COS LLC
DBA CASTLE OILFIELD SERVICES
USDOT 2496282MC-Docket MC1376430WILLISTON, ND
Review before tendering20 power units
COS LLC (USDOT 2496282) in WILLISTON, ND — has findings to review before tendering. FMCSA authority, fleet size, BASIC safety measures, crash and inspection history.
- Has active operating authority that's tenderable today (common or contract).
- No pending authority revocation.
- Not under an uncleared federal out-of-service or safety action.
- BIPD on file: $1,000,000.
- No cargo insurance on file. Required for many shipper contracts.
- No history of insurance lapses.
- Satisfactory safety rating.
- BASIC alert flagged in: Driver Fitness.
- Driver and vehicle out-of-service rate is above the national roadside average.
- 2 preventable crash(es) in the last 24 months; recordable crash rate 0.
- No fatal crashes in the last 24 months.
- No link to a prior revoked authority.
- 1 other active carrier(s) operate from this exact street + ZIP. High counts are often legitimate registered-agent / virtual-office addresses — treat as context, not a verdict.
- FMCSA compliance review on file dated 2026-02-20 (C).
- Crash Indicator and Hazmat Compliance BASICs are statutorily withheld from public SMS under the FAST Act — their absence is not a clean record; use the crash-risk signals above instead.
Built from FMCSA's public Safety Management System data — guidance, not legal advice. Verify directly with the carrier and your cargo policy before tendering.
Authority
- Common authority
- Active
- Contract authority
- Not applicable
Safety & BASIC scorecard
BASIC safety measures
Unsafe driving
No alert
measure 0.86
Hours of service
No alert
measure 1.23
Driver fitness
ALERT
measure 2.23
Controlled substance
No alert
measure 0
Vehicle maintenance
No alert
measure 18.42
Under the FAST Act, FMCSA publishes an absolute per-category measure (not a 0–100 percentile) for these five BASICs — the alert flag, not the raw number, is the risk signal. The Crash Indicator and Hazmat Compliance BASICs are statutorily withheld from public view.
Last 24 months
0
Fatalities
1
Injuries
2
Crashes
13
Inspections
8
OOS inspections
29
OOS violations
Insurance
- BIPD on file
- $1,000,000
- Cargo insurance
- No
- Bond on file
- No
Fleet
- Power units
- 20
- Total drivers
- 19
- Years in business
- 12
- Hazmat authority
- No
Crash risk
- Preventable crashes (24 mo)
- 2 of 2 total crash(es)
- Recordable crash rate
- 0
- Driver OOS rate
- 40%Above national
- Vehicle OOS rate
- 66.7%Above national
The official Crash Indicator BASIC is withheld from public SMS under the FAST Act — these derived signals stand in for it; their absence is not a clean record.
Compliance & history
- Reincarnation / chameleon
- No prior revoked authority
- Involuntary revocations
- None on file
- Physical address
- 1 other carrier(s) at this address
- Federal OOS / safety action
- None on file
- MCS-150 self-report
- 2026-01-29
- Insurance lapse history
- No lapses on record
- Last compliance review
- 2026-02-20 · C
Inspection history (all-time)
20
Inspections
10
OOS inspections
115
Violations
31
OOS violations
3
Post-accident
Record spans 2023-07-19 → 2026-04-18.
Crash history (last 24 months)
2025-11-18
ND
1 injuredTow-away
2024-07-29
ND
Tow-away
Violation pattern (all-time, by area)
| Area (49 CFR part) | Violations | Out of service | Most recent |
|---|---|---|---|
Vehicle parts & maintenance 393
|
54 | 17 | 2026-04-18 |
Vehicle inspection & repair 396
|
16 | 6 | 2026-04-18 |
Unsafe driving 392
|
16 | 1 | 2025-02-24 |
General safety regulations 390
|
5 | 0 | 2025-02-01 |
Driver qualifications 391
|
4 | 1 | 2025-02-01 |
Hours of service 395
|
3 | 3 | 2025-02-01 |
CDL standards 383
|
2 | 2 | 2025-02-01 |
Recent violations (last 24 months, worst first)
| Date | Category | Violation | OOS |
|---|---|---|---|
| 2026-04-18 | Vehicle Maintenance | Tires - All others leaking or inflation less than 50% of the maximum inflation pressure on tire not equipped with ATIS | OOS |
| 2026-04-18 | Vehicle Maintenance | Suspension - U-bolt u-bolt bottom plate or other axle clamp bolt loose/cracked/broken/missing. | OOS |
| 2026-04-18 | Vehicle Maintenance | Suspension - Deflated air suspension | OOS |
| 2026-04-18 | Vehicle Maintenance | Tires - Less than 2/32 inch tread depth | — |
| 2026-04-18 | Vehicle Maintenance | Suspension - Leaking 3 PSI in 5 minutes | — |
| 2026-04-18 | Vehicle Maintenance | Suspension - Axle positioning part cracked/broken/loose/missing. | — |
| 2026-04-18 | Vehicle Maintenance | Air Brake - Fails air loss rate test | OOS |
| 2026-04-18 | Vehicle Maintenance | Lighting - Backup lamp inoperative | — |
| 2026-04-18 | Vehicle Maintenance | Operating a CMV without documentation of a periodic inspection | — |
| 2026-04-18 | Vehicle Maintenance | Air Brake - Audible air leak at a proper connection | — |
| 2026-04-18 | Vehicle Maintenance | Brake Out of Adjustment - Roto Clamp (Short & Long) DD-3 or Bolt | — |
| 2026-04-18 | Vehicle Maintenance | Drum Brake - Inoperative other than a steering axle | — |
| 2026-04-18 | Vehicle Maintenance | Air Brake - CMV manufactured on or after 10/20/1994 has an automatic airbrake adjustment system that fails to compensate | — |
| 2026-04-18 | Vehicle Maintenance | Brake - Defective brake(s) are equal to or greater than 20% of the service brakes on the vehicle/combination | OOS |
| 2025-04-09 | Vehicle Maintenance | Lighting - Headlamp(s) fail to operate on low and high beam | — |
| 2025-04-09 | Vehicle Maintenance | Lighting - Identification lamp(s) inoperative | — |
| 2025-02-01 | Driver Fitness | License (CDL) - Operate a CMV and does not possess a valid CDL | OOS |
| 2025-02-01 | Vehicle Maintenance | Steering - Gear box mounting bolt loose | OOS |
| 2025-02-01 | Vehicle Maintenance | Lighting - Stop lamps - Both inoperative when required to be on | OOS |
| 2025-02-01 | Vehicle Maintenance | Lighting - Turn signal - Any inoperative on the rearmost vehicle. | OOS |
| 2025-02-01 | Hours-of-Service Compliance | HOS (Property) - Failing to have a record of duty status using the method prescribed | OOS |
| 2025-02-01 | Hours-of-Service Compliance | HOS (Property) - Failing to have a record of duty status using the method prescribed | OOS |
| 2025-02-01 | Hours-of-Service Compliance | HOS (Property) - Failing to have a record of duty status using the method prescribed | OOS |
| 2025-02-01 | Vehicle Maintenance | Lighting - Tail lamp - Any inoperative | — |
| 2025-02-01 | Vehicle Maintenance | Lighting - Headlamp(s) - Any inoperative | — |
| 2025-02-01 | Vehicle Maintenance | Brake - Missing or inoperable breakaway braking system on a trailer(s) or converter dolly | OOS |
| 2025-02-01 | Vehicle Maintenance | Brake - Missing or inoperable breakaway braking system on a trailer(s) or converter dolly | OOS |
| 2025-02-01 | Vehicle Maintenance | Brake - Breakaway not attached to the towing vehicle | OOS |
| 2025-02-01 | Vehicle Maintenance | Coupling - Trailer safety devices wire/chain damaged. | OOS |
| 2025-02-01 | Vehicle Maintenance | Fuel - Dripping leak. | OOS |
| 2025-02-01 | Unsafe Driving | State/Local Laws - Failed to obey a traffic control device - Permanent or Temporary - e.g. safety official signal sign l | — |
| 2025-02-01 | Unsafe Driving | State/Local Laws - Failed to obey a traffic control device - Permanent or Temporary - e.g. safety official signal sign l | — |
| 2025-02-01 | Vehicle Maintenance | Tires - All others weight carried exceeds tire load limit | OOS |
| 2025-02-01 | Vehicle Maintenance | Tires - Front weight carried exceeds tire load limit | OOS |
| 2025-02-01 | Vehicle Maintenance | Air Brake - Audible air leak at a proper connection | — |
| 2025-02-01 | Vehicle Maintenance | Operating a CMV without documentation of a periodic inspection | — |
| 2025-02-01 | Vehicle Maintenance | Hubs - Bearing cap plug or filler plug missing or broken | OOS |
| 2025-02-01 | Vehicle Maintenance | Operating a CMV without documentation of a periodic inspection | — |
| 2025-02-01 | Vehicle Maintenance | Operating a CMV without documentation of a periodic inspection | — |
| 2025-02-01 | Vehicle Maintenance | Hydraulic/Electric Brake - Inoperative other than a steering axle. | — |
| 2025-02-01 | Vehicle Maintenance | Hydraulic/Electric Brake - Inoperative other than a steering axle. | — |
| 2025-02-01 | Vehicle Maintenance | Lubrication - Oil or grease leak | — |
| 2025-02-01 | Vehicle Maintenance | Cargo - Vehicle components or dunnage not secured | OOS |
| 2025-02-01 | Vehicle Maintenance | Frame - Cracked/loose/sagging/broken frame or chassis | — |
| 2025-02-01 | Vehicle Maintenance | Seatbelts - Drivers seatbelt or passenger seatbelt (if equipped) - missing or defective | — |
| 2025-02-01 | Vehicle Maintenance | Emergency Equipment - Fire Extinguishers - no fire extinguisher present or not properly rated. | — |
| 2025-02-01 | Vehicle Maintenance | Emergency Equipment - Stopped vehicle warning devices missing or improper | — |
| 2025-02-01 | Vehicle Maintenance | Emergency Equipment - Fire Extinguishers - no fire extinguisher present or not properly rated. | — |
| 2025-02-01 | Vehicle Maintenance | Brake - Defective brake(s) are equal to or greater than 20% of the service brakes on the vehicle/combination | OOS |
| 2025-02-01 | Vehicle Maintenance | Brake - Defective brake(s) are equal to or greater than 20% of the service brakes on the vehicle/combination | OOS |
Recent inspections (with violations, newest first)
Showing the 14 most-recent inspections that had violations. Clean inspections aren't listed here — they're counted in the all-time inspection totals above.
2026-04-18 17 viols· 5 OOS
| Area (part) | Section | OOS | Citation |
|---|---|---|---|
| Vehicle parts & maintenance 393 | 207F-SDAS | OOS | — |
| Vehicle parts & maintenance 393 | 207A-SAPPCBLM | — | — |
| Vehicle inspection & repair 396 | 17C-PI | — | — |
| Vehicle parts & maintenance 393 | 9A-LBL | — | — |
| Vehicle parts & maintenance 393 | 75C-TAOTD-LT2/32 | — | — |
| Vehicle parts & maintenance 393 | 207A-SAPPCBLM | — | — |
| Vehicle parts & maintenance 393 | 207A-SAPPCBLM | — | — |
| Vehicle parts & maintenance 393 | 207A-SUBL | OOS | — |
| Vehicle parts & maintenance 393 | 207F-SLAS | — | — |
| Vehicle parts & maintenance 393 | 45D-B | — | — |
| Vehicle parts & maintenance 393 | 48A-BIBD | — | — |
| Vehicle parts & maintenance 393 | 47E | — | — |
| Vehicle parts & maintenance 393 | 48A-BIBD | — | — |
| Vehicle parts & maintenance 393 | 53B-B | — | — |
| Vehicle parts & maintenance 393 | 75A3-TAOL | OOS | — |
| Vehicle inspection & repair 396 | 3A1-BALR | OOS | — |
| Vehicle inspection & repair 396 | 3A1-BOS | OOS | — |
2025-04-09 2 viols
| Area (part) | Section | OOS | Citation |
|---|---|---|---|
| Vehicle parts & maintenance 393 | 9A-HLLH | — | — |
| Vehicle parts & maintenance 393 | 9A-LIL | — | — |
2025-02-24 1 viol
| Area (part) | Section | OOS | Citation |
|---|---|---|---|
| Unsafe driving 392 | 2-SLLEWA2 | — | — |
2025-02-01 15 viols· 5 OOS
| Area (part) | Section | OOS | Citation |
|---|---|---|---|
| Hours of service 395 | 8A1-HOSP | OOS | — |
| Unsafe driving 392 | 2-SLLTCD | — | — |
| Vehicle parts & maintenance 393 | 60D | — | — |
| Vehicle inspection & repair 396 | 17C-PI | — | — |
| Vehicle parts & maintenance 393 | 95A1 | — | — |
| Vehicle inspection & repair 396 | 3A1-BOS | OOS | — |
| General safety regulations 390 | 21TB2-DOT | — | — |
| Vehicle parts & maintenance 393 | 43DBMA | OOS | — |
| Vehicle parts & maintenance 393 | 43D-B | OOS | — |
| Vehicle parts & maintenance 393 | 48A-BIHE | — | — |
| Vehicle inspection & repair 396 | 17C-PI | — | — |
| Vehicle inspection & repair 396 | 3A1-HCM | OOS | — |
| Vehicle parts & maintenance 393 | 9A-LRLI | — | — |
| Unsafe driving 392 | 2-SLLSR | — | — |
| Unsafe driving 392 | 2-SLL | — | — |
2025-02-01 11 viols· 4 OOS
| Area (part) | Section | OOS | Citation |
|---|---|---|---|
| Driver qualifications 391 | 41A-MCPC | — | — |
| Hours of service 395 | 8A1-HOSP | OOS | — |
| Vehicle inspection & repair 396 | 17C-PI | — | — |
| Vehicle parts & maintenance 393 | 95A1 | — | — |
| General safety regulations 390 | 21TB2-DOT | — | — |
| Vehicle inspection & repair 396 | 3A1-BOS | OOS | — |
| Vehicle parts & maintenance 393 | 43D-B | OOS | — |
| Vehicle parts & maintenance 393 | 48A-BIHE | — | — |
| Vehicle parts & maintenance 393 | 70D-CDTSDD | OOS | — |
| Unsafe driving 392 | 2-SLLSR | — | — |
| Vehicle inspection & repair 396 | 17C-PI | — | — |
2025-02-01 27 viols· 9 OOS
| Area (part) | Section | OOS | Citation |
|---|---|---|---|
| Driver qualifications 391 | 41A-MCPC | — | — |
| Hours of service 395 | 8A1-HOSP | OOS | — |
| Unsafe driving 392 | 2-SLLEWA3 | — | — |
| Unsafe driving 392 | 2-SLLEWA3 | — | — |
| Unsafe driving 392 | 2-SLLEWG3 | — | — |
| Unsafe driving 392 | 2-SLLED | — | — |
| Unsafe driving 392 | 2-SLLTCD | — | — |
| CDL standards 383 | 23A2-LCDLN | OOS | — |
| General safety regulations 390 | 21TB2-DOT | — | — |
| Vehicle inspection & repair 396 | 17C-PI | — | — |
| Vehicle parts & maintenance 393 | 9A-LSLIWR | OOS | — |
| Vehicle parts & maintenance 393 | 9A-LTSI | OOS | — |
| Vehicle parts & maintenance 393 | 9A-LHLI | — | — |
| Vehicle parts & maintenance 393 | 78 | — | — |
| Unsafe driving 392 | 2-SLLIRP | — | — |
| Unsafe driving 392 | 2-SLLIFTA | — | — |
| Unsafe driving 392 | 9A2-C | OOS | — |
| Vehicle inspection & repair 396 | 5B-L | — | — |
| Vehicle parts & maintenance 393 | 201A-FRCLS | — | — |
| Vehicle parts & maintenance 393 | 209D-STGBL | OOS | — |
| Vehicle parts & maintenance 393 | 45D-B | — | — |
| Vehicle parts & maintenance 393 | 75G-TFWETL | OOS | — |
| Vehicle parts & maintenance 393 | 75G-TAOW | OOS | — |
| Vehicle parts & maintenance 393 | 95A1 | — | — |
| Vehicle parts & maintenance 393 | 95F | — | — |
| Vehicle parts & maintenance 393 | 93A-SBA | — | — |
| Vehicle inspection & repair 396 | 3A1-F | OOS | — |
2024-12-03 1 viol· 1 OOS
| Area (part) | Section | OOS | Citation |
|---|---|---|---|
| Driver qualifications 391 | 11B5-LNCDLNVL | OOS | — |
2024-07-26 1 viol
| Area (part) | Section | OOS | Citation |
|---|---|---|---|
| Vehicle parts & maintenance 393 | 55(d)(2) | — | — |
2024-07-09 9 viols· 3 OOS
| Area (part) | Section | OOS | Citation |
|---|---|---|---|
| CDL standards 383 | 23(a)(2) | OOS | — |
| General safety regulations 390 | 21(a) | — | — |
| Vehicle parts & maintenance 393 | 23 | OOS | — |
| Vehicle parts & maintenance 393 | 43(d) | OOS | — |
| Vehicle parts & maintenance 393 | 78 | — | — |
| Vehicle parts & maintenance 393 | 95(a) | — | — |
| Vehicle parts & maintenance 393 | 95(f) | — | — |
| Vehicle inspection & repair 396 | 17(c) | — | — |
| Vehicle inspection & repair 396 | 17(c) | — | — |
2024-06-24 1 viol· 1 OOS
| Area (part) | Section | OOS | Citation |
|---|---|---|---|
| Vehicle parts & maintenance 393 | 75(a)(3) | OOS | — |
2024-06-03 5 viols· 1 OOS
| Area (part) | Section | OOS | Citation |
|---|---|---|---|
| Vehicle parts & maintenance 393 | 53(b) | — | — |
| Vehicle parts & maintenance 393 | 47(e) | — | — |
| Vehicle parts & maintenance 393 | 45(b)(2) | — | — |
| Vehicle parts & maintenance 393 | 45(a) | OOS | — |
| Vehicle parts & maintenance 393 | 55(c)(2) | — | — |
2024-05-16 8 viols· 1 OOS
| Area (part) | Section | OOS | Citation |
|---|---|---|---|
| Vehicle inspection & repair 396 | 17(c) | — | — |
| General safety regulations 390 | 21T(b)(2) | — | — |
| Driver qualifications 391 | 41(a) | — | — |
| Unsafe driving 392 | 2 | — | — |
| Vehicle parts & maintenance 393 | 205(c) | — | — |
| Vehicle parts & maintenance 393 | 51(c) | — | — |
| Vehicle parts & maintenance 393 | 75(a)(3) | OOS | — |
| Vehicle parts & maintenance 393 | 95(a)(4) | — | — |
2024-01-06 1 viol
| Area (part) | Section | OOS | Citation |
|---|---|---|---|
| Unsafe driving 392 | 2 | — | — |
2023-08-16 1 viol
| Area (part) | Section | OOS | Citation |
|---|---|---|---|
| Unsafe driving 392 | 2 | — | — |
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