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Trucking Companies in Petroleum County
Active motor carriers whose principal place of business is in Petroleum County, Montana.
- Active carriers
- 11
- Power units
- 27
- Trucks and tractors reported
- Drivers
- 22
- Interstate carriers
- 3
Carriers in Petroleum County
Share of active carriers
- For hire (carry goods for others)327.3%
- Private (carry their own goods)1090.9%
- Passenger carriers00.0%
- Hazardous materials218.2%
Fleet size (power units)
- None reported00.0%
- 1436.4%
- 2 to 5654.5%
- 6 to 1019.1%
- 11 to 5000.0%
- 51 to 10000.0%
- More than 10000.0%
Fleet and driver counts are self-reported by each company on FMCSA Form MCS-150 and can be out of date. Values that look like typing errors (for example 99,999 trucks for a small company) are treated as not reported. Pages list companies registered as businesses; owner-operators registered as individuals are counted in totals but not named.
Largest carriers in Petroleum County
Swipe the table sideways to see more columns.
| # | Company | Power units | Drivers | Type |
|---|---|---|---|---|
| 1 | Flat Willow Farm LLCUSDOT 3291805 | 7 | 3 | Private |
| 2 | Weller Farm Services IncUSDOT 4016140 | 3 | 3 | For hire |
| 3 | K & L Excavation LLCUSDOT 3607887 | 2 | 1 | For hire |
| 4 | Zimmerman AG & Cattle Co LLCUSDOT 2138849 | 1 | 1 | Private |
| 5 | Winnett Transportation Services LLCUSDOT 4166544 | 1 | 1 | For hire |
Frequently asked questions
- What is a USDOT number?
- The U.S. Department of Transportation number identifies a company that operates commercial vehicles hauling cargo or passengers in interstate commerce, and in many states for trips within the state too.
- What is a MC number?
- An MC (motor carrier) number is the operating authority FMCSA grants to for-hire carriers that move regulated goods or passengers across state lines. Private carriers hauling their own goods do not need one.
- What do the safety ratings mean?
- FMCSA rates a carrier Satisfactory, Conditional or Unsatisfactory after an on-site compliance review. Most carriers have never had a review and are unrated, which does not mean they are unsafe.
Source: Federal Motor Carrier Safety Administration, Company Census File · Last updated 10/22/2026