Pin date stays at the 17 Aug 2026 NVIDIA[1] announcement. The 20 March 2026 event was a ceremonial groundbreaking for the broader 10 GW campus; the only completion target is phases from 2028 (year precision).
NVIDIA guarantees leases on about 4.25 GW of AI factory capacity at SB Energy's PORTS-Pike Technology Campus on the former Portsmouth uranium-enrichment site in Pike County, Ohio, with OpenAI as tenant and NVIDIA's exposure capped at $105 billion. A groundbreaking event was held on 20 March 2026 and the first 800 MW phase is slated to start construction in 2026, with capacity coming online in phases from 2028; verified physical data center construction has not been found, so the pin stays Proposed.