MOSSMAIN
Substation-AdjacentYellowstone County, Montana · WECC
At a glance
MOSSMAIN is a substation-adjacent datacenter candidate site in Yellowstone County, Montana, scoring 60.4/100 DC Readiness — 42nd of 140 scored sites in the county. Its nearest substation is MOSSMAIN (0 mi, 69 kV). It sits in the WECC grid region and the NORTHWESTERN ENERGY LLC - (MT) service territory, where interconnection has averaged 1.1 years from request to operation. GridCensus catalogs 50 MW of candidate capacity here.
Power & interconnection
Speed to power
Shorter queues and healthier completion here — a faster path to energization than the national norm.
Connectivity
Risk & environment
Location context
Regulatory climate
No notable statewide DC restriction on record; confirm local zoning and utility tariffs.
Incentive detail: New/expanding industry tax abatement available for DC construction.
Site location
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How does MOSSMAIN compare with other sites in Yellowstone County?
MOSSMAIN ranks 42nd of 140 scored candidate sites in Yellowstone County. Its 60.4/100 is roughly in line with the county average of 59.2. It is about 11% above the Montana average of 54.3 and about 14% above the national average of 53.2.
Against the Montana average, its strongest sub-score is fiber connectivity (80 vs 61) and its weakest is speed to power (63 vs 64). Power and speed to power each carry 20% of the composite score, fiber 12%, water 7% and hazard 6%.
How close is MOSSMAIN to power, fiber and other datacenters?
The nearest mapped substation, MOSSMAIN, is about 0 miles away and operates at 69 kV. For connectivity, the nearest internet exchange facility is Parsec at 5 miles. 13 fiber providers report service at the location in FCC broadband data. The closest operating datacenter on record is Parsec Data Management, 5 miles away.
What are the flood, water and hazard risks at MOSSMAIN?
At the county level, FEMA's National Risk Index rates Yellowstone County "Very 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 Yellowstone County, ranked by DC Readiness.
| Site | Type | Voltage | Capacity | Queue wait | Score |
|---|---|---|---|---|---|
| BILLINGS | Substation-Adjacent | 230 kV | 300 MW | 1.1 yrs | 67.4 |
| ALKALI CREEK | Substation-Adjacent | 230 kV | 300 MW | 1.1 yrs | 67.2 |
| SHOREY ROAD | Substation-Adjacent | 230 kV | 300 MW | 1.1 yrs | 67.1 |
| EC Coal Yellowstone County | Greenfield | — | — | 1.1 yrs | 66.9 |
| UNKNOWN202569 | Substation-Adjacent | 230 kV | 300 MW | 1.1 yrs | 66.8 |
| EC Near J E Corette Plant | Greenfield | — | — | 1.1 yrs | 66.7 |
| EC Near J E Corette Plant | Greenfield | — | — | 1.1 yrs | 66.0 |
| EC Near J E Corette Plant | Greenfield | — | — | 1.1 yrs | 65.2 |
MOSSMAIN: common questions
What is the DC Readiness score of MOSSMAIN?
MOSSMAIN scores 60.4/100 on the GridCensus DC Readiness scale, rated good. It ranks 42nd of 140 scored sites in Yellowstone County. The Yellowstone County average is 59.2 and the Montana average is 54.3.
What is the nearest substation to MOSSMAIN?
The nearest mapped substation is MOSSMAIN, about 0 miles away, at 69 kV. GridCensus catalogs 50 MW of candidate capacity for the site.
Which electric utility serves MOSSMAIN?
NORTHWESTERN ENERGY LLC - (MT) (investor owned) holds the retail service territory that contains the site; its holding company is NORTHWESTERN ENERGY.
What grid region is MOSSMAIN in?
MOSSMAIN is in the WECC region. Projects interconnecting there have averaged a 1.1-year wait from queue request to operation.
How far is MOSSMAIN from an internet exchange?
The nearest internet exchange facility is Parsec, about 5 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, “MOSSMAIN, Yellowstone County, MT”, https://gridcensus.com/datacenter-sites/montana/yellowstone-county/mossmain-936e7695 (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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