Data / Carriers / North Dakota / Cos LLC
Cos LLC, Williston, ND: USDOT 2496282, 20 power units, 8 inspections, 3 crashes
Cos LLC (USDOT 2496282) is an interstate carrier in Williston, ND, registered with FMCSA with 20 power units and 19 drivers as it reports them. FMCSA recorded 8 roadside inspections from November 7, 2024 to November 7, 2026, the latest on April 18, 2026. Its vehicle out of service rate was 66.7% against 22.9% for all carriers (4 of 6 vehicle inspections). The states reported 3 crashes in the same period, with 0 deaths and 2 injuries.
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- USDOT number
- 2496282
- Also does business as
- Castle Oilfield Services
- Location
- 501 48TH Ave W, Williston, ND 58801
- Phone
- (701) 572 1832
- Operation
- Interstate; for hire
- Docket
- MC 1376430
- Operating authority
- Active common carrier authority for property
- Liability insurance on file
- $1,000,000 (bodily injury and property damage)
- Power units
- 20
- Drivers
- 19 (14 with a commercial licence)
- Miles reported
- 251,164 in 2025
- Cargo carried
- Liquids and gases, Oil field equipment
- Compliance review rating
- Satisfactory (April 3, 2026)
- Last registration update
- January 29, 2026
- In the FMCSA register since
- April 16, 2014
- FMCSA safety measurement page
- ai.fmcsa.dot.gov
Inspections and out of service rates
Roadside inspections from November 7, 2024 to November 7, 2026. The national rate is the rate across every carrier in the same window.
| Measure | Inspections | Out of service | Rate | National rate | Against national |
|---|---|---|---|---|---|
| Vehicle inspections | 6 | 4 | 66.7% | 22.9% | 43.8 points above the national rate |
| Driver inspections | 8 | 4 | 50% | 6.3% | 43.7 points above the national rate |
| All inspections, any out of service order | 8 | 5 | 62.5% | 19.4% |
Crashes
3 crashes reported from November 7, 2024 to November 7, 2026.
| Date | City | State | Deaths | Injuries | Towed away |
|---|---|---|---|---|---|
| May 17, 2026 | ND | 0 | 1 | Yes | |
| April 15, 2026 | I-94 | MT | 0 | 0 | Yes |
| November 18, 2025 | ND | 0 | 1 | Yes |
The carrier's full record on the FMCSA safety measurement page
Also on SpecStream
- Carriers in North Dakota
- Carriers in Williston, ND
- Liquids and gases carriers in North Dakota
- Oil field equipment carriers in North Dakota
Updated November 7, 2026. Read from US Department of Transportation, FMCSA Motor Carrier Census, Inspection, Crash and Licensing files. Public domain (U.S. government work). Inspection and crash counts cover November 7, 2024 to November 7, 2026. Fleet size, drivers, cargo and operation are as each carrier reports them to FMCSA and can be out of date. A vehicle or driver out of service order means an inspector ordered the vehicle or driver off the road until the problem was fixed. The national rate comes from every inspection in the same window. Crashes are those state police reported to FMCSA and are not a finding of fault. This page uses US Department of Transportation data and is not endorsed or certified by the Department of Transportation or FMCSA. Free to reuse with credit to SpecStream under CC BY 4.0. Spot a wrong value? Write to [email protected] with the link to this page.