Diamond Materials LLC (USDOT 45597)
MonitorFindings
FMCSA rating: Conditional. Compliance issues found at last review; carrier remains authorized to operate
One other active company uses this carrier’s mailing address and shares its business name, a phone number, or a company officer. Shared mailing addresses can be legitimate — subsidiaries and shared back offices are common.
- DOT number
- USDOT 45597
- Docket (MC) number
- MC76472
- Operating authority
- Common carrier authority: active. The federal bulk file showed this carrier's USDOT registration active as of Sep 19, 2026. We could not confirm that live just now.
- Authority granted
- May 26, 1982
- Insurance on file
- Liability (BIPD) insurance on file for $1,000,000.
- Safety rating
- Conditional (rating decision May 26, 1988)
- Fleet on file
- 136 power units, 117 drivers
- Operation type
- Interstate
- Physical address
- 924 S HEALD ST, WILMINGTON, DE 19801
- MCS-150 last filed
- Jul 2025
Connected carriers
Other carriers linked to this one in FMCSA registration and roadside-inspection records:
Frequently asked questions
What carrier is DOT 45597?
DOT 45597 (USDOT 45597) is Diamond Materials LLC, an interstate motor carrier.
What carrier is MC 76472?
MC 76472 is the docket number of Diamond Materials LLC, USDOT 45597.
What is Diamond Materials LLC's MC number?
Diamond Materials LLC's docket number is MC 76472. Its USDOT number is 45597.
Is Diamond Materials LLC currently authorized to operate?
Common carrier authority: active. The federal bulk file showed this carrier's USDOT registration active as of Sep 19, 2026. We could not confirm that live just now. Source: FMCSA registration and licensing records.
Does Diamond Materials LLC have insurance on file with FMCSA?
Liability (BIPD) insurance on file for $1,000,000.
Who provides Diamond Materials LLC's insurance?
Diamond Materials LLC's liability insurance is filed with FMCSA by Arch Insurance Company.
What is Diamond Materials LLC's safety record?
In the last 24 months, FMCSA records show a 8.8% vehicle out-of-service rate for Diamond Materials LLC, from 8 of 91 vehicle inspections, against a national average of 22.9% (fleetfax-computed from FMCSA inspections, as of Sep 11, 2026). FMCSA records also show 9 recordable crashes in the same window.
What is Diamond Materials LLC's CSA score?
FMCSA does not publish a single CSA score for carriers. Diamond Materials LLC's public safety data includes its roadside inspection out-of-service rates and crash record, listed on this page.
What is Diamond Materials LLC's FMCSA safety rating?
Diamond Materials LLC's FMCSA safety rating is Conditional, from a review decided May 26, 1988.
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Reconstructed from cached and fleetfax-ingested FMCSA public records, so it may be out of date. Records loaded Sep 19, 2026. Verify current status on FMCSA SAFER. fleetfax surfaces the facts; brokers make the judgment. FMCSA status