St. Mary Mixed Use Development
IndustrialDallas County, Texas · ERCOT
At a glance
St. Mary Mixed Use Development is an industrial datacenter candidate site in Dallas County, Texas, scoring 57.8/100 DC Readiness — 218th of 308 scored sites in the county. It sits in the ERCOT grid region and the TEXAS-NEW MEXICO POWER CO service territory, where interconnection has averaged 3.5 years from request to operation.
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 St. Mary Mixed Use Development compare with other sites in Dallas County?
St. Mary Mixed Use Development ranks 218th of 308 scored candidate sites in Dallas County. Its 57.8/100 is roughly in line with the county average of 61.3. 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 fiber connectivity (97 vs 71) 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 St. Mary Mixed Use Development to power, fiber and other datacenters?
The nearest located transmission bottleneck is 1395__A (ERCOT), 15 miles away. For connectivity, the nearest internet exchange facility is Colo4Dallas at 2.3 miles. 28 fiber providers report service at the location in FCC broadband data. The closest operating datacenter on record is TierPoint Dallas Data Center, 2.3 miles away.
What are the flood, water and hazard risks at St. Mary Mixed Use Development?
At the county level, FEMA's National Risk Index rates Dallas 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 Dallas County, ranked by DC Readiness.
| Site | Type | Voltage | Capacity | Queue wait | Score |
|---|---|---|---|---|---|
| WEST PLANO | Substation-Adjacent | 345 kV | 600 MW | 3.5 yrs | 70.1 |
| WEST LEVEE | Substation-Adjacent | 345 kV | 600 MW | 3.5 yrs | 70.1 |
| LIGGETT | Substation-Adjacent | 345 kV | 600 MW | 3.5 yrs | 70.1 |
| UNKNOWN306290 | Substation-Adjacent | 345 kV | 600 MW | 3.5 yrs | 70.0 |
| UNKNOWN300342 | Substation-Adjacent | 345 kV | 600 MW | 3.5 yrs | 69.9 |
| NORWOOD | Substation-Adjacent | 345 kV | 600 MW | 3.5 yrs | 69.9 |
| UNKNOWN301639 | Substation-Adjacent | 345 kV | 600 MW | 3.5 yrs | 69.8 |
| NORTHWEST CARROLLTON | Substation-Adjacent | 345 kV | 600 MW | 3.5 yrs | 69.3 |
St. Mary Mixed Use Development: common questions
What is the DC Readiness score of St. Mary Mixed Use Development?
St. Mary Mixed Use Development scores 57.8/100 on the GridCensus DC Readiness scale, rated good. It ranks 218th of 308 scored sites in Dallas County. The Dallas County average is 61.3 and the Texas average is 56.4.
Which electric utility serves St. Mary Mixed Use Development?
TEXAS-NEW MEXICO POWER CO (investor owned) holds the retail service territory that contains the site; its holding company is PNM RESOURCES INC.
What grid region is St. Mary Mixed Use Development in?
St. Mary Mixed Use Development is in the ERCOT region. Projects interconnecting there have averaged a 3.5-year wait from queue request to operation.
How far is St. Mary Mixed Use Development from an internet exchange?
The nearest internet exchange facility is Colo4Dallas, about 2.3 miles away; 28 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, “St. Mary Mixed Use Development, Dallas County, TX”, https://gridcensus.com/datacenter-sites/texas/dallas-county/st-mary-mixed-use-development-74b27faf (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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