Data Center Registry
Monarch Data Center
Yerington, Lyon County, Nevada
Monarch Data Center is a permitted data center in Yerington, Nevada (Lyon County), operated by Copia Power. The public record puts it at announced July 2025, 1 GW planned, 505 acres. It faces documented, organized local opposition.
Every line on this page traces to a public source listed at the bottom. Where a figure was looked for and not found, the row says so. A blank is never a zero.
Facility record
Permitted
- Operator
- Copia Power
- Facility type
- Data center, AI use likely
- Location
- Yerington, Lyon County, NV
- Coordinates
- 38.9855, -119.1630 (approximate)
- Power capacity
- 1 GW planned
- Land
- 505 acres
- Investment
- Not established from a public source
- Announced
- July 2025
- Utility
- NV Energy
- Power source
- On site gas
- On site generation
- 500 MW
- Cooling
- air
- Water use
- Not established from a public source
- Jobs
- Not established from a public source
- Public subsidy
- Not established from a public source
- Community reception
- Opposed
- Source confidence
- Confirmed by multiple independent sources or official documentation
Timeline from the record
Newest first. Record entries come from the filings and reports the registry cites. Coverage entries are headlines from publisher feeds we monitor daily, linked to the outlet; last checked September 14, 2026.
- August 6, 2026PermittedLyon County Board of Commissioners voted 3-1 to approve the planned unit development rezoning. Final PUD design approval, state permits (NDEP, State Engineer) and land purchase are still outstanding. Source: KOLO 8 News Now
Opposition and litigation at this site
Yes. Organized local opposition to Monarch Data Center in Yerington, Lyon County, Nevada is documented in the public record, without a lawsuit on file in the sources we track. Nearly 300 people attended the August 2026 commission meeting, a strong majority speaking in opposition.
How the community has taken it
Reception is a sourced signal, not an editorial judgment: opposed means documented, organized local opposition is the dominant signal on record.
Nearly 300 people attended the August 2026 commission meeting, a strong majority speaking in opposition. The Walker River Paiute and Yerington Paiute tribes passed formal resolutions opposing the project and stated they would pursue legal action over cultural resources and sacred sites.
Power and water
Copia Power would initially self-supply from an on-site 500 MW natural gas plant plus battery energy storage, phasing in NV Energy grid supply later. Project representatives cited NV Energy's resource plan commitment of 2,550 MW to data centers.
Air-cooled closed-loop design. Application materials estimate under 100 acre-feet annually; the county staff report cites under 800 acre-feet yearly. The Sierra Club and the Walker River Paiute and Yerington Paiute tribes object that the site would rely on groundwater in an over-appropriated basin.
Notes on the record
Roughly 505 acres in Mason Valley near Yerington; a 4.6 million-square-foot campus with north and south sub-campuses, a battery energy storage system, a natural gas plant, a substation and power lines across two parcels. First phase would provide 150 MW of the 1,000 MW total. Copia Power has one year to file its final PUD. Lyon County is drafting a stricter data center ordinance that will not apply retroactively to Monarch.
What the record does not establish, and the document that would
In every fight on our tracker the decisive fact came out of a public records request. These are the requests for this site.
- Tax abatements or other public subsidy
- Permanent jobs promised
Which document closes each gap
- Tax abatements or other public subsidy
- The abatement, PILOT, or development agreement approved by the county, city, or development authority, and the state's data center sales tax exemption certificate if one was issued.
- Permanent jobs promised
- The economic development application or incentive agreement, which usually states a job commitment and a clawback.
Have one of these documents? Send it to us and we will add it to the record with attribution.
Other sites within 30 miles
Distances are between recorded coordinates, many of which are a city or county centroid, so treat them as approximate. Cumulative load on one utility and one aquifer is the question a planning commission rarely asks.
- Microsoft Silver Springs Data Center Campus · Silver Springs · Microsoft27 mi · Proposed · Contested
- Tract Silver Springs Data Center Park · Silver Springs · Tract29 mi · Proposed · 1.6 GW · Supported
Questions people ask about this site
Is there opposition to the Monarch Data Center in Yerington?
Yes. Organized local opposition to Monarch Data Center in Yerington, Lyon County, Nevada is documented in the public record, without a lawsuit on file in the sources we track. Nearly 300 people attended the August 2026 commission meeting, a strong majority speaking in opposition.
Has anyone filed a lawsuit over the Monarch Data Center?
No lawsuit over Monarch Data Center appears in the record we track as of September 11, 2026. Residents most often reach a lawyer over water supply, well drawdown, noise from cooling plant, property value, or a rezoning approved without the notice the ordinance required. If any of that is happening near this site, it is worth a review whether or not a case has been filed yet.
How much water does Monarch Data Center use?
No water withdrawal figure for Monarch Data Center is on record here. Cooling is recorded as air, which is the strongest available clue: closed loop and air cooled plant draw far less than evaporative cooling. We leave the number blank rather than estimate one.
Who operates Monarch Data Center, and how big is it?
Copia Power is the operator on record. Capacity on record is 1 GW. The site is recorded at 505 acres.
How to cite this page
SueDataCenters.org Data Center Registry, "Monarch Data Center," updated September 11, 2026, https://suedatacenters.org/data-centers/monarch-data-center-yerington-nv.
Facility data from Compute Atlas (E. Kubiak), version 1.32.0 (September 7, 2026), licensed CC BY 4.0, record https://www.compute-atlas.com/facilities/monarch-data-center-yerington-nv, retrieved September 14, 2026.
Corrections with a public source are welcome at the Compute Atlas record or through our contact page. The whole registry is available as CSV and JSON under CC BY 4.0.
Sources for this record
As compiled and cited by Compute Atlas, with our own reporting appended. Archived links are used where the original has moved.
- 1.Lyon County Commissioners approve Monarch Data Center · KOLO 8 News Now · retrieved August 29, 2026
- 2.Massive data center in Lyon County is one step closer to being built · Carson Now / The Nevada Independent · retrieved August 29, 2026
- 3.Lyon County Commissioners approve rezoning for Monarch Data Center · NVBEX · retrieved August 29, 2026
- 4.Massive data center in Lyon County is one step closer to being built - 1,000 MW, 4.6 million sq ft, 505 acres in Mason Valley; water estimates disputed · Carson Now / The Nevada Independent · retrieved September 11, 2026
- 5.Lyon County Presses Ahead with Power Improvement District - Monarch described as eight two-story buildings plus an electrical substation · NVBEX · retrieved September 11, 2026
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