DIAMOND HILL INC. is a other heavy and civil engineering construction employer in NEW CASTLE, DE. Federal records show 2 OSHA inspections 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 3, 2026.
DIAMOND HILL INC.
501 CHURCHMANS RD., NEW CASTLE, DE, 19720
Parent: QUANTUM CORP /DE/ (1,580 locations)
237990 — Top companies in Other Heavy and Civil Engineering Construction
Industry Benchmark
Data Insights
Inspection Breakdown
Motor Carrier Safety (FMCSA)
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▶SEC Enforcement(1)
$5,000,000 totallast: 2014-01-09
SEC Enforcement(1)
SEC Litigation Releases filed against QUANTUM CORP /DE/— every public-company employer profile shows the parent's SEC enforcement history. Source: sec.gov/litigation/litreleases.
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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 HILL INC. is one of 1,580 establishments in our dataset that roll up under the parent organization QUANTUM CORP /DE/. QUANTUM CORP /DE/ is a SEC public reporter (QMCO), with most recent reported revenue of $274M.
Federal enforcement records on DIAMOND HILL INC. represent activity at this specific establishment. The full enforcement footprint of QUANTUM CORP /DE/ across all 1,580 of its tracked locations is viewable on the parent profile.
Other establishments operated by QUANTUM CORP /DE/
- DIAMOND CHEMICAL COMPANY, INC. — EAST RUTHERFORD, NJ — 3 federal records
- DIAMOND WIRE SPRING COMPANY — PITTSBURGH, PA — 3 federal records
- DIAMOND SAND AND GRAVEL INC — SPARTA, NJ — 3 federal records
- Diamond Equipment Contracting Corporation — VIRGINIA BEACH, VA — 2 federal records
- Diamond D General Engineering — Woodland, CA — 2 federal records
- DIAMOND CRYSTAL BRANDS, INC — PERRYSBURG, OH — 2 federal records
- Diamond Trucking — Peru, IN — 2 federal records
- Diamond Transportation — Springfield, VA — 2 federal records
- DIAMOND PALACE HOTEL AND CASINO CORP — SAN JUAN, PR — 2 federal records
- DIAMOND CORING COMPANY, INC. — PALATINE, IL — 2 federal records
Other employers in Other Heavy and Civil Engineering Construction within DE
- GREGGO & FERRARA, INC. — WILMINGTON — 2 federal records
- SPRING & ASSOCIATES, INC. — MIDDLETOWN — 1 federal record
- BYERS INDUSTRIAL SERVICES, LLC — WILMINGTON — 1 federal record
- SKANSKA USA CIVIL SOUTHEAST INC. — REHOBOTH BEACH — 1 federal record
- TEAL CONSTRUCTION, INC. — DOVER — 1 federal record
- DREDGE AMERICA, INC. — MILTON — 1 federal record
- NORFOLK DREDGING COMPANY — WILMINGTON — 1 federal record
- U.S. AQUA SERVICES — DELAWARE CITY
- WEEKS MARINE INC. — DELAWARE CITY
- PAVEMENT AND REHABILITATION — NEWARK
Industry context
Inspection frequency ranks in the 86th percentile.
The Bureau of Labor Statistics reports an industry-average Total Recordable Incident Rate (TRIR) of 1.2 for the other heavy and civil engineering construction sector, with a Days Away, Restricted, or Transferred (DART) rate of 0.7.
Activity timeline
No federal enforcement activity has been recorded against this establishment in the past 12 years.
Frequently Asked Questions
- What is DIAMOND HILL INC.'s OSHA violation history?
- DIAMOND HILL INC. has 2 OSHA inspections on record with 0 violations and $0 in total penalties.
- How does DIAMOND HILL INC.'s safety record compare to its industry?
- DIAMOND HILL INC. operates in the other heavy and civil engineering construction industry. The industry average Total Recordable Incident Rate (TRIR) is 1.2.
About this data
This profile aggregates federal enforcement records on DIAMOND HILL INC. of NEW CASTLE, DE from 17 federal data sources. Records were found in 5 sources: OSHA workplace safety inspections, FMCSA motor carrier safety, SEC Litigation Releases, SEC XBRL companyfacts (parent financials), and BLS industry safety benchmarks. The remaining 12 sources were checked and found no matching records: WHD, MSHA, EPA, NLRB, OFLC, OFCCP, USAspending, SAM.gov, CMS, CPSC, NHTSA, UVA.
Establishments are matched across agencies using normalized employer name, state, and ZIP code. The dataset was last refreshed on May 3, 2026. DIAMOND HILL INC. resolves to the parent rollup QUANTUM CORP /DE/, which operates 1,580 establishments in our dataset.
This profile may be incomplete if DIAMOND HILL INC.operates 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.