Project Cumulus

cancelled

No MW figure was published; Clayco stated it had 57 active data center projects totalling around 3 GW nationally, which is a company-wide figure. Datacentermap separately lists a 40-acre HPC/AI facility at Harry S Truman Blvd & Highway 370 in Saint Charles under 'Unknown Company', which may be a partial record of the same site; acreage (40 vs 440) conflicts and is not resolved. St. Charles ban date conflict: interconnectedcapital dates the initial one-year ban to 2023-08-22 while other reporting places it in August 2025.

Key data: Ameren Missouri | MISO (Ameren Missouri / AMMO)

Claim classification: Not yet assigned

Status date: 2026-09-13

Open source 1 →

cancelled

Developer: CRG (applicant CRG Cumulus LLC, sharing an address with Clayco) | Permit applicant: CRG Cumulus LLC | County: St. Charles | Research region: St. Louis northwest / St. Charles County | Tenants/customers: Documents obtained by St. Louis Public Radio linked the project to Google; end user was officially unknown

Claim classification: Not yet assigned

Status date: 2026-09-13

Open source 1 →

CORROBORATED

Documents obtained by St. Louis Public Radio linked the secretive St. Charles data center project to Google.

Key data: Documents link Project Cumulus to Google

Claim classification: contested_claim · Verification: source_backed_unverified · Retrieved: 2026-09-13

Limitation: Google did not confirm involvement; attribution rests on documents reviewed by the outlet.

Open source 1 →

cancelled

Key data: Utility: Ameren Missouri | Grid area: MISO (Ameren Missouri / AMMO)

Claim classification: Not yet assigned

Status date: 2026-09-13

Open source 1 →

cancelled

Claim classification: Not yet assigned

Status date: 2026-09-13

Open source 1 →

cancelled

Key data: Jurisdictions: St. Charles | St. Charles County | Missouri

Claim classification: Not yet assigned

Status date: 2026-09-13

Open source 1 →

cancelled

The St. Charles Planning and Zoning Commission on 2025-07-14 recommended approval of the site plan for the 440-acre, 1.5M sq ft, $1 billion CRG Cumulus LLC project on both sides of Highway 370 between Huster Road and Harry S Truman Boulevard, but declined to recommend the conditional use permit needed for liquid petroleum products and generators in a wellhead protection district.

Key data: 440 acres; 1.5M sq ft; $1B; CUP recommendation denied

Claim classification: documented_fact · Verification: source_backed_unverified · Retrieved: 2026-09-13

Status date: 2025-07-14

Limitation: End user was not officially disclosed; no MW figure published.

Open source 1 →

cancelled

Public raised concerns about facility size, placement, diesel fuel handling and flood impacts

Claim classification: Not yet assigned

Status date: 2026-09-13

Open source 1 →

cancelled

Withdrawal triggered a one-year St. Charles ban in August 2025 and a permanent zoning ban on 2026-05-19 (7-1)

Claim classification: Not yet assigned

Status date: 2026-09-13

Open source 1 →

cancelled

Senator Bernie Sanders publicly praised residents after the developers shelved the project

Claim classification: Not yet assigned

Status date: 2026-09-13

Open source 1 →

cancelled

Site described as contaminated land

Claim classification: Not yet assigned

Status date: 2026-09-13

Open source 1 →

cancelled

Diesel fuel would be handled within a wellhead protection district

Claim classification: Not yet assigned

Status date: 2026-09-13

Open source 1 →

cancelled

St. Charles Planning & Zoning recommended the site plan for approval but denied a recommendation for the conditional use permit covering liquid petroleum products and generators

Claim classification: Not yet assigned

Status date: 2025-07-14

Open source 1 →

cancelled

Developer withdrew the controversial St. Charles data center application

Claim classification: Not yet assigned

Status date: 2025-08-18

Open source 1 →

cancelled

St. Charles enacted a one-year ban on data centers

Claim classification: Not yet assigned

Status date: 2025-08-22

Open source 1 →

cancelled

Documents linked the secretive St. Charles data center to Google

Claim classification: Not yet assigned

Status date: 2025-09-08

Open source 1 →

cancelled

St. Charles City Council passed a permanent zoning change banning data centers, 7-1

Claim classification: Not yet assigned

Status date: 2026-05-19

Open source 1 →

cancelled

The developer withdrew the controversial St. Charles data center application in August 2025.

Key data: Application withdrawn August 2025

Claim classification: verified_outcome · Verification: source_backed_unverified · Retrieved: 2026-09-13

Status date: 2025-08-18

Limitation: Withdrawal does not preclude a future refiling elsewhere.

Open source 1 →