DIAMOND MATERIALS LLC

DOT# 45597 MC# 76472 DUNS# 884222167 Wilmington, DE Authorized For-Hire / Private Property
(302) 658-6524 diamondmaterials@diamondmaterials.com 924 S Heald St, Wilmington DE 19801
139 power units · all owned 117 drivers
HazMat
Satisfactory
FRED Score 50.0 / 100
Moderate confidence
52 yrs history · 130 roadside inspections

FMCSA Live Status

Checking FMCSA…

Fleet & equipment

Power units
139
Drivers · CDL
117 · 117
Annual miles
677k unreliable
Type Own Term Trip Total
Trucks 117 0 0 117
Tractors 19 0 0 19
Trailers 35 0 0 35

Registration

Organization
CORPORATION
FMCSA Rating
Conditional (05-26-1988)historical — superseded by active authority (reviewed 38 yr ago)
Registered
06-01-1974 (52 yrs)
MCS-150 Update
07-02-2025 (Address Change)
FRED Score Date
Nov 07, 2026
Officer
RICHARD E. PIERSON, JR
Officer
TONI WOOD

Cargo

58.7
medium risk
Machinery/Large Objects Liquids/Gases Logs/Poles/Beams/Lumber Building Materials Dry Bulk Construction Garbage/Refuse Chemicals
High-Risk Cargo
Machinery Large

Estimated from the commodity types reported to FMCSA, not from loss history or the true cargo mix.

Mileage Unreliable

MCS-150 annual mileage appears too low for fleet size given observed activity. The per-100k-mile rate benchmarks on this page are excluded; the FRED grade does not use mileage (crash exposure is power-unit-years, violation exposure is inspection counts).

Too little record to tell how this motor carrier's crash rate compares with similar fleets.

Similar fleets: for-hire fleets of 100–199 trucks with the same kind of operation, years in business and amount of road activity. Compared using its own crash record and roadside inspections.

Per truck, fleets like this one are expected to crash about 0.5× as often as the median active fleet of 100–199 trucks.

This motor carrier 1.10×
ExcellentStrongSatisf.MarginalPoorCritical
▲ Similar fleets 1.0×
Leaning Marginal. Its estimate (1.10× similar fleets) is in the Marginal range, but the record isn't strong enough to be 60% sure it is above the Marginal line (1.06×), so the grade stays Satisfactory.
Expected crashes, next 12 months
2.9 vs 2.7 for similar fleets
Likely 0–6 crashes
This motor carrier
2.9
Similar fleets
2.7
Chance of a fatal crash, next 12 months
~8%
About typical for similar fleets.
What's driving the grade
Crash history
betterworse
Leans worse, not yet proven. 9 crashes on the FMCSA record in 24 months (about 4.5 a year), including 5 with injuries; similar fleets have about 2.7 a year.
Roadside inspections
betterworse
Better than peers. Out-of-service orders 0.44×, violations 0.47× and unsafe-driving and hours-of-service violations 0.62× the rate expected for its inspections. Together they move its crash estimate -16%.

Worth a closer look

From the FMCSA record. The grade already counts the safety items; insurance filings and links to other motor carriers are not in it.

  • Injury crashes
    5 crashes with 6 people hurt in 24 months.
    Ask: claim status and driver history for these crashes.
  • Driver qualification
    4 out-of-service violations against drivers: 4 no valid CDL (Nov 2025 – Aug 2026).
    Ask: driver qualification files and hiring standards.
  • Brakes and tires
    Brakes are 12 of 58 violations (21%). Brake or tire defects led to 10 out-of-service orders.
    Ask: the preventive-maintenance schedule and shop records.
Strengths
  • Vehicle out-of-service rate 8.8% vs 22.3% national; driver 2.3% vs 6.7%.
  • No FMCSA BASIC alerts.
Data flags
  • Dangerous driving: 2
  • High speeding: 7
  • Unreliable reported mileage
    The motor carrier's self-reported annual mileage (MCS-150) looks implausible, so exposure- and mileage-based figures may be distorted.
  • Estimated mileage
    No usable mileage was reported, so exposure was estimated from similar motor carriers. Mileage-based metrics here are approximate.
  • Historical FMCSA safety rating
    FMCSA once rated this motor carrier Conditional or Unsatisfactory, but the rating is stale or superseded — the motor carrier still holds active operating authority (a current Unsatisfactory would have it revoked), so it does not reflect current standing. Shown for context, not as a current finding.

Track record

FMCSA record, Oct 2024 – Sep 2026 · grade scored on Sep 1, 2023 → Sep 30, 2026
Crashes
9
0 fatalities · 6 injuries · 0 tow-aways
Inspections
130
70% clean (no violations)
Vehicle out-of-service
8.8%
8 of 91
National avg 22.3%
Driver out-of-service
2.3%
3 of 130
National avg 6.7%
Violations
58
14 out-of-service
Inspections per quarter With an out-of-service order
Q4 '24: 22 inspections, 0 out of service 22 Q4 '24 Q1 '25: 12 inspections, 1 out of service 12 Q1 '25 Q2 '25: 13 inspections, 1 out of service 13 Q2 '25 Q3 '25: 12 inspections, 1 out of service 12 Q3 '25 Q4 '25: 13 inspections, 1 out of service 13 Q4 '25 Q1 '26: 18 inspections, 4 out of service 18 Q1 '26 Q2 '26: 24 inspections, 1 out of service 24 Q2 '26 Q3 '26: 16 inspections, 2 out of service 16 Q3 '26
vs 1,871 peer fleets
This motor carrierPeers
Crashes 0.032 0.024
Inspections 0.65 0.91
Violations 0.21 0.51
Critical violations 0.04 0.10

Yearly rates from the last 24 months. Peers: 100–199 power units, medium-risk cargo.

What they get cited for

58 violations · 24 months
  • Vehicle maintenance No alert
    37 · 10 OOS
    Brakes 12 · Tires 7 · Lights 4 · Cargo securement 2 · Other parts 12
  • Unsafe driving No alert
    15 · 0 OOS
    Speeding 8 · Reckless / lane 6 · Other 1
  • Driver fitness No alert
    6 · 4 OOS
    No valid CDL 5 · Medical certificate 1
  • Hours of service No alert
    0
  • Drugs & alcohol No alert
    0
Out-of-service violations “No alert” = under FMCSA's BASIC intervention threshold

Violations by quarter

Tap a category to show or hide it
No violation trend data

Crashes

24 months
  • Apr
    20
    2026
    Maryland
    Property damage only
    Daylight, two-way trafficway divided unprotected median.
  • Apr
    13
    2026
    New Jersey
    Property damage only
    Daylight, two-way trafficway divided unprotected median.
  • Aug
    27
    2025
    Maryland
    Property damage only
    Daylight, two-way trafficway divided unprotected median.
  • Jun
    9
    2025
    Delaware
    Injury · 2 people hurt
    Daylight, blowing sand soil dirt or snow, one-way trafficway not divided.
  • Apr
    24
    2025
    New Jersey
    Injury · 1 person hurt
    Dark - not lighted, two-way trafficway divided unprotected median.
  • Feb
    18
    2025
    New Jersey
    Property damage only
    Daylight, two-way trafficway divided positive barrier.
  • Feb
    18
    2025
    New Jersey
    Injury · 1 person hurt
    Dawn, severe crosswinds, two-way trafficway not divided.
  • Nov
    12
    2024
    Delaware
    Injury · 1 person hurt
    Dark - lighted, two-way trafficway divided positive barrier.

1 more in the FMCSA records below.

Insurance filed with FMCSA

FMCSA record through Nov 2, 2026
Today · live FMCSA check
Checking FMCSA…
Liability (BIPD)
$1,000,000 · Arch Insurance Company
on record since Jan 1, 2012 · FMCSA minimum $1,000,000
Cargo filing
not required by FMCSA (household-goods motor carriers only); the cargo policy is not on FMCSA's record
36 months to Nov 2, 2026
  • One liability insurer throughout
  • No gap in filed liability coverage while liability was required

Operating authority active (FMCSA's new registration system, status since Feb 15, 2012)

Who insures fleets like this →

FMCSA filings only, not a policy audit. Not part of the FRED grade. Wrong or out of date?

Where it happens

Loading map data…
Inspections by state
  • New Jersey 72
  • Maryland 31
  • Delaware (HQ) 26
  • Pennsylvania 1

20% of inspections were in its home state.