🚀Major update: Network Intelligence is live — carrier detail pages, vetting reports, and graph exploration.See what's new →
Truck Graph
60/100
⚠ Caution
Risk signals detected. Verify authority, insurance, and safety record.
Diamond Materials LLC
DOT 45597 · MC MC76472 · Wilmington, DE
Report generated: June 11, 2026 at 7:30 AM
✓Authorized for hire?
✓Active insurance?
✗Safety record clean?
✓No fraud flags?
✓No prior revocations?
Carrier Summary

Diamond Materials LLC (DOT 45597, MC MC76472) is a Delaware-based interstate carrier headquartered in Wilmington, DE. As of June 11, 2026 at 7:30 AM, operating authority is currently active. TruckGraph has detected 3 risk signals on this carrier, including: crash with fatalities or injuries on record; unsafe driving violation on record. TruckGraph rates this carrier "Caution" based on FMCSA compliance data, inspection history, insurance status, and network connection analysis. Last synced: June 11, 2026 at 7:30 AM.

Common Authority
FMCSA Public Record
Diamond Materials LLC
DOT Number45597
MC NumberMC76472
Street924 S HEALD ST
City / StateWilmington, DE 19801
Phone3026586524
Operation typeInterstate
HazmatNot authorized
Authority age52 yr
MCS-150 filed07/02/2025
Company officerRichard E. Pierson, Jr
Power units139
Total drivers117
Authority Status
Common (for-hire)✓ Active
Contract (for-hire)Not authorized
BrokerNot authorized
TruckGraph Intelligence
Risk Signals
●Crash with fatalities or injuries on record
●Unsafe driving violation on record
●Driver qualification violation on record
✓ OFAC Sanctions: Clear
Connection Chain
Active
OOS rate 7.8% vs. national avg 22.26% — below average
Network Intelligence Map
Carriers sharing an officer, address, or phone with Diamond Materials LLC
View full network →
Power Units
139
Fleet
Drivers
117
Total
Inspections
102
On record
Crashes
6
On record
OOS Rate
7.8%
↓ Avg 22.26%
Authority Age
52 yr
Since 1974
Violation Categories — Last 24 Months
Hours of Service
102 insp (100%)
Unsafe Driving
102 insp (100%)· 9 viol
Driver Fitness
102 insp (100%)· 4 viol
Controlled Substances
102 insp (100%)
Vehicle Maintenance
67 insp (66%)· 16 viol
Inspection History
102 total · OOS rate 7.8%
DateStateLevelDriver OOSVehicle OOSResult
5/31/2024MDIII00Pass
3/31/2025NJIII00Pass
7/31/2024DEII00Pass
12/31/2024NJIII00Pass
7/30/2024NJIII00Pass
8/30/2024NJII00Pass
10/29/2024DEIII00Pass
11/28/2025NJIII20OOS
6/28/2024DEII01OOS
2/28/2025DEII00Pass
Crash History
6 total on record
DateStateFatalitiesInjuriesTow-away
—MD00Y
—DE00Y
—MD00Y
—DE01Y
—DE00Y
Insurance Status
Status
✓ Active filing on record
Insurer
ARCH INSURANCE COMPANY
Coverage type
91X
Coverage amount
$1,000,000
Effective
1/1/2012
Location
924 S HEALD ST, Wilmington, DE, 19801 · Open in Maps →
924 S HEALD ST, WILMINGTON, DE, 19801Open in Maps →
Authority Timeline
Authority GrantedJun 1974
FMCSA issued operating authority
ActiveCurrent
Authority currently active

Source: FMCSA compliance records, inspection data, crash records, insurance filings, and TruckGraph analysis. View methodology

Important Legal Notice

Data sourced from FMCSA public records and TruckGraph independent analysis. This is not legal advice, not a guarantee of carrier safety, and not a compliance certification. Verify through official FMCSA sources before tendering. Last synced: .

Verify Independently
Related Carriers in Delaware
Community Reviews

No reviews yet — be the first to share your experience with this carrier.

Write a review for Diamond Materials LLC
0/2000

Reviews are moderated before publication. We do not publish email addresses.

Frequently Asked Questions

Is Diamond Materials LLC authorized to operate?

Yes. Diamond Materials LLC holds Common operating authority and is currently active.

What is Diamond Materials LLC's safety record?

Diamond Materials LLC has 102 roadside inspections on record with an out-of-service rate of 7.8%. Crash history shows 6 incidents. Review the full safety profile above before making a freight decision.

How many trucks does Diamond Materials LLC operate?

Diamond Materials LLC operates 139 power units with approximately 117 drivers.

Is Diamond Materials LLC insured?

Diamond Materials LLC has active insurance coverage on file. Coverage amount and carrier details are shown in the insurance section above.

Has Diamond Materials LLC had any risk indicators?

Diamond Materials LLC has a risk score of 60/100 (High Risk) with 3 active risk signals. Review the risk section above and verify independently before tendering.

What is the DOT number for Diamond Materials LLC?

Diamond Materials LLC's DOT number is 45597 and MC number is MC76472. These identifiers are assigned by the FMCSA and can be used to look up this carrier in official compliance databases.

Explore Carriers Like Diamond Materials LLC
Cite this page

For journalists and researchers

Truck Graph data is open and citable. For press inquiries, contact our editorial team.

APA
Truck Graph. (2026). Diamond Materials LLC Safety Record, DOT 45597. Retrieved from https://truckgraph.com/carriers/45597
MLA
"Diamond Materials LLC Safety Record, DOT 45597." Truck Graph, Jun 11, 2026, https://truckgraph.com/carriers/45597
Chicago
"Diamond Materials LLC Safety Record, DOT 45597." Truck Graph. Last modified June 11, 2026. https://truckgraph.com/carriers/45597