Amazon · Ridgeland, Mississippi

Amazon Ridgeland

273MW

The power of 220,000 US homes.

Drawing power since May 2026. Projected to reach 1.0 GW by Sep 2028.

Capital cost
$8.6B
Chips
Trainium2, Trainium3
Users
Anthropic (unconfirmed)
Project
Project Rainier
Energy
Entergy
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Amazon Ridgeland on a globe of the world's largest AI data centers.

Power over time

facility power · 5 milestones
Every milestone
  1. 24 Feb 2024 — Land clearing begins
  2. 4 Oct 2025 — Roof complete on Buildings 3
  3. 15 May 2026 273 MW Buildings 1-4 are operational, based on the buildings shells and backup generators and most of the landscaping looking complete. Building 5 roof is complete but still lacks cooling equipment.
  4. 9 Feb 2027 · projected 341 MW Building 5 is operational (estimate).
  5. 29 Sep 2028 · projected 1.0 GW Buildings 6-14 are operational (estimate). Buildings 1-4 took an estimated 2.25 years on this site. We assume Buildings 6-14 get underway by July 2026, and take the same time as Buildings 1-4. This is later than the expected completion by 2027.

Every step Epoch planned here on 2 Sep 2026 is still on plan. Planned against reached

Gas made 37% of the power on this site's grid

net generation by fuel · Oct 2025 to Sep 2026

Midcontinent Independent Transmission System Operator, Inc. MISO · balancing authority

  1. Gas 37%
  2. Coal 26%
  3. Nuclear 14%
  4. Wind 15%
  5. Solar 6%
  6. Hydro 1%
  7. Other 1%

The grid of the utilities that serve Madison County, MS. Each grid is a balancing authority. Generation only; imports are excluded. Every grid behind an AI site.

Owners plan 819 MW of new power in Madison County, all gas

power plants in Madison County · EIA-860M, September 2026
  1. Traceview Advanced Power Station Gas · 819 MW · Aug 2028 · being built · Entergy Mississippi LLC

In service in Madison County today: 100 MW. Since January 2023: 100 MW added, 0 MW retired. A plant in the same county does not mean it feeds the site. Power plants near every AI site.

Sources

selected by Epoch AI
  1. Air Construction Permit
  2. Permit review document
  3. Backup diesel generator referenced in the permit
  4. New York Times article on Project Rainier

Data: Epoch AI, “AI data centers”, CC BY 4.0, retrieved 22 Oct 2026. Facility power adds cooling and other overhead to the IT power the servers draw. Placed at the centre of Ridgeland. Grid: U.S. Energy Information Administration, Hourly Electric Grid Monitor (Form EIA-930), public domain, retrieved 16 Oct 2026; utilities by county from Form EIA-861 and the U.S. Census Bureau Geocoder, public domain. Power plants: U.S. Energy Information Administration, Form EIA-860M, public domain, inventory as of September 2026. All sources.