Gas, and Water Public Utility Commodity Balancing Account, as a basis for periodic pass- on filings, when a utility charges or collects interest on any over- or under-collected balance in an authorized Commodity Balancing Account.


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Electric Utilities
Registration Form

Contact / Address Update Form
Required Filings Cover Sheet

One Call Dig Safely