Carrier profile · USDOT 45597 · MC-76472 · Updated Jun 13, 2026

DIAMOND MATERIALS LLC

136 power unitsavg 7.8 yrRegional · 4 statesWILMINGTON, DE94/100
CARRIER ACTIVEMC-76472 ACTIVERATED CONDITIONALHAZMAT
Verified linksdiamondmaterials.comFMCSA 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 9.8%24-mo cumulative
050%nat'l 22.26%
Driver OOS 2.3%24-mo cumulative
030%nat'l 6.67%

Every inspection in the window pooled — 92 vehicle and 130 driver inspections over 24 months.

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

10.5% · latest 6-mo window● Steady

Share of vehicle-level roadside inspections in each trailing six-month window that resulted in a vehicle out-of-service order. Holding steady 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

126 inspections in the charted months · busiest month Jun '26 · 12

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
≈0.5 / unit·yr
thin signalabundant signal
Roadside-inspection volume is about what you'd expect for a 136-unit fleet — enough signal to read the safety record, though not a heavy sample.
Registered power units
136
Inspections · 24 mo
130
Annualized
≈65 / yr
Coverage
≈0.5 inspections / unit · yr

BASIC categories· CSA SMS · Aug 2026

26%
Unsafe Driving
Vektor peer est.
Hours-of-Service
0violations
clean · per-BASIC
77%
Driver Fitness
Vektor peer est.
Controlled Substances
0violations
clean · per-BASIC
18%
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.

  • 392.2 State/local traffic law violation (speeding, etc.)Unsafe Driving43 · 0 OOS
  • 393.95 Emergency equipment (extinguisher, triangles)Vehicle Maintenance9 · 0 OOS
  • 393.75 Tires (defective / underinflated / worn)Vehicle Maintenance8 · 7 OOS
  • 393.47 Brake actuators / linings / componentsVehicle Maintenance3 · 0 OOS
  • 391.41 No / expired medical certificateDriver Fitness3 · 1 OOS
  • 396.3 Inspection / repair / maintenance not performedVehicle Maintenance3 · 2 OOS
  • 393.45 Brake tubing / hose defectsVehicle Maintenance3 · 1 OOS
  • 393.11 Required lamps/reflectors missingVehicle Maintenance2 · 0 OOS
  • 390.21 USDOT number marking on vehicleUnsafe Driving2 · 0 OOS
  • 393.78 Windshield wipersVehicle Maintenance2 · 0 OOS

ELD & hours-of-service

No hours-of-service or ELD violations on record across 185 inspections — a clean logging history.

Crash history· 46 total · 9 in 24 mo

46
Total crashes
9
In last 24 mo
0
Fatal
17
Injury
YearCrashesFatalInjuryTow
20262002
20255035
20242022
20232002
20221001
20211001
20206016
20192012
20183012
20173013
20164024
20144024
20131001
20122002
20101001
20081001
20071011
20042021
20031001
19991010
19961001
DateStateFatalitiesInjuriesTow-away
Apr 20, 2026MD00Yes
Apr 13, 2026NJ00Yes
Aug 27, 2025MD00Yes
Jun 9, 2025DE02Yes
Apr 24, 2025NJ01Yes
Feb 18, 2025NJ00Yes
Feb 18, 2025NJ01Yes
Nov 12, 2024PA01Yes
Nov 12, 2024DE01Yes
Aug 10, 2023NJ00Yes
Feb 7, 2023NJ00Yes
Aug 4, 2022DE00Yes
Jul 15, 2021PA00Yes
Dec 2, 2020DE00Yes
Aug 17, 2020DE02Yes
Aug 16, 2020DE00Yes
Aug 11, 2020NJ00Yes
Jun 15, 2020DE00Yes
Jan 10, 2020NJ00Yes
Sep 20, 2019PA00Yes
Mar 29, 2019PA01Yes
Nov 13, 2018PA01No
May 30, 2018DE00Yes
May 7, 2018DE00Yes
Nov 3, 2017NJ02Yes