DIAMOND MATERIALS, LLC is a highway, street, and bridge construction employer in WILMINGTON, DE. Federal records show 4 OSHA inspections with 11 violations and $49,063 in penalties. All data sourced from public federal enforcement records.
Data sourced from OSHA, DOL WHD, MSHA, EPA ECHO, NLRB, FMCSA, OFLC, BLS, SAM.gov, CMS, USAspending, CPSC, NHTSA, and the UVA Corporate Prosecution Registry. Last updated: May 1, 2026.
DIAMOND MATERIALS, LLC
620 A STREET, WILMINGTON, DE, 19801
Parent: Noble Corp plc (107 locations)
237310 — Top companies in Highway, Street, and Bridge Construction
Industry Benchmark
Data Insights
Inspection Breakdown
Peer Comparison
Environmental Compliance (EPA)
Motor Carrier Safety (FMCSA)
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Inspection History
No inspection records found.
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Data aggregated from public federal enforcement and program records (OSHA, WHD, MSHA, EPA, NLRB, FMCSA, OFLC, BLS, SAM.gov, CMS, USAspending, CPSC, NHTSA) plus the UVA Corporate Prosecution Registry. Employer profiles matched by name and location — matching errors may occur. Risk scores computed by FastDOL, not official government assessments. OSHA citations typically appear 3-8 months after the inspection, so very recent enforcement actions may not yet be reflected. Data provided as-is. Report a data error.
Part of a larger organization
DIAMOND MATERIALS, LLC is one of 107 establishments in our dataset that roll up under the parent organization Noble Corp plc. Noble Corp plc is a SEC public reporter (NE-WTA), with most recent reported revenue of $3.3B.
Federal enforcement records on DIAMOND MATERIALS, LLC represent activity at this specific establishment. The full enforcement footprint of Noble Corp plc across all 107 of its tracked locations is viewable on the parent profile.
Other establishments operated by Noble Corp plc
- DIAMOND MANUFACTURING OF BLUFFTON, LTD — BLUFFTON, OH — 2 federal records
- DIAMOND MATERIALS LLC — WILMINGTON, DE — 2 federal records
- DIAMOND MATERIALS, LLC — NEWARK, DE — 2 federal records
- DIAMOND MATTRESS INC — RANCHO DOMINGUEZ, CA — 2 federal records
- NOBLE DRILLING SERVICES, INC. — BROWNSVILLE, TX — 1 federal record
- DIAMOND MATERIALS, LLC — KENNETT SQUARE, PA — 1 federal record
- Diamond Mold — Salt Lake City, UT — 1 federal record
- DIAMOND MANUFACTURING COMPANY — WYOMING, PA — 1 federal record
- 110110 - DIAMOND METAL PRODUCTS INC — ANDOVER, MN — 1 federal record
- DIAMOND M FIRE PROTECTION INC — COTTONWOOD, CA — 1 federal record
Other employers in Highway, Street, and Bridge Construction within DE
- DIAMOND MATERIALS LLC — WILMINGTON — 2 federal records
- GREGGO & FERRARA INC. — NEWPORT — 2 federal records
- GREGGO AND FERRARA, INC. — BEAR — 2 federal records
- PAOLI SERVICES, INC. — WILMINGTON — 2 federal records
- GREGGO & FERRARA, INC. — NEW CASTLE — 2 federal records
- GREGGO & FERRARA INC. — WILMINGTON — 2 federal records
- GREGGO AND FERRARA INC. — NEWARK — 2 federal records
- GATEWAY CONSTRUCTION, INC. — LEWES — 1 federal record
- STRAIGHT LINE SOLUTIONS, LLC — WILMINGTON — 1 federal record
- DIAMOND MATERIALS — NEW CASTLE — 1 federal record
Industry context
Within the highway, street, and bridge construction industry in DE, DIAMOND MATERIALS, LLC ranks in the 99th percentile of OSHA violation frequency across 102 comparable establishments. That places this employer among the highest-violation establishments in its peer set.
OSHA penalty totals rank in the 95th percentile of the same peer group. Inspection frequency ranks in the 98th percentile.
The Bureau of Labor Statistics reports an industry-average Total Recordable Incident Rate (TRIR) of 2.5 for the highway, street, and bridge construction sector, with a Days Away, Restricted, or Transferred (DART) rate of 1.5.
Activity timeline
No federal enforcement activity has been recorded against this establishment in the past 24 months.
Frequently Asked Questions
- What is DIAMOND MATERIALS, LLC's OSHA violation history?
- DIAMOND MATERIALS, LLC has 4 OSHA inspections on record with 11 violations and $49,063 in total penalties.
- How does DIAMOND MATERIALS, LLC's safety record compare to its industry?
- DIAMOND MATERIALS, LLC operates in the highway, street, and bridge construction industry. The industry average Total Recordable Incident Rate (TRIR) is 2.5.
About this data
This profile aggregates federal enforcement records on DIAMOND MATERIALS, LLC of WILMINGTON, DE from 17 federal data sources. Records were found in 6 sources: OSHA workplace safety inspections, MSHA mine safety enforcement, EPA ECHO environmental compliance, FMCSA motor carrier safety, SEC XBRL companyfacts (parent financials), and BLS industry safety benchmarks. The remaining 11 sources were checked and found no matching records: WHD, NLRB, OFLC, OFCCP, USAspending, SAM.gov, CMS, CPSC, NHTSA, UVA, SEC enforcement.
Establishments are matched across agencies using normalized employer name, state, and ZIP code. The dataset was last refreshed on May 1, 2026. DIAMOND MATERIALS, LLC resolves to the parent rollup Noble Corp plc, which operates 107 establishments in our dataset.
This profile may be incomplete if DIAMOND MATERIALS, LLCoperates under multiple legal names, files under variations our entity-matching rules don't yet cover, or maintains records below current matching thresholds. To report a missing record or correction, email corrections@fastdol.com.