O'Brien Rock Company Inc is an active interstate carrier based in Saint Paul, KS.
No insurance filings on record.
View on FMCSA L&I| Vehicle Type | Owned | Term Leased | Trip Leased |
|---|---|---|---|
| Straight Trucks | 58 | 0 | 0 |
| Tractors | 14 | 0 | 0 |
| Trailers | 18 | 0 | 0 |
| Total Power Units | 72 | ||
Distinct vehicles · 24 mo
vs 72 self-reported (MCS-150)
Top makes
Registered in
Higher values = more violations. 0 = clean record.
| Category | Insp w/ Viol |
|---|
| Category | vs. Cohort | vs. State | Reading |
|---|---|---|---|
| Unsafe Driving | 80% | 92% | Worse than most peers |
| HOS Compliance | 0% | 0% | Better than most peers |
| Driver Fitness | 0% | 0% | Better than most peers |
| Controlled Substances | 0% | 0% | Better than most peers |
| Vehicle Maintenance | 77% | 89% | Worse than most peers |
Lower percentile = lower SMS measure = stronger safety record. Computed nightly across active carriers in the same state and fleet-size band.
| Type | Inspections | OOS | OOS % | Nat'l Avg |
|---|---|---|---|---|
| Driver | 0 | 0 | — | 6.67% |
| Vehicle | 0 | 2 | — | 22.26% |
| Hazmat | 0 | 0 | — |
| Period | Fatalities | Injuries | Tow-away | Total |
|---|---|---|---|---|
| Jan 1, 2025 | 0 | 1 | 1 | 1 |
| Oct 1, 2024 | 0 | 0 | 1 | 1 |
Most-cited violation codes
| BASIC Category | Total | Severe | OOS |
|---|---|---|---|
| Vehicle Maintenance | 14 | 3 |
| Date | State | Vehicle | Violations | OOS |
|---|---|---|---|---|
| Jan 13, 2026 | KS | TRUCK TRACTOR | 1 | 1 |
| Oct 23, 2025 | KS | TRUCK TRACTOR | 0 | 0 |
| Sep 30, 2025 | OK | STRAIGHT TRUCK | 1 | 0 |
| Sep 11, 2025 | MO | TRUCK TRACTOR | 1 | 0 |
| Measure |
|---|
| Alert |
|---|
| Unsafe Driving | 3 | 0.38 | — |
| HOS Compliance | 0 | 0.00 | — |
| Vehicle Maintenance | 6 | 6.40 | — |
| Driver Fitness | 0 | 0.00 | — |
| Controlled Substances | 0 | 0.00 | — |
| 4.44% |
Where they run
Inspected in 4 states. Top state KS accounts for 54% of activity. Activity outside home state (KS): 46%.
| 2 |
| Unsafe Driving | 3 | 1 | 0 |
| Apr 22, 2025 |
| AR |
| STRAIGHT TRUCK |
| 1 |
| 0 |
| Apr 16, 2025 | KS | STRAIGHT TRUCK | 0 | 0 |
| Feb 28, 2025 | KS | TRUCK TRACTOR | 3 | 0 |
| Feb 4, 2025 | KS | TRUCK TRACTOR | 0 | 0 |
| Jan 17, 2025 | AR | STRAIGHT TRUCK | 1 | 0 |
| Oct 21, 2024 | MO | TRUCK TRACTOR | 4 | 1 |
| Date | Code | Description | BASIC | OOS |
|---|---|---|---|---|
| Jan 13, 2026 | 39375GTAOW | Tires - All others weight carried exceeds tire load limit | Vehicle Maintenance | Yes |
| Sep 30, 2025 | 39378AWS | Washers - Inoperative washing system. | Vehicle Maintenance | — |
| Sep 11, 2025 | 39216D | Driver - Failed to use seat belt while operating a CMV | Unsafe Driving | — |
| Apr 22, 2025 | 3922SLIMPT | State/Local Laws - General impeding traffic. | Unsafe Driving | — |
| Feb 28, 2025 | 39345B2BAIR | Air Brake - Hose/tubing damaged or not secured | Vehicle Maintenance | — |
| Feb 28, 2025 | 3939ALCL | Lighting - Clearance lamp(s) inoperative | Vehicle Maintenance | — |
| Feb 28, 2025 | 3939ALSLI | Lighting - Stop lamps - Any inoperative. | Vehicle Maintenance | — |
| Jan 17, 2025 | 3939AHLLH | Lighting - Headlamp(s) fail to operate on low and high beam | Vehicle Maintenance | — |
| Oct 21, 2024 | 39343ATSV | Air Brake - Inoperable or missing trailer supply valve | Vehicle Maintenance | Yes |
| Oct 21, 2024 | 39345DB | Air Brake - Audible air leak at a proper connection | Vehicle Maintenance | — |