Mountain Line Inc is an active interstate carrier based in Rock Springs, WY.
No insurance filings on record.
View on FMCSA L&I| Vehicle Type | Owned | Term Leased | Trip Leased |
|---|---|---|---|
| Straight Trucks | 47 | 0 | 0 |
| Tractors | 1 | 46 | 0 |
| Trailers | 2 | 40 | 0 |
| Total Power Units | 47 | ||
Distinct vehicles · 24 mo
vs 47 self-reported (MCS-150)
Top makes
Registered in
Higher values = more violations. 0 = clean record.
| Category |
|---|
| Category | vs. Cohort | vs. State | Reading |
|---|---|---|---|
| Unsafe Driving | 100% | 99% | Worse than most peers |
| HOS Compliance | 87% | 95% | Worse than most peers |
| Driver Fitness | 73% | 96% | Around peer average |
| Controlled Substances | 0% | 0% | Better than most peers |
| Vehicle Maintenance | 53% | 90% | Around peer average |
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 | 4 | — | 6.67% |
| Vehicle | 0 | 21 | — | 22.26% |
| Hazmat | 0 | 0 | — |
| Period | Fatalities | Injuries | Tow-away | Total |
|---|---|---|---|---|
| Apr 1, 2025 | 0 | 0 | 1 | 1 |
| Jan 1, 2025 | 0 | 1 | 2 | 2 |
Most-cited violation codes
| BASIC Category | Total | Severe | OOS |
|---|---|---|---|
| Vehicle Maintenance | 104 | 27 | 23 |
| Date | State | Vehicle | Violations | OOS |
|---|---|---|---|---|
| Mar 20, 2026 | UT | TRUCK TRACTOR | 0 | 0 |
| Mar 18, 2026 | LA | TRUCK TRACTOR | 0 | 0 |
| Mar 18, 2026 | NM | TRUCK TRACTOR | 4 | 1 |
| Mar 12, 2026 | TX | TRUCK TRACTOR | 0 | 0 |
| Mar 8, 2026 |
| Insp w/ Viol |
|---|
| Measure |
|---|
| Alert |
|---|
| Unsafe Driving | 19 | 5.12 | — |
| HOS Compliance | 6 | 0.04 | — |
| Vehicle Maintenance | 36 | 6.91 | — |
| Driver Fitness | 2 | 0.05 | — |
| Controlled Substances | 0 | 0.00 | — |
| 4.44% |
Where they run
Inspected in 33 states. Top state SD accounts for 7% of activity. Activity outside home state (WY): 100%.
+28 other states with fewer inspections
| Unsafe Driving | 20 | 10 | 0 |
| Hours-of-Service Compliance | 7 | 0 | 0 |
| Driver Fitness | 2 | 1 | 1 |
| MO |
| TRUCK TRACTOR |
| 0 |
| 0 |
| Mar 6, 2026 | MA | TRUCK TRACTOR | 3 | 0 |
| Mar 3, 2026 | KS | TRUCK TRACTOR | 1 | 0 |
| Feb 21, 2026 | AL | TRUCK TRACTOR | 1 | 0 |
| Feb 19, 2026 | PA | TRUCK TRACTOR | 2 | 0 |
| Feb 15, 2026 | CA | TRUCK TRACTOR | 4 | 1 |
| Date | Code | Description | BASIC | OOS |
|---|---|---|---|---|
| Mar 18, 2026 | 39311 | No or defective lighting devices or reflective material as required | Vehicle Maintenance | — |
| Mar 18, 2026 | 39395A | No/discharged/unsecured fire extinguisher | Vehicle Maintenance | — |
| Mar 18, 2026 | 3939TS | Inoperative turn signal | Vehicle Maintenance | Yes |
| Mar 18, 2026 | 3969D2 | Failure to correct defects noted on previous inspection report | Vehicle Maintenance | — |
| Mar 6, 2026 | 3922SLLLR | State/Local Laws - Lane restriction violation | Unsafe Driving | — |
| Mar 6, 2026 | 3922SLLS4 | State/Local Laws - Speeding 15 or more miles per hour over the speed limit | Unsafe Driving | — |
| Mar 6, 2026 | 39524C2IIELDTN | HOS (ELD) - Driver failing to manually input or verify CMV trailer number. | Hours-of-Service Compliance | — |
| Mar 3, 2026 | 39375CTAOTDLT232 | Tires - Less than 2/32 inch tread depth | Vehicle Maintenance | — |
| Feb 21, 2026 | 3939ALIL | Lighting - Identification lamp(s) inoperative | Vehicle Maintenance | — |
| Feb 19, 2026 | 39378AWS | Washers - Inoperative washing system. | Vehicle Maintenance | — |