Carrier profile · USDOT 516591 · Updated Jul 23, 2026

UNDERGROUND CONSTRUCTION CO INC

DBA UNDERGROUND CONSTRUCTION

301 power unitsavg 6.9 yrLocal · 1 statesBENICIA, CA100/100
AUTHORITY STATUS UNKNOWN
Verified linksundergroundconstruction.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 10.2%24-mo cumulative
050%nat'l 22.26%
Driver OOS 0.0%24-mo cumulative
030%nat'l 6.67%

Every inspection in the window pooled — 59 vehicle and 71 driver inspections over 24 months.

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

12.5% · latest 6-mo window▲ Rising

Share of vehicle-level roadside inspections in each trailing six-month window that resulted in a vehicle out-of-service order. Trending up 5.3 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

62 inspections in the charted months · busiest month Feb '25 · 7

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 301-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
301
Inspections · 24 mo
71
Annualized
≈36 / yr
Coverage
≈0.1 inspections / unit · yr

BASIC categories· CSA SMS · Aug 2026

1%
Unsafe Driving
Vektor peer est.
22%
Hours-of-Service
Vektor peer est.
44%
Driver Fitness
Vektor peer est.
Controlled Substances
0violations
clean · per-BASIC
11%
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 Driving37 · 3 OOS
  • 396.5 Oil and/or grease leakVehicle Maintenance4 · 1 OOS
  • 393.75 Tires (defective / underinflated / worn)Vehicle Maintenance2 · 2 OOS
  • 393.9 Inoperative required lampsVehicle Maintenance2 · 1 OOS
  • 393.45 Brake tubing / hose defectsVehicle Maintenance2 · 2 OOS
  • 393.11 Required lamps/reflectors missingVehicle Maintenance2 · 1 OOS
  • 393.100 Cargo securement (general)Vehicle Maintenance2 · 2 OOS
  • 393.60 Windshield / glazingVehicle Maintenance2 · 0 OOS
  • 393.43 Parts & accessories (vehicle condition)Vehicle Maintenance1 · 1 OOS
  • 390.21 USDOT number marking on vehicleUnsafe Driving1 · 0 OOS

ELD & hours-of-service

1 hours-of-service / ELD violation on record · most recent May 15, 2024. FMCSA does not publish the ELD device brand; these are the carrier's logging-compliance signals.

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

Crash history· 29 total · 0 in 24 mo

29
Total crashes
0
In last 24 mo
1
Fatal
7
Injury
YearCrashesFatalInjuryTow
20233003
20226136
20214024
20201001
20195005
20185015
20162002
20151011
20071001
20051001
DateStateFatalitiesInjuriesTow-away
May 12, 2023CA00Yes
Mar 30, 2023AZ00Yes
Feb 28, 2023AZ00Yes
Aug 17, 2022CA01Yes
Jul 22, 2022AZ00Yes
Jul 18, 2022CA00Yes
Jun 2, 2022CA01Yes
Mar 11, 2022CA00Yes
Feb 23, 2022AZ11Yes
Dec 9, 2021CA00Yes
Sep 13, 2021CA01Yes
Jul 27, 2021CA00Yes
Jul 14, 2021CA02Yes
Apr 8, 2020CA00Yes
Dec 5, 2019CA00Yes
Aug 13, 2019CA00Yes
Aug 13, 2019CA00Yes
Aug 12, 2019CA00Yes
Aug 7, 2019CA00Yes
May 29, 2018CA00Yes
May 20, 2018CA00Yes
Apr 3, 2018AZ00Yes
Feb 27, 2018CA00Yes
Jan 23, 2018CA01Yes
Jul 28, 2016CA00Yes