Carrier profile · USDOT 2537037 · Updated Jun 13, 2026

JAZ LLC

DBA BLACK DIAMOND OILFIELD SERVICES

43 power unitsavg 16.4 yrLocal · 1 statesGARDENDALE, TX68/100
AUTHORITY STATUS UNKNOWNHAZMAT
Verified linksFMCSA SAFER

Safety

Roadside out-of-service rates versus the national benchmark, inspection and crash trends, decoded violation themes, and ELD / hours-of-service integrity — the full safety picture behind the verdict.

Out-of-service rate· 24-mo cumulative · vs national

Vehicle OOS 48.5%24-mo cumulative
050%nat'l 22.26%
Driver OOS 7.3%24-mo cumulative
030%nat'l 6.67%

Every inspection in the window pooled — 66 vehicle and 68 driver inspections over 24 months.

Vehicle OOS rate· vehicle OOS · vehicle-level inspections · 6-month trailing

80.0% · latest 6-mo window▼ Falling

Share of vehicle-level roadside inspections in each trailing six-month window that resulted in a vehicle out-of-service order. Trending down 24.3 pts across the window. The national vehicle benchmark uses the same metric and is shown on the chart.

Roadside inspection history· 24 charted calendar months · vehicle / driver level · any-OOS overlay

66 inspections in the charted months · busiest month Apr '25 · 6

Vehicle-levelDriver-levelAny OOS

Monthly FMCSA roadside inspections across the 24 charted calendar months. Bars show level-qualified vehicle and driver populations; one inspection can qualify for both. The line shows inspections with any out-of-service result.

Inspection coverage· expected vs observed · the fraud signal

Inspection coverage

How heavily FMCSA inspects this fleet for its size — it tells you how much to trust the safety signals above. Thin coverage on a young authority is a fraud signal nobody else surfaces.

Expected band
Under-inspected
Expected
Well-monitored
Heavily inspected
≈0.8 / unit·yr
thin signalabundant signal
Roadside-inspection volume is about what you'd expect for a 43-unit fleet — enough signal to read the safety record, though not a heavy sample.
Registered power units
43
Inspections · 24 mo
68
Annualized
≈34 / yr
Coverage
≈0.8 inspections / unit · yr

BASIC categories· CSA SMS · Aug 2026

Unsafe Driving
.02measure
SMS · per-BASIC
28%
Hours-of-Service
Vektor peer est.
47%
Driver Fitness
Vektor peer est.
Controlled Substances
0violations
clean · per-BASIC
97%
Vehicle Maintenance
Vektor peer est.

Percentile = standing among same-exposure peers (higher = worse). FMCSA publishes percentiles for only some carriers (shown official); elsewhere we show a Vektor peer-percentile estimate, or the absolute SMS measure when there are too few inspections to rank.

Violation themes· decoded · grouped by BASIC

What this carrier actually gets cited for — FMCSA violation codes decoded into plain English, ranked by frequency.

  • 393.9 Inoperative required lampsVehicle Maintenance92 · 5 OOS
  • 393.75 Tires (defective / underinflated / worn)Vehicle Maintenance50 · 23 OOS
  • 393.11 Required lamps/reflectors missingVehicle Maintenance49 · 0 OOS
  • 393.55 Antilock brake system (ABS)Vehicle Maintenance39 · 0 OOS
  • 393.78 Windshield wipersVehicle Maintenance24 · 0 OOS
  • 393.47 Brake actuators / linings / componentsVehicle Maintenance19 · 3 OOS
  • 396.3 Inspection / repair / maintenance not performedVehicle Maintenance17 · 10 OOS
  • 393.207 Parts & accessories (vehicle condition)Vehicle Maintenance16 · 9 OOS
  • 393.95 Emergency equipment (extinguisher, triangles)Vehicle Maintenance13 · 0 OOS
  • 393.60 Windshield / glazingVehicle Maintenance11 · 0 OOS

ELD & hours-of-service

3 hours-of-service / ELD violations on record · most recent Apr 16, 2026. FMCSA does not publish the ELD device brand; these are the carrier's logging-compliance signals.

1ELD device issues
1No log / no ELD
0False logs
0Drove over hours

Trending worse — 100% of ELD violations are in the last 24 months.

Crash history· 14 total · 4 in 24 mo

14
Total crashes
4
In last 24 mo
4
Fatal
9
Injury
YearCrashesFatalInjuryTow
20261011
20251011
20244214
20221011
20212122
20194124
20181011
DateStateFatalitiesInjuriesTow-away
May 16, 2026TX01Yes
May 4, 2025TX01Yes
Dec 17, 2024TX10Yes
Sep 20, 2024TX00Yes
Feb 11, 2024TX11Yes
Jan 15, 2024TX00Yes
Jan 2, 2022TX03Yes
Jul 24, 2021TX01Yes
Jun 23, 2021TX11Yes
Nov 15, 2019TX11Yes
Mar 13, 2019TX01Yes
Jan 15, 2019TX00Yes
Jan 8, 2019TX00Yes
Jun 16, 2018TX01Yes