Over 100 trucks: Scoped with the FileFlo compliance team and priced in writing.
Your truck was put out of service on your latest roadside inspection: Maryland on November 5.
That makes 7 of your 50 inspections in the last 24 months with an out-of-service order.
Your MCS-150 lists 139 trucks and 117 drivers.
Every violation on this list stays on your FMCSA record for 24 months and counts toward the scores FMCSA uses to choose carriers for an investigation. The investigator asks for the files behind each one.
DIAMOND MATERIALS LLC is a large fleet motor carrier based in WILMINGTON, Delaware (USDOT #45597). As of November 14, 2026, it holds a Conditional FMCSA safety rating and a FileFlo Carrier Intelligence Score of 58/100 (Elevated Risk), based on 50 recent inspection(s) and 40 recorded violation(s) in public FMCSA data.
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Turn on free alerts58/100 Elevated Risk
| Category | Score | Max |
|---|---|---|
| Safety Rating | 10 | 30 |
| Inspection Pass Rate | 15 | 20 |
| Out-of-Service Rate (vs FMCSA national avg) | 13 | 15 |
| CSA BASIC percentiles | Not measured | n/a |
Three public FMCSA components, scored by FileFlo. CSA BASIC percentiles are not in FMCSA's public data, so they are shown as not measured.
FMCSA's licensing record shows MC076472, motor property common carrier authority, reinstated on February 15, 2012.
DIAMOND MATERIALS LLC is a large fleet operating out of WILMINGTON, Delaware with USDOT number 45597. The company operates 139 power units and holds a current FMCSA safety rating of Conditional. Based on our analysis of federal safety data, DIAMOND MATERIALS LLC has a FileFlo Carrier Intelligence Score (CIS) of 58/100, classified as Elevated Risk.
DIAMOND MATERIALS LLC has undergone 50 recorded DOT inspections. The vehicle out-of-service rate is 10.0%, which is below the national average of 20.72%, suggesting solid vehicle maintenance practices. The driver out-of-service rate is 4%, within acceptable range compared to the 5.51% national average.
The public FMCSA record for DIAMOND MATERIALS LLC carries 40 recorded violations, and the most recent inspection on file is dated November 5, 2026. Across 50 recorded inspections, the record carries 2 driver out-of-service violations and 8 vehicle out-of-service violations.
A recorded violation is what an inspector wrote down at the roadside. It is not a penalty, and it is not an amount owed: FMCSA assesses civil penalties only after a compliance review classifies specific cited violations. The step that changes this record is the document behind each line, so the next move is to see which records an investigator would ask for and which of them exist today.
The Carrier Intelligence Score is FileFlo's own summary of three public FMCSA components for DIAMOND MATERIALS LLC: the safety rating, the inspection pass rate and the out-of-service rate against the national average. It is not an FMCSA score, and FMCSA does not use it to choose carriers for an investigation. 58 out of 100 falls in FileFlo's Elevated Risk band.
DIAMOND MATERIALS LLC falls under the Eastern Service Center for FMCSA field-office oversight (region code 03). Service-center territory drives which FMCSA Investigator team would conduct a new-entrant audit or compliance review if one is triggered for this carrier.
DIAMOND MATERIALS LLC is classified by FMCSA as an interstate carrier.
The carrier holds an Private Property;Authorized For Hire classification, meaning it transports cargo or passengers for compensation under FMCSA operating authority and is subject to MC-number requirements at 49 CFR Part 365.
Business organization type: Corporation.
DIAMOND MATERIALS LLC is flagged in FMCSA Census as a hazardous materials carrier (HM indicator: Y). Hazmat carriers are subject to additional regulations under 49 CFR Subchapter C, including HM-126 reporting, HM-232 security planning, and the Hazmat Cargo Tank Annual Inspection requirement (49 CFR 180.407). Hazmat violations carry their own, higher penalty schedule, separate from the general FMCSA schedule.
Operational range per MCS-150 filing: interstate within 100 miles (short-haul, 117 drivers). The 100-mile boundary matters because drivers operating within a 100-air-mile radius qualify for the short-haul exception under 49 CFR 395.1(e)(1), which removes the requirement to maintain RODS for the day.
Self-reported MCS-150 annual mileage: 676,737 miles. MCS-150 mileage feeds the FMCSA SafeStat exposure denominator: drastically understated mileage can artificially inflate CSA BASIC percentile scores by reducing the per-mile exposure baseline. Updates are required every 24 months under 49 CFR 390.19.
Owned equipment per the FMCSA Census filing: 117 straight trucks, 19 tractors, 35 trailers. Owned-vs-leased equipment matters for compliance documentation, owned trailers require the carrier to retain annual inspection certificates under 49 CFR 396.17, while leased trailers shift that documentation responsibility to the lease agreement.
The carrier reports 117 CDL-holding drivers on file. Each CDL driver must have a current Driver Qualification File (DQF) maintained per 49 CFR 391.51, including a Medical Examiner's Certificate, an annual MVR review, and a record of road-test results.
The FMCSA Motor Carrier Management Information System (MCMIS) crash dataset records 20 crash events involving DIAMOND MATERIALS LLC in the available reporting window. Of these, 0 involved a fatality, 6 involved a reported injury, and 20 resulted in a tow-away. 20 events meet the federal-recordable threshold under 49 CFR 390.5 (fatality, injury treated away from the scene, OR tow-away of any vehicle).
Most recent recorded event: 0 FEET WEST OF MILE POINT 13.370 ON MD 272 - NORTH, NORTH EAST, MD on April 20, 2026.
Inspections cluster geographically across New Jersey (22), Maryland (20), Delaware (7). The concentration in New Jersey is consistent with the carrier's primary lanes and tends to correlate with which state DOT inspector teams DIAMOND MATERIALS LLC's drivers encounter most often at roadside checkpoints.
Across the 50 recorded inspections, DIAMOND MATERIALS LLC's 10.0% vehicle out-of-service rate sits well below the FMCSA 2024 national average of 20.72%. The 4.0% driver out-of-service rate sits slightly below the 2024 national average of 5.51%.
Your last out-of-service was 9 days ago.
The self-serve Audit-Ready Setup covers carriers up to 50 power units. A fleet of 139 power units is scoped with a person: tell us how USDOT 45597 is run, how many drivers and files are in scope, and we come back with the scope and the price for that.
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| Date | State | Driver OOS | Vehicle OOS | Next step |
|---|---|---|---|---|
| 2026-11-05 | MD | 0 | 1 | Audit check |
| 2026-11-04 | NJ | 0 | 0 | Audit check |
| 2026-09-04 | PA | 0 | 0 | Audit check |
| 2026-09-03 | NJ | 0 | 0 | Audit check |
| 2026-08-25 | MD | 0 | 0 | Audit check |
| 2026-08-21 | NJ | 1 | 0 | Audit check |
| 2026-08-19 | NJ | 0 | 0 | Audit check |
| 2026-08-18 | MD | 0 | 0 | Audit check |
| 2026-08-14 | NJ | 0 | 0 | Audit check |
| 2026-08-14 | NJ | 0 | 0 | Audit check |
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DIAMOND MATERIALS LLC (USDOT #45597) holds a "Conditional" FMCSA safety rating. FileFlo's Carrier Intelligence Score for the carrier is 58/100 (Elevated Risk), derived from its safety rating, inspection pass rate, and out-of-service rate versus the FMCSA national average.
Per its most recent FMCSA MCS-150 filing, DIAMOND MATERIALS LLC operates 139 power unit(s) and 117 driver(s), classifying it as a large fleet. Fleet counts are self-reported to FMCSA and can lag a carrier's current operation.
DIAMOND MATERIALS LLC is registered with the FMCSA at a physical address in WILMINGTON, Delaware, under USDOT number 45597.
FileFlo shows 50 recent DOT inspection(s) and 40 recorded violation(s) for DIAMOND MATERIALS LLC (USDOT #45597), sourced from FMCSA public records and the Socrata transportation datasets. The inspection table on this page lists dates, states, and out-of-service counts.
DIAMOND MATERIALS LLC scores 58/100 (Elevated Risk) on FileFlo's Carrier Intelligence Score. The score normalizes three public FMCSA components (safety rating, inspection pass rate, and out-of-service rate versus the national average) into one 0-100 surface. CSA SMS BASIC percentiles are not published in FMCSA's public data and are excluded rather than estimated.
The 49 CFR sections a DOT compliance review actually checks, plain-English:
Compliance terms: CSA score · out-of-service order · hours of service · driver qualification file. See DOT compliance software & document management →
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Data sourced from FMCSA public records and the Socrata transportation dataset. Last updated: November 14, 2026. Information may not reflect the carrier's current status. Dispute this record · Claim this profile