Data center profile · Tonopah / Harquahala, Maricopa County, Arizona

Copia Power Belmont / Harquahala data center campuses

Data center campus proposed by Copia Power in Maricopa County, Arizona, on grid power with an on-site gas bridge.

Land assembled. Zoning approval and utility and grid approval pending. A utility or grid-operator filing is on record, with no final approval or signed service agreement yet. Newest record Sept. 2026.
The campus, Lower-resolution satellite image, Oct. 13, 2026
1,250 MW
on-site generation on record
prime or bridge power, not backup
Arizona Public Service
serving utility
Grid plus on-site gas bridge
3,100
acres in the site
OperatorCopia Power
CustomerNone named
First building in serviceOur estimate: 2029 or later (no dated power path yet).
The site

The site from above

Satellite overview
Lower-resolution satellite image, Oct. 13, 2026.
Power

Power and the grid

The plan on record is the grid, with on-site gas as a bridge. An interconnection study is under way.

We checked utility filings, regulator dockets and air-permit records for this campus.

Permits

Permits checklist

2 pending · 4 checked, nothing on file

Approvals a campus like this normally needs (including an air permit for backup or on-site generators), and what we found.

Money

Money on record

$1.7B Construction financing (Construction loan). News report · Sept. 2026

Timeline

What happened, and what is due

SitePaper trailConstructionPowerPermitsMoneyLegalUpcoming
  1. April 2026
    Permits In April, Copia received rezoning approvals to expand the initial Harquahala phase by 700 acres while allowing for data center uses. News report · Sept. 2026
  2. Sept. 2026
    Permits Rezoning under review by Maricopa County Planning and Development. News report · Sept. 2026
Construction activity

Since Oct. 2026: 1 satellite capture. Satellite · Oct. 2026

Who is involved

Owners, partners and builders

Owners and developers
  • Copia Power, developer
Power and utilities
  • EQT
Investors and lenders
  • The Carlyle Group, partner
Still unknown

Open questions

Where this comes from

23 records from 5 documents

Drawn from news reports, public and commercial datasets, satellite captures and company statements, each kept with its date and source. The bar shows documents by type.

News report 2Dataset 1Satellite 1Company 1
Evidence

Every quote behind this page

Grade key: A = the primary record itself (permit, filing, exhibit) · B = a dated official statement · C = news reporting. Map distances are our own measurements on OpenStreetMap and carry no grade. Allegations in lawsuits are marked as such in the quotes.

Power (10)
  • transmission upgrade (ACC CEC): applied - public hearings held Sept. 29, 2025/30
    “Copia Power has submitted an application for a Certificate of Environmental Compatibility for a transmission line in Maricopa County to interconnect new generation, load, and increase resiliency”
    Company · Oct. 2026 · grade B
  • On-site generation: 1,250 MW
    “(P) Planned for installation, but regulatory approvals not initiated”
    Dataset · Aug. 2026 · grade B
  • Role of the on-site plant: prime
    “Saddleback Generation Station; Copia Power; Maricopa County; Natural Gas Fired Combined Cycle”
    Dataset · Aug. 2026 · grade B
  • On-site power technology: natural gas combined cycle
    “Natural Gas Fired Combined Cycle”
    Dataset · Aug. 2026 · grade B
  • Campus name: Copia Power Belmont Energy Center / Harquahala campus
    “is working to rezone about 3,100 acres near Tonopah in the far West Valley for its latest project, the Belmont Energy Center”
    News report · Sept. 2026 · grade C
  • Site acreage: 3100 acres
    “Most of the project site - about 2,860 acres - would be for utility-scale solar energy generation, while about 320 acres would be used for a gas generation facility, BESS and data centers”
    News report · Sept. 2026 · grade C
  • Announced: Sept. 2, 2026
    “Copia Power, which develops, builds and operates grid-connected power and data center infrastructure, is working to rezone about 3,100 acres near Tonopah”
    News report · Sept. 2026 · grade C
  • Inside the wider planned campus, Copia has completed its flagship Harquahala Sun project (450 MW solar + 1,200 MWh storage, $1.2B) and is building the Maricopa Energy Center (550 MW solar + 2,200 MWh). This generation co
    “Copia just completed its flagship project within the larger planned campus - a $1.2 billion, 450-megawatt solar farm with 1,200 megawatt hours of battery storage”
    News report · Sept. 2026 · grade C
  • Project status: Entitlement stage: the Belmont Energy Center rezoning (about 3,100 acres) is early in the Maricopa County process with no planning-and-zoning hearing yet scheduled; the 917-acre Harquahala campus's plan a
    “The Maricopa County Board of Supervisors of Arizona will consider Dec. 10 two land use requests tied to Copia Power's proposed 917-acre data center campus”
    News report · Dec. 2025 · grade C
  • Utility: Arizona Public Service (APS)
    “an expansion of the nearby and under-construction Maricopa Energy Center (MEC), a 550 MW solar and 2,200 MWh battery storage facility, supported by 20-year PPAs with Arizona Public Service”
    News report · Dec. 2025 · grade C
Money and contracts (2)
  • construction financing (construction loan): construction loan 1700000000 USD
    “The project is backed by a $1.7 billion construction loan and has a power purchase agreement with APS”
    News report · Sept. 2026 · grade C
  • power purchase agreements (20-year): PPA term 20 years
    “a 550 MW solar and 2,200 MWh battery storage facility, supported by 20-year PPAs with Arizona Public Service”
    News report · Dec. 2025 · grade C
Permits and government (4)
  • County code: 04013
    “according to planning documents filed with Maricopa County”
    News report · Sept. 2026 · grade C
  • rezoning: applied - early entitlement; planning and zoning commission hearing not yet scheduled
    “Its latest 3,100-acre Belmont Energy Center project is early in the entitlement process. A planning and zoning commission hearing hasn't been scheduled yet”
    News report · Sept. 2026 · grade C
  • In April (2026, per the September 2026 report), Copia received rezoning approvals to expand the initial Harquahala phase by 700 acres while allowing for data center uses - the entitlement under which the data-center comp
    “In April it received rezoning approvals to expand that initial phase by 700 acres while allowing for data center uses”
    News report · Sept. 2026 · grade C
  • rezoning: Planning Commission recommended approval Nov. 6, 2025; Board of Supervisors consideration scheduled Dec. 10, 2025 (outcome not in sources retrieved)
    “The Planning Commission recommended the land use requests for approval Nov. 6”
    News report · Dec. 2025 · grade C

Imagery and records: Satellite imagery: Sentinel-2 (ESA Copernicus).