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DIAMOND MATERIALS LLC

DOT 45597MC 76472ActiveInterstateARCH INSURANCE COMPANYWILMINGTON, DE

COMPANY

Authority since
2023-06-20
MCS-150
2025-07-02 · 676,737 mi (2025)
Fleet
139 units · 35 trailers · 117 drivers
Annual mileage (VMT)
676,737 mi (2025)
Owner origin
Anglosphere
Origin candidates
English 64%

ADDRESS

Physical
924 S HEALD ST
WILMINGTON, DE 19801
Mailing
242 N JAMES ST SUITE 102
NEWPORT, DE 19804

CONTACT

Phone
3026586524
Email
diamondmaterials@diamondmaterials.com

OFFICERS

Primary Officer
RICHARD E. PIERSON, JR
Title
PRESIDENT
Origin
Anglosphere

OPERATION & CARGO

Operation classification
Private Property · Authorized For Hire
Specialty
Tanker / Bulk Liquids
Cargo types
8
Logs, Poles, Beams, LumberBuilding MaterialsMachinery, Large ObjectsLiquids / GasesGarbage, Refuse, TrashChemicalsCommodities Dry BulkConstruction
Self-reported by the company on its latest MCS-150 filing (FMCSA census). Reflects what the carrier is authorized and equipped to haul, not actual recent loads. Specialty is our summary of the declared cargo mix.
AUTHORITY
39 mo
Active authority
INSURANCE
1 active
ARCH INSURANCE COMPANY
RISK GRADE
Minimal Risk
1 risk factors · 4 strengths
OOS RATE
9.3%
18 / 194 inspections

Fleet vs Reality

last 12 months · power-unit VINs from roadside inspections
Checking local VIN index…

Minimal Risk

1 risk factor · 4 strengths · 5 data points

SAFETY PERFORMANCE

Crash Record
46 crashes · 0 fatal · 17 with injuries · 43 tow-away
Clean Inspection Rate
91% — 176 clean of 194 inspections
Out-of-Service Rate
9.3% — driver OOS 4, vehicle OOS 14

COMPLIANCE & AUTHORITY

Operating Authority
Active operating authority on file
Authority Events
7 historical event(s) on file
MCS-150 Filing
Last filed 2025-07-02

INSURANCE

Active Coverage
1 policy(ies) on file · total max coverage $1,000,000

SUMMARY

5 injury crashes in the last 24 months
Low crash rate (3.2 per 100 trucks/yr)
91% clean inspections
Active insurance on file
Coverage $1.0M

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