Las Vegas - North data center | Ask the Grid

Identity and campus: Las Vegas - North data center
Also reported as Lone Mountain Data Center, Flexential - Las Vegas/North (LAS04).
Grid record: Nevada Power Company (NV Energy). · 15 kV
Clark County DAQ Source ID 17272 — stationary-source air permit identifier, not an electric-grid docket.
Regulatory record: Clark County DAQ stationary-source permit Source ID 17272: the existing synthetic-minor permit was issued April 25, 2023, and expires April 24, 2028. A significant-revision application received November 19, 2025, was the subject of a public-participation notice posted March 23, 2026. The applicant requested generator limits of 304 operating hours per year, down from 500, and a B03 cooling-tower TDS limit of 2,500 ppm, up from 1,500 ppm. The public notice records a preliminary determination that the application should be approved; a final decision is not established here. · North Las Vegas construction permit for work at 3330 E. Lone Mountain Road: a local report stated ViaWest received a permit for approximately $7.2 million of building work in connection with its Lone Mountain expansion, with completion anticipated in March 2017. ViaWest later reported completing a 32,000-square-foot raised-floor expansion.
Clark County Division of Air Quality Source ID 17272 is a synthetic minor source permit for the Flexential Lone Mountain Data Center. The existing permit was issued April 25, 2023, and expires April 24, 2028. DAQ received an application on November 19, 2025, for a significant revision and posted a public-participation notice on March 23, 2026. The application requested reducing the annual emergency-generator operating limit from 500 to 304 hours and increasing the permitted total-dissolved-solids limit for cooling tower B03 from 1,500 to 2,500 ppm. The public notice states the Control Officer preliminarily determined the application should be approved; the materials reviewed do not establish a final disposition. A separate 2017 construction permit for work at 3330 E. Lone Mountain Road was reported at approximately $7.2 million; that is an expansion permit value, not the total cost of the facility.
Availability tier: Phase-specific certifications: the original Lone Mountain facility was reported as Tier IV certified for its design; Uptime Institute lists Lone Mountain – Phase II as Tier III certified for both design documents and the constructed facility. The site should not be characterized as uniformly Tier IV.

Capacity	Basis	Status	Scope	As of
9 MW	Critical IT Load	Reported	Exact Asset	—
Flexential reports 9 MW of critical-load UPS capacity (also described as 9 MW critical power); this is not presented as utility service or interconnection capacity.
13 MW	Backup Generation	Approved	Exact Asset	Existing permit issued 2023-04-25; proposed revision published 2026-03-23 and marked TBD.
Four permitted emergency diesel gensets rated at 3,250 kW each; 13 MW is the sum of their listed nameplate ratings, not a statement of usable simultaneous output.
16 MW	Backup Generation	Reported	Exact Asset	2026-10-06
A facility profile separately reports 16 MW of redundant, fault-tolerant diesel generation capacity. This differs from the 13 MW sum of the four genset ratings listed in the permit; the figures are retained separately.

Capacity	Basis	Status	Scope	As of
9 MW	Critical IT Load	Reported	Exact Asset	—
Flexential reports 9 MW of critical-load UPS capacity (also described as 9 MW critical power); this is not presented as utility service or interconnection capacity.
13 MW	Backup Generation	Approved	Exact Asset	Existing permit issued 2023-04-25; proposed revision published 2026-03-23 and marked TBD.
Four permitted emergency diesel gensets rated at 3,250 kW each; 13 MW is the sum of their listed nameplate ratings, not a statement of usable simultaneous output.
16 MW	Backup Generation	Reported	Exact Asset	2026-10-06
A facility profile separately reports 16 MW of redundant, fault-tolerant diesel generation capacity. This differs from the 13 MW sum of the four genset ratings listed in the permit; the figures are retained separately.

Las Vegas - North data center

Overview

Power and grid

Facility and development

Organizations

Sources

Las Vegas - North data center

Overview

Power and grid

Facility and development

Organizations

Sources

Lone Mountain initial facility

2017 raised-floor expansion