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 | 90 | 0 | 0 |
| Tractors | 0 | 90 | 0 |
| Trailers | 0 | 90 | 0 |
| Total Power Units | 90 | ||
Distinct vehicles · 24 mo
vs 90 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 | 11 | — | 6.67% |
| Vehicle | 0 | 33 | — | 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 | 141 | 40 |
| Date | State | Vehicle | Violations | OOS |
|---|---|---|---|---|
| Sep 22, 2026 | AL | TRUCK TRACTOR | 0 | 0 |
| Sep 22, 2026 | OH | TRUCK TRACTOR | 3 | 1 |
| Sep 19, 2026 | SD | TRUCK TRACTOR | 0 | 0 |
| Sep 16, 2026 | OR | TRUCK TRACTOR | 0 | 0 |
| Sep 7, 2026 |
Carriers that share an officer, phone, or email with this DOT.
| Insp w/ Viol |
|---|
| Measure |
|---|
| Alert |
|---|
| Unsafe Driving | 25 | 3.29 | — |
| HOS Compliance | 14 | 0.38 | — |
| Vehicle Maintenance | 47 | 6.45 | — |
| Driver Fitness | 3 | 0.09 | — |
| Controlled Substances | 0 | 0.00 | — |
| 4.44% |
Where they run
Inspected in 38 states. Top state SD accounts for 8% of activity. Activity outside home state (WY): 100%.
+33 other states with fewer inspections
| 35 |
| Unsafe Driving | 27 | 13 | 0 |
| Hours-of-Service Compliance | 20 | 4 | 2 |
| Driver Fitness | 3 | 1 | 2 |
| WA |
| TRUCK TRACTOR |
| 1 |
| 0 |
| Sep 6, 2026 | AR | TRUCK TRACTOR | 0 | 0 |
| Sep 4, 2026 | NV | TRUCK TRACTOR | 1 | 0 |
| Sep 4, 2026 | SC | TRUCK TRACTOR | 0 | 0 |
| Sep 3, 2026 | LA | TRUCK TRACTOR | 1 | 0 |
| Sep 2, 2026 | MA | TRUCK TRACTOR | 0 | 0 |
| Date | Code | Description | BASIC | OOS |
|---|---|---|---|---|
| Sep 22, 2026 | 393100CC | Cargo - Cargo not secured against shifting | Vehicle Maintenance | — |
| Sep 22, 2026 | 393132CCHVE | Flattened/Crushed Vehicles - Improper securement of flattened or crushed vehicles. | Vehicle Maintenance | Yes |
| Sep 22, 2026 | 39375CTAOTDLT232 | Tires - Less than 2/32 inch tread depth | Vehicle Maintenance | — |
| Sep 7, 2026 | 3939ALTSIR | Lighting - Turn signal -Any inoperative on a unit that is not the rearmost unit | Vehicle Maintenance | — |
| Sep 4, 2026 | 3922SLLS4 | State/Local Laws - Speeding 15 or more miles per hour over the speed limit | Unsafe Driving | — |
| Sep 3, 2026 | 39222AD | Driver - Failed to activate hazard warning signal flashers | Unsafe Driving | — |
| Sep 2, 2026 | 39311A1LCHL | Lighting - Lamps improper color height location. | Vehicle Maintenance | — |
| Sep 2, 2026 | 39311BCSURR | Conspicuity Systems - Trailers upper rear retro reflective sheeting inadequate on vehicle manufactured on or after December 1 1993 | Vehicle Maintenance | — |
| Sep 2, 2026 | 39355EB | Air Brake - ABS malfunction lamp defective on trailers manufactured on or after March 1 1998 | Vehicle Maintenance | — |
| Sep 2, 2026 | 39378AWS | Washers - Inoperative washing system. | Vehicle Maintenance | — |