FMCSA Carrier Profile
DIAMOND MATERIALS LLC
Owner / Officer: Richard E. Pierson, Jr
Active
Conditional
Authority Active
Active 14 yrs, 5 mo
Authority
Active
Common carrier
Insurance
On File
$1,000,000 BIPD
Safety
Conditional
0th pct · 50 inspections on record
✓ No risk flags found on authority or insurance records
Required Filings
Liability (BIPD)
$1,000,000
Where This Carrier Operates
States where roadside inspections were recorded
NJ31
MD10
DE7
PA2
Equipment on Record (46)
Vehicles identified in this carrier's inspection history
| VIN | Make | Inspections | With OOS |
|---|---|---|---|
| 1NPSXEPEX4HD41394 | Peterbilt | 2 | — |
| 1NPSXPEX5FD281595 | Ptrb | 2 | — |
| 1NPSXPEX7HD413940 | Peterbilt | 2 | — |
| 1NPSXPEXXHD413947 | Peterbilt | 2 | — |
| 5KKHBWFM2RLVG4703 | Wstr | 2 | — |
| 1E1D3S281LR068740 | East Dump | 1 | — |
| 1FD0W5HT5HEE73204 | Ford | 1 | — |
| 1FDUF4GT2BEC48811 | Ford | 1 | 1 |
| 1FDUF5GT5NED27755 | Ford | 1 | — |
| 1FDUF5HT1NEC22032 | Courier | 1 | — |
Showing 10 of 46 units
Vetting Notes
DIAMOND MATERIALS LLC is an active FMCSA-registered motor carrier based in Wilmington, Delaware, operating under DOT 45597. No high-severity flags were found on authority or insurance records. Across 50 FMCSA inspections on record, this carrier shows 5.7% vehicle OOS and 7.7% driver OOS. Authority and safety history are clean as of this page's last update.
FMCSA Registration
DOT Number
45597
Operating Status
Active
Safety Rating
Conditional
Entity Type
Corporation
MCS-150 Filed
July 2, 2025
FMCSA Registration
June 1, 1974
Authority Reinstated
February 15, 2012
Annual Mileage
676,737 mi (2025)
Contact Information
Address
924 S Heald St, Wilmington, DE 19801
Phone
Email
Owner / Officer
Richard E. Pierson, Jr
Officer 2
Toni Wood
Operating Authority
MC076472
Common Carrier
Insurance on File
ARCH INSURANCE COMPANY
BI&PD · $1,000,000 · Policy ZACAT9130400
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Safety Percentile
0th percentile
vs. peer carriers
✓ Below FMCSA alert threshold (65th pct) · lower percentile = fewer violations than peers · source: FMCSA SMS
Safety & Inspection Summary
Total Inspections
50
Driver Inspections
26
Vehicle Inspections
35
Total OOS Orders
4
Violations by Category
Vehicle Maintenance11
Unsafe Driving5
Hours of Service0
OOS Rates vs. National Average
Driver OOS Rate7.7% · national avg 5.5%
⚠ Above national average (2.2pp higher)
Vehicle OOS Rate5.7% · national avg 20.7%
✓ Below national average
Inspection Trend by Year
2026
2025
2024
Inspection Records (50)
| Date | State | Level | Vehicle | Viol. | Status |
|---|---|---|---|---|---|
| May 31, 2024 | MD | Level III — Driver Only | PTRB · 1NPTXPTX1DD204503 | 0 | Clean |
| March 31, 2025 | NJ | Level III — Driver Only | PTRB · 2NP2HM7X7EM244940 | 1 | Passed |
| July 31, 2024 | DE | Level II — Walk-Around | PETERBILT · 1NPSXPEX7HD413940 | 1 | Passed |
| December 31, 2024 | NJ | Level III — Driver Only | WSTR · 5KKHBWFM2RLVG4703 | 0 | Clean |
| July 30, 2024 | NJ | Level III — Driver Only | WCTR · 5KKHBWFM2RLVG4703 | 0 | Clean |
| August 30, 2024 | NJ | Level II — Walk-Around | MACK · 1M2AX07C3FM023690 | 0 | Clean |
| November 28, 2025 | NJ | Level III — Driver Only | MACK · 1M2AJ06Y25N001249 | 0 | 2 OOS |
| February 28, 2025 | DE | Level II — Walk-Around | PETERBILT · 1NPCLP0X1JD495340 | 0 | Clean |
| August 28, 2024 | PA | Level III — Driver Only | FORD · 1FT7W2B65HEC74822 | 0 | Clean |
| March 27, 2025 | NJ | Level I — Full | FORD · 1FDUF4GT2BEC48811 | 3 | 1 OOS |
| February 27, 2026 | NJ | Level II — Walk-Around | PETERBILT · 1NPSXPEXXHD413947 | 0 | Clean |
| February 27, 2026 | NJ | Level II — Walk-Around | WESTERN ST · 5KKHBWFM7SLVJ0100 | 0 | Clean |
Showing 12 of 50 inspection records
Authority History
| Date | Status | Type |
|---|---|---|
| June 20, 2023 | INVOLUNTARY REVOCATION | Common |
| February 15, 2012 | REINSTATED | Common Carrier |
| February 12, 2007 | GRANTED | Common Carrier |
| February 21, 1995 | INVOLUNTARY REVOCATION | Common |
Insurance & Revocation Filings
| Date | Type | Status |
|---|---|---|
| BI&PD Primary/Excess | Cancellation Pending | |
| January 8, 2007 | COMMON | On Record |
Other Carriers in Wilmington, DE
Data sourced from FMCSA MCMIS via Socrata. Last updated: August 12, 2026.
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