Monarch Data Center Campus
Copia Power. Approved. 1000 MW.
Copia Power's Monarch Data Center would be a 4.6 million square foot, 1,000 megawatt campus on about 505 acres at 150 and 155 Penrose Lane in Mason Valley near Yerington, paired with a 500 megawatt natural gas backup plant and battery storage, and requiring an estimated 800 acre-feet of water a year. Lyon County commissioners approved the needed zoning change 3-1 on August 6, 2026, even as neighboring Reno, Nye County and Humboldt County have all passed data center moratoriums. Copia still needs final design approval and additional permits before construction, and Lyon County is separately developing a countywide data center ordinance.
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- Status
- Approved
- Operator
- Not disclosed
- Applicant on record
- Copia Power
- Location
- 150 and 155 Penrose Lane, Mason Valley, near Yerington, NV, Lyon County, NV (approximate, city center)
- Size
- 1000 MW, 505 acres, 4,600,000 sq ft
- Cooling
- Not reported
- Utility
- NV Energy
- First reported
- 2025-07
- Last updated
- August 19, 2026
What happens next
Still to come: permits and construction. Builders do not always announce a construction start date in advance.
Sources
- A massive data center in rural Nevada is one step closer to being built, The Nevada Independent, 2026-08-09
- Lyon County Commissioners Approve Rezoning for Monarch Data Center, NVBEX, 2026-08-12
- Lyon County developing data center ordinance, Nevada Appeal, 2026-08-06
What it would mean nearby
The cooling design has not been reported. If it uses evaporative cooling, a 1000 MW facility would draw roughly 3.2 million to 11.4 million gallons of water a day, about what 36,500 households use.
2026 fuel cost filings is pending; NV Energy says it would take about $4 to $6 off a typical monthly bill. Nothing here changes a bill today. What matters is whether the large load contract survives intact; if it is weakened, the cost of plants built for data centers starts showing up in the next general rate cases around 2027 and 2028. Sierra Pacific 2024 general rate case (docket 24-02026) adds about $2.00 a month to a typical bill from October 2024.
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Common questions
Where is the Monarch data center?
It is in Yerington, Lyon County, NV.
Has the Monarch data center been approved?
Yes, it has been approved.
How big is the Monarch data center?
Reported size: 1000 MW, 505 acres, 4,600,000 square feet.
Is it near you?
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