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USA › Nevada › Lyon County › Unincorporated Lyon County

No project in Unincorporated Lyon County, but 2 nearby

Who decides here: the Lyon County Commission decides on zoning for land outside city and town limits.

Nearby (within 15 miles)

Approved, not built yetabout 1 miles away

Tract Silver Springs data center park

Lyon County

1,060 acres

🕒 Sept 17, 2025: Tract bought about 1,060 acres after Lyon County approved rezoning and a development agr…

Reported in the news, not confirmed yet

Approved, not built yetabout 1 miles away

Monarch Data Center campus (Mason Valley)

Lyon County

505 acres

🕒 Aug 6, 2026: County commissioners approved the tentative rezoning 3-1 (one abstained).

Local votes and rules

🗺️ Zoning change · Lyon County

Lyon County commissioners voted 3-1 (one commissioner stepped aside) to approve the planned unit development rezoning for the Monarch Data Center and its gas power plant near Yerington. Copia Power has one year to file the final plan and still needs state permits. The Walker River Paiute and Yerington Paiute tribes said they would fight the decision in court.

Aug 6, 2026Source

📜 Data center rules · Lyon County

Lyon County commissioners reviewed a first draft data center ordinance at a workshop and voted 5-0 to send it back to staff. Several said the 150-foot buffer from homes was far too small. The draft would ban water-using cooling (except treated wastewater), require a permit in industrial zones, and set noise limits. It would not apply to Monarch.

Aug 3, 2026Source

✅ Approved · Lyon County

Lyon County's Planning Commission voted 4-3 to send the 1-gigawatt Monarch Data Center rezoning on to the County Commission.

July 14, 2026Source

🗺️ Zoning change · Lyon County

Lyon County commissioners voted 4-1 to change the master plan for the Monarch Data Center site in Mason Valley from farmland (Agriculture) to Specific Plan. This did not approve building anything; a rezoning was still needed.

Dec 4, 2025Source
Built & runningBeing builtApproved, not built yetProposedStopped or cancelledHollow dot (when zoomed in): exact site not known yet, pin shows the town

What you can do

  1. Get told first.
    We'll email you if anything changes in Unincorporated Lyon County.
  2. Go to county meetings.
    Anyone can speak. Big projects usually need a public hearing.
  3. Ask questions in writing.
    Use our checklist.
📣 Report something here

🔔 Get told first

We'll email you when something changes in Unincorporated Lyon County. Nothing else.

⚡ Your electric company

Sierra Pacific Power Co. (company).

Big data centers need a lot of power. Who pays for new power lines depends on state rules. See the rules in Nevada.