Datacenter Sites in Petroleum County, Montana
Petroleum County has 7 scored datacenter candidate sites averaging 51.1/100 DC Readiness, with a catalogued aggregate of 150 MW. FEMA rates local natural-hazard risk as "Very Low". The county has a datacenter tax incentive on record.
At a glance
Petroleum County, Montana has 7 scored datacenter candidate sites averaging 51.1/100 DC Readiness, roughly in line with the Montana average of 54.3. It ranks 52nd of 55 Montana counties by number of sites and 54th by average score. The top-scoring site is EC Coal Petroleum County at 54.4/100.
Site-selection context for Petroleum County
Incentive detail: New/expanding industry tax abatement available for DC construction.
How does Petroleum County compare with other counties in Montana?
By number of scored sites, Petroleum County ranks 52nd of the 55 Montana counties with a county page, holding 0.3% of the state's 2,542 sites. Its average DC Readiness of 51.1/100 ranks 54th in the state and is roughly in line with the national average of 53.0. Nationally it has the 2670th-largest site inventory of 2,964 counties with five or more sites. 0 sites score 70 or higher and 0 score 55 or higher.
What types of datacenter sites are in Petroleum County?
Substation-Adjacent sites are the most common (3, 43% of the county's inventory), followed by industrial (2) and greenfield (1). Site type reflects how the parcel was identified — next to a substation, on a former mine or brownfield, on industrial or federal excess land — and is scored on the same 14 factors either way.
What are power cost, hazard, water and fiber conditions in Petroleum County?
Industrial electricity averages 14.57¢/kWh and commercial 8.99¢/kWh. FEMA's National Risk Index rates the county "Very Low" (12). WRI water stress is medium-high. 1 fiber providers report service in the county. The climate runs 400 cooling degree days a year with a mean temperature of 42°F. Land is valued around $1,059 an acre.
By site type
Top datacenter sites in Petroleum County
| Site | Type | Voltage | Capacity | Queue wait | Score |
|---|---|---|---|---|---|
| EC Coal Petroleum County | Greenfield | — | — | 1.1 yrs | 54.4 |
| UNKNOWN208455 | Substation-Adjacent | 69 kV | 50 MW | 1.1 yrs | 52.7 |
| UNKNOWN208453 | Substation-Adjacent | 69 kV | 50 MW | 1.1 yrs | 52.7 |
| UNKNOWN208458 | Substation-Adjacent | 69 kV | 50 MW | 1.1 yrs | 52.7 |
| Kozy Korner | Industrial | — | — | 1.1 yrs | 48.7 |
| Petroleum County Community Center | Industrial | — | — | 1.1 yrs | 48.7 |
| Mine Site | Former Mine | — | — | 1.1 yrs | 48.0 |
Every scored site in Petroleum County
All 7 sites, best first.
- EC Coal Petroleum County · 54.4
- Substation-Adjacent site · 1ab044e6 · 52.7
- Substation-Adjacent site · 291f34e8 · 52.7
- Substation-Adjacent site · bc3b0e97 · 52.7
- Kozy Korner · 48.7
- Petroleum County Community Center · 48.7
- Mine Site · a98a101d · 48.0
Petroleum County datacenter FAQ
How many datacenter sites are in Petroleum County?
7 scored datacenter candidate sites, averaging 51.1/100 DC Readiness. That is the 52nd-most of 55 Montana counties with five or more sites.
What is the highest-scoring datacenter site in Petroleum County?
EC Coal Petroleum County scores 54.4/100 DC Readiness, the highest of the 7 scored sites in Petroleum County (a greenfield site).
Does Petroleum County offer datacenter tax incentives?
New/expanding industry tax abatement available for DC construction.
What is the natural-hazard risk in Petroleum County?
FEMA's National Risk Index rates Petroleum County as "Very Low" (score 12).
What are industrial electricity rates in Petroleum County?
Average industrial electricity is 14.57¢/kWh and commercial is 8.99¢/kWh in Petroleum County.
More in Montana
- All datacenter sites in Montana· 2,542 sites
- Operating datacenters in Montana
- Electric substations in Montana
- Broadwater County· 144 sites · avg 52.1
- Yellowstone County· 140 sites · avg 59.2
- Flathead County· 121 sites · avg 52.4
- Cascade County· 114 sites · avg 53.3
- Missoula County· 107 sites · avg 57.3
- Richland County· 107 sites · avg 54.7
- Substation-Adjacent sites in Montana
- Industrial sites in Montana
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 November 12, 2026 — GridCensus refreshes it monthly. See the methodology for how records are matched, cleaned and scored.
Cite as: GridCensus, “Datacenter candidate sites in Petroleum County, Montana”, https://gridcensus.com/datacenter-sites/montana/petroleum-county (data as of November 12, 2026).
Dataset updated . Screening estimates derived from public data sources.
Go deeper than the public screen
Every site and score for Petroleum County, Montana 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.