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DIAMOND MATERIALS LLC

USDOT 45597 · MC-76472 · WILMINGTON, DE Authorized

DIAMOND MATERIALS LLC is a carrier registered with the FMCSA under USDOT number 45597, based in WILMINGTON, DE. It operates in interstate commerce. It holds active FMCSA operating authority under MC-76472 and is currently Authorized to operate for hire. Its fleet includes 139 power units and 117 drivers. Its most recent FMCSA safety rating is Conditional. This record was last updated 2026-09-06 from official FMCSA data.

Vetting snapshot

Operating authority
Authorized
USDOT registration
Active
MCS-150 biennial update
Current - filed 2025-07-02
Safety rating
Conditional
Registered with FMCSA
52 years
Fleet
139 power units

Safety record (FMCSA, last 24 months)

Inspections (24 months)
124
Vehicle out-of-service rate
8.1% (FMCSA national average roughly 21%)
Driver out-of-service rate
2.4% (FMCSA national average roughly 5%)
Crashes (24 months)
7, 6 with injuries
Last inspection
2024-05-31

Safety data as of 2026-06-24.

Insurance on file (FMCSA)

No active insurance on file The most recent FMCSA filing (SELECTIVE WAY INSURANCE COMPANY, Cargo) was cancelled effective 2007-02-02. For-hire carriers must keep liability insurance on file to retain operating authority.

Insurer filings as recorded by the FMCSA. A certificate from the carrier is not a substitute for the filing on record.

FMCSA record

USDOT Number
45597
MC / Docket Number
MC-76472
Legal Name
DIAMOND MATERIALS LLC
Entity Type
Carrier
USDOT Status
Active
Operating Authority
Authorized
Operation
Interstate
Business Type
CORPORATION
Operation Classification
PRIVATE PROPERTY;AUTHORIZED FOR HIRE
Physical Address
924 S HEALD ST, WILMINGTON, DE, 19801
Mailing Address
242 N JAMES ST SUITE 102, NEWPORT, DE
Phone
(302) 658-6524
Fax
(302) 658-0684
Power Units
139
Trucks
136
Total Drivers
117
CDL Drivers
117
Trailers
35
Hazmat
Yes
Cargo Carried
Building Materials, Chemicals, Construction Materials, Logs, Poles, Beams, Lumber, Large Machinery, Dry Bulk, Liquids/Gases, Garbage/Refuse
Safety Rating
Conditional
Safety Rating Date
1988-05-26
Company Officer
RICHARD E. PIERSON, JR
Company Officer
TONI WOOD
MCS-150 Date
2025-07-02
Registered
1974-06-01
Last Updated
2026-09-06

Frequently asked questions

What is DIAMOND MATERIALS LLC's USDOT number and MC number?

DIAMOND MATERIALS LLC's USDOT number is 45597 and its operating-authority docket is MC-76472.

Is DIAMOND MATERIALS LLC authorized to operate for hire?

Yes. DIAMOND MATERIALS LLC currently holds active FMCSA operating authority.

Is DIAMOND MATERIALS LLC's USDOT registration active?

Its USDOT registration status is Active in the latest FMCSA data. Registration status reflects FMCSA filings (such as the biennial MCS-150 update), not whether the company is currently doing business.

Where is DIAMOND MATERIALS LLC based?

DIAMOND MATERIALS LLC is based in 924 S HEALD ST, WILMINGTON, DE, 19801, according to its FMCSA registration.

How large is DIAMOND MATERIALS LLC's fleet?

DIAMOND MATERIALS LLC reported 139 power units and 117 drivers on its most recent FMCSA MCS-150 filing.

What is DIAMOND MATERIALS LLC's FMCSA safety rating?

DIAMOND MATERIALS LLC's FMCSA safety rating is Conditional, issued 1988-05-26.

Other carriers in DE

Source: official FMCSA / SAFER public records. Verify critical details on this carrier's official FMCSA SAFER snapshot.