Establishment profile
DIAMOND MATERIALS, LLC
620 A STREET, WILMINGTON, DE, 19801
Operated by Noble Corp plc · 1 of 185 establishments
237310 — Highway, Street, and Bridge Construction
Summary
DIAMOND MATERIALS, LLC has accumulated 23 OSHA violations across 4 inspections over 28 years of recorded history, with $52,818 in total assessed penalties.
The establishment sits in the 100th percentile for violations within its industry-state peer group of 103 employers. Inspection frequency runs at the 97th percentile. The most recent enforcement activity was recorded 4 years ago.
Federal records were found in 2 of 15 sources. Sources without matching records returned empty for this establishment.
Agency coverage
DIAMOND MATERIALS, LLC appears in OSHA workplace safety, MSHA mine safety, EPA environmental compliance, and FMCSA motor carrier registration records only. No matching records were found in WHD wage enforcement, NLRB labor relations, OFLC visa and labor certification (historical), SAM.gov federal debarment, CMS nursing home enforcement, UVA Corporate Prosecution Registry, CPSC product recalls, or NHTSA vehicle recalls.
OSHA workplace safety
75% of inspections at this establishment produced violations, with 3 inspections producing serious-or-greater violations.
Most-cited OSHA standards
Top OSHA standards cited at this employer, ranked by citation count. Standards (CFR sections) cluster citations into safety themes -- machine guarding, lockout-tagout, hazard communication, fall protection, process safety, etc. A concentration on one or two sections reveals a pattern that individual citations don’t. 20 distinct standards shown · 20 citations in this view · $52,818 in penalties.
| CFR section | Citations | Inspections | Total penalty | First cited | Last cited |
|---|---|---|---|---|---|
| 29 CFR 1910.0219 D01 | 1 | 1 | $11,224 | Dec 2016 | Dec 2016 |
| 29 CFR 1910.0027 B07 | 1 | 1 | $6,413 | Dec 2016 | Dec 2016 |
| 29 CFR 1926.0200 G01 | 1 | 1 | $6,091 | Sep 2022 | Sep 2022 |
| 29 CFR 1926.0020 B02 | 1 | 1 | $6,091 | Sep 2022 | Sep 2022 |
| 29 CFR 1910.0022 A01 | 1 | 1 | $4,811 | Dec 2016 | Dec 2016 |
| 29 CFR 1910.0023 A02 | 1 | 1 | $4,811 | Dec 2016 | Dec 2016 |
| 29 CFR 1910.0134 F02 | 1 | 1 | $4,811 | Dec 2016 | Dec 2016 |
| 29 CFR 1910.1200 H01 | 1 | 1 | $4,811 | Dec 2016 | Dec 2016 |
| 29 CFR 1910.0023 C03 | 1 | 1 | $894 | Nov 2004 | Nov 2004 |
| 29 CFR 1910.0253 B02 IV | 1 | 1 | $715 | Nov 2004 | Nov 2004 |
| 29 CFR 1910.0023 A05 | 1 | 1 | $715 | Nov 2004 | Nov 2004 |
| 29 CFR 1910.0215 A02 | 1 | 1 | $715 | Nov 2004 | Nov 2004 |
| 29 CFR 1910.0024 H | 1 | 1 | $715 | Nov 2004 | Nov 2004 |
| 29 CFR 1926.0200 G02 | 1 | 1 | — | Sep 2022 | Sep 2022 |
| 29 CFR 1926.0021 B02 | 1 | 1 | — | Sep 2022 | Sep 2022 |
| 29 CFR 1910.0023 A09 | 1 | 1 | — | Dec 2016 | Dec 2016 |
| 29 CFR 1910.0253 B04 III | 1 | 1 | — | Nov 2004 | Nov 2004 |
| 29 CFR 1910.0303 F | 1 | 1 | — | Nov 2004 | Nov 2004 |
| 29 CFR 1910.0095 G01 | 1 | 1 | — | Nov 2004 | Nov 2004 |
| 29 CFR 1910.0215 B09 | 1 | 1 | — | Nov 2004 | Nov 2004 |
Source: OSHA inspection citations (violation_detail). CFR section codes can be looked up at osha.gov/laws-regs for the formal standard text. Per-inspection detail and the specific violation descriptions are available by expanding individual inspections below.
Peer comparison
Worse on violations than nearly every other employer in NAICS 2373 within DE. Peer group: 103 employers. This establishment has 23 OSHA violations; peer median is 0.
Safety self-report (OSHA 300A)
No self-reported injury rates filed with OSHA's Injury Tracking Application for DIAMOND MATERIALS, LLC. Verify directly with OSHA Injury Tracking Application →
Industry benchmark
BLS rates reflect industry-wide averages. Self-reported figures come from OSHA’s Injury Tracking Application; absence of self-reported data does not necessarily indicate non-compliance — many establishments fall below the ITA reporting threshold.
Inspection breakdown
Complaint- and accident-triggered inspections are stronger risk signals than routine planned inspections.
OSHA severe injury reports
Self-reported events under 29 CFR 1904.39 (24-hour notification of hospitalization, amputation, or loss of an eye) · Oct 2023
Most frequent event: Pedestrian vehicular incident, n.e.c.
Source: OSHA Severe Injury Reports (federal OSHA only; state-plan states like California, Oregon, and Washington maintain their own programs and do not consistently report into this feed).
Severe injury reports — events
Each row is a hospitalization, amputation, or eye-loss event the employer self-reported to OSHA under 29 CFR 1904.39. Narratives are written by the reporting employer.
| Date | Event | Body part | Outcome | |
|---|---|---|---|---|
| Oct 6, 2023 | Pedestrian vehicular incident, n.e.c. | Abdomen, except internal location of diseases or disorders | Hospitalized |
Source: OSHA Severe Injury Reports. Federal-OSHA jurisdiction only by default; some state-plan programs report voluntarily.
Activity timeline
No federal enforcement activity has been recorded against this establishment in 4+ years. Most recent activity: 4 years ago. Data on this page is refreshed weekly.
Wage & Hour Division (WHD)
No WHD wage, overtime, or child-labor enforcement cases on file for DIAMOND MATERIALS, LLC. Verify directly with Wage and Hour Division →
Mine safety (MSHA)
Company-level in DE — for Noble Corp plc, not this location alone
Mine Safety & Health Administration — citations issued at mining operations. MSHA records cases at the company/regional level (no worksite address), so these are matched by company name and state and may span other Noble Corp plc operations in the same state.
MSHA citations
Mine Safety and Health Administration citations. S&S (significant and substantial) marks violations that could reasonably contribute to a serious injury. Negligence rating is MSHA’s operator-culpability assessment (none, low, moderate, high, or reckless disregard). Proposed = assessed at issuance; Paid = post-settlement / appeal. 6 citations · $621 proposed / $621 paid.
| Citation | Mine | Date | Section | S&S | Negligence | Proposed | Paid |
|---|---|---|---|---|---|---|---|
| 9419692 | Diamond Materials, LLC Kent, DE | Oct 2019 | — | No | LowNegligence | $121 | $121 |
| 8927720 | Diamond Materials, LLC Kent, DE | Apr 2016 | — | No | ModNegligence | $100 | $100 |
| 8917273 | Diamond Materials, LLC Kent, DE | Dec 2015 | — | No | ModNegligence | $100 | $100 |
| 8917272 | Diamond Materials, LLC Kent, DE | Dec 2015 | — | No | HighNegligence | $100 | $100 |
| 8916060 | Diamond Materials, LLC Kent, DE | Aug 2015 | — | No | HighNegligence | $100 | $100 |
| 8916059 | Diamond Materials, LLC Kent, DE | Aug 2015 | — | No | HighNegligence | $100 | $100 |
Source: MSHA citation database. “Contractor” annotations indicate the cited party was on-site at the mine but not the mine’s operator -- responsibility attaches to the contractor LLC, not the mine’s owner. Section codes reference 30 CFR (the Mine Safety and Health regulations).
Labor relations (NLRB)
No NLRB unfair labor practice charges or union representation cases on file for DIAMOND MATERIALS, LLC. Verify directly with National Labor Relations Board →
Visa & labor certification (OFLC) — historical
No H-1B, H-2A, or H-2B labor condition applications on file (historical data only — DOL ended OFLC publication) for DIAMOND MATERIALS, LLC. Verify directly with Office of Foreign Labor Certification →
Environmental compliance (EPA)
EPA Enforcement and Compliance History — Clean Air Act, Clean Water Act, RCRA, Safe Drinking Water Act. Status: No Violation Identified.
EPA-registered facilities
Every EPA ECHO facility associated with this employer, sorted most-significant first. Each row links to EPA’s Detailed Facility Report for the source-of-truth record. Permits column lists active programs (Air = Clean Air Act, Water = Clean Water Act, RCRA = hazardous waste, TRI = Toxics Release Inventory reporting). 3 facilities.
| Facility | Permits | Status | Inspections | Formal actions | Penalties | Last inspected | ECHO |
|---|---|---|---|---|---|---|---|
DIAMOND MATERIALS LLC 924 S. HEALD ST. · WILMINGTON, DE, 19801 | AirWater | No Violation Identified | 3 | 0 | — | Jun 2026 | View → |
DIAMOND MATERIALS 929 S. HEALD STREET · WILMINGTON, DE, 19801 | Water | No Violation Identified | 0 | 0 | — | — | View → |
DIAMOND MATERIALS, LLC 924 SOUTH HEALD STREET · WILMINGTON, DE, 19801 | Air | No Violation Identified | 0 | 0 | — | — | View → |
Source: EPA ECHO (Enforcement and Compliance History Online). Compliance status follows EPA’s own labels (“Sig Violation” = significant noncompliance; QNCR = quarters of noncompliance over the recent reporting window). Inactive facilities (struck through) retain historical enforcement records even after operations ceased.
Motor carrier safety (FMCSA)
Federal Motor Carrier Safety Administration — DOT-regulated carrier registration and fleet data.
Federal criminal prosecution record
No federal criminal prosecutions, plea agreements, or deferred-prosecution agreements on file for DIAMOND MATERIALS, LLC. Verify directly with UVA Corporate Prosecution Registry →
Federal contracts
No federal contracts are recorded to this specific location.
Consolidated across all USAspending recipient entities under this corporate parent — not attributable to this single location.
Federal contract activity for the parent corporation. Source: USAspending.gov, net obligations. Recipient address is the SAM registration / HQ address, not necessarily the worksite.
Inspection history
| Date | Trigger | Violations | Serious | Penalty | |
|---|---|---|---|---|---|
| 2022-03-29 | Referral | 4 | 2 | $12,183 | |
| 2016-07-08 | Complaint | 7 | 7 | $36,881 | |
| 2004-09-30 | Planned | 12 | 8 | $3,754 | |
| 1998-03-20 | Planned | 0 | — | $0 |
Source: OSHA IMIS. Citation amounts reflect initially assessed penalties; final amounts after appeal may differ.
In the news
Part of a larger organization
DIAMOND MATERIALS, LLC is one of 185 establishments rolled up under the parent organization Noble Corp plc.
Federal enforcement records on this page represent activity at this specific establishment only. The full enforcement footprint of Noble Corp plc across all 185 of its tracked locations is viewable on the parent profile.
Other employers in this industry and state
Other employers in highway, street, and bridge construction within DE, ordered by federal enforcement volume:
- GREGGO & FERRARA INC.WILMINGTON — 2 federal enforcement records
- GREGGO & FERRARA, INC.NEW CASTLE — 2 federal enforcement records
- GEORGE & LYNCH INC.DOVER — 2 federal enforcement records
- DIAMOND MATERIALS LLCWILMINGTON — 2 federal enforcement records
- GATEWAY CONSTRUCTION, INC.LEWES — 1 federal enforcement record
- MERIT CONSTRUCTION ENGINEERS, INC.WILMINGTON — 1 federal enforcement record
- DAISY CONSTRUCTION COMPANYDOVER — 1 federal enforcement record
- A.P. CROLL & SON, INC.GEORGETOWN — 1 federal enforcement record
- DIAMOND MATERIALSNEW CASTLE — 1 federal enforcement record
- LEECO CONSTRUCTIONWILMINGTON — 1 federal enforcement record
Other locations under this parent
Other establishments operated by Noble Corp plc, ordered by federal enforcement volume:
- DIAMOND MANUFACTURING OF BLUFFTON, LTDBLUFFTON, OH — 2 federal enforcement records
- DIAMOND MATERIALS LLCWILMINGTON, DE — 2 federal enforcement records
- DIAMOND MATERIALS, LLCNEWARK, DE — 2 federal enforcement records
- DIAMOND MATTRESS INCRANCHO DOMINGUEZ, CA — 2 federal enforcement records
- DIAMOND MATERIALS, LLCKENNETT SQUARE, PA — 2 federal enforcement records
- DIAMOND M FIRE PROTECTION INCCOTTONWOOD, CA — 1 federal enforcement record
- NOBLE DRILLING SERVICES, INC.BROWNSVILLE, TX — 1 federal enforcement record
- DIAMOND MANUFACTURING COMPANYWYOMING, PA — 1 federal enforcement record
- DIAMOND METAL PRODUCTS INCANDOVER, MN — 1 federal enforcement record
- DIAMOND MOTORS OF ENGLEWOODEnglewood Cliffs, NJ — 1 federal enforcement record
Related searches
- All Noble Corp plc locationsParent rollup
- Highway, Street, and Bridge ConstructionAll employers in this industry
- Employers in DEState-wide enforcement data
- Highway, Street, and in DEIndustry × state cross-filter
About this data
This profile aggregates federal enforcement records on DIAMOND MATERIALS, LLC from every major federal compliance and enforcement source plus the UVA Corporate Prosecution Registry. OSHA workplace safety inspections, WHD wage cases, MSHA mine safety, EPA environmental enforcement, NLRB labor relations, OFLC visa/labor certification, FMCSA motor carrier registration, SAM.gov debarments, CMS nursing-home records, BLS industry safety benchmarks, OSHA ITA self-reported injury rates, SEC enforcement and financial disclosures, CPSC and NHTSA recalls.
Establishments are matched across agencies using normalized employer name, state, and ZIP code. This establishment resolves to the parent rollup Noble Corp plc, which operates 185 establishments in our dataset.
OSHA citations typically appear 3–8 months after the inspection, so very recent enforcement actions may not yet be reflected. Profiles may be incomplete if the establishment operates under multiple legal names or files under variations our entity-matching rules don’t yet cover. To report a missing record or correction, email corrections@fastdol.com.
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Contact sales →Frequently asked
- What is DIAMOND MATERIALS, LLC's OSHA violation history?
- DIAMOND MATERIALS, LLC has 4 OSHA inspections on record with 23 violations and $52,817.8 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.