Proposed Conditional use permit approved unanimously by county commissioners, June 2026
Prometheus Hyperscale Evanston Campus
Evanston, Uinta County · Operator: Prometheus Hyperscale
1250 MW
A 506 acre campus on ranchland in southwest Wyoming that would start at 1.25 gigawatts with potential to expand to 5 gigawatts, phased over four to five years. The developer plans to generate its own power by running pipeline natural gas through fuel cells, and the permit carries 15 conditions including responsibility for maintaining two county roads.
Issues raised: power, water, zoning, jobs, transmission
Source: KPCW, 2026-06-19 · On the map
Proposed 1 MW first phase near completion; up to $66 billion expansion disclosed to county October 2026
Aethel Energy Lost Cabin Data Center Campus
Lost Cabin, Fremont · Operator: Aethel Energy
500 MW · $66 billion · announced 2026-10-08
Aethel Energy is finishing a 1 megawatt first phase near Lost Cabin and told Fremont County commissioners the site could grow into a multi phase campus running on about 500 megawatts of on site natural gas generation. Fremont County has no zoning code, so review would fall to Wyoming state agencies.
Issues raised: power, air-pollution, zoning, opposition
Source: Cowboy State Daily, 2026-10-08 · On the map
Proposed annexed and rezoned to business park on third reading September 28, 2026
Cox Ranch Data Center Site
Cheyenne, Laramie County · Operator: SkyBox Data Centers and ViaWest Group
announced 2026-09-28
Cheyenne annexed 1,260 acres west of Roundtop Road and rezoned the land from agricultural to business park to allow SkyBox Data Centers and ViaWest Group to pursue a data center campus. A site plan and utility service agreement are still required.
Issues raised: water, noise, opposition, transmission
Source: Cowboy State Daily, 2026-09-29 · On the map
Proposed Annexation and rezoning advanced on second reading October 1, 2026, final vote scheduled October 12
Orchard Hills Data Center
Cheyenne, Laramie · Operator: Trammell Crow Company
announced 2026-10-01
The Cheyenne City Council voted on October 1 to advance annexation and light industrial rezoning of 162 acres west of South Greeley Highway for a Trammell Crow Company data center next to an existing Meta campus. Only two council members voted against the proposal, and the vote overrode a unanimous planning commission denial.
Issues raised: zoning, opposition, character
Source: Wyoming Tribune Eagle, 2026-10-01 · On the map
Under construction Approved by county commissioners January 2026, first buildings targeted 2027
Project Jade and Cheyenne Power Hub
Cheyenne, Laramie County · Operator: Tallgrass Energy, originally with Crusoe
1800 MW · announced 2025-06
A data center campus south of Cheyenne paired with a dedicated gas fired power plant, approved by Laramie County commissioners in January 2026. Its projected load would exceed current statewide electricity use, which has made grid impact, residential rates and water supply the central local questions.
Issues raised: power, water, transmission, zoning, opposition
Source: Data Center Dynamics, 2026-01 · On the map