Mountainside Power Llc is an active interstate carrier based in Afton, WY.
No insurance filings on record.
View on FMCSA L&I| Vehicle Type | Owned | Term Leased | Trip Leased |
|---|---|---|---|
| Straight Trucks | 20 | 0 | 0 |
| Tractors | 2 | 0 | 0 |
| Total Power Units | 22 | ||
Distinct vehicles · 24 mo
vs 22 self-reported (MCS-150)
Top makes
Registered in
Higher values = more violations. 0 = clean record.
| Category |
|---|
| Category | vs. Cohort | vs. State | Reading |
|---|---|---|---|
| Unsafe Driving | 97% | 96% | Worse than most peers |
| HOS Compliance | 90% | 98% | Worse than most peers |
| Driver Fitness | 97% | 98% | Worse than most peers |
| Controlled Substances | 0% | 0% | Better than most peers |
| Vehicle Maintenance | 100% | 99% | 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 | 3 | — | 6.67% |
| Vehicle | 0 | 30 | — | 22.26% |
| Hazmat | 0 | 0 | — | 4.44% |
Where they run
Inspected in 3 states. Top state accounts for of activity.
| Period | Fatalities | Injuries | Tow-away | Total |
|---|---|---|---|---|
| Jan 1, 2026 | 0 | 0 | 1 | 1 |
Most-cited violation codes
| BASIC Category | Total | Severe | OOS |
|---|---|---|---|
| Vehicle Maintenance | 49 | 10 |
| Date | State | Vehicle | Violations | OOS |
|---|---|---|---|---|
| Feb 26, 2026 | SD | TRUCK TRACTOR | 4 | 2 |
| Jan 15, 2026 | ND | STRAIGHT TRUCK | 24 | 19 |
| Oct 21, 2025 | ND | TRUCK TRACTOR | 2 | 1 |
| Oct 1, 2025 | ND | STRAIGHT TRUCK |
| Insp w/ Viol |
|---|
| Measure |
|---|
| Alert |
|---|
| Unsafe Driving | 1 | 0.80 | — |
| HOS Compliance | 1 | 3.00 | — |
| Vehicle Maintenance | 4 | 27.90 | — |
| Driver Fitness | 1 | 2.14 | — |
| Controlled Substances | 0 | 0.00 | — |
| 22 |
| Hours-of-Service Compliance | 2 | 0 | 2 |
| Driver Fitness | 1 | 1 | 1 |
| Unsafe Driving | 1 | 0 | 0 |
| 7 |
| Dec 11, 2024 | ND | STRAIGHT TRUCK | 10 | 4 |
| Oct 11, 2024 | UT | STRAIGHT TRUCK | 0 | 0 |
| Date | Code | Description | BASIC | OOS |
|---|---|---|---|---|
| Feb 26, 2026 | 3929A2C | Cargo - Vehicle components or dunnage not secured | Vehicle Maintenance | Yes |
| Feb 26, 2026 | 39375A3TAOL | Tires - All others leaking or inflation less than 50% of the maximum inflation pressure on tire not equipped with ATIS | Vehicle Maintenance | Yes |
| Feb 26, 2026 | 3939ALRLI | Lighting - Tail lamp - Any inoperative | Vehicle Maintenance | — |
| Feb 26, 2026 | 39617CPI | Operating a CMV without documentation of a periodic inspection | Vehicle Maintenance | — |
| Jan 15, 2026 | 3927AD | Driver - Failed to conduct pre-trip inspection or make use of required parts and accessories | Vehicle Maintenance | — |
| Jan 15, 2026 | 3929A2C | Cargo - Vehicle components or dunnage not secured | Vehicle Maintenance | Yes |
| Jan 15, 2026 | 393100CC | Cargo - Cargo not secured against shifting | Vehicle Maintenance | — |
| Jan 15, 2026 | 393104BC | Cargo - Damaged securement devices/tiedowns | Vehicle Maintenance | — |
| Jan 15, 2026 | 393110B2IC | Cargo - Insufficient tiedowns (w/o headerboard/blocking) for article(s) of cargo 5 feet or less and more than 1100 lbs | Vehicle Maintenance | Yes |
| Jan 15, 2026 | 39311A1CSLRR | Conspicuity Systems - Truck tractor lower rear retro reflective sheeting missing on vehicle manufactured on or after July 1 1997 | Vehicle Maintenance | — |