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Diamond Materials Llc (DOT# 45597) – FMCSA Carrier Profile

DOT# 45597MC# 76472● Active
Updated: 2026-03-09

Diamond Materials Llc is a registered motor carrier with the FMCSA under USDOT number 45597. The company operates from Wilmington, DE and maintains an active operating status with 139 power units and 117 drivers on record.

Safety Rating

FMCSA Safety Rating
⚠ Conditional
Rated: May 26, 1988

Diamond Materials Llc holds a "Conditional" safety rating from the Federal Motor Carrier Safety Administration (FMCSA). This rating indicates that some safety deficiencies were found during the most recent compliance review conducted by FMCSA. View official FMCSA record →

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Company Information

Address924 S Heald St, Wilmington, DE, 19801
Phone(302) 658-6524
EmaildiamondMATERIALS@DIAMONDMATERIALS.COM
Entity TypePrivate Property
OperationInterstate
Power Units139
Drivers117
MCS-150 FiledJuly 2, 2025
Annual Mileage676,737 mi (2025)
All carriers in Delaware→Carriers in Wilmington, DE→

Inspection Summary

All-time Inspections
All-time
110
Total
10
OOS
3
Driver OOS
7
Vehicle OOS
OOS Rate9.09%
The out-of-service (OOS) rate represents the percentage of inspections that resulted in the carrier being placed out of service.

Crash History

Crash Records
All-time
6
Total
0
Fatal
4
Injuries
0
Tow-Away

BASICS Safety Scores

BASICS Scores
Higher = more risk · FMCSA Behavior Analysis and Safety Improvement Categories
0.7
Unsafe Driving
0.0
HOS Compliance
0.3
Driver Fitness
0.0
Controlled Substances
1.0
Vehicle Maintenance
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Frequently Asked Questions

What is USDOT Number 45597?
USDOT number 45597 is assigned to Diamond Materials Llc, an active motor carrier registered with the FMCSA, based in Wilmington, DE.
What is the safety rating of Diamond Materials Llc?
Diamond Materials Llc has a safety rating of Conditional as of May 26, 1988.
How many inspections has Diamond Materials Llc had?
Diamond Materials Llc has recorded 110 total inspections with 10 out-of-service orders, representing an OOS rate of 9.09%.
Where is Diamond Materials Llc located?
Diamond Materials Llc is headquartered at 924 S Heald St, Wilmington, DE 19801.

Data sourced from the FMCSA Open Data Portal. Updated monthly. DOT# 45597 · Last updated: 2026-03-09. View official FMCSA record →