Rural SPP follows at 67.2; constraint spread widens as summer demand peaks
## Highlights
Cheyenne, Wyoming's excess-power index reached **69.5 this week**âthe highest read across DC Hub's tracked WECC markets and well above the ISO median of 45. Rural SPP (Kansas, WECC-adjacent) follows closely at 67.2, signaling sustained grid headroom in the Mountain and Great Plains corridors as July demand ramps.
## What It Means
Both markets carry a **22.5-point constraint differential**, leaving meaningful runway for new load before transmission or generation becomes binding. For capacity planners, this is a green signal: Cheyenne offers the fastest time-to-power in the Western Interconnection and the lowest permitting friction in a major metro region. Rural SPP is ideal for subsurface or edge-compute clusters where land cost and latency tolerance are secondary to grid certainty.
## Market Dynamics
The spread between excess capacity (69.5) and active constraint (22.5) in Cheyenne reflects robust local wind and hydro offset, combined with moderate transmission utilization. This is not a transient peak; it reflects summer baseline operations. Builders moving now into preliminary siting will lock power availability before late-Q3 tightening cycles typical in WECC.
## Methodology
DC Hub's excess-power index aggregates real-time and day-ahead LMP signals, transmission utilization, and queued interconnections. Constraint scores reflect binding thermal, voltage, or stability limits. Markets scoring 65+ indicate lowest-friction sites for the next 12â24 months of capacity deployment.
**Source:** DC Hub Data Center Power Index (https://dchub.cloud/dcpi). Updated daily. | **Press inquiries:** press@dchub.cloud · **DC Hub MCP API:** https://dchub.cloud/mcp