Rural SPP in Kansas follows at 67.2 while Dublin, London, Amsterdam hit constraint ceiling above 70
## Cheyenne Leads US Build Markets
Cheyenne, WY climbed to the top of the DC Hub Power Index (DCPI) BUILD ranking with an excess power score of **69.5** and constraint score of just **22.5**, making it the most attractive greenfield data center market in the platform's live tracking of 306 markets across 4 continents.
The Wyoming market, anchored in the **WECC** balancing authority, outpaced Rural SPP (Kansas) at 67.2 excess and reflects growing hyperscale interest in secondary markets with abundant baseload capacity and minimal interconnection queues. Cheyenne's advantage: direct access to wind-rich transmission corridors and state tax incentives purpose-built for large industrial loads.
## The Constraint Wall
Meanwhile, **Dublin, OH** (PJM), **London** (NGESO), and **Amsterdam** (ENTSOE-NL) occupy the AVOID tier with constraint scores above **70** and excess power in the teens. Dublin scored 22.4 excess / 72.5 constraint — a textbook case of grid saturation in a legacy colocation hub. London (13.5 excess) and Amsterdam (13.7 excess) face similar headwinds: data center moratoriums, fossil-fuel phase-outs, and interconnection wait times measured in years, not months.
The divergence is structural. US secondary markets are adding gigawatts of renewable capacity WITH transmission build-out; European Tier-1s are rationing existing substations among competing hyperscale queues.
## What It Means
Developers chasing the AI build-out are bifurcating into two camps: those betting on brownfield retrofits in constrained metros (expensive, slow) and those pioneering greenfield builds in WECC/SPP markets with live capacity today. Cheyenne's score reflects the latter playbook — and the reason DC Hub exists. Quarterly PDFs can't tell you where to break ground tomorrow. Live grid telemetry can.
**Source:** DC Hub Data Center Power Index (https://dchub.cloud/dcpi). Updated daily.
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