Planned

Jefferson Proving Ground hyperscale data center

Jefferson Proving Ground hyperscale data center is a planned data center in Madison, IN. Reported capacity is 1,000 MW with an estimated investment of $3.5 billion. A ~550-acre hyperscale campus (>1 GW, ~$3.5B) proposed on the former Jefferson Proving Ground. The BZA approved the use; commissioners upheld it and appeals were denied (May-July 2026). An ERA/tax abatement is under discussion with projections of ~$60M/yr in taxes; power sourcing remains unresolved. (Source dated 2026-08-25.).

1,000 MWPlanned capacity

Photo: Madison Courier

Project status

Announced
Permitting
Under constructionNot yet
OperationalNot yet

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Records and documentation

Indiana state legislation

IURC Cause No. 46097 - Indiana Michigan Power (AEP) Large-Load TariffApprovalin.govIURC approved (Feb 2025) a modified large-load tariff for new/expanding loads >70MW single-site: 12-year minimum term, 80% minimum-billing-demand floor, 24-month collateral, exit fee. Settling parties included OUCC, Amazon, Google, Microsoft, Data Center Coalition -- driven by AWS's ~$11B "Project Rainier" (New Carlisle) and Google's Fort Wayne data center.Download
IURC Cause No. 46183 - NIPSCO GenCo Dedicated-Generation FrameworkApprovaliurc.portal.in.govIURC approved (Sept 2025, reaffirmed Nov 2025) a settlement letting GenCo (a NIPSCO affiliate) own/build dedicated generation for large loads so existing customers aren't cost-burdened. Built to serve Amazon data centers.Download
IURC Cause No. 46322 - NIPSCO/GenCo Special Contract + PPA (Amazon)Approvalsecure.in.govOrder issued June 2026 -- GenCo to build two 1.3GW gas plants + 400MW/4hr battery storage, power delivery to Amazon starting Jan 2027 ramping to 2.4GW by 2032. NIPSCO projects ~$1B ratepayer savings.Download
IURC Cause No. 45647 - Duke Energy Indiana TDSIC (Meta Jeffersonville Cost Recovery)Approvalin.govOngoing transmission/distribution infrastructure cost-recovery docket; ~$216M of network upgrades tied to the Meta Jeffersonville data center were recovered through this mechanism, later reviewed by the Indiana Supreme Court on cost allocation.Download
SB0079 - Data center development.Legislationlegiscan.comSenator Deery added as second author Jan 6, 2026Description comingDownload
HB1245 - IURC study of data centers.Legislationlegiscan.comIn committee Jan 5, 2026Description comingDownload

Site details

Operator: Not announced
County: Jefferson County, IN
Capacity: 1,000 MW
Address: Madison, IN
Stage: Planned

Size: not on file

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Photos

RenderingPhoto: Madison Courier
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