DIAMOND MATERIALS LLC

WILMINGTON, DE

USDOT 45597 Active CORPORATION PRIVATE PROPERTY;AUTHORIZED FOR HIRE Hazmat Conditional rated CORPORATION Company officer: RICHARD E. PIERSON, JR Company officer 2: TONI WOOD Logs / Poles / Beams / Lumber Building Materials Machinery / Large Objects Liquids / Gases Garbage / Refuse Chemicals +2 more Based in WILMINGTON, DE Grade B · 77
Brokers & shippers · booking check

Book with caution — review signals below

No hard OOS / revoked / uninsured blocker, but elevated risk signals need a human look before booking.

Caution
Common (Property) reinstated · Feb 15, 2012
Policy effective · Jan 1, 2012
Review these
  • 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 Details →
  • BOC-3 process agent on file AMERICAN TRUCKING ASSOCIATIONS Details →
  • OOS rate better than size peers
Org: CORPORATION
Company officer: RICHARD E. PIERSON, JR
Company officer 2: TONI WOOD
Cargo: Logs / Poles / Beams / Lumber, Building Materials, Machinery / Large Objects, Liquids / Gases
Built for brokers and shippers deciding whether to tender. Always confirm on FMCSA SAFER and L&I before booking — TruckCodex mirrors public filings and can lag by up to a day.
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
Authority / census
Active · 100/100

Active census status with no OOS order or revoked authority on file.

Insurance / BIPD
BIPD active · 100/100

Active BIPD/Primary-like policy on file in our insurance history.

OOS vs peers
Mixed vs peers · 40/100

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.

FMCSA safety rating
Conditional · 45/100

Official FMCSA Conditional safety rating.

Insurance-watch tier
Not on watch · 100/100

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.

Operating authority
Insurance

ARCH INSURANCE COMPANY · 91X · $1,000,000

1 active policy

Company profile

Company details
USDOT 45597
In FMCSA records since Jun 1, 1974 (~52y)
MC / docket MC076472
Entity CORPORATION
Business org CORPORATION
Company officer RICHARD E. PIERSON, JR
Company officer 2 TONI WOOD
Operation PRIVATE PROPERTY;AUTHORIZED FOR HIRE
Hazmat Yes (MCS-150)
Cargo carried
Logs / Poles / Beams / Lumber, Building Materials, Machinery / Large Objects, Liquids / Gases, Garbage / Refuse, Chemicals, Dry Bulk, Construction
Fleet size 139 units
Drivers 117
Annual mileage 676,737 mi
Contact & address
Physical
924 S HEALD ST
WILMINGTON, DE 19801
Mailing
242 N JAMES ST SUITE 102
NEWPORT, DE 19804
Registration & safety rating
USDOT 45597
In FMCSA records since Jun 1, 1974 (~52y)
Entity CORPORATION
Operation PRIVATE PROPERTY;AUTHORIZED FOR HIRE
Annual mileage (MCS-150) 676,737 mi
Safety Rating Conditional
Hazmat Yes (MCS-150)
vs. National Average
Vehicle OOS Rate 8.1% vs 23.4% -15.3 pts
Driver OOS Rate 1.8% vs 6.7% -4.9 pts
Violations per Inspection 0.52 vs 1.80 -1.28
Peer tier (large fleets (101-1,000 power units)) median OOS rate: 19%
Active insurance
Related filings

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%).

Power Units
139
Drivers
117
Inspections
192
FMCSA roadside history
OOS Rate (peak)
8.1%
driver or vehicle, whichever higher
Crashes (24m)
6
43 all-time
Authorities
1
1 active
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.

Carrier overview

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.

Inspection profile

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.

Violation profile

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.

Fleet profile

The fleet comprises 139 power units (large fleet) and 117 drivers; Peterbilt, Western Star, and Ford are the most-inspected makes.

Risk Signals

Authority revoked
1 revocation on record.

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).

This carrier — Driver OOS
1.8%
Drivers placed out-of-service at roadside inspections
Peer median
1.5%
Median across 6,884 same-size peers
Verdict
Riskier than peers
Delta +0.3 pts vs peer median (lower is safer)
This carrier — Vehicle OOS
8.1%
Vehicles placed out-of-service at roadside inspections
Peer median
18.2%
Median across 6,884 same-size peers
Verdict
Safer than peers
Delta -10.1 pts vs peer median (lower is safer)

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)

2024-07 2026-07

Violations by BASIC Category

Federal BASIC buckets for every citation issued against this carrier over the past 24 months.

Activity by State

States this carrier has been inspected in over the past 24 months.
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
Make Model Inspections
Peterbilt 106
Ford 20
Western Star 20
Mack 12
Kenworth 8
Polar 7
Courier 2
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
  1. Jun 20, 2023
    authority
    DISCONTINUED REVOCATION — COMMON
    Details →
  2. Feb 15, 2012
    authority
    REINSTATED — MOTOR PROPERTY COMMON CARRIER
    Details →
  3. Jul 23, 2008
    insurance
    CANCEL — MARYLAND CASUALTY CO.
  4. Feb 12, 2007
    authority
    REVOKED — MOTOR PROPERTY COMMON CARRIER
    Details →
  5. Feb 12, 2007
    authority
    Authority revoked — INVOLUNTARY REVOCATION
  6. Feb 12, 2007
    authority gap
    Common (Property) authority inactive: 1829 days (through Feb 15, 2012)
  7. Feb 2, 2007
    insurance
    CANCEL — SELECTIVE WAY INSURANCE COMPANY
  8. May 23, 1997
    insurance
    TERM/REPL — SELECTIVE INSURANCE COMPANY OF AMERICA
  9. Feb 21, 1995
    authority
    DISCONTINUED REVOCATION — COMMON
    Details →
  10. Jan 13, 1995
    insurance
    CANCEL — PENNSYLVANIA MANUF. ASSOC. INS.
Top Stations & Violation Codes Where this carrier gets inspected and what they get cited for

Most-Inspected Stations

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
Directory
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Process Agent (BOC-3)
Carrier Records
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Explainers

How to verify DIAMOND MATERIALS LLC

  1. 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.
  2. 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.
  3. 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.
  4. 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.
  5. 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?
Yes. DIAMOND MATERIALS LLC is registered with the FMCSA under USDOT 45597 and is currently shown as Active in the agency's Motor Carrier Management Information System (MCMIS). Active status means the carrier may legally operate, contingent on continuous insurance and authority filings.
What is DIAMOND MATERIALS LLC's safety rating?
DIAMOND MATERIALS LLC's FMCSA safety rating is Conditional. A Conditional rating indicates the carrier did not meet the safety fitness standard during its most recent compliance review and is on notice to remediate. Safety ratings are assigned only after a formal compliance review; most carriers in the FMCSA database are unrated.
How many inspections has DIAMOND MATERIALS LLC had?
192 roadside inspections are on file for DIAMOND MATERIALS LLC in FMCSA's MCMIS database. Each inspection is summarized in the Inspection History section below — sortable by date, state, level, and out-of-service result. Newer inspections are pulled from the FMCSA SMS data feed daily.
What is DIAMOND MATERIALS LLC's out-of-service rate?
DIAMOND MATERIALS LLC's peak out-of-service rate is 8.1% (whichever is higher of driver-OOS or vehicle-OOS, computed from FMCSA roadside inspection data). The national averages are roughly 6.7% for drivers and 23.4% for vehicles — see the peer-context card on this page for a side-by-side comparison.
Where is DIAMOND MATERIALS LLC based?
DIAMOND MATERIALS LLC reports its physical address to the FMCSA as 924 S HEALD ST, WILMINGTON, Delaware 19801. Carriers must file a Form MCS-150 every two years to keep their address current; an outdated address is a common compliance flag.
Does DIAMOND MATERIALS LLC have valid operating authority?
Yes. DIAMOND MATERIALS LLC holds 1 active FMCSA operating authority (MC076472). Each docket appears in the Authority Records section below with its full event history. Active authority means the carrier may legally operate as a for-hire carrier, contingent on current insurance and BOC-3 process-agent filings.
How many trucks and drivers does DIAMOND MATERIALS LLC operate?
DIAMOND MATERIALS LLC self-reports 139 power units and 117 drivers on its most recent FMCSA Form MCS-150 filing. Power-unit and driver counts come from the carrier directly and are required to be updated every two years; very large fluctuations between filings can indicate fleet changes worth investigating.
Has DIAMOND MATERIALS LLC had any crashes?
43 FMCSA-reportable crashes are on file for DIAMOND MATERIALS LLC in MCMIS. A reportable crash is one resulting in a fatality, an injury requiring transport for medical attention, or a vehicle disabled and towed from the scene. The full crash log is on the Crashes subpage with date, state, and outcome details.

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.

Refreshed daily.

Vehicle recall campaigns, defect investigations, and consumer safety complaints (SCRS).

Refreshed daily.
EIA

Retail diesel and gasoline price history and state fuel-tax tables.

Refreshed weekly.

Cross-border carrier registry and Canadian recall campaigns where applicable.

Refreshed weekly.

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.