- March 8, 1917 - Gov. Simon Bamberger signs the Public Utilities Act, which authorizes the Public Utilities Commission of Utah.
- April 3, 1917 - The commission is formally organized with three commissioners, a stenographer, a reporter and a special investigator.- 1935 - Legislation changes name to Utah Public Service Commission.
- 1941 - Legislature creates Department of Business Regulation. Three-member Commission of Business Regulation also serves as the Public Service Commission.
- 1969 - The Public Service Commission becomes an independent agency when Legislature reorganizes administrative powers in Department of Business Regulation, replacing the commission with an executive director.
- 1977 - Utah Division of Public Utilities appeals a commission decision to the Utah Supreme Court. Action formally establishes separation envisioned by 1969 reorganization.
- 1977 - Legislature establishes the Utah Committee of Consumer Services headed by five citizen appointees. The committee serves as an advocate for residential, small commercial and agricultural consumers in utility cases before the commission.
- 1983 - Legislature reorganizes utility regulation by making the commission independent from all other state agencies and authorizing a small technical support staff. The Division of Public Utilities receives formal authority to act independently as an adversary party in utility regulation cases.
- 1990 - Legislature clarifies commission's authority to consider alternative utility regulation plans.