What changed: The Wyoming Public Service Commission unanimously approved Cheyenne Light’s application for the 115 kV Bronco Substation at its June 11, 2026 open meeting, according to the meeting minutes. We found no separate written order posted. The commission also told the company to notify it before adding any more transformers to the substation.
Why it matters: The application puts the substation and associated transmission lines at about $39 million, to serve a new Microsoft data center campus near the Cheyenne Prairie Generating Station. It says Microsoft will pay the entire cost. It lists easements and environmental permits as done, a construction start in Q2 2026 and service in Q2 2027. We haven’t confirmed that construction has started, and these are the company’s targets.
Next step: investigate. Electrical and civil firms should find out who holds this substation work and what scope is left. A dated construction report or a named contractor would change the picture.
Sources: Wyoming PSC docket portal, read November 6, 2026; search by record number. Record 18087 (20003-266-EN-26): Application, March 13, pp. 4–8; June 11 minutes, item 4, p. 2.