Google Columbus · Columbus, OH

Last change recorded — · Last checked 2026-10-05

OwnerGoogle

UsersGoogle DeepMind

IT power, end of 2026303 MW

Planned end state386 MW

First power2024-04-01

Build-out complete2027-07-01 (est.)

Power pathNo data yet

Binding stepNo data yet

First power vs announcedNo announced date on record

Full build-out vs announcedNo announced date on record

Utility / power partnersAEP Ohio (verify)

Recorded readiness — 0 of 5 applicable milestones have a dated public record

○ Land○ Permits○ Grid supply· Generation○ Water· Financing◐ Construction

Gate to first power — target 2024-04-01 (estimate) · path: unknown, generic steps assumed · each step must finish its lead time before the target

1 of 1 required steps have a public date. Red = recorded date past the rule-based deadline · grey "no public date" = required step without a record · green = on record in time · context steps never colour.

	Step	Must finish by	Others did it	Known date	Status	Basis
	Building ready for IT	2024-04-01 (0 mo before)	2 mo after (n=7)	2027-07-01 plan	plan 39 mo past the deadline	Build-out complete (Epoch estimate) · ◐

This site is energized; lights only show how its recorded steps compared with the lead times.

Lead-time assumptions

Site secured 15 months before first power — Land under control and campus announced. Rarely binding; shown for context.
Permits in hand 0 months before first power — Final air and siting permits. Operators often energize on standard or temporary authorisations and receive the major permit later; flagged only when the permit lands more than 6 months after first power or is missing for an on-site plant.
Grid supply agreed 9 months before first power — Interconnection or large-load agreement approved. Observed median 7 months before first power; the physical works (substation, lines) run in parallel with construction.
Substation and lines energized 2 months before first power — Utility delivery point live; final tests before the load is taken.
New generation online 1 months before first power — Utility plant or on-site plant generating; needed just before energization when the grid cannot carry the load alone.
Major equipment on site 6 months before first power — Turbines, transformers, switchgear delivered; installation and commissioning take the remaining months.
Construction started 24 months before first power — Groundbreaking of the building that gives first power. Observed 4-26 months for recent AI campuses; Meta's redesigned campuses took 35-58.
Building ready for IT 0 months before first power — First building ready for IT. 'Complete' or 'opened' is usually reported after first power; flagged only beyond 3 months.
Full build-out complete -12 months before first power — All announced buildings operational. Comes after first power by design; context only.
Water supply secured 12 months before first power — Water rights, municipal agreement or desalination contract in hand. Context only; one of the feasibility items.
Financing closed 12 months before first power — Project financing, anchor lease or committed capital announced. Context only; not applicable when the owner is a hyperscaler building on its balance sheet.

Dated steps (from the sources; later dates are plans)

2024-04-01 First powerFirst power (Epoch) · ◐

2027-07-01 plan Building ready for ITBuild-out complete (Epoch estimate) · ◐

Build-out timeline (Epoch AI; dated status notes with IT power; rows after today are estimates)

2021-10-01—Land clearing begins on the eastern half of the site, for Buildings 1-2

2023-07-01—Building 2 foundation work begins. Building 1 generators seem complete, cooling towers still under construction.

2024-04-0165 MWBuilding 1 operational. No visible construction and roads/parking complete around the building. Building 2 chillers are beginning construction. Foundation work begins for Building 3.

2025-03-01130 MWBuilding 2 operational. Parking complete, no more visible construction.

2025-10-01216 MWBuilding 3 operational. Surrounding roads finished, no more visible construction.

2026-02-21216 MWBuildings 1-3 are visibly operational, with steam coming out of the cooling towers. Meanwhile Building 4 is extremely close to completion, with all backup generators complete with only 3 cooling towers missing their fans

2026-05-01303 MWBuilding 4 operational. No more visible construction, and since only 3 fans needed to be installed since Feburary, operational date was likely soon after. Building 5 roof almost complete.

2026-08-05303 MWConfirmation that Building 4 is complete. Building 5 has progressed since February, with a complete roof, all backup generators in place, and five cooling towers in place.

2027-07-01 est.386 MWBuilding 5 operational. The [transmission line construction notice](https://www.aeptransmission.com/ohio/docs/Hartman%20Farms%20Extension%20No.%202%20138%20kV%20Transmission%20Line%20Project%20Construction%20Notice.pdf)

Recorded fact building ready for it has a recorded date later than the rule-based deadline for a 2024-04-01 first power.

Calculated requirement Energized; watch the build-out timeline for the next buildings.

Sources (Epoch AI selection): DCD article detailing early work beginning on the site · Transmission line construction notice; details current site capacity, expansion, and maximum future site capacity

Epoch AI, 'AI data centers', epoch.ai/data/ai-data-centers (CC BY 4.0); coordinates from GeoNames cities500 (CC BY 4.0) and hand-entered places; overrides in tools/project_overrides.csv with their own sources. Campuses outside the Epoch dataset come from tools/campuses.csv (public reporting, source per row). Data retrieved 2026-10-05. Report a correction to contact@ailoadmap.com (campus id google-columbus; include the row and a source link).