Carrier profile · USDOT 970132 · MC-1135640 · Updated Jun 13, 2026

DOT DIAMOND CORE DRILLING INC

63 power unitsMulti-region · 8 statesELYRIA, OH88/100
CARRIER ACTIVEMC-1135640 ACTIVE
Verified linksdotdrilling.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 0.0%24-mo cumulative
050%nat'l 22.26%
Driver OOS 38.5%24-mo cumulative
030%nat'l 6.67%

Every inspection in the window pooled — 9 vehicle and 13 driver inspections over 24 months.

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

0.0% · 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 25.0 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

12 inspections in the charted months · busiest month Apr '26 · 3

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.

Thin coverage
Under-inspected
Expected
Well-monitored
Heavily inspected
≈0.1 / unit·yr
thin signalabundant signal
Few roadside inspections for a 63-unit fleet — the out-of-service and violation signals above rest on a small sample, so weight them cautiously. Thin coverage on a young authority is itself a flag.
Registered power units
63
Inspections · 24 mo
13
Annualized
≈7 / yr
Coverage
≈0.1 inspections / unit · yr

BASIC categories· CSA SMS · Aug 2026

8%
Unsafe Driving
Vektor peer est.
77%
Hours-of-Service
Vektor peer est.
37%
Driver Fitness
Vektor peer est.
Controlled Substances
0violations
clean · per-BASIC
65%
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 Driving7 · 0 OOS
  • 393.95 Emergency equipment (extinguisher, triangles)Vehicle Maintenance6 · 0 OOS
  • 395.8 Record of duty status (log / ELD) not current or missingHOS Compliance4 · 4 OOS
  • 391.41 No / expired medical certificateDriver Fitness3 · 2 OOS
  • 393.9 Inoperative required lampsVehicle Maintenance3 · 0 OOS
  • 393.11 Required lamps/reflectors missingVehicle Maintenance3 · 0 OOS
  • 396.17 Periodic (annual) inspectionVehicle Maintenance2 · 0 OOS
  • 393.75 Tires (defective / underinflated / worn)Vehicle Maintenance2 · 1 OOS
  • 393.55 Antilock brake system (ABS)Vehicle Maintenance1 · 0 OOS
  • 396.3 Inspection / repair / maintenance not performedVehicle Maintenance1 · 1 OOS

ELD & hours-of-service

4 hours-of-service / ELD violations on record · most recent Feb 11, 2026. FMCSA does not publish the ELD device brand; these are the carrier's logging-compliance signals.

1ELD device issues
4No log / no ELD
0False logs
0Drove over hours

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

Crash history· 13 total · 0 in 24 mo

13
Total crashes
0
In last 24 mo
0
Fatal
7
Injury
YearCrashesFatalInjuryTow
20241011
20211001
20193013
20171011
20151010
20142002
20132021
20121001
20101011
DateStateFatalitiesInjuriesTow-away
Jan 31, 2024FL01Yes
Mar 22, 2021OH00Yes
May 21, 2019OH01Yes
Apr 4, 2019OH00Yes
Apr 4, 2019OH00Yes
Apr 18, 2017OH01Yes
Apr 29, 2015VA01No
Apr 8, 2014OH00Yes
Mar 18, 2014OH00Yes
Aug 8, 2013DC01Yes
Jun 26, 2013OH01No
Aug 27, 2012OH00Yes
Dec 14, 2010MD01Yes