DIAMOND MATERIALS LLC
WILMINGTON, DE
Book with caution — review signals below
No hard OOS / revoked / uninsured blocker, but elevated risk signals need a human look before booking.
- Common (Property) gap · 1829 days Inactive Feb 12, 2007 → reinstated Feb 15, 2012
- Conditional safety rating Carrier did not meet the safety fitness standard at the last compliance review.
- OOS rate worse than size peers Driver and/or vehicle out-of-service rate is above the peer median.
Plain-text risk summary (print / paste)
TruckCodex risk summary — DIAMOND MATERIALS LLC (USDOT 45597) Verdict: CAUTION Book with caution — review signals below No hard OOS / revoked / uninsured blocker, but elevated risk signals need a human look before booking. Authority / census status: Active Active BIPD limit: $1,000,000 Officer(s): RICHARD E. PIERSON, JR (Company officer); TONI WOOD (Company officer 2) Organization: CORPORATION Blockers: (none) Cautions: • Common (Property) gap · 1829 days — Inactive Feb 12, 2007 → reinstated Feb 15, 2012 • Conditional safety rating — Carrier did not meet the safety fitness standard at the last compliance review. • OOS rate worse than size peers — Driver and/or vehicle out-of-service rate is above the peer median. On file: • 1 active operating authority • Insurance on file · $1,000,000 — ARCH INSURANCE COMPANY · 91X • BOC-3 process agent on file — AMERICAN TRUCKING ASSOCIATIONS • OOS rate better than size peers Source: https://truckcodex.com/usdot/45597/ As of: Jul 18, 2026 Always confirm on FMCSA SAFER and L&I before tendering — TruckCodex mirrors public filings and can lag by up to a day.
TruckCodex · compliance grade
Compliance grade B
Composite of 5/5 scored components (mean 77/100). Expand for per-signal evidence. Heuristic — not an FMCSA rating or legal advice.
B
confidence 100% · 5/5 signals
Compliance grade B
Composite of 5/5 scored components (mean 77/100). Expand for per-signal evidence. Heuristic — not an FMCSA rating or legal advice.
Active census status with no OOS order or revoked authority on file.
Active BIPD/Primary-like policy on file in our insurance history.
Driver OOS 1.8% vs peer median 1.5% (worse). Vehicle OOS 8.1% vs peer median 18.2% (better). n=6884 same-size ACTIVE peers.
Official FMCSA Conditional safety rating.
No BMC-91 insurance-lapse watch classification on file for this USDOT.
TruckCodex compliance grade from authority, BIPD, peer OOS, FMCSA safety rating, and insurance-watch signals. Not legal advice. See methodology. Booking triage on this page: Caution.
Company profile
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InsuranceARCH INSURANCE COMPANYPolicy effective Jan 1, 2012
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Process AgentAMERICAN TRUCKING ASSOCIATIONSBOC-3 on file
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Operating AuthorityMC076472ACTIVE
Fleet details (MCS-150)
| Vehicle type | Owned | Term leased | Trip leased |
|---|---|---|---|
| Truck tractors | 19 | 0 | 0 |
| Trailers | 35 | 0 | 0 |
| Trucks | 117 | 0 | 0 |
Self-reported on the carrier’s Form MCS-150 (FMCSA Company Census).
Accident reports (24 months)
All 43 crashes →| Last 6 months | 6–12 months | 12–24 months | Total | |
|---|---|---|---|---|
| Fatalities | 0 | 0 | 0 | 0 |
| Injuries | 0 | 0 | 4 | 4 |
| Tow-away | 0 | 1 | 5 | 6 |
| Crash reports | 0 | 1 | 5 | 6 |
Reportable crashes from FMCSA MCMIS for the trailing 24 months. Counts may differ slightly from SAFER due to reporting lag.
Inspections (24 months)
All 192 inspections →| Driver | Vehicle | Hazmat | |
|---|---|---|---|
| Inspections | 128 | 128 | 2 |
| OOS inspections | 3 | 9 | 0 |
| OOS percentage | 2.34% | 7.03% | 0% |
| National average | 6.67% | 22.26% | 4.44% |
Roadside inspections in the last 24 months. National averages are FMCSA MCSAP reference rates (driver ~6.7%, vehicle ~23.4%, hazmat ~4.4%).
Carrier analysis & narrative context SEO summary, status notes, AI overview, and safety profiles
DIAMOND MATERIALS LLC is a corporation based in WILMINGTON, DE, registered with the FMCSA under USDOT 45597. The carrier is currently active in FMCSA's records, with a safety rating of Conditional. MCS-150 self-reporting puts the fleet at 139 power units and 117 drivers, with 192 roadside inspections on file and a peak out-of-service rate of 8.1%. Use this page to verify the carrier's authority and insurance, review its inspection and crash history, and cross-reference live data on FMCSA SAFER before booking a load or onboarding a partner.
Conditional safety rating
FMCSA has assigned this carrier a Conditional safety rating.
DIAMOND MATERIALS LLC is a large fleet, operating 139 power units and 117 drivers, organized as a corporation, based in Wilmington, DE. Across 121 roadside inspections in the last 24 months, the fleet recorded a 9.9% out-of-service rate, with 6 reportable crashes. BIPD/Primary insurance is on file with MARYLAND CASUALTY CO., and operating authority is active for common.
121 roadside inspections over the last 24 months, up 147% versus the prior 24 months, concentrated in NJ (66) and MD (27), with Level 2 inspections the most common.
9.9% out-of-service rate; led by Unsafe Driving (47.9% of violations); top code 392.2 (Operating a CMV while ill or fatigued) cited 10 times.
The fleet comprises 139 power units (large fleet) and 117 drivers; Peterbilt, Western Star, and Ford are the most-inspected makes.
Risk Signals
Out-of-Service rate vs same-size peers FMCSA roadside inspections, % placed out-of-service
Compared against 6,884 ACTIVE carriers operating 69–209 power units (±50% of this carrier's 139 unit fleet).
Authority gap detected (1)
- Common (Property) authority was inactive from Feb 12, 2007 to Feb 15, 2012 (1829 days)
Inspection Analytics Monthly activity · BASIC mix · state map
Monthly Inspection Activity (24 months)
Violations by BASIC Category
Activity by State
| State | Inspections | OOS | OOS % | Last Inspection |
|---|---|---|---|---|
| New Jersey (NJ) | 72 | 5 | 6.9% | Jul 15, 2026 |
| Maryland (MD) | 30 | 7 | 23.3% | Jul 10, 2026 |
| Delaware (DE) | 25 | 0 | 0.0% | Jun 25, 2026 |
| Pennsylvania (PA) | 1 | 0 | 0.0% | Aug 28, 2024 |
Vehicle Fleet Top makes and models observed in roadside inspections
SMS BASIC Scores FMCSA Safety Measurement System per-BASIC scores
| BASIC | Inspections | Serious | Measure | Percentile | Alert | As Of |
|---|---|---|---|---|---|---|
| Driver Fitness | 5 | — | 0.25 | 0 | — | Jul 13, 2026 |
| Controlled Substances / Alcohol | 0 | — | 0.00 | 0 | — | Jul 13, 2026 |
| Hours of Service | 0 | — | 0.00 | 0 | — | Jul 13, 2026 |
| Unsafe Driving | 11 | — | 0.64 | 1 | — | Jul 13, 2026 |
| Vehicle Maintenance | 23 | — | 1.58 | 2 | — | Jul 13, 2026 |
Higher percentiles indicate worse performance relative to peer carriers. Carriers at or above the FMCSA intervention threshold are marked ALERT.
Recent Inspections (192 rows) View all 192 →
| Inspection # | Date ▼ | State | Level | Station | Vehicle | Violations | Top Codes | OOS |
|---|---|---|---|---|---|---|---|---|
| 88414619 | Jul 15, 2026 | NJ | 2 | — |
KENWORTH STRAIGHT TRUCK
|
1 | 392.2-SLLEWA2 | No |
| 88387346 | Jul 10, 2026 | MD | 2 | — |
PETERBILT TRUCK TRACTOR
|
5 | 393.75A3-TAOL, 393.45B2-BHTD, 393.9A-LHLI | Yes |
| 88313768 | Jul 1, 2026 | MD | 2 | — |
PETERBILT TRUCK TRACTOR
|
0 | — | No |
| 88291671 | Jun 30, 2026 | MD | 2 | — |
PETERBILT TRUCK TRACTOR
|
0 | — | No |
| 88282404 | Jun 30, 2026 | NJ | 3 | — |
MACK STRAIGHT TRUCK
|
0 | — | No |
| 88281755 | Jun 30, 2026 | NJ | 2 | — |
PETERBILT STRAIGHT TRUCK
|
0 | — | No |
| 88254374 | Jun 25, 2026 | DE | 2 | — |
PETERBILT STRAIGHT TRUCK
|
1 | 392.2-SLLSR | No |
| 88193169 | Jun 17, 2026 | MD | 2 | — |
PETERBILT STRAIGHT TRUCK
|
0 | — | No |
| 88167763 | Jun 16, 2026 | MD | 2 | — |
PETERBILT STRAIGHT TRUCK
|
0 | — | No |
| 88167372 | Jun 16, 2026 | MD | 2 | — |
MACK STRAIGHT TRUCK
|
0 | — | No |
| 88169098 | Jun 15, 2026 | DE | 3 | — |
WESTERN STAR STRAIGHT TRUCK
|
1 | 392.2-SLLS2 | No |
| 88134252 | Jun 11, 2026 | MD | 2 | — |
PETERBILT STRAIGHT TRUCK
|
0 | — | No |
| 88066125 | Jun 5, 2026 | MD | 1 | — |
PETERBILT STRAIGHT TRUCK
|
1 | 393.78A-WS | No |
| 88020017 | Jun 2, 2026 | NJ | 1 | — |
FORD STRAIGHT TRUCK
|
0 | — | No |
| 88008463 | Jun 1, 2026 | NJ | 2 | — |
PETERBILT STRAIGHT TRUCK
|
0 | — | No |
| 87955407 | May 26, 2026 | NJ | 2 | — |
Peterbilt STRAIGHT TRUCK
DE CL11741
·
1NPCXPEXXD415749
|
0 | — | No |
| 87862488 | May 15, 2026 | NJ | 2 | — |
PETERBILT STRAIGHT TRUCK
|
0 | — | No |
| 87818561 | May 12, 2026 | NJ | 3 | — |
MACK TRUCK TRACTOR
|
0 | — | No |
| 87793742 | May 8, 2026 | NJ | 3 | — |
WESTERN STAR STRAIGHT TRUCK
|
0 | — | No |
| 87773798 | May 6, 2026 | NJ | 2 | — |
PETERBILT STRAIGHT TRUCK
|
0 | — | No |
| 87767871 | May 4, 2026 | MD | 2 | — |
PETERBILT TRUCK TRACTOR
|
2 | 393.75A3-TAOL, 393.45D-BHTBS | Yes |
| 87668758 | Apr 21, 2026 | NJ | 2 | NJ |
PETERBILT TRUCK TRACTOR
|
0 | — | No |
| 87607178 | Apr 14, 2026 | NJ | 2 | NJ |
PETERBILT STRAIGHT TRUCK
|
0 | — | No |
| 87605622 | Apr 14, 2026 | NJ | 3 | NJ |
PETERBILT STRAIGHT TRUCK
|
0 | — | No |
| 87458381 | Apr 1, 2026 | DE | 3 | DOVER DE |
PETERBILT TRUCK TRACTOR
|
1 | 392.2-SLLS2 | No |
Recent Crashes (43 rows) View all 43 →
| Report # | Date ▼ | State | Fatalities | Injuries | Tow | Hazmat | Severity |
|---|---|---|---|---|---|---|---|
| MD25A1285903 | Aug 27, 2025 | MD | 0 | 0 | Yes | No | Tow |
| NJ0006852710 | Apr 24, 2025 | NJ | 0 | 1 | Yes | No | Injury |
| NJ0006535333 | Feb 18, 2025 | NJ | 0 | 1 | Yes | No | Injury |
| NJ0006081953 | Feb 18, 2025 | NJ | 0 | 0 | Yes | No | Tow |
| PA410734600X | Nov 12, 2024 | PA | 0 | 1 | Yes | No | Injury |
| DE0924072614 | Nov 12, 2024 | DE | 0 | 1 | Yes | No | Injury |
| NJ0023205000 | Aug 10, 2023 | NJ | 0 | 0 | Yes | No | Tow |
| NJ0023116238 | Feb 7, 2023 | NJ | 0 | 0 | Yes | No | Tow |
| DE0322045102 | Aug 4, 2022 | DE | 0 | 0 | Yes | No | Tow |
| PA107498100X | Jul 15, 2021 | PA | 0 | 0 | Yes | No | Tow |
| DE0620101131 | Dec 2, 2020 | DE | 0 | 0 | Yes | No | Tow |
| DE0620068254 | Aug 17, 2020 | DE | 0 | 2 | Yes | No | Injury |
| DE0620068109 | Aug 16, 2020 | DE | 0 | 0 | Yes | No | Tow |
| NJ0020916974 | Aug 11, 2020 | NJ | 0 | 0 | Yes | No | Tow |
| DE0120048708 | Jun 15, 2020 | DE | 0 | 0 | Yes | No | Tow |
| NJ0020900526 | Jan 10, 2020 | NJ | 0 | 0 | Yes | No | Tow |
| PA910652800X | Sep 20, 2019 | PA | 0 | 0 | Yes | No | Tow |
| PA903530400X | Mar 29, 2019 | PA | 0 | 1 | Yes | No | Injury |
| PA812237500X | Nov 13, 2018 | PA | 0 | 1 | No | No | Injury |
| DE0118053579 | May 30, 2018 | DE | 0 | 0 | Yes | No | Tow |
| DE0218044779 | May 7, 2018 | DE | 0 | 0 | Yes | No | Tow |
| NJ0017943206 | Nov 3, 2017 | NJ | 0 | 2 | Yes | No | Injury |
| MD17A0443735 | Oct 10, 2017 | MD | 0 | 0 | Yes | No | Tow |
| MD17A0444044 | Mar 17, 2017 | MD | 0 | 0 | Yes | No | Tow |
| DE0916068117 | Nov 3, 2016 | DE | 0 | 1 | Yes | No | Injury |
Authority Records (1 docket)
Insurance Coverage Timeline (5 rows)
Every insurance policy on file, newest effective date first. Amber rows mark BIPD/Primary coverage gaps.
| Insurer | Policy # | Type | Limit | Effective | Cancel | Status |
|---|---|---|---|---|---|---|
| ARCH INSURANCE COMPANY | ZACAT9130400 | 91X | $1,000,000 | Jan 1, 2012 | On file | ACTIVE |
| SELECTIVE WAY INSURANCE COMPANY | SW-3207682 | CARGO | — | May 23, 1997 | Feb 2, 2007 | CANCELLED |
| SELECTIVE INSURANCE COMPANY OF AMERICA | SW-3207682 | CARGO | — | Jan 13, 1995 | May 23, 1997 | REPLACED |
| MARYLAND CASUALTY CO. | CA29414715 | BIPD | — | Apr 1, 1988 | Jul 23, 2008 | CANCELLED |
| PENNSYLVANIA MANUF. ASSOC. INS. | 8187005532585 | CARGO | — | Apr 1, 1987 | Jan 13, 1995 | CANCELLED |
Compliance Timeline Merged authority / insurance / enforcement events
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Jun 20, 2023
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Feb 15, 2012
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Jul 23, 2008insuranceCANCEL — MARYLAND CASUALTY CO.
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Feb 12, 2007
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Feb 12, 2007authorityAuthority revoked — INVOLUNTARY REVOCATION
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Feb 12, 2007authority gapCommon (Property) authority inactive: 1829 days (through Feb 15, 2012)
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Feb 2, 2007insuranceCANCEL — SELECTIVE WAY INSURANCE COMPANY
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May 23, 1997insuranceTERM/REPL — SELECTIVE INSURANCE COMPANY OF AMERICA
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Feb 21, 1995
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Jan 13, 1995insuranceCANCEL — PENNSYLVANIA MANUF. ASSOC. INS.
Top Stations & Violation Codes Where this carrier gets inspected and what they get cited for
Most-Inspected Stations
| Station | State | Inspections | OOS |
|---|---|---|---|
| CARNEYS POINT SCALE | NJ | 14 | 0 |
| NJ | NJ | 12 | 1 |
| MIDDLETOWN DE | DE | 11 | 2 |
| CECIL COUNTY | MD | 8 | 2 |
| CARNEYS POINT | NJ | 8 | 0 |
| DARLINGTON MD | MD | 7 | 3 |
| CARNEY'S POINT SCALE | NJ | 7 | 0 |
| I-95 NORTHBOUND SCALE FACILITY | MD | 5 | 1 |
| DOVER DE | DE | 4 | 0 |
| TOWNSEND DE | DE | 4 | 0 |
Top Violation Codes Cited
| Code | Description | Category | Cited | OOS |
|---|---|---|---|---|
| 392.2 | Violation of Local Laws - Explain: | Unsafe Driving | 21 | 0 |
| 393.9(a) | Inoperable required lamps | Vehicle Maintenance | 2 | 2 |
| 177.834(a) | Package not secure in vehicle | Hazardous Materials | 1 | 1 |
| 383.23(a)(2) | Operating a CMV without a CDL | Driver Fitness | 1 | 1 |
| 391.41(a)(1) | 391.41(a)(1) | Driver Fitness | 1 | 0 |
| 393.11 | No or defective lighting devices or reflective material as required | Vehicle Maintenance | 1 | 0 |
| 393.130(b) | Item not properly prepared for transport | Vehicle Maintenance | 1 | 1 |
| 393.43 | No/improper breakaway or emergency braking | Vehicle Maintenance | 1 | 1 |
| 393.45(b)(2) | Brake hose or tubing chafing and/or kinking | Vehicle Maintenance | 1 | 0 |
| 393.45(d) | Brake connections with leaks or constrictions | Vehicle Maintenance | 1 | 0 |
Related Records Cross-references to every adjacent page
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Delaware carriers
All carriers based in Delaware
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Wilmington carriers
Carriers based in Wilmington, DE
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Stations in Delaware
Where this carrier might be inspected
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Docket MC076472
common · ACTIVE · MC
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ARCH INSURANCE COMPANY
91X policy on file
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SELECTIVE WAY INSURANCE COMPANY
CARGO policy on file
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SELECTIVE INSURANCE COMPANY OF AMERICA
CARGO policy on file
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MARYLAND CASUALTY CO.
BIPD policy on file
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PENNSYLVANIA MANUF. ASSOC. INS.
CARGO policy on file
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AMERICAN TRUCKING ASSOCIATIONS
BOC-3 process agent · 2,554 carriers served
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192 inspections
Full roadside inspection history
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43 reportable crashes
FMCSA MCMIS crash log
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Fleet recall search
NHTSA recalls covering this fleet's vehicle years/makes
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Insurance-lapse watch
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How FMCSA safety ratings work
BASIC percentiles and compliance review context
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FMCSA compliance filings guide
MCS-150, insurance, and authority filing requirements
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Roadside inspection rights
What drivers and carriers can expect during a stop
How to verify DIAMOND MATERIALS LLC
- Verify USDOT and MC numbers match the carrier's documents. Compare the USDOT number and MC docket on this page to the numbers on the carrier's invoice, rate confirmation, or load-board listing. A mismatch between the carrier's claimed numbers and the registered legal name is the single most common red flag.
- Check active operating authority and insurance status. Confirm the Authority Records show at least one ACTIVE docket for the type of operation you're booking, and that the Active Insurance card lists a current BIPD/Primary policy. A revoked authority or uninsured carrier cannot legally operate.
- Review safety rating and SMS BASIC scores. Check the carrier's FMCSA safety rating (if any) and the SMS BASIC table. A high percentile in any BASIC category — especially Unsafe Driving, HOS, or Vehicle Maintenance — is worth investigating before tendering a load.
- Examine inspection and crash history. Open the Inspection History and Crash History subpages for the full record. Look for patterns: repeat OOS findings on the same unit, multiple crashes in a short window, or violations clustered in one BASIC category.
- Cross-reference real-time data with FMCSA SAFER. For the most current snapshot — within 24 hours of any insurer filing or authority change — click through to the FMCSA SAFER lookup. TruckCodex mirrors SAFER and L&I daily; SAFER itself reflects filings within 24 hours.
Frequently asked questions about DIAMOND MATERIALS LLC
Is DIAMOND MATERIALS LLC an active motor carrier? ▾
What is DIAMOND MATERIALS LLC's safety rating? ▾
How many inspections has DIAMOND MATERIALS LLC had? ▾
What is DIAMOND MATERIALS LLC's out-of-service rate? ▾
Where is DIAMOND MATERIALS LLC based? ▾
Does DIAMOND MATERIALS LLC have valid operating authority? ▾
How many trucks and drivers does DIAMOND MATERIALS LLC operate? ▾
Has DIAMOND MATERIALS LLC had any crashes? ▾
About FMCSA carrier records
Every commercial motor carrier operating in the United States is required to register with the Federal Motor Carrier Safety Administration (FMCSA) and obtain a USDOT number. The USDOT number is a permanent, unique identifier — once assigned, it stays with the carrier for life and is never reissued to another company. Carriers must update their registration every two years on Form MCS-150 to keep their address, fleet size, and operating data current.
Carrier safety data lives in FMCSA's Motor Carrier Management Information System (MCMIS): roadside inspections, crashes, out-of-service findings, and the seven Behavior Analysis and Safety Improvement Categories (BASICs) that make up the SMS scoring methodology. For-hire carriers must also hold operating authority — an MC, FF, or MX docket number — which is separate from the USDOT number and requires continuous insurance and BOC-3 process-agent filings to remain active.
TruckCodex mirrors FMCSA's public SAFER and L&I systems on a daily refresh cycle. Every record on this page reflects what FMCSA has on file. We do not edit or modify carrier data — for real-time confirmation immediately before a transaction, click through to the FMCSA SAFER lookup linked in the related records section above. Safety ratings, when present, come from formal compliance reviews; most active carriers have not been reviewed and are correctly listed as unrated.
Data sources & freshness
TruckCodex aggregates official public-sector datasets. See the Source registry for dataset-level coverage and the Freshness log for last-import timestamps.
Census, SAFER, SMS, Licensing & Insurance (L&I), roadside inspections, crashes, and authority history.
Vehicle recall campaigns, defect investigations, and consumer safety complaints (SCRS).
Cross-border carrier registry and Canadian recall campaigns where applicable.
TruckCodex is an independent aggregator; it is not affiliated with FMCSA, NHTSA, EIA, or Transport Canada. Always verify compliance-critical information directly with the originating agency.