IRON MT
Substation-AdjacentRiverside County, California · CAISO
At a glance
IRON MT is a substation-adjacent datacenter candidate site in Riverside County, California, scoring 52.0/100 DC Readiness — 24th of 376 scored sites in the county. Its nearest substation is IRON MT (0 mi, 230 kV). It sits in the CAISO grid region and the SOUTHERN CALIFORNIA EDISON CO service territory, where interconnection has averaged 7.6 years from request to operation. GridCensus catalogs 300 MW of candidate capacity here.
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
No notable statewide DC restriction on record; confirm local zoning and utility tariffs.
Site location
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How does IRON MT compare with other sites in Riverside County?
IRON MT ranks 24th of 376 scored candidate sites in Riverside County. Its 52.0/100 is about 14% above the county average of 45.5. It is about 15% above the California average of 45.4 and roughly in line with the national average of 53.2.
Against the California average, its strongest sub-score is power availability (78 vs 36) and its weakest is water (24 vs 27). Power and speed to power each carry 20% of the composite score, fiber 12%, water 7% and hazard 6%.
How close is IRON MT to power, fiber and other datacenters?
The nearest mapped substation, IRON MT, is about 0 miles away and operates at 230 kV. The nearest located transmission bottleneck is 99254_J.HINDS2_230_24806_MIRAGE _230_BR_1 _1 (CAISO), 75 miles away. For connectivity, the nearest internet exchange facility is AISO Data Center at 119.7 miles. 15 fiber providers report service at the location in FCC broadband data. The closest operating datacenter on record is AISO Data Center, 119.7 miles away.
What are the flood, water and hazard risks at IRON MT?
The site is in FEMA flood zone D, where flood risk has not been determined. At the county level, FEMA's National Risk Index rates Riverside County "Relatively High".
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 Riverside County, ranked by DC Readiness.
| Site | Type | Voltage | Capacity | Queue wait | Score |
|---|---|---|---|---|---|
| DEVERS | Substation-Adjacent | 500 kV | 1,000 MW | 7.6 yrs | 57.7 |
| Tequesquite Landfill | Brownfield | 66 kV | 8 MW | 7.6 yrs | 57.0 |
| RED BLUFF | Substation-Adjacent | 500 kV | 1,000 MW | 7.6 yrs | 56.6 |
| OZ Riverside | Greenfield | — | — | 7.6 yrs | 54.7 |
| OZ Riverside | Greenfield | — | — | 7.6 yrs | 54.2 |
| OZ Riverside | Greenfield | — | — | 7.6 yrs | 54.1 |
| CAPACITOR | Substation-Adjacent | 345 kV | 600 MW | 7.6 yrs | 54.0 |
| OZ Riverside | Greenfield | — | — | 7.6 yrs | 53.9 |
IRON MT: common questions
What is the DC Readiness score of IRON MT?
IRON MT scores 52.0/100 on the GridCensus DC Readiness scale, rated fair. It ranks 24th of 376 scored sites in Riverside County. The Riverside County average is 45.5 and the California average is 45.4.
What is the nearest substation to IRON MT?
The nearest mapped substation is IRON MT, about 0 miles away, at 230 kV. GridCensus catalogs 300 MW of candidate capacity for the site.
Which electric utility serves IRON MT?
SOUTHERN CALIFORNIA EDISON CO (investor owned) holds the retail service territory that contains the site; its holding company is SOUTHERN CALIFORNIA EDISON.
What grid region is IRON MT in?
IRON MT is in the CAISO region. Projects interconnecting there have averaged a 7.6-year wait from queue request to operation.
Is IRON MT in a flood zone?
The site is in FEMA flood zone D, where flood risk has not been determined.
How far is IRON MT from an internet exchange?
The nearest internet exchange facility is AISO Data Center, about 119.7 miles away; 15 fiber providers report service at the location.
Related pages
About this data
Source: GridCensus composite of HIFLD transmission and substation data, EIA, FEMA National Risk Index, FCC broadband data, PeeringDB and ISO interconnection queues, as published October 10, 2026 — GridCensus refreshes it monthly. See the methodology for how records are matched, cleaned and scored.
Cite as: GridCensus, “IRON MT, Riverside County, CA”, https://gridcensus.com/datacenter-sites/california/riverside-county/iron-mt-09308add (data as of October 10, 2026).
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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