DIAMOND MATERIALS LLC
AUTHORIZEDUSDOT
45597
MC Number
76472
Fleet Size
139
Total Drivers
117
FMCSA-derived snapshot updated: August 23, 2026. This is not a real-time record; verify critical authority, insurance and safety details directly with FMCSA.
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Safety overview
DIAMOND MATERIALS LLC is a large interstate motor carrier based in WILMINGTON, Delaware, operating 139 power units with 117 drivers. CarrierOwl is currently validating BASIC percentile display against the official FMCSA SMS portal; use the inspection, out-of-service, crash, authority, and insurance data below as the primary public safety indicators on this page. Their driver out-of-service rate of 2.3% comes in under the 6.7% national average. They have 9 crashes on file (5 with injuries). FMCSA records show 131 inspections for this carrier.
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BASIC scores
Under reviewCarrierOwl is validating BASIC percentile calculations against the official FMCSA SMS portal. Until that review is complete, use FMCSA directly for current BASIC percentiles and use the inspection, out-of-service, crash, authority, and insurance data on this page as supporting indicators.
BASIC percentile display is temporarily paused while we validate CarrierOwl's methodology against the official FMCSA SMS portal.
Out-of-service rates vs. national average
An out-of-service order means the driver or vehicle was pulled from operation during a roadside inspection.
For reference, the average driver OOS rate in Delaware is 15.9% and the average vehicle OOS rate is 26.9% across 4,865 carriers.
Company details
- Entity Type
- N/A
- Carrier Operation
- Interstate
- Operation Classification
- Authorized For Hire, Private (Property)
- Cargo Carried
- N
- Hazmat
- Yes
- Safety Rating Date
- N/A
Inspections
131
Total
58%
Driver %
Insurance on file
Liability (BIPD)
ARCH INSURANCE COMPANY — eff. Jan 1, 2012
Cargo
Not on file
Surety Bond
Not on file
Trust Fund
Not on file
Source: Legacy FMCSA. Verify current filings directly with FMCSA before relying on them.
Crash history
9
Total Crashes
Similar carriers in Delaware
Other carriers in the same state with a similar fleet size.
ATLANTIC CONCRETE COMPANY INC
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NIXON UNIFORM SERVICE INC
ADVANCED STUDENT TRANSPORTATION INC
WASTE MANAGEMENT OF DELAWARE INC
Frequently asked questions
Is DIAMOND MATERIALS LLC authorized to operate?
CarrierOwl's FMCSA-derived snapshot for DIAMOND MATERIALS LLC (USDOT #45597) shows "AUTHORIZED" status. The snapshot lists them as an interstate carrier. Verify the current official record with FMCSA before booking a load.
What is DIAMOND MATERIALS LLC's safety record?
DIAMOND MATERIALS LLC has 131 inspections in CarrierOwl's current imported snapshot and 9 matching crashes. They do not show a formal FMCSA safety rating in CarrierOwl's current data. A zero result is limited to the dataset and snapshot window. Verify current BASIC percentiles and crash information directly with FMCSA before relying on them.
How many trucks does DIAMOND MATERIALS LLC operate?
DIAMOND MATERIALS LLC operates 139 power units with 117 drivers on file. That puts them in the large carrier category by FMCSA standards.
Does DIAMOND MATERIALS LLC transport hazardous materials?
Yes. DIAMOND MATERIALS LLC is flagged for hazardous materials transportation with FMCSA. That means additional safety requirements and more frequent inspections.
Where is DIAMOND MATERIALS LLC located?
DIAMOND MATERIALS LLC is based in WILMINGTON, Delaware at 924 S HEALD ST, 19801. Phone: (302) 658-6524.
What are DIAMOND MATERIALS LLC's out-of-service rates?
DIAMOND MATERIALS LLC's driver out-of-service rate is 2.3%, compared with the 6.7% reference shown by FMCSA SMS when checked August 4, 2026. Interpret the difference with inspection volume and verify the current FMCSA record. Their vehicle out-of-service rate is 9.7%, compared with the 23.4% reference shown by FMCSA SMS when checked August 4, 2026. Interpret the difference with inspection volume and verify the current FMCSA record.