St. Joseph's Dormitory
IndustrialCharles Mix County, South Dakota · SPP
At a glance
St. Joseph's Dormitory is an industrial datacenter candidate site in Charles Mix County, South Dakota, scoring 52.0/100 DC Readiness — 35th of 40 scored sites in the county. It sits in the SPP grid region and the NORTHWESTERN ENERGY - (SD) service territory, where interconnection has averaged 4.3 years from request to operation.
Power & interconnection
Speed to power
Middle-of-the-pack interconnection conditions for this grid.
Connectivity
Risk & environment
Location context
Regulatory climate
No notable statewide DC restriction on record; confirm local zoning and utility tariffs.
Incentive detail: No state corporate income tax; no personal income tax; no personal property tax.
Site location
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How does St. Joseph's Dormitory compare with other sites in Charles Mix County?
St. Joseph's Dormitory ranks 35th of 40 scored candidate sites in Charles Mix County. Its 52.0/100 is roughly in line with the county average of 53.4. It is roughly in line with the South Dakota average of 54.7 and roughly in line with the national average of 53.2.
Against the South Dakota average, its strongest sub-score is speed to power (55 vs 52) and its weakest is power availability (30 vs 39). Power and speed to power each carry 20% of the composite score, fiber 12%, water 7% and hazard 6%.
How close is St. Joseph's Dormitory to power, fiber and other datacenters?
For connectivity, the nearest internet exchange facility is Midco Yankton at 51.5 miles. 5 fiber providers report service at the location in FCC broadband data. The closest operating datacenter on record is Midco Yankton, 51.5 miles away.
What are the flood, water and hazard risks at St. Joseph's Dormitory?
At the county level, FEMA's National Risk Index rates Charles Mix County "Relatively Low".
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 Charles Mix County, ranked by DC Readiness.
| Site | Type | Voltage | Capacity | Queue wait | Score |
|---|---|---|---|---|---|
| FORT RANDALL | Substation-Adjacent | 230 kV | 300 MW | 4.3 yrs | 62.6 |
| UNKNOWN131242 | Substation-Adjacent | 115 kV | 100 MW | 4.3 yrs | 58.2 |
| UNKNOWN159245 | Substation-Adjacent | 69 kV | 50 MW | 4.3 yrs | 56.6 |
| UNKNOWN159725 | Substation-Adjacent | 69 kV | 50 MW | 4.3 yrs | 55.9 |
| UNKNOWN131240 | Substation-Adjacent | 69 kV | 50 MW | 4.3 yrs | 55.8 |
| TAP159731 | Substation-Adjacent | 69 kV | 50 MW | 4.3 yrs | 55.8 |
| TAP159728 | Substation-Adjacent | 69 kV | 50 MW | 4.3 yrs | 55.5 |
| TAP159729 | Substation-Adjacent | 69 kV | 50 MW | 4.3 yrs | 55.3 |
St. Joseph's Dormitory: common questions
What is the DC Readiness score of St. Joseph's Dormitory?
St. Joseph's Dormitory scores 52.0/100 on the GridCensus DC Readiness scale, rated fair. It ranks 35th of 40 scored sites in Charles Mix County. The Charles Mix County average is 53.4 and the South Dakota average is 54.7.
Which electric utility serves St. Joseph's Dormitory?
NORTHWESTERN ENERGY - (SD) (investor owned) holds the retail service territory that contains the site; its holding company is NORTHWESTERN ENERGY.
What grid region is St. Joseph's Dormitory in?
St. Joseph's Dormitory is in the SPP region. Projects interconnecting there have averaged a 4.3-year wait from queue request to operation.
How far is St. Joseph's Dormitory from an internet exchange?
The nearest internet exchange facility is Midco Yankton, about 51.5 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, “St. Joseph's Dormitory, Charles Mix County, SD”, https://gridcensus.com/datacenter-sites/south-dakota/charles-mix-county/st-joseph-s-dormitory-b7ff93d1 (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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