DIAMOND MATERIALS is a highway, street, and bridge construction employer in NEW CASTLE, DE. Federal records show 1 OSHA inspection with 0 violations and $0 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 2, 2026.
DIAMOND MATERIALS
33 CORPORATE CIRCLE, NEW CASTLE, DE, 19720
Parent: Noble Corp plc (107 locations)
237310 — Top companies in Highway, Street, and Bridge Construction
Industry Benchmark
Data Insights
Inspection Breakdown
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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 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-WT), with most recent reported revenue of $3.3B.
Federal enforcement records on DIAMOND MATERIALS 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 MATERIALS, LLC — NEWARK, DE — 2 federal records
- DIAMOND MANUFACTURING OF BLUFFTON, LTD — BLUFFTON, OH — 2 federal records
- DIAMOND MATERIALS, LLC — WILMINGTON, DE — 2 federal records
- DIAMOND MATTRESS INC — RANCHO DOMINGUEZ, CA — 2 federal records
- DIAMOND MATERIALS LLC — WILMINGTON, DE — 2 federal records
- DIAMOND M FIRE PROTECTION INC — COTTONWOOD, CA — 1 federal record
- 100826 - DIAMOND METAL PRODUCTS INC - MACHINING — ANDOVER, MN — 1 federal record
- DIAMOND MASONRY OF ILLINOIS, INC. — ROCKFORD, IL — 1 federal record
- NOBLE DRILLING SERVICES, INC. — BROWNSVILLE, TX — 1 federal record
- DIAMOND MANUFACTURING COMPANY — WYOMING, PA — 1 federal record
Other employers in Highway, Street, and Bridge Construction within DE
- PAOLI SERVICES, INC. — WILMINGTON — 2 federal records
- GREGGO & FERRARA, INC. — NEW CASTLE — 2 federal records
- GREGGO & FERRARA INC. — NEWPORT — 2 federal records
- GREGGO AND FERRARA, INC. — BEAR — 2 federal records
- GREGGO & FERRARA INC. — WILMINGTON — 2 federal records
- DIAMOND MATERIALS, LLC — WILMINGTON — 2 federal records
- DIAMOND MATERIALS LLC — WILMINGTON — 2 federal records
- GREGGO AND FERRARA INC. — NEWARK — 2 federal records
- DAISY CONSTRUCTION COMPANY — DOVER — 1 federal record
- LEECO CONSTRUCTION — WILMINGTON — 1 federal record
Industry context
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 16 years.
Frequently Asked Questions
- What is DIAMOND MATERIALS's OSHA violation history?
- DIAMOND MATERIALS has 1 OSHA inspection on record with 0 violations and $0 in total penalties.
- How does DIAMOND MATERIALS's safety record compare to its industry?
- DIAMOND MATERIALS 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 of NEW CASTLE, DE from 17 federal data sources. Records were found in 4 sources: OSHA workplace safety inspections, MSHA mine safety enforcement, SEC XBRL companyfacts (parent financials), and BLS industry safety benchmarks. The remaining 13 sources were checked and found no matching records: WHD, EPA, NLRB, OFLC, OFCCP, FMCSA, 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 2, 2026. DIAMOND MATERIALS resolves to the parent rollup Noble Corp plc, which operates 107 establishments in our dataset.
This profile may be incomplete if DIAMOND MATERIALSoperates 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.