JARRELL
Substation-AdjacentWilliamson County, Texas · ERCOT
At a glance
JARRELL is a substation-adjacent datacenter candidate site in Williamson County, Texas, scoring 58.7/100 DC Readiness — 35th of 78 scored sites in the county. Its nearest substation is JARRELL (0 mi, 138 kV). 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 JARRELL compare with other sites in Williamson County?
JARRELL ranks 35th of 78 scored candidate sites in Williamson County. Its 58.7/100 is roughly in line with the county average of 57.3. It is roughly in line with the Texas average of 56.4 and about 10% above the national average of 53.2.
Against the Texas average, its strongest sub-score is power availability (58 vs 46) and its weakest is fiber connectivity (65 vs 71). Power and speed to power each carry 20% of the composite score, fiber 12%, water 7% and hazard 6%.
How close is JARRELL to power, fiber and other datacenters?
The nearest mapped substation, JARRELL, is about 0 miles away and operates at 138 kV. The nearest located transmission bottleneck is 1710__A (ERCOT), 3 miles away. For connectivity, the nearest internet exchange facility is DataBank Austin (AUS1) at 27.6 miles. 17 fiber providers report service at the location in FCC broadband data. The closest operating datacenter on record is Switch: The Rock, 22.3 miles away.
What are the flood, water and hazard risks at JARRELL?
At the county level, FEMA's National Risk Index rates Williamson 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 Williamson County, ranked by DC Readiness.
| Site | Type | Voltage | Capacity | Queue wait | Score |
|---|---|---|---|---|---|
| ROUND ROCK NORTHEAST | Substation-Adjacent | 345 kV | 600 MW | 3.5 yrs | 67.5 |
| UNKNOWN301969 | Substation-Adjacent | 345 kV | 600 MW | 3.5 yrs | 67.2 |
| UNKNOWN307710 | Substation-Adjacent | 345 kV | 600 MW | 3.5 yrs | 67.2 |
| OZ Williamson | Greenfield | — | — | 3.5 yrs | 64.1 |
| NORTHWEST | Substation-Adjacent | 138 kV | 100 MW | 3.5 yrs | 63.3 |
| ROUND ROCK SOUTH | Substation-Adjacent | 138 kV | 100 MW | 3.5 yrs | 63.0 |
| TAP305284 | Substation-Adjacent | 138 kV | 100 MW | 3.5 yrs | 63.0 |
| ROUND ROCK | Substation-Adjacent | 138 kV | 100 MW | 3.5 yrs | 62.9 |
JARRELL: common questions
What is the DC Readiness score of JARRELL?
JARRELL scores 58.7/100 on the GridCensus DC Readiness scale, rated good. It ranks 35th of 78 scored sites in Williamson County. The Williamson County average is 57.3 and the Texas average is 56.4.
What is the nearest substation to JARRELL?
The nearest mapped substation is JARRELL, about 0 miles away, at 138 kV. GridCensus catalogs 100 MW of candidate capacity for the site.
Which electric utility serves JARRELL?
ONCOR ELECTRIC DELIVERY COMPANY LLC (investor owned) holds the retail service territory that contains the site.
What grid region is JARRELL in?
JARRELL is in the ERCOT region. Projects interconnecting there have averaged a 3.5-year wait from queue request to operation.
How far is JARRELL from an internet exchange?
The nearest internet exchange facility is DataBank Austin (AUS1), about 27.6 miles away; 17 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, “JARRELL, Williamson County, TX”, https://gridcensus.com/datacenter-sites/texas/williamson-county/jarrell-e13b669f (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 JARRELL, Williamson 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.