Is a Data Center Coming

Lyon County, NV

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.

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

Sources

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.

For a noise estimate and the three distance rings, check your own address.

Is it near you?

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