Fleet typeIdentity
Asset-based
136 power units. Brokers price each fleet type apart.
Carrier profile · USDOT 45597 · MC-76472
DIAMOND MATERIALS LLC
136 power unitsavg 7.9 yrRegional · 4 statesWILMINGTON, DE
CARRIER ACTIVEMC-76472 ACTIVERATED CONDITIONALHAZMAT
Observed fleet · trailing 24 mo daily
136Power units
73 observed · MCS-150
15Trailers seen
Decoded · vPIC
7.9Avg age (yr)
1998–2025 · vPIC
Click to see how we scored it
Load decision · FMCSA snapshot · 2026-06-13
Clear to load
Active authority and a clean federal record. No blocking issues found.
Active operating authorityInsurance on fileMultiple injury crashes
In good standing · 4
Active operating authorityActive for-hire authority is on file with FMCSA.Insurance on fileBIPD (liability) insurance is on file with FMCSA.Established 52 yearsOperating authority has been on file since 1974.Out-of-service rates below national averageBoth vehicle and driver OOS rates beat the national benchmark across 184 inspections.
Operating authority5252 yr active
since 1974Insurance (BIPD)On file
FMCSA L&IVehicle OOS · 24mo9.89.8 %
▼ 22.26% nat'lCrashes · fatal00
9 in 24moVektor intelligence · beyond the federal recordProprietary signals computed from VIN-decoded inspections & daily FMCSA snapshots
Fleet age vs peersTypical
7.9 yr
Model years 1998–2025 · peer benchmark computing.
Identity stabilityStable
52 yr unchanged
Same registration since 1974 — no chameleon / reincarnation signal.
AI readFull read
Is DIAMOND MATERIALS LLC safe to work with?
Is DIAMOND MATERIALS LLC safe to load? DIAMOND MATERIALS LLC (USDOT 45597, MC-76472) is an active asset-based motor carrier based in WILMINGTON, DE, operating 136 power units and 117 drivers. Operating authority has been active 52 years (past the 24-month broker-confidence threshold). Across 184 roadside inspections, its vehicle out-of-service rate is 9.8% (below the 22.26% national average), with 9 reportable crashes in the last 24 months. FMCSA rates it Conditional. Vektor rates it clear to load (94/100). Source: FMCSA SAFER/MCMIS, last updated 2026-06-13.
FMCSA fields + Vektor analysis · updated 2026-06-13
DMDIAMOND MATERIALS LLC 94
01
Safety
184 inspections · 24 mo · vs national benchmarks
Out-of-service rate· trailing 24 months vs national benchmark
Vehicle OOS 9.8% (24-mo)92 veh insp · 24-mo · nat'l 22.26%
050%nat'l 22.26%
Driver OOS 2.3% (24-mo)131 drv insp · 24-mo · nat'l 6.67%
030%nat'l 6.67%
OOS trajectory· trailing 6-mo vehicle-OOS rate vs national
10.9% now▲ Worsening
Inspection coverage· expected vs observed · the fraud signal
Inspection coverage
How heavily FMCSA inspects this fleet for its size — it tells you how much to trust the safety signals above. Thin coverage on a young authority is a fraud signal nobody else surfaces.
Under-inspected
Expected
Well-monitored
Heavily inspected
≈0.5 / unit·yr
thin signalabundant signal
Roadside-inspection volume is about what you'd expect for a 136-unit fleet — enough signal to read the safety record, though not a heavy sample.
- Registered power units
- 136
- Inspections · 24 mo
- 131
- Annualized
- ≈66 / yr
- Coverage
- ≈0.5 inspections / unit · yr
Violation themes· decoded · grouped by BASIC
What this carrier actually gets cited for — FMCSA violation codes decoded into plain English, ranked by frequency.
- 392.2 State/local traffic law violation (speeding, etc.)Unsafe Driving43
- 393.95 Emergency equipment (extinguisher, triangles)Vehicle Maintenance9
- 393.75 Tires (defective / underinflated / worn)Vehicle Maintenance8 · 7 OOS
- 393.47 Brake actuators / linings / componentsVehicle Maintenance3
- 391.41 No / expired medical certificateDriver Fitness3 · 1 OOS
- 396.3 Inspection / repair / maintenance not performedVehicle Maintenance3 · 2 OOS
- 393.45 Brake tubing / hose defectsVehicle Maintenance3 · 1 OOS
- 393.11 Required lamps/reflectors missingVehicle Maintenance2
- 390.21 USDOT number marking on vehicleUnsafe Driving2
- 393.78 Windshield wipersVehicle Maintenance2
02
Authority & insurance
Can they legally + adequately haul your load?
Operating authority· 49 CFR · per type
Operating authority
- Common
- Active
- Contract
- None
- Broker
- None
Insurance & bonds
BIPD / liability (required)Filed with FMCSA
CargoNone
Surety bond (BMC-84)None
Insurance continuity· insurer · policy · lapses
$750k BIPD · 1 insurer · 0 lapsesContinuous
Maryland · 88–08
19882008
No BIPD policy is currently in force in the filing history. The authority record may still list one on file — request a COI to confirm current coverage.
03
Equipment & fleet
VIN-decoded · NHTSA vPIC
Capacity· power units = haulable capacity; trailers are towed
- Registered power units (MCS-150)
- 136
- Observed power (24 mo)
- 73
- Trailers (towed)
- 15
Capacity is power units only — trailers are towed equipment and are never summed into a fleet-size figure.
Fleet age· model years · decoded VINs
Average age
2025
Newest model yr
1998
Oldest model yr
VINs decoded
04
Operations & lanes
Revealed by inspection density across 4 states · 24 mo
Operating footprint· revealed by roadside-inspection geography
Operating radiusRegional
revealedStates observed44
US statesInspections · 24 mo131131
NJ busiestInspection density by state· each tile = a state · shade = inspections, last 24 mo
Home base
WILMINGTON, DE
Top corridor
NJ ⇄ DE
Density
fewermore
05
Network & fraud
Affiliated entities & reincarnation signals · for review, not a verdict
Last 12 months: 1 truck also ran under 1 other carrier
VINs inspected under this carrier were recently inspected under other USDOTs too — the active double-broker / shared-equipment signal: USDOT 447013Some overlap is legitimate (leased or sold equipment); review alongside the other signals.
Show all-time history (5 trucks · 5 carriers)
Across all inspections on record: USDOT 397218USDOT 327574USDOT 405597USDOT 3306433USDOT 551415
Shares a registration email domain with other carriers
@diamondmaterials.com — 3 carriers: USDOT 474014USDOT 4027454
Capacity consistency· registered vs roadside-observed power units
Registered (MCS-150)136136
Observed (24 mo)7373
Shared w/ other carriers55
Registered capacity materially exceeds what is observed roadside — the MCS-150 may be stale or the fleet under-utilized.
06
Identity & contact
FMCSA census + L&I dossier
Location
- Physical address
- 924 S HEALD ST, WILMINGTON, DE, 19801
- Mailing address
- 242 N JAMES ST SUITE 102, NEWPORT, DE, 19804
- Operation
- Interstate· Hazmat
Contact
- Phone
- (302) 658-6524
- Fax
- (302) 658-0684
- Web domain
- diamondmaterials.com
Registration
- Officers
- Richard E. Pierson, Jr · Toni Wood
- USDOT / docket
- 45597 · MC-76472
- First registered
- 06/01/1974
- Last MCS-150
- 07/02/2025 · 676,737 mi (2025)
- FMCSA safety rating
- Conditional · 05/26/1988
- D-U-N-S
- 884222167
Fleet (self-reported · MCS-150)
07
Federal activity
Daily-captured FMCSA licensing & insurance changes — monitored by Vektor
Federal record activity· monitored daily by Vektor
No licensing or insurance changes captured since Vektor began monitoring this carrier (June 2026). Quiet is usually good.
08
Reviews
Verified broker, shipper & driver reviews — moderated
Performance ratings only — never the Vektor risk score
No verified reviews yet
Be the first broker or shipper to rate DIAMOND MATERIALS LLC. Reviews cover performance only — on-time delivery, payment speed, communication — and never affect the Vektor risk score.
Leave a review09
Frequently asked
What is DIAMOND MATERIALS LLC's USDOT number?
DIAMOND MATERIALS LLC's USDOT number is 45597, and its motor carrier number is MC-76472.
Is DIAMOND MATERIALS LLC authorized to operate?
As of 2026-06-13, DIAMOND MATERIALS LLC is active in the FMCSA register with common, contract, broker operating authority on file.
What is DIAMOND MATERIALS LLC's safety record?
DIAMOND MATERIALS LLC has a 9.8% vehicle out-of-service rate (national average 22.26%) across 184 roadside inspections, with 9 reportable crashes in the last 24 months, and an FMCSA "Conditional" safety rating. Vektor's computed risk score is 94/100 (tier: clear).
How big is DIAMOND MATERIALS LLC's fleet?
DIAMOND MATERIALS LLC operates 136 power units and 117 drivers per its most recent MCS-150 filing.
Where is DIAMOND MATERIALS LLC based?
DIAMOND MATERIALS LLC is based in WILMINGTON, DE, with roadside inspections recorded across 4 states.