Interconnection queue size, large-load pipeline, generation mix, and transmission context by grid operator — a first look at whether new load can actually get firm power delivered, not just whether a queue slot exists.
Editorial rating based on queue size vs. system scale, generation mix and transmission context
Total queue and large-load pipeline are each operator's most recent disclosed figures (generation + storage + large-load, whichever basis is reported) — not on a consistent basis across operators, so don't sum or compare 1:1 across countries. Deliverability is an editorial High/Medium/Low rating based on queue size vs. system scale, generation mix, and transmission context.
| Grid Operator | Region/State | Total Queue (MW) | Large-Load Pipeline (MW) | Deliverability | Confidence | Source |
|---|---|---|---|---|---|---|
| ERCOT | Texas | 453,562 | 438,000 | Medium | B | Electric Reliability Council of Texas (ERCOT) |
| PJM | Mid-Atlantic and Midwest | 220,000 | — | Low | A | PJM Interconnection |
| SPP | 14-state central and western United States footprint | 151,000 | 26,400 | Medium | B | Southwest Power Pool (SPP) |
| PacifiCorp West | California | 51,350 | — | Medium | C | PacifiCorp |
| SRP | Central Arizona | 21,400 | 6,944 | Low | B | Salt River Project (SRP) |
| NEVP | Southern Nevada | 17,610 | 22,000 | Medium | B | NV Energy (NEVP) |
| NorthWestern Energy | Western two-thirds of Montana and eastern South Dakota; natural-gas service also extends into Nebraska | 16,380 | 2,250 | Low | B | NorthWestern Energy |
| Avista | Inland Northwest—primarily eastern Washington | 14,520 | 500 | Low | B | Avista Corporation |
| TEP | Southern Arizona | 9,270 | 286 | Medium | B | Tucson Electric Power (TEP) |
| PNM | New Mexico | 4,197 | 4,197 | Medium | B | Public Service Company of New Mexico (PNM) |
| PSCo | Colorado | 3,500 | 16,100 | Low | B | Public Service Company of Colorado (PSCo) / Xcel Energy |
| PGE | Oregon / Pacific Northwest | 3,000 | 3,000 | Low | B | Portland General Electric (2025 Annual Report) |
| FPL | Florida | 1,000 | 8,000 | Medium | B | Florida Power & Light Company |
| TECO | West Central Florida | — | — | Medium | B | Florida Public Service Commission / Tampa Electric Company 2025 Ten-Year Site Plan |
| DESC | Central | — | — | Medium | B | Dominion Energy South Carolina |
| Grid Operator | Region/State | Total Queue (MW) | Large-Load Pipeline (MW) | Deliverability | Confidence | Source |
|---|---|---|---|---|---|---|
| RTE | France | 33,000 | 25,000 | Low | A | RTE (Réseau de transport d’électricité) |
| TenneT (Netherlands) | Netherlands | 60,000 | 7,900 | Low | B | TenneT Netherlands |
| TEPCO | Japan | 15,200 | 15,200 | Low | A | TEPCO Power Grid |
| EMA | Singapore | 1,800 | 500 | Medium | B | Energy Market Authority (EMA) of Singapore |
| 50Hertz | Germany | 30,000 | — | Medium | B | 50Hertz Transmission GmbH |
| EirGrid | Ireland | 11,664 | 6,000 | Low | B | EirGrid |
| Amprion | Germany | 86,000 | — | Low | B | Regelleistung-Online / Amprion GmbH |
| TenneT (Germany) | Germany | 77,000 | 3,000 | Low | A | TenneT Germany (TenneT TSO GmbH) |
| Svenska kraftnat | Sweden | 45,157 | 4,500 | Low | B | Svenska kraftnät |
| AEMO | Australia | 84,000 | 9,000 | Medium | A | Australian Energy Market Operator (AEMO) |
| NESO | United Kingdom | 738,000 | 50,000 | Low | A | National Energy System Operator (NESO) |
The headline queue overstates what will connect: most contracted capacity is storage and solar at scoping, dated 2028 to 2037. For a large new load the binding constraint is local. Deliverable headroom is spread thinly, capacity near London’s internet exchanges is scarce (2.8 GW within 25 km), and UK Power Networks’ operating data centers draw only about 21% of the capacity they contract, which keeps the queue inflated.
Detail: UK Grid Capacity · UK Power & Connectivity · UK Data Center Load Profiles · UK Network Utilisation