4j Well Service Inc is an active interstate carrier based in Baker, MT.
No insurance filings on record.
View on FMCSA L&I| Vehicle Type | Owned | Term Leased | Trip Leased |
|---|---|---|---|
| Straight Trucks | 7 | 0 | 0 |
| Tractors | 7 | 0 | 0 |
| Trailers | 7 | 0 | 0 |
| Total Power Units | 7 | ||
Distinct vehicles · 24 mo
vs 7 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 | 0% | 0% | Better than most peers |
| HOS Compliance | 0% | 0% | Better than most peers |
| Driver Fitness | 89% | 95% | Worse than most peers |
| Controlled Substances | 0% | 0% | Better than most peers |
| Vehicle Maintenance | 87% | 93% | 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 | 4 | — | 22.26% |
| Hazmat | 0 | 0 | — | 4.44% |
| Period | Fatalities | Injuries | Tow-away | Total |
|---|---|---|---|---|
| No crashes recorded | 0 | 0 | 0 | 0 |
Most-cited violation codes
| BASIC Category | Total | Severe | OOS |
|---|---|---|---|
| Vehicle Maintenance | 22 | 5 | 6 |
| Date | State | Vehicle | Violations | OOS |
|---|---|---|---|---|
| Sep 24, 2025 | MT | TRUCK TRACTOR | 2 | 0 |
| Jul 27, 2025 | MT | STRAIGHT TRUCK | 0 | 0 |
| May 8, 2025 | MT | STRAIGHT TRUCK | 3 | 2 |
| Sep 12, 2024 | MT | TRUCK TRACTOR | 7 | 2 |
| Measure |
|---|
| Alert |
|---|
| Unsafe Driving | 0 | 0.00 | — |
| HOS Compliance | 0 | 0.00 | — |
| Vehicle Maintenance | 6 | 10.45 | — |
| Driver Fitness | 1 | 0.66 | — |
| Controlled Substances | 0 | 0.00 | — |
Where they run
Inspected in 2 states. Top state MT accounts for 89% of activity. Activity outside home state (MT): 11%.
| Driver Fitness | 1 | 1 | 0 |
| Aug 26, 2024 | MT | TRUCK TRACTOR | 1 | 0 |
| Jul 16, 2024 | SD | STRAIGHT TRUCK | 0 | 0 |
| May 30, 2024 | MT | TRUCK TRACTOR | 7 | 2 |
| May 14, 2024 | MT | TRUCK TRACTOR | 3 | 0 |
| Mar 27, 2024 | MT | TRUCK TRACTOR | 0 | 0 |
| Date | Code | Description | BASIC | OOS |
|---|---|---|---|---|
| Sep 24, 2025 | 39345DB | Air Brake - Audible air leak at a proper connection | Vehicle Maintenance | — |
| Sep 24, 2025 | 3939ALFTSI | Lighting - Front - Turn signal - inoperative | Vehicle Maintenance | — |
| May 8, 2025 | 3929A2C | Cargo - Vehicle components or dunnage not secured | Vehicle Maintenance | Yes |
| May 8, 2025 | 393209DSTGBL | Steering - Gear box mounting bolt loose | Vehicle Maintenance | Yes |
| May 8, 2025 | 39395A1 | Emergency Equipment - Fire Extinguishers - no fire extinguisher present or not properly rated. | Vehicle Maintenance | — |
| Sep 12, 2024 | 38351ALCDLRSWD | License (CDL) - A person required to have a CLP or CDL who is disqualified must not drive a CMV | Driver Fitness | — |
| Sep 12, 2024 | 393201AFRMC | Frame - Cracked/loose/broken frame member affecting support of functional components | Vehicle Maintenance | Yes |
| Sep 12, 2024 | 39345DBAAL | Air Brake - Audible air leak at other than a proper connection | Vehicle Maintenance | Yes |
| Sep 12, 2024 | 39347E | Brake Out of Adjustment - Roto Clamp (Short & Long) DD-3 or Bolt | Vehicle Maintenance | — |
| Sep 12, 2024 | 39353BB | Air Brake - CMV manufactured on or after 10/20/1994 has an automatic airbrake adjustment system that fails to compensate for wear | Vehicle Maintenance | — |