McConnico Switching Station
Federal ExcessMohave County, Arizona · WECC
McConnico Switching Station is a federal excess datacenter candidate site in Mohave County, Arizona, interconnecting through WECC. It screens at 45.7/100 DC Readiness and a 3.5 yrs average interconnection-queue wait.
Power & interconnection
Speed to power
Deep queue and long historical waits — plan for a multi-year interconnection timeline and engage the utility early.
Connectivity
Site characteristics
Risk & environment
Location context
Regulatory climate
Sales-tax exemption suspended Jul 2026–Jun 2029; water constraints add scrutiny.
Incentive detail: Government Property Lease Excise Tax (GPLET) for qualified facilities on government land.
Site location
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Full DC Readiness breakdown
All 13 weighted sub-scores (0–100) behind the composite DC Readiness score.
Nearby comparable sites
Other scored datacenter candidate sites in Mohave County, ranked by DC Readiness.
| Site | Type | Voltage | Capacity | Queue wait | Score |
|---|---|---|---|---|---|
| UNKNOWN301539 | Substation-Adjacent | 500 kV | 1,000 MW | 7.6 yrs | 63.6 |
| EC Coal Mohave County | Greenfield | — | — | 3.5 yrs | 58.8 |
| EC Coal Mohave County | Greenfield | — | — | 3.5 yrs | 58.6 |
| PEACOCK | Substation-Adjacent | 345 kV | 600 MW | 3.5 yrs | 57.7 |
| MCCONNICO | Substation-Adjacent | 230 kV | 300 MW | 3.5 yrs | 56.5 |
| GRIFFITH | Substation-Adjacent | 230 kV | 300 MW | 3.5 yrs | 56.5 |
| UNKNOWN310988 | Substation-Adjacent | 230 kV | 300 MW | 3.5 yrs | 56.4 |
| DAVIS | Substation-Adjacent | 230 kV | 300 MW | 3.5 yrs | 56.4 |
Dataset updated . Screening estimates derived from public data sources.
Figures are screening estimates derived from public infrastructure data. Catalogued capacity reflects theoretical candidate capacity, not deliverable or committed interconnection. Confirm all values with the utility, ISO, and on-the-ground due diligence.
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