Greenfield (ROYSE - UNKNOWN309575)
GreenfieldRockwall County, Texas · ERCOT
At a glance
Greenfield (ROYSE - UNKNOWN309575) is a greenfield datacenter candidate site in Rockwall County, Texas, scoring 53.8/100 DC Readiness — 38th of 38 scored sites in the county. Its nearest substation is ROYSE. It sits in the ERCOT grid region and the ONCOR ELECTRIC DELIVERY COMPANY LLC service territory, where interconnection has averaged 3.5 years from request to operation. GridCensus catalogs 100 MW of candidate capacity here.
Power & interconnection
Speed to power
Texas note: Since August 3, 2026, ERCOT has paused approvals to energize new datacenter and crypto-mining loads of 75 MW or more until a verification audit and a community impact review are complete; both reports are due to the Public Utility Commission of Texas by December 10, 2026. ERCOT speed-to-power scores here were set before the pause and do not reflect it. ERCOT board update.
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 statewide moratorium, but since Aug 3, 2026 ERCOT has paused approvals to energize new datacenter and crypto loads ≥75 MW pending an audit due Dec 10, 2026. SB 6 adds large-load obligations above 75 MW.
SB 6: loads ≥75 MW accept ERCOT emergency curtailment + contribute to interconnection cost.
Incentive detail: Chapter 313/Chapter 403 property tax abatements; Texas Enterprise Fund; no state income tax.
Site location
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How does Greenfield (ROYSE - UNKNOWN309575) compare with other sites in Rockwall County?
Greenfield (ROYSE - UNKNOWN309575) ranks 38th of 38 scored candidate sites in Rockwall County. Its 53.8/100 is about 14% below the county average of 62.6. It is roughly in line with the Texas average of 56.4 and roughly in line with the national average of 53.2.
Against the Texas average, its strongest sub-score is speed to power (78 vs 72) and its weakest is power availability (30 vs 46). Power and speed to power each carry 20% of the composite score, fiber 12%, water 7% and hazard 6%.
How close is Greenfield (ROYSE - UNKNOWN309575) to power, fiber and other datacenters?
The nearest mapped substation, ROYSE, is the closest grid connection point on record and operates at 138 kV. The nearest located transmission bottleneck is 1395__A (ERCOT), 18 miles away. For connectivity, the nearest internet exchange facility is Stream Data Centers - DFW VII at 22.1 miles. 13 fiber providers report service at the location in FCC broadband data. The closest operating datacenter on record is DFW11 Garland, 19.9 miles away.
What are the flood, water and hazard risks at Greenfield (ROYSE - UNKNOWN309575)?
At the county level, FEMA's National Risk Index rates Rockwall 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 Rockwall County, ranked by DC Readiness.
| Site | Type | Voltage | Capacity | Queue wait | Score |
|---|---|---|---|---|---|
| BEN DAVIS | Substation-Adjacent | 345 kV | 600 MW | 3.5 yrs | 69.1 |
| UNKNOWN309024 | Substation-Adjacent | 345 kV | 600 MW | 3.5 yrs | 68.1 |
| FORNEY SW | Substation-Adjacent | 345 kV | 600 MW | 3.5 yrs | 67.7 |
| UNKNOWN300775 | Substation-Adjacent | 345 kV | 600 MW | 3.5 yrs | 67.6 |
| ROYSE | Substation-Adjacent | 345 kV | 600 MW | 3.5 yrs | 66.9 |
| EC FFE Rockwall County | Greenfield | — | — | 3.5 yrs | 65.3 |
| FIREWHEEL | Substation-Adjacent | 138 kV | 100 MW | 3.5 yrs | 64.2 |
| BRAND | Substation-Adjacent | 138 kV | 100 MW | 3.5 yrs | 64.1 |
Greenfield (ROYSE - UNKNOWN309575): common questions
What is the DC Readiness score of Greenfield (ROYSE - UNKNOWN309575)?
Greenfield (ROYSE - UNKNOWN309575) scores 53.8/100 on the GridCensus DC Readiness scale, rated fair. It ranks 38th of 38 scored sites in Rockwall County. The Rockwall County average is 62.6 and the Texas average is 56.4.
What is the nearest substation to Greenfield (ROYSE - UNKNOWN309575)?
The nearest mapped substation is ROYSE, at 138 kV. GridCensus catalogs 100 MW of candidate capacity for the site.
Which electric utility serves Greenfield (ROYSE - UNKNOWN309575)?
ONCOR ELECTRIC DELIVERY COMPANY LLC (investor owned) holds the retail service territory that contains the site.
What grid region is Greenfield (ROYSE - UNKNOWN309575) in?
Greenfield (ROYSE - UNKNOWN309575) is in the ERCOT region. Projects interconnecting there have averaged a 3.5-year wait from queue request to operation.
How far is Greenfield (ROYSE - UNKNOWN309575) from an internet exchange?
The nearest internet exchange facility is Stream Data Centers - DFW VII, about 22.1 miles away; 13 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 (ROYSE - UNKNOWN309575), Rockwall County, TX”, https://gridcensus.com/datacenter-sites/texas/rockwall-county/greenfield-royse-unknown309575-d22f90c1 (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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