DIAMOND SIX S TRUCKING LLC
AUTHORIZEDUSDOT
3961245
MC Number
1480790
Fleet Size
2
Total Drivers
4
Last updated: March 16, 2026
Safety overview
DIAMOND SIX S TRUCKING LLC is a small interstate motor carrier based in CASPER, Wyoming, operating 2 power units with 4 drivers. Their safety profile raises flags: 4 of 5 BASIC categories exceed the 75th percentile, which is where FMCSA considers stepping in. Their driver out-of-service rate of 50.0% runs above the national average of 5.51%. No crashes on file. FMCSA records show 4 inspections for this carrier.
BASIC scores
SMS PercentilesHigher percentile = worse performance relative to peers. Scores at or above 75% may trigger an FMCSA investigation.
Out-of-service rates vs. national average
An out-of-service order means the driver or vehicle was pulled from operation during a roadside inspection.
For reference, the average driver OOS rate in Wyoming is 10.8% and the average vehicle OOS rate is 38.0% across 6,348 carriers.
Company details
- Entity Type
- N/A
- Carrier Operation
- Interstate
- Operation Classification
- Authorized For Hire, Private (Property)
- Cargo Carried
- N
- Hazmat
- No
- Safety Rating Date
- N/A
What are BASIC scores?
FMCSA tracks carrier performance through its Safety Measurement System (SMS), which scores carriers across six categories called BASICs. Each score is a percentile from 0 to 100, based on inspection and crash data from the past 24 months.
A score of 65 means the carrier performed worse than 65% of its peers. Anything above 75% can trigger FMCSA alerts or investigations. Brokers vetting new carriers should pay attention to scores above 50%.
- Unsafe driving
- Speeding, reckless driving, improper lane changes, seatbelt violations. All based on what officers find during roadside inspections.
- HOS / Fatigue
- Hours-of-service violations, logbook problems, driving past the allowed limits. Fatigued driving is one of the top causes of truck crashes in the US.
- Driver fitness
- Licensing problems, expired medical certificates, and other driver qualification issues.
- Controlled substances
- Drug and alcohol testing violations, possession, or impairment.
- Vehicle maintenance
- Brake problems, tire issues, lighting defects, load securement failures. Caught during the vehicle portion of roadside inspections.
- Crash indicator
- Based on crash history from state-reported data. Higher percentile means more crashes relative to the carrier's size and mileage.
Inspections
4
Total
50%
Driver %
Insurance on file
No insurance records on file with FMCSA.
Crash history
0
Total Crashes
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Frequently asked questions
Is DIAMOND SIX S TRUCKING LLC authorized to operate?
Yes. DIAMOND SIX S TRUCKING LLC (USDOT #3961245) currently holds "AUTHORIZED" status with FMCSA. They're registered as an interstate carrier.
What is DIAMOND SIX S TRUCKING LLC's safety record?
DIAMOND SIX S TRUCKING LLC has 4 BASIC scores above the 75th percentile, which is where FMCSA may look into a carrier. Brokers should weigh these scores alongside the inspection history and crash data before making a decision.
How many trucks does DIAMOND SIX S TRUCKING LLC operate?
DIAMOND SIX S TRUCKING LLC operates 2 power units with 4 drivers on file. That makes them a small carrier.
Does DIAMOND SIX S TRUCKING LLC transport hazardous materials?
No. DIAMOND SIX S TRUCKING LLC does not have a hazardous materials flag in the FMCSA database.
Where is DIAMOND SIX S TRUCKING LLC located?
DIAMOND SIX S TRUCKING LLC is based in CASPER, Wyoming at 10100 POISON SPIDER RD, 82604. Phone: (801) 870-6382.
What are DIAMOND SIX S TRUCKING LLC's out-of-service rates?
DIAMOND SIX S TRUCKING LLC's driver out-of-service rate is 50.0%, compared to the national average of 5.51%. Higher than average, which could point to driver compliance issues. Their vehicle out-of-service rate is 50.0% (national average: 20.72%). Above average, which may point to vehicle maintenance gaps.