Greenfield (SWEETWATER - MADISONVILLE)
GreenfieldLoudon County, California · SERC
At a glance
Greenfield (SWEETWATER - MADISONVILLE) is a greenfield datacenter candidate site in Loudon County, California, scoring 53.3/100 DC Readiness — 29th of 29 scored sites in the county. Its nearest substation is SWEETWATER. It sits in the SERC grid region, where interconnection has averaged 7.6 years from request to operation. GridCensus catalogs 100 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 DC equipment for $250M+ investments; no state income tax on wages.
Site location
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How does Greenfield (SWEETWATER - MADISONVILLE) compare with other sites in Loudon County?
Greenfield (SWEETWATER - MADISONVILLE) ranks 29th of 29 scored candidate sites in Loudon County. Its 53.3/100 is about 12% below the county average of 60.9. It is about 17% 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 (90 vs 27) and its weakest is power availability (32 vs 36). Power and speed to power each carry 20% of the composite score, fiber 12%, water 7% and hazard 6%.
How close is Greenfield (SWEETWATER - MADISONVILLE) to power, fiber and other datacenters?
The nearest mapped substation, SWEETWATER, is the closest grid connection point on record and operates at 161 kV. For connectivity, the nearest internet exchange facility is LCUB Data Center at 20.9 miles. 5 fiber providers report service at the location in FCC broadband data. The closest operating datacenter on record is Frontier (supercomputer), 25.7 miles away.
What are the flood, water and hazard risks at Greenfield (SWEETWATER - MADISONVILLE)?
At the county level, FEMA's National Risk Index rates Loudon 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 Loudon County, ranked by DC Readiness.
| Site | Type | Voltage | Capacity | Queue wait | Score |
|---|---|---|---|---|---|
| EATON | Substation-Adjacent | 161 kV | 100 MW | 3.9 yrs | 63.9 |
| FORT LOUDON DAM | Substation-Adjacent | 161 kV | 100 MW | 3.9 yrs | 63.8 |
| WATT ROAD | Substation-Adjacent | 161 kV | 100 MW | 3.9 yrs | 63.6 |
| OZ Loudon | Greenfield | — | — | 3.9 yrs | 63.6 |
| UNKNOWN115833 | Substation-Adjacent | 161 kV | 100 MW | 3.9 yrs | 63.5 |
| UNKNOWN115834 | Substation-Adjacent | 161 kV | 100 MW | 3.9 yrs | 63.4 |
| TAP154772 | Substation-Adjacent | 161 kV | 100 MW | 3.9 yrs | 63.4 |
| TAP152166 | Substation-Adjacent | 161 kV | 100 MW | 3.9 yrs | 63.4 |
Greenfield (SWEETWATER - MADISONVILLE): common questions
What is the DC Readiness score of Greenfield (SWEETWATER - MADISONVILLE)?
Greenfield (SWEETWATER - MADISONVILLE) scores 53.3/100 on the GridCensus DC Readiness scale, rated fair. It ranks 29th of 29 scored sites in Loudon County. The Loudon County average is 60.9 and the California average is 45.4.
What is the nearest substation to Greenfield (SWEETWATER - MADISONVILLE)?
The nearest mapped substation is SWEETWATER, at 161 kV. GridCensus catalogs 100 MW of candidate capacity for the site.
What grid region is Greenfield (SWEETWATER - MADISONVILLE) in?
Greenfield (SWEETWATER - MADISONVILLE) is in the SERC region. Projects interconnecting there have averaged a 7.6-year wait from queue request to operation.
How far is Greenfield (SWEETWATER - MADISONVILLE) from an internet exchange?
The nearest internet exchange facility is LCUB Data Center, about 20.9 miles away; 5 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 (SWEETWATER - MADISONVILLE), Loudon County, CA”, https://gridcensus.com/datacenter-sites/california/loudon-county/greenfield-sweetwater-madisonville-b275c078 (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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Every site and score for Greenfield (SWEETWATER - MADISONVILLE), Loudon County is free to browse. Pro adds Watchtower on 25 sites, alerts when new candidate sites, datacenters or interconnection-queue requests appear in your markets, score and capacity history, and CSV export. Enterprise adds team seats, weekly data files for all 147,272 sites, the REST API and an MCP server for AI tools.