Capacity slated for 2026 vs under construction in Sightline Climate's tracked large-project cohort (February 24, 2026 snapshot)
≥16 GW vs ~5 GWobserved
| Value kind | observed — Reported measurements, counts, and specifications keep the precision and scope stated by their source; an exact specification is not treated as a range. |
|---|---|
| Scope | Large data centers and AI factories (>50 MW) announced since 2024; about 5 GW of at least 16 GW slated for 2026 was under construction. Not a census of all US construction. |
| As of | 2026-02 |
| Source | Sightline Climate (now Currence), Data Center Outlook Q1 2026 · At least 16 GW across roughly 140 projects slated for 2026; only about 5 GW under construction; about 11 GW at the announced stage (cohort: >50 MW, announced since 2024; 190 GW across 777 projects tracked) |
| Review | checking…review by 2027-02-24 · standard cadence |
| Recorded changes | last 2026-10-05 · 2 revisions tracked |
| Claim id | us-2026-capacity-announced-vs-actually-under |
Where the guide uses it
← Full numbers register — every date-stamped figure in the guide, with revision history.