MAMMOTH UNIFIED SCHOOL DISTRICT
Not RatedDOT Number: 620266
Company Information
- Phone
- (760) 934-6802
- Address
- 461 SIERRA PARK ROAD, MAMMOTH LAKES, CA 93546
- FleetPower units are the commercial motor vehicles (trucks, tractors, buses) registered to this carrier.
- 7 power units · 7 drivers
- Operation
- Interstate
Latest Roadside Inspections
Click any inspection to view violation details.
| Date | LevelLevel 1 is the most thorough inspection (full vehicle and driver review). Level 2 is a walk-around. Level 3 is driver-only. Level 5 is vehicle-only without driver present. | State | ViolationsThe total number of violations found during this roadside inspection, including both driver and vehicle issues. | StatusOut-of-Service (OOS) means the violation was serious enough that the vehicle or driver was ordered off the road until the issue is corrected. | Expand |
|---|---|---|---|---|---|
| 7/25/2025 | Level 5 | CA | 0 | Passed | |
| 7/25/2025 | Level 5 | CA | 1 | Passed | |
| 7/25/2025 | Level 5 | CA | 0 | Passed | |
| 7/25/2025 | Level 5 | CA | 0 | Passed | |
| 7/25/2025 | Level 5 | CA | 0 | Passed | |
| 7/25/2025 | Level 5 | CA | 0 | Passed | |
| 7/22/2025 | Level 5 | CA | 1 | Passed | |
| 11/14/2024 | Level 5 | CA | 0 | Passed | |
| 8/2/2024 | Level 5 | CA | 0 | Passed | |
| 8/2/2024 | Level 5 | CA | 0 | Passed | |
| 8/2/2024 | Level 5 | CA | 1 | Passed | |
| 8/2/2024 | Level 5 | CA | 0 | Passed | |
| 8/2/2024 | Level 5 | CA | 1 | Passed | |
| 8/2/2024 | Level 5 | CA | 0 | Passed | |
| 8/24/2023 | Level 3 | CA | 2 | OOS Violation | |
| 7/28/2023 | Level 5 | CA | 1 | Passed | |
| 7/28/2023 | Level 5 | CA | 1 | Passed | |
| 7/28/2023 | Level 5 | CA | 0 | Passed | |
| 7/28/2023 | Level 5 | CA | 2 | Passed | |
| 7/28/2023 | Level 5 | CA | 2 | OOS Violation |
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Understanding This Report
Safety Rating is assigned after an FMCSA compliance review. “Satisfactory” means adequate safety controls are in place. “Conditional” means corrective action is needed. “Unsatisfactory” indicates a risk to public safety. Many carriers are “Not Rated” simply because they haven't been reviewed yet.
OOS violations are the most serious outcomes of a roadside inspection — the vehicle or driver is immediately taken off the road. A high OOS rate is a strong indicator of systemic maintenance or compliance issues.
For a deeper understanding, read our guides on CSA scores and DOT roadside inspection levels.