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Authorized · PropertyUSDOT 45597· MC76472· CARRIER· EIN 51-0373659
⬇ PDF report

DIAMOND MATERIALS LLC

924 S HEALD ST, WILMINGTON, DE, 19801(302) 658-6524diamondmaterials@diamondmaterials.comRICHARD E. PIERSON, JR
Vetting snapshot
Authority
Active
operating authority
Insurance
$1M BIPD
ARCH INSURANCE COMPANY
Vehicle OOS
8.6%
below 22% national avg
Driver OOS
2.2%
below 6.7% national avg
Crashes 24mo
9
none fatal
Red flags
None
nothing flagged
85
/ 100

Risk factors

Low riskVioCodes score
9 crashes in the last 24 months

A weighted read of the public FMCSA signals below — authority, insurance, out-of-service, crashes, roadside OOS rates, and carrier connections. A starting point for vetting, not a guarantee.

Authority & insurance

MC076472

Operating authority and insurance on file — from FMCSA Licensing & Insurance (L&I).

Common
Active
Contract
None
Broker
None
Authorized for: Property
Liability (BIPD)
$1M on file
$750K required
Cargo
Not on file
not required
Bond / surety
Not on file
not required
Insurance filings
ON FILELiability (BIPD) — BMC-91X$1M coverageeff 01/01/2012
ARCH INSURANCE COMPANY· policy ZACAT9130400
Authority history (4) ▾
05/12/2023COMMONINVOLUNTARY REVOCATION→ DISCONTINUED REVOCATION (06/20/2023)
02/15/2012MOTOR PROPERTY COMMON CARRIERREINSTATED
01/13/1995COMMONINVOLUNTARY REVOCATION→ DISCONTINUED REVOCATION (02/21/1995)
05/26/1982MOTOR PROPERTY COMMON CARRIERGRANTED→ REVOKED (02/12/2007)
Insurance history5 insurers on record
Filing timeline (4) ▾
  1. MARYLAND CASUALTY CO.$750KCancelled
    BIPD · eff 04/01/1988 → 07/23/2008
  2. SELECTIVE WAY INSURANCE COMPANY$750KCancelled
    CARGO · eff 05/23/1997 → 02/02/2007
  3. SELECTIVE INSURANCE COMPANY OF AMERICA$750KReplaced
    CARGO · eff 01/13/1995 → 05/23/1997
  4. PENNSYLVANIA MANUF. ASSOC. INS.$750KCancelled
    CARGO · eff 04/01/1987 → 01/13/1995

Source: FMCSA Licensing & Insurance (L&I), public data. This shows the carrier’s federal insurance filings (BMC-91X liability, BMC-34 cargo) — the federally-required minimums on file for operating authority — not the carrier’s full commercial policy (its actual auto combined-single-limit, general liability, cargo, or workers’ comp, which appear on the carrier’s ACORD certificate of insurance). Always confirm current coverage with a COI from the carrier’s agent before making a vetting decision.

Roadside inspection performance

Out-of-service rate vs national average. Lower is better.

Vehicle93 inspections · 8.6% OOS · National 22%
Driver136 inspections · 2.2% OOS · National 6.7%

CSA performance breakdown

FMCSA · Sep 2026

136 inspections · 24 violations (4 OOS) · 7% of inspections had an OOS finding.

136
Inspections
24
Violations
4
OOS violations
10
Distinct codes

Violations by BASIC

click to filter codes

14
total

Top cited codes

score = count × severity weight

Most inspected in · top 4 states

  • NJ14
  • MD11
  • DE4
  • PA1

Latest FMCSA SMS snapshot. Codes link to the lookup — severity weighting, contest angles, and the DataQs Drafter for each. Click a BASIC to filter the codes.

Recommendations

What’s driving each score, what to do about it, and where it could go.

A high share of violations are occurring in Cecil County, MD

Medium impact

11 of 52 violations in the last 12 months (21%) came from inspections in Cecil County, MD. That can mean tougher enforcement there or simply more of your miles run through it — either way it's worth a look.

What to do
  • Review the inspections from Cecil County, MD to spot recurring issues
  • Brief drivers running that lane; consider rerouting around the toughest enforcement corridors where practical

Speeding violations are the leading contributor to Unsafe Driving

Low impact

Estimated Unsafe Driving percentile of 40% is under the 60% line. In decent shape, but here's what's driving it.

What’s contributing15 violations (24 mo)
Speeding8 viol61%
  • 392.2-SLLS2State/Local Laws - Speeding 6-10 miles per hour over the speed limit4× · 29%
  • 392.2-SLLS3State/Local Laws - Speeding 11-14 miles per hour over the speed limit3× · 26%
  • 392.2-SLLS4State/Local Laws - Speeding 15 or more miles per hour over the speed limit1× · 6%
Following / lane / reckless6 viol37%
  • 392.2-SLLLRState/Local Laws - Lane restriction violation4× · 22%
  • 392.2-SLLFCState/Local Laws - Following too closely1× · 9%
  • 392.2-SLLTCDState/Local Laws - Failed to obey a traffic control device - Permanent or Temporary - e.g., safety official, signal, sign, light, lane marking, other1× · 6%
Other1 viol2%
  • 392.2SLTRSState/Local Laws - Truck routing restriction1× · 2%
What to do
  • Coach the drivers with speeding violations directly — Unsafe Driving points are weighted heavily
  • Set and enforce a governed road speed; review telematics/dashcam speed events weekly
Projected estimatecould improve up to 22 pts in ~12 mo
nowin 12 months
Current trend 50% followed 100% followed 60% line

Hours-of-Service Compliance needs attention

Low impact

Estimated Hours-of-Service Compliance percentile of 0% is under the 60% line. In decent shape, but here's what's driving it.

What to do
  • Review recent inspections with violations in this BASIC and take remedial action with drivers/equipment

Driver qualification / CDL / medical violations are the leading contributor to Driver Fitness

Low impact

Estimated Driver Fitness percentile of 70% is under the 75% line. In decent shape, but here's what's driving it.

What’s contributing6 violations · 4 OOS (24 mo)
Driver qualification / CDL / medical4 OOS6 viol100%
  • 383.25A1Learner's Permit (CLP) - Is not accompanied by the holder of a valid CDL that is fully authorized to operate the CMV.1× · 39%
  • 391.41APCMedical (Certificate) - Operating a property-carrying vehicle without a valid medical certificate in possession or on file with the state drivers licensing agency2× · 29%
  • 383.51A-SOUTDriving a CMV while CDL is suspended for safety-related or unknown reason and outside the state of driver's license issuance1× · 27%
What to do
  • Run a credential-expiration tracker; keep DQ files complete and the medical card on the driver
  • Prioritize the out-of-service items — they carry the heaviest weight
Projected estimatecould improve up to 37 pts in ~12 mo
nowin 12 months
Current trend 50% followed 100% followed 75% line

Controlled Substances/Alcohol needs attention

Low impact

Estimated Controlled Substances/Alcohol percentile of 0% is under the 75% line. In decent shape, but here's what's driving it.

What to do
  • Review recent inspections with violations in this BASIC and take remedial action with drivers/equipment

Tires violations are the leading contributor to Vehicle Maintenance

Low impact

Estimated Vehicle Maintenance percentile of 18% is under the 75% line. In decent shape, but here's what's driving it.

What’s contributing28 violations · 9 OOS (24 mo)
Tires7 OOS8 viol55%
  • 393.75A3-TAOLTires - All others, leaking or inflation less than 50% of the maximum inflation pressure on tire not equipped with ATIS6× · 50%
  • 393.75A4-PBMETires - Has a cut to the extent that the ply or belt material is exposed.1× · 3%
  • 393.75G-TAOWTires - All others, weight carried exceeds tire load limit1× · 2%
Brakes2 OOS7 viol24%
  • 393.53B-BAir Brake - CMV manufactured on or after 10/20/1994 has an automatic airbrake adjustment system that fails to compensate for wear2× · 7%
  • 393.45B2-BHTDAir Brake - Hose/tubing damage into the outer reinforcement ply.1× · 6%
  • 393.48A-BLMACBDDrum Brake - Loose chamber/spider/camshaft support bracket1× · 4%
Lighting / lamps4 viol11%
  • 393.9A-LHLILighting - Headlamp(s) - Any inoperative1× · 6%
  • 393.11A1-LLPLLighting - License plate lamp missing2× · 3%
  • 393.9A-LLPLLighting - License plate lamp inoperative1× · 2%
Emergency equipment5 viol5%
  • 393.95A4-EEUSEmergency Equipment - Fire Extinguishers - unsecured2× · 3%
  • 393.95A1Emergency Equipment - Fire Extinguishers - no fire extinguisher present or not properly rated.2× · 1%
  • 392.8-DDriver - Failed to inspect /use emergency equipment1× · 1%
What to do
  • Gauge and thump every tire on the walk-around, including inner duals
  • Replace before tread hits the limit; correct low pressure immediately
  • Prioritize the out-of-service items — they carry the heaviest weight
Projected estimatecould improve up to 14 pts in ~12 mo
nowin 12 months
Current trend 50% followed 100% followed 75% line

Recommendations are generated from the carrier’s public FMCSA roadside-inspection record. Percentiles and projections are VioCodes estimates, not official FMCSA figures. Informational, not legal advice.

90-day safety improvement plan

What this carrier has struggled with most in the last 90 days — where to focus now.

▲ Trending worse
20
Inspections
22
Violations
4
Out-of-service
8
Clean
Where the violations are
Vehicle Maintenance 36%Unsafe Driving 36%Other 23%Driver Fitness 5%
Focus here first
1Vehicle Maintenance
8 violations · 3 OOS · 36% of recent
  • 393.75A3-TAOL×2Tires - All others, leaking or inflation less than 50% of the maximum inflation pressure on tire not equipped with ATIS · OOS
  • 393.9A-LHLILighting - Headlamp(s) - Any inoperative
  • 393.53B-BAir Brake - CMV manufactured on or after 10/20/1994 has an automatic airbrake adjustment system that fails to compensate for wear
Do this
  • Gauge/thump every tire on the walk-around, including inner duals
  • Replace before tread hits the limit and correct low pressure immediately
2Unsafe Driving
8 violations · 36% of recent
  • 392.2-SLLLR×4State/Local Laws - Lane restriction violation
  • 392.2-SLLS2×2State/Local Laws - Speeding 6-10 miles per hour over the speed limit
  • 392.2-SLLS3State/Local Laws - Speeding 11-14 miles per hour over the speed limit
Do this
  • Coach speed and following distance — Unsafe Driving points are weighted heavily
  • Hands off the phone; always belt up
3Other
5 violations · 23% of recent
  • 393.47EBrake Out of Adjustment - Roto, Clamp (Short & Long), DD-3, or Bolt
  • 392.2-SLLTRState/Local Laws - Truck restriction
  • 392.2-SLLEWA2State/Local Laws - Excessive weight - 2501-5000 lbs over on an axle/axle groups
Do this
  • Check brake adjustment and listen for air leaks every pre-trip
  • Fix air-loss and warning-light faults before dispatch; put brakes on the PM schedule
Repeat offenders (same code, multiple times)
392.2-SLLLR×4393.75A3-TAOL×2OOS392.2-SLLS2×2
🎓
Turn these into driver coaching — and prove it
FleetTrained (my companion project) makes branded, multilingual training videos for these exact violations — your driver watches and gets a completion certificate for the file.

Based on roadside inspections in the last 90 days, ranked by what recurs most. Informational, not legal advice.

Inspection & crash map

live · FMCSA MCMIS

Every inspection and crash on record — hover a point for the summary, click for full detail (codes, severity, CSA points).

192
Inspections
115
Violations
23
Out-of-service
505
CSA points
46
Crashes
4
States
cleanviolOOS

CSA points = violation severity weight × FMCSA time weight (3× in the last 6 months, 2× at 6–12, 1× at 12–24). Points are spread within each state — FMCSA records the inspection state, not an exact location. Source: FMCSA MCMIS.

Equipment

VINs via NHTSA

56 distinct vehicles seen in this carrier’s roadside inspections.

37 incomplete vehicle 10 trailer 9 truck
2021 PETERBILT 567seen 3×
1NPCXPEX9MD738300· CL120814 DE
2017 PETERBILT 365seen 3×
1NPSXPEXXHD413947· CL117816 DE
2021 PETERBILT 567seen 3×
1NPCXPEX1MD738310· CL120882 DE
2017 PETERBILT 567seen 2×
1NPCXPEXXHD415749· E61619D MD
2015 PETERBILT 365seen 2×
1NPSXPEX9FD281597· E61624D MD
2017 PETERBILT 365seen 2×
1NPSXPEX0HD413942· CL117654 DE
2022 FORD F-550seen 2×
1FDUF5HT1NEC22032· C123228 DE
2025 WESTERN STAR 49X Chassisseen 2×
5KKHBWFM7SLVJ0100· CL124097 DE
2021 PETERBILT 567seen 2×
1XPCDP9X9MD739620· CL120817 DE
2004 PETERBILT 365seen 2×
1NPSXEPEX4HD41394· CL117649 DE
2015 MACK GU (Granite)seen 2×
1M2AX07C3FM023690· CL121916 DE
2025 KENWORTH T880
1NKZXPEX7SJ139247· CL124767 DE
2025 WESTERN STAR 49X Chassis
5KKHBWFM9SLVJ0101· CL124096 DE
2017 PETERBILT 365
1NPSXPEX2HD413943· CL117685 DE
2015 PETERBILT 365
1NPSXPEX5FD281595· CL116507 DE
2017 PETERBILT 365
1NPSXPEX8HD413946· CL117815 DE
2024 WESTERN STAR 49X Chassis
5KKHBWFM2RLVG4703· CL123842 DE
2021 PETERBILT 567
1NPCXPEX3MD738311· CL120883 DE
2023 POLAR TANK TRAILER Polar Tank Trailer
3H6KL432XP3121285· T48125 DE
2021 PETERBILT 567
1NPCXPEX3MD738308· CL120881 DE
2017 PETERBILT 365
1XPSDP9X4HD415072· CL117601 DE
2020 EAST MANUFACTURING CORP. East Manufacturing Corp
1E1D3S281LR068740· T46381 DE
2015 MAC TRAILER MANUFACTURING MAC TRAILER MANUFACTURING
5MADN4024FC030839· T78083 DE
2021 PETERBILT 567
1NPCXPEXXMD738306· CL120879 DE
2015 MACK CHU (Pinnacle)
1M1AN07Y7FM018773· CL121468 DE
2022 LANDOLL CORPORATION 440B
1LH440VH7N1B33300· T79261 DE
2018 ISUZU NPR/NPR-HD
54DC4W1B4JS800306· C137674 DE
2013 PETERBILT 567
1NPCXPEXXD415749· CL11741 DE
2019 FORD F-450
1FD9X4HT0KEG58699· C128775 DE
2021 PETERBILT 337
2NP2HJ7X8MM764352· CL121368 DE

+ 26 more.

Equipment is inferred from VINs recorded on roadside inspections (FMCSA MCMIS), decoded via the NHTSA vPIC API — it reflects vehicles inspected, not a current fleet roster.

Crash record (US, last 24 months)

Total

9

Tow-away

9

Injury

6

Fatal

0

Company profile

FMCSA census

PRIVATE PROPERTY;AUTHORIZED FOR HIRE

Power units
139
on file (MCS-150)
Drivers
117
117 hold a CDL
Annual mileage
0.7M mi
reported 2025
Recordable crash rate
—
per million miles
How far they run · drivers by operating lane
  • Interstate · <100 mi117 drivers
Company officer
RICHARD E. PIERSON, JR
Operation
Interstate · Hazmat
D-U-N-S
884222167
Registered since
1974-06-01
Last MCS-150 update
2025-07-02
Census status
Active

Fleet: 136 trucks · 19 owned tractors · 35 owned trailers.

Source: FMCSA Company Census File (data.transportation.gov). Fleet and driver counts are self-reported on the carrier’s most recent MCS-150 filing.

Connections

carrier graph

This carrier shares VINs, addresses or phone numbers with 8 other carriers — review the connections below as part of your vetting.

8
Connected carriers
5
Fleet-transfer links
1
Most shared VINs
0
Strong links
Medium· 2
DON ROGERS INC
USDOT 474014Inactive· BRIDGETON, NJ
Medium
MailingPhone
MATERIAL TRANSIT INC
USDOT 64841Inactive· WILMINGTON, DE
Medium
Address

Shared VINs come from FMCSA roadside-inspection records — a vehicle inspected under more than one carrier, often a fleet transfer or trailer interchange. Other links come from the FMCSA census. Shared identifiers are common and often legitimate — treat these as leads to investigate, not proof of wrongdoing.

Activity history

11 events
  1. 07/02/2025MCS-150 update filed

    0.7M mi reported (2025)

  2. 05/12/2023COMMON — INVOLUNTARY REVOCATION

    DISCONTINUED REVOCATION (06/20/2023)

  3. 02/15/2012MOTOR PROPERTY COMMON CARRIER — REINSTATED
  4. 01/01/2012Insurance filed — ARCH INSURANCE COMPANY

    Liability (BIPD) — BMC-91X · policy ZACAT9130400

  5. 07/23/2008Insurance cancelled — MARYLAND CASUALTY CO.

    BIPD · policy CA29414715

  6. 02/02/2007Insurance cancelled — SELECTIVE WAY INSURANCE COMPANY

    CARGO · policy SW-3207682

  7. 05/23/1997Insurance replaced — SELECTIVE INSURANCE COMPANY OF AMERICA

    CARGO · policy SW-3207682

  8. 01/13/1995COMMON — INVOLUNTARY REVOCATION

    DISCONTINUED REVOCATION (02/21/1995)

  9. 01/13/1995Insurance cancelled — PENNSYLVANIA MANUF. ASSOC. INS.

    CARGO · policy 8187005532585

  10. 05/26/1982MOTOR PROPERTY COMMON CARRIER — GRANTED

    REVOKED (02/12/2007)

  11. 06/01/1974Registered with FMCSA

    PRIVATE PROPERTY;AUTHORIZED FOR HIRE

Merged from FMCSA authority, insurance, out-of-service, and census records.

🚛

Operations

Classification

  • PRIVATE PROPERTY;AUTHORIZED FOR HIRE

Area served

  • Interstate
★

FMCSA safety rating

Rating
Conditional
Type
Non-ratable review
Rated
1988-05-26
Last review
2022-09-26
📄

MCS-150 registration

Form date
2025-07-02
Reported mileage
676,737 mi (2025)
⚡

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ⓘ
Data sourced from public FMCSA records via safer.fmcsa.dot.gov · Latest FMCSA update: Sep 2026 · Page refreshed: Sep 18, 2026, 11:06 AM. VioCodes is not affiliated with FMCSA. To dispute incorrect data, file a DataQs Request for Data Review.