Greenfield (UNKNOWN131292 - SPLIT ROCK)
GreenfieldMinnehaha County, South Dakota · MISO
At a glance
Greenfield (UNKNOWN131292 - SPLIT ROCK) is a greenfield datacenter candidate site in Minnehaha County, South Dakota, scoring 56.1/100 DC Readiness — 81st of 95 scored sites in the county. Its nearest substation is UNKNOWN131292. It sits in the MISO grid region and the SIOUX VALLEY SW ELEC COOP service territory, where interconnection has averaged 4.3 years from request to operation. GridCensus catalogs 100 MW of candidate capacity here.
Power & interconnection
Speed to power
Middle-of-the-pack interconnection conditions for this grid.
Connectivity
Site characteristics
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 Greenfield (UNKNOWN131292 - SPLIT ROCK) compare with other sites in Minnehaha County?
Greenfield (UNKNOWN131292 - SPLIT ROCK) ranks 81st of 95 scored candidate sites in Minnehaha County. Its 56.1/100 is roughly in line with the county average of 58.1. 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 fiber connectivity (92 vs 68) and its weakest is power availability (28 vs 39). Power and speed to power each carry 20% of the composite score, fiber 12%, water 7% and hazard 6%.
How close is Greenfield (UNKNOWN131292 - SPLIT ROCK) to power, fiber and other datacenters?
The nearest mapped substation, UNKNOWN131292, is the closest grid connection point on record and operates at 115 kV. The nearest located transmission bottleneck is Raun_Tekamho_161kV_ftlo_Raun_Ft_Cal_345kV (MISO), 92 miles away. For connectivity, the nearest internet exchange facility is TierPoint Sioux Falls - East at 2.4 miles. 8 fiber providers report service at the location in FCC broadband data. The closest operating datacenter on record is TierPoint Sioux Falls - East, 2.4 miles away.
What are the flood, water and hazard risks at Greenfield (UNKNOWN131292 - SPLIT ROCK)?
At the county level, FEMA's National Risk Index rates Minnehaha 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 Minnehaha County, ranked by DC Readiness.
| Site | Type | Voltage | Capacity | Queue wait | Score |
|---|---|---|---|---|---|
| SPLIT ROCK | Substation-Adjacent | 345 kV | 600 MW | 4.3 yrs | 67.7 |
| SIOUX FALLS | Substation-Adjacent | 230 kV | 300 MW | 4.3 yrs | 66.6 |
| EC Near Pathfinder | Greenfield | — | — | 4.3 yrs | 63.7 |
| OZ Minnehaha | Greenfield | — | — | 4.3 yrs | 63.5 |
| UNKNOWN131292 | Substation-Adjacent | 115 kV | 100 MW | 4.3 yrs | 62.6 |
| EC Near Pathfinder | Greenfield | — | — | 4.3 yrs | 62.5 |
| UNKNOWN158869 | Substation-Adjacent | 115 kV | 100 MW | 4.3 yrs | 62.5 |
| UNKNOWN131288 | Substation-Adjacent | 115 kV | 100 MW | 4.3 yrs | 62.4 |
Greenfield (UNKNOWN131292 - SPLIT ROCK): common questions
What is the DC Readiness score of Greenfield (UNKNOWN131292 - SPLIT ROCK)?
Greenfield (UNKNOWN131292 - SPLIT ROCK) scores 56.1/100 on the GridCensus DC Readiness scale, rated good. It ranks 81st of 95 scored sites in Minnehaha County. The Minnehaha County average is 58.1 and the South Dakota average is 54.7.
What is the nearest substation to Greenfield (UNKNOWN131292 - SPLIT ROCK)?
The nearest mapped substation is UNKNOWN131292, at 115 kV. GridCensus catalogs 100 MW of candidate capacity for the site.
Which electric utility serves Greenfield (UNKNOWN131292 - SPLIT ROCK)?
SIOUX VALLEY SW ELEC COOP (cooperative) holds the retail service territory that contains the site.
What grid region is Greenfield (UNKNOWN131292 - SPLIT ROCK) in?
Greenfield (UNKNOWN131292 - SPLIT ROCK) is in the MISO region. Projects interconnecting there have averaged a 4.3-year wait from queue request to operation.
How far is Greenfield (UNKNOWN131292 - SPLIT ROCK) from an internet exchange?
The nearest internet exchange facility is TierPoint Sioux Falls - East, about 2.4 miles away; 8 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 (UNKNOWN131292 - SPLIT ROCK), Minnehaha County, SD”, https://gridcensus.com/datacenter-sites/south-dakota/minnehaha-county/greenfield-unknown131292-split-rock-41c66113 (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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