Utility
Ameren Missouri and data centers
3 tracked data center projects in Missouri, 600 MW of planned capacity, large-load tariff approved.
Part of Ameren.
Tracked data center projects
| Project | Status | Planned capacity |
|---|---|---|
| CRG Festus Data Center Missouri | Approved | 600 MW |
| AWS Project Green Missouri | Approved | — |
| Gateway Digital Campus Missouri | Approved | — |
Capacity is the planned figure each project publishes (utility load or IT load as the record notes). Total for proposed, approved, under-construction and operating projects: 600 MW, plus 2 with no single capacity figure. A project served by two utilities counts in full for each.
Large-load tariff and rules
- Status
- Large-load tariff or rules approved (2025-11-24)
- Tariff
- Large Load Customer Rate Plan (large load tariff)
- Docket
- ET-2025-0184 (compliance tariff JE-2026-0076), Missouri Public Service Commission
- What it says
- The PSC approved the plan on Nov. 24, 2025 (compliance tariff effective Jan. 4, 2026); the PSC says it requires a 12-year minimum contract, collateral of two years of minimum bills and a monthly demand charge set at 80% of the agreed rate. (Missouri Public Service Commission)
Source excerpt
“Large-load customers must take service for a minimum of 12 years”
Official forecasts of data center load
- Ameren Missouri's 2026 IRP slides report signed electric service agreements for large loads. (Ameren Missouri, 2026-09-28)
Source excerpt
“2.8 GW of signed Electric Service Agreements”
- The 2026 IRP preferred plan assumes total load growth through 2035. (Ameren Missouri, 2026-09-28)
Source excerpt
“Assumes 2.9 GW by 2030 and 5 GW by 2035”
What sources say about customer bills
Sources warning that other customers’ costs could rise
- Missouri Consumers Council (John Coffman): The Consumers Council argued after the order that the PSC favored data center development too heavily. (St. Louis Public Radio, 2025-12-04)
Source excerpt
“the Public Service Commission has gone too far in promoting economic development for these data centers”
Sources saying customers are protected, or bills are lower than they would be
- Missouri Public Service Commission: The PSC says SB 4 required rates that reflect large customers' share of costs and prevent other customers from paying unjust or unreasonable costs. (Missouri Public Service Commission, 2026-04)
Source excerpt
“prevented other customers — like residential and commercial customers — from being charged any unjust or unreasonable costs arising from service to large load customers”
These are statements by regulators, utilities, advocates and researchers about this utility or its region. They are not a prediction of any customer’s bill, which depends on rates, usage and regulator decisions.
More
States: Missouri. Look up another utility · All utilities · Power tracker · Energy news · Tax breaks tracker
Cite this page
Last updated Oct 13, 2026. Figures may change as records are updated — include the date you retrieved them.
| APA | Data Center Census. (2026). Ameren Missouri and data centers. Retrieved from https://datacentercensus.com/utilities/ameren-missouri |
|---|---|
| MLA | “Ameren Missouri and data centers.” Data Center Census, Oct 13, 2026, https://datacentercensus.com/utilities/ameren-missouri. |
| Link | https://datacentercensus.com/utilities/ameren-missouri |
Republishing a figure or table? Attribute it to Data Center Census with a link to this page. The underlying data is downloadable as JSON and CSV; the press kit has standing figures and contact details.