Greenfield (MARTIN - MIDWAY)
GreenfieldSt. Lucie County, California · SERC
At a glance
Greenfield (MARTIN - MIDWAY) is a greenfield datacenter candidate site in St. Lucie County, California, scoring 55.8/100 DC Readiness — 29th of 51 scored sites in the county. Its nearest substation is MARTIN. It sits in the SERC grid region, where interconnection has averaged 7.6 years from request to operation. GridCensus catalogs 1,000 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.
Incentive detail: Sales tax exemption on manufacturing machinery including servers; no state income tax.
Site location
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How does Greenfield (MARTIN - MIDWAY) compare with other sites in St. Lucie County?
Greenfield (MARTIN - MIDWAY) ranks 29th of 51 scored candidate sites in St. Lucie County. Its 55.8/100 is roughly in line with the county average of 55.9. It is about 23% 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 water (76 vs 27) and its weakest is natural hazard (45 vs 51). Power and speed to power each carry 20% of the composite score, fiber 12%, water 7% and hazard 6%.
How close is Greenfield (MARTIN - MIDWAY) to power, fiber and other datacenters?
The nearest mapped substation, MARTIN, is the closest grid connection point on record and operates at 500 kV. For connectivity, the nearest internet exchange facility is Telxius Boca Raton DC at 64.1 miles. 8 fiber providers report service at the location in FCC broadband data. The closest operating datacenter on record is Equinix MI3 - Miami, Boca Raton, 65.4 miles away.
What are the flood, water and hazard risks at Greenfield (MARTIN - MIDWAY)?
At the county level, FEMA's National Risk Index rates St. Lucie County "Very 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 St. Lucie County, ranked by DC Readiness.
| Site | Type | Voltage | Capacity | Queue wait | Score |
|---|---|---|---|---|---|
| MIDWAY | Substation-Adjacent | 500 kV | 1,000 MW | 3.7 yrs | 65.0 |
| SANDPIPER | Substation-Adjacent | 230 kV | 300 MW | 3.7 yrs | 61.4 |
| EMERSON | Substation-Adjacent | 230 kV | 300 MW | 3.7 yrs | 61.3 |
| UNKNOWN120574 | Substation-Adjacent | 230 kV | 300 MW | 3.7 yrs | 61.3 |
| ALLAPATTAH | Substation-Adjacent | 230 kV | 300 MW | 3.7 yrs | 60.7 |
| UNKNOWN120597 | Substation-Adjacent | 230 kV | 300 MW | 3.7 yrs | 60.7 |
| UNKNOWN120596 | Substation-Adjacent | 230 kV | 300 MW | 3.7 yrs | 60.7 |
| RALLS | Substation-Adjacent | 230 kV | 300 MW | 3.7 yrs | 60.7 |
Greenfield (MARTIN - MIDWAY): common questions
What is the DC Readiness score of Greenfield (MARTIN - MIDWAY)?
Greenfield (MARTIN - MIDWAY) scores 55.8/100 on the GridCensus DC Readiness scale, rated good. It ranks 29th of 51 scored sites in St. Lucie County. The St. Lucie County average is 55.9 and the California average is 45.4.
What is the nearest substation to Greenfield (MARTIN - MIDWAY)?
The nearest mapped substation is MARTIN, at 500 kV. GridCensus catalogs 1,000 MW of candidate capacity for the site.
What grid region is Greenfield (MARTIN - MIDWAY) in?
Greenfield (MARTIN - MIDWAY) is in the SERC region. Projects interconnecting there have averaged a 7.6-year wait from queue request to operation.
How far is Greenfield (MARTIN - MIDWAY) from an internet exchange?
The nearest internet exchange facility is Telxius Boca Raton DC, about 64.1 miles away; 8 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, “Greenfield (MARTIN - MIDWAY), St. Lucie County, CA”, https://gridcensus.com/datacenter-sites/california/st-lucie-county/greenfield-martin-midway-5868e4f9 (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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