Establishment profile
CORNERSTONE MATERIALS LLC
2600 N HWY 89, CHINO VALLEY, AZ, 86323
327991 — Cut Stone and Stone Product Manufacturing
Summary
CORNERSTONE MATERIALS LLC has accumulated 10 OSHA violations across 2 inspections over 15 years of recorded history, with $1,875 in total assessed penalties.
The establishment sits in the 60th percentile for violations within its industry-state peer group of 106 employers. Inspection frequency runs at the 74th percentile. The most recent enforcement activity was recorded 15 years ago.
Federal records were found in 2 of 15 sources. Sources without matching records returned empty for this establishment.
Agency coverage
CORNERSTONE MATERIALS LLC appears in OSHA workplace safety and MSHA mine safety records only. No matching records were found in WHD wage enforcement, EPA environmental compliance, NLRB labor relations, OFLC visa and labor certification (historical), FMCSA motor carrier registration, SAM.gov federal debarment, CMS nursing home enforcement, UVA Corporate Prosecution Registry, CPSC product recalls, or NHTSA vehicle recalls.
OSHA workplace safety
100% of inspections at this establishment produced violations,
Peer comparison
Above average violations in NAICS 3279 within AZ. Peer group: 106 employers. This establishment has 10 OSHA violations; peer median is 8.
Safety self-report (OSHA 300A)
No self-reported injury rates filed with OSHA's Injury Tracking Application for CORNERSTONE 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
No severe injury reports (hospitalization, amputation, or loss of an eye) on file under 29 CFR 1904.39 for CORNERSTONE MATERIALS LLC. Verify directly with Occupational Safety and Health Administration →
Activity timeline
No federal enforcement activity has been recorded against this establishment in 15+ years. Most recent activity: 15 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 CORNERSTONE MATERIALS LLC. Verify directly with Wage and Hour Division →
Mine safety (MSHA)
Company-level in AZ — for CORNERSTONE MATERIALS LLC, 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 CORNERSTONE MATERIALS LLC 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. 15 citations · 6S&S · 15 contractor · $1,981 proposed / $1,981 paid.
| Citation | Mine | Date | Section | S&S | Negligence | Proposed | Paid |
|---|---|---|---|---|---|---|---|
| 6586318 | Mills Yavapai, AZ contractor: Cornerstone Materials LLC | Nov 2010 | — | Yes | ModNegligence | $308 | $308 |
| 6586317 | Mills Yavapai, AZ contractor: Cornerstone Materials LLC | Nov 2010 | — | Yes | ModNegligence | $308 | $308 |
| 8829939 | Mills Yavapai, AZ contractor: Cornerstone Materials LLC | Aug 2014 | — | Yes | ModNegligence | $138 | $138 |
| 8829938 | Mills Yavapai, AZ contractor: Cornerstone Materials LLC | Aug 2014 | — | Yes | ModNegligence | $127 | $127 |
| 8829940 | Mills Yavapai, AZ contractor: Cornerstone Materials LLC | Aug 2014 | — | No | ModNegligence | $100 | $100 |
| 8598522 | Mills Yavapai, AZ contractor: Cornerstone Materials LLC | Mar 2014 | — | No | ModNegligence | $100 | $100 |
| 8755038 | Mills Yavapai, AZ contractor: Cornerstone Materials LLC | Mar 2013 | — | No | ModNegligence | $100 | $100 |
| 6585991 | Mills Yavapai, AZ contractor: Cornerstone Materials LLC | Jan 2012 | — | No | ModNegligence | $100 | $100 |
| 6585249 | Mills Yavapai, AZ contractor: Cornerstone Materials LLC | Jul 2010 | — | No | ModNegligence | $100 | $100 |
| 6585248 | Mills Yavapai, AZ contractor: Cornerstone Materials LLC | Jul 2010 | — | No | ModNegligence | $100 | $100 |
| 6454263 | Mills Yavapai, AZ contractor: Cornerstone Materials LLC | Oct 2009 | — | Yes | ModNegligence | $100 | $100 |
| 6453238 | Mills Yavapai, AZ contractor: Cornerstone Materials LLC | May 2009 | — | No | ModNegligence | $100 | $100 |
| 6453237 | Mills Yavapai, AZ contractor: Cornerstone Materials LLC | May 2009 | — | No | ModNegligence | $100 | $100 |
| 6453236 | Mills Yavapai, AZ contractor: Cornerstone Materials LLC | May 2009 | — | No | ModNegligence | $100 | $100 |
| 6453235 | Mills Yavapai, AZ contractor: Cornerstone Materials LLC | May 2009 | — | Yes | LowNegligence | $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 CORNERSTONE 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 CORNERSTONE MATERIALS LLC. Verify directly with Office of Foreign Labor Certification →
Environmental compliance (EPA)
No EPA inspections or formal enforcement actions on file for CORNERSTONE MATERIALS LLC. Verify directly with Environmental Protection Agency →
Federal criminal prosecution record
No federal criminal prosecutions, plea agreements, or deferred-prosecution agreements on file for CORNERSTONE MATERIALS LLC. Verify directly with UVA Corporate Prosecution Registry →
Inspection history
| Date | Trigger | Violations | Serious | Penalty | |
|---|---|---|---|---|---|
| 2011-04-28 | Planned | 3 | — | $0 | |
| 2011-04-28 | Planned | 7 | 1 | $1,875 |
Source: OSHA IMIS. Citation amounts reflect initially assessed penalties; final amounts after appeal may differ.
In the news
Other employers in this industry and state
Other employers in cut stone and stone product manufacturing within AZ, ordered by federal enforcement volume:
- CLINES NATURAL STONE COMPANYPHOENIX — 2 federal enforcement records
- OLD WORLD TILE & MARBLE CO., INC.SCOTTSDALE — 2 federal enforcement records
- STONE SYSTEMS OF ARIZONA, LLCPHOENIX — 2 federal enforcement records
- GRANITE MOUNTAIN ARCHITECTURAL STONEDEWEY — 1 federal enforcement record
- SALCIDO GRANITE LLCGLENDALE — 1 federal enforcement record
- LIRA STONEWORKS, LLCTUCSON — 1 federal enforcement record
- AQUARIUM DECOR INCKINGMAN — 1 federal enforcement record
- GRANITE CREATIONS, INC.MARANA — 1 federal enforcement record
- EXECUTIVE MARBLE & STONE CO.PHOENIX — 1 federal enforcement record
- WILD WEST GRANITE INC.PHOENIX — 1 federal enforcement record
Related searches
- Cut Stone and Stone Product ManufacturingAll employers in this industry
- Employers in AZState-wide enforcement data
- Cut Stone and in AZIndustry × state cross-filter
About this data
This profile aggregates federal enforcement records on CORNERSTONE 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.
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 CORNERSTONE MATERIALS LLC's OSHA violation history?
- CORNERSTONE MATERIALS LLC has 2 OSHA inspections on record with 10 violations and $1,875 in total penalties.
- How does CORNERSTONE MATERIALS LLC's safety record compare to its industry?
- CORNERSTONE MATERIALS LLC operates in the cut stone and stone product manufacturing industry. The industry average Total Recordable Incident Rate (TRIR) is 6.2.