CyrusOne Lemoore (Ameresco, NAS Lemoore)

Power

Power and the grid

Sources on record, size not disclosed

On-site microgrid (solar, engine generators, batteries) Planned, agreements pending
reported at up to 425 MW of solar for a microgrid that also serves the air station; the share for the data center is not stated News report · Sept. 2025

Permits

Permits checklist

1 pending · 1 granted · 1 checked, nothing on file

Approvals a campus like this normally needs, and what we found.

◷
Land lease and development agreements Pending
U.S. Navy and Ameresco · Sept. 9, 2025: still being finalized at announcement; no executed lease or power agreement on record Company · Sept. 2025
✓
Federal environmental review (final supplemental assessment) Granted
U.S. Navy · Aug. 6, 2024: the Navy chose its preferred alternative; federal land, so no local land-use approval is on record State agency · Aug. 2024
–
Checked, nothing on file: Utility interconnection

Risks

What could slow it down

High
Agreements not final
Ameresco said the land and development agreements were still being finalized in Sept. 2025, and none has been published since. Company · Sept. 2025
Medium
Off-grid power must be built from scratch
The data center depends on a new microgrid of solar, engine generators and batteries that also serves the air station; no capacity figure is tied to the data center itself. News report · Sept. 2025
Watch
Capacity basis unclear
The 100 MW figure comes from the announcement and is not split into IT and utility load. Company · Sept. 2025

Timeline

What happened, and what is due

SitePaper trailConstructionPowerPermitsMoneyLegalUpcoming

2016
Site About 930 acres at the air station are leased to a private partner for a 125 MW solar project State agency · Aug. 2024
Aug. 6, 2024
Permits The Navy selects its preferred alternative in a final environmental assessment, allowing added energy systems on the leased site State agency · Aug. 2024
Sept. 9, 2025
Site Ameresco, the Navy and CyrusOne announce plans for a 100 MW AI-optimized data center with on-site generation Company · Sept. 2025
Sept. 9, 2025
Permits Ameresco says the agreements for the development are still being finalized Company · Sept. 2025
2027
Construction First portion of the project expected online (press) Company · Sept. 2025

The buildings

Specs

600,000 sq ft data center size reported by the press, in five phases per a tracker. News report · Sept. 2025

Who is involved

Owners, partners and builders

Developers

Ameresco: lessee of the Navy land and builder of the on-site energy facility
CyrusOne: to deliver the data center infrastructure (press)

Decision-makers

U.S. Navy (NAS Lemoore): landowner and lead agency for environmental review

Still unknown

Open questions

Executed Navy lease and development agreements.
Share of the microgrid serving the data center.
A named customer.

Where this comes from

53 records from 6 documents

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

Company 2News report 2State agency 1Dataset 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 (16)

Site location: Inside Naval Air Station Lemoore, CA, on the 930-acre Enhanced Use Lease Project Site leased by Ameresco from the Department of Defense
“Under the 2024 Proposed Action, the existing lease would be modified to allow the lessee to construct and operate additional resilient energy systems within the leased 930-acre Project Site.”
State agency · Aug. 2024 · grade A
Stated campus size: 100 MW
“today announced plans - alongside the U.S. Navy and CyrusOne - to develop a 100 MW AI-optimized data center and critical energy infrastructure at Naval Air Station (NAS) Lemoore.”
Company · Sept. 2025 · grade B
Power strategy: Co-located dedicated on-site generation microgrid (engine generators, control systems, infrastructure upgrades) built by Ameresco; off-grid by design, also enhancing energy resilience for NAS Lemoore
“NAS Lemoore will also benefit from a new microgrid, including engine generators, control systems, and infrastructure upgrades to enhance energy resilience across the installation.”
Company · Sept. 2025 · grade B
Project partners: Ameresco, Inc. (energy infrastructure and lessee); CyrusOne (data center developer/operator); U.S. Navy (landowner and host installation)
“today announced plans—alongside the U.S. Navy and CyrusOne—to develop a 100 MW AI-optimized data center and critical energy infrastructure at Naval Air Station (NAS) Lemoore”
Company · Sept. 2025 · grade B
Queue MW 100 verified against the primary company announcement: 100 MW campus-stated (Ameresco, Sep 9 2025); the release does not split the figure into IT vs utility basis
“today announced plans - alongside the U.S. Navy and CyrusOne - to develop a 100 MW AI-optimized data center”
Company · Sept. 2025 · grade B
Ameresco, the Navy and CyrusOne announced the 100 MW AI-optimized data center and energy infrastructure on Sep 9, 2025; agreements were still being finalized at announcement
“While the agreements for this development are being finalized, Ameresco expects this to be one of its largest energy assets.”
Company · Sept. 2025 · grade B
Facility engineered for sensitive federal workloads: FedRAMP, FISMA High, and DoD Impact Levels 5 and 6, with air-gapped architectures for the most sensitive workloads.
“The facility will be engineered to meet stringent federal security and compliance standards, including FedRAMP, FISMA High, and DoD Impact Levels 5 and 6”
Company · Sept. 2025 · grade B
On-site generation context (not campus MW): the SEA authorizes up to 425 MW of solar PV on the lease parcel; Hanford Sentinel reporting via DCD described a 425 MW solar farm supplying a 600,000 sq ft data center and offe
“Ameresco will then construct a 425MW solar farm, which will supply power to a 600,000 sq ft data center on the site.”
News report · Oct. 2026 · grade C
First segment of the project expected to come online in 2027 on land leased by Ameresco from the Department of Defense (DCD summary of the partnership announcement)
“The first segment of the project is expected to come online in 2027 on land leased by Ameresco from the Department of Defense.”
News report · Oct. 2026 · grade C
The Navy SEA authorizes up to 425 MW of solar PV on the lease site, but the September 2025 Ameresco/Navy/CyrusOne announcement foregrounds an engine-generator microgrid and mentions no solar array - solar scope in the an
“According to reports, Ameresco was planning to construct a 425MW solar farm, which would have supplied power to an on-site data center. No news of a solar array was mentioned in the release”
News report · Sept. 2025 · grade C
County code: 06031
“The Naval Air Station Lemoore is located on the border of Kings County and Fresno County in California.”
News report · Sept. 2025 · grade C
County code: 06019
“The Naval Air Station Lemoore is located on the border of Kings County and Fresno County in California.”
News report · Sept. 2025 · grade C
Power is behind-the-meter and off-grid by design (DCD's headline calls it an 'offgrid AI data center'): a dedicated on-site energy facility forms a microgrid - solar farm as primary source (per the original Hanford Senti
“The AI-optimized data center will be colocated with a dedicated on-site energy generation facility built by Ameresco, forming a microgrid system that includes engine generators, control systems, and infrastructure upgrades”
News report · Sept. 2025 · grade C
Off-grid design: data center colocated with a dedicated Ameresco-built on-site generation facility forming a microgrid; first segment expected online in 2027, ~600,000 sq ft in five phases per tracker
“The AI-optimized data center will be colocated with a dedicated on-site energy generation facility built by Ameresco, forming a microgrid system that includes engine generators, control systems, and infrastructure upgrades.”
News report · Sept. 2025 · grade C
Facility engineered for federal workloads: FedRAMP, FISMA High and DoD Impact Levels 5 and 6, with air-gapped architecture for the most sensitive workloads
“According to the partners, the facility will be engineered to meet stringent federal security and compliance standards, including FedRAMP, FISMA High, and DoD Impact Levels 5 and 6”
News report · Sept. 2025 · grade C
Early reporting described an approximately 600,000 sq ft data center built in five phases of 20-25 MW, suggesting total IT capacity north of 100 MW. Phase figures are recorded as reported only and were NOT summed into an
“the report says it could open next year, and be constructed in five phases of 20-25MW, suggesting a total IT capacity north of 100MW”
News report · Oct. 2024 · grade C

Money and contracts (8)

Navy Enhanced Use Lease (existing, 2016; transferred 2019) - 930-acre lease, up to 125 MW solar PV authorized: land lease Navy Enhanced Use Lease - existing lease (2016; transferred to current lessee 2019): Lease of appr
“The existing lease allows the lessee to construct and operate up to a 125 MW solar PV system and associated infrastructure.”
State agency · Aug. 2024 · grade A
Navy EUL lease modification (2024 Proposed Action / FONSI) - additional 300 MW solar PV (425 MW total) + data center: lease modification Navy EUL lease modification - 2024 Proposed Action: FONSI (Aug 2024) selected modif
“the existing lease would be modified to allow the lessee to construct and operate additional resilient energy systems within the leased 930-acre Project Site”
State agency · Aug. 2024 · grade A
Enhanced Use Lease (existing energy lease): land lease
“The existing lease allows the lessee to construct and operate up to a 125 MW solar PV system and associated infrastructure.”
State agency · Aug. 2024 · grade A
Enhanced Use Lease modification (2024 Proposed Action): lease modification
“the changes proposed as part of the 2024 Proposed Action would include the construction and operation of an additional 300 MW of solar PV systems (for a total of up to 425 MW)”
State agency · Aug. 2024 · grade A
Project status: announced only (agreements still being finalized at the Sep 2025 announcement; no construction start found through Oct 2026)
“While the agreements for this development are being finalized, Ameresco expects this to be one of its largest energy assets.”
Company · Sept. 2025 · grade B
Ameresco / U.S. Navy / CyrusOne development agreements - status (being finalized at Sep 9, 2025 announcement): development agreement status Ameresco / U.S. Navy / CyrusOne development agreements: Agreements for the 100 M
“The first portion of the project is expected to come online in 2027 and will be constructed on land leased by Ameresco from the Department of Defense.”
Company · Sept. 2025 · grade B
Development partnership + enhanced use lease (in finalization) - 100 MW AI-optimized data center, NAS Lemoore: development partnership + enhanced use lease (in finalization) Announced Sep 9, 2025 (Business Wire): the par
“today announced plans—alongside the U.S. Navy and CyrusOne—to develop a 100 MW AI-optimized data center and critical energy infrastructure at Naval Air Station (NAS) Lemoore”
Company · Sept. 2025 · grade B
development agreements (in finalization): development agreement status
“While the agreements for this development are being finalized, Ameresco expects this to be one of its largest energy assets.”
Company · Sept. 2025 · grade B

Permits and government (4)

NEPA Supplemental Environmental Assessment with Finding of No Significant Impact: FONSI issued; 2024 Proposed Action (Preferred Alternative) selected
“an option to construct a data center, EV charging stations, BESS, backup generation/microgrid, and related infrastructure”
State agency · Aug. 2024 · grade A
The 100 MW AI data center at Naval Air Station Lemoore will be co-located with d: off-grid microgrid structure: no CAISO queue entry and no CPUC-jurisdictional service (framework finding)
“today announced plans—alongside the U.S. Navy and CyrusOne—to develop a 100 MW AI-optimized data center and critical energy infrastructure at Naval Air Station (NAS) Lemoore”
Company · Sept. 2025 · grade B
Ameresco's announcement states the development agreements were still being final: land/energy agreements still being finalized at announcement (status check)
“While the agreements for this development are being finalized, Ameresco expects this to be one of its largest energy assets.”
Company · Sept. 2025 · grade B
local land-use / CEQA record: none exists - project sits on federal Navy land under a DoD lease; no city or county approval or CEQA record
“will be constructed on land leased by Ameresco from the Department of Defense”
Company · Sept. 2025 · grade B

Site and other (3)

Site development status: Project Site undeveloped and vacant under Ameresco's existing lease as of August 2024 (Navy SEA)
“While Ameresco holds the current lease, aside from general required property maintenance, the Project Site has remained undeveloped and vacant.”
State agency · Aug. 2024 · grade A
The campus sits on federal NAS Lemoore land under a Navy lease, so environmental review was federal NEPA, not CEQA: the Navy was lead agency for the Final SEA/FONSI (Aug 2024) covering Kings and Fresno Counties; no City
“Affected Region: Kings and Fresno Counties, California Lead Agency: U.S. Department of the Navy”
State agency · Aug. 2024 · grade A
Expected first online: 2027 (first portion)
“The first portion of the project is expected to come online in 2027 and will be constructed on land leased by Ameresco from the Department of Defense.”
Company · Sept. 2025 · grade B