Ready-mix concrete manufacturing and distributing · Michigan
Superior Materials Holdings LLC
Farmington, MI · ~226 workers · 2 years of OSHA Injury Tracking Application data.
- D
- Poor Safety Record
- 6.1
- Avg TCR
- 3.3
- Industry avg
- 0
- Fatalities
The verdict
Superior Materials Holdings LLC runs at 185% of its industry's injury rate - more dangerous than the typical Ready-mix concrete manufacturing and distributing workplace, earning a grade D.
- D
- Poor Safety Record
- 6.1
- avg TCR · per 100 workers
- 3.3
- industry benchmark (BLS)
- 24
- recordable injuries tracked
Grade compares Superior Materials Holdings LLC's OSHA Total Case Rate to the BLS industry benchmark across 2 years of Form 300A filings (2016–2024). This reflects reported recordable injuries, not an independent safety inspection -- underreporting is a known limitation of employer self-recordkeeping.
Injury rate over time
Superior Materials Holdings LLC's yearly Total Case Rate, against the 3.3 industry benchmark.
Where Superior Materials Holdings LLC falls in its industry
1,465 Ready-mix concrete manufacturi establishmentsSafer than 29% of graded establishments in this industry, whose median TCR is 4.0.
Narrower to Michigan alone (the establishments it most directly competes with for workers and contracts): ranked #35 safest of 49 Ready-mix concrete manufacturi employers in Michigan.
Superior Materials Holdings LLC has an average TCR of 6.1, which is 185% of the industry average (3.3) for Ready-mix concrete manufacturing and distributing. This is worse than average.
The letter grade is a transparent derived index PlainSafetyScore computes from public OSHA ITA and BLS benchmark data, not an official OSHA rating or safety certification. Full formula and thresholds: Methodology.
Verify This Employer with OSHA
All injury, illness, and fatality figures on this page are sourced from Superior Materials Holdings LLC's own mandatory OSHA Form 300A summaries. Cross-check the underlying establishment record directly against the federal source, name, NAICS classification, recordable case totals, and inspection history are all searchable on OSHA's Establishment-Specific Injury and Illness Data system.
Verify on OSHA Establishment SearchSource: U.S. Department of Labor, OSHA Establishment-Specific Injury and Illness Data. NAICS 327320 - Ready-mix concrete manufacturing and distributing.
DART Rate, Transparent Calculation (2024)
DART (Days Away, Restricted, or Transferred) is computed by OSHA as incidents × 200,000 ÷ hours worked. The 200,000-hour denominator equals roughly 100 full-time workers, which lets establishments of very different sizes be compared directly.
13 DART incidents × 200,000 ÷ 492,573 hours worked = 5.28 DART
Methodology: 29 CFR 1904, OSHA Form 300A recordkeeping
Cross-Validating Context, Establishment vs Industry vs State
| Benchmark | TCR | Source |
|---|---|---|
| Superior Materials Holdings LLC (this establishment) | 6.09 | OSHA ITA Form 300A, 2-year avg |
| Ready-mix concrete manufacturing and distributing industry avg | 3.30 | BLS IIF, NAICS 327320 |
| Michigan state avg (all industries) | 4.73 | OSHA ITA, state-level rollup |
Industry benchmarks: Bureau of Labor Statistics, Injuries, Illnesses, and Fatalities (IIF) program
Reportable Incident Timeline
Year-by-year reportable incidents (recordable injuries + illnesses + fatalities) submitted by Superior Materials Holdings LLC to OSHA's Injury Tracking Application. Each row anchors to OSHA's inspection records search where you can pull the underlying inspection case numbers and citations for that establishment-year.
- 2024: 15 reportable incidents · 15 injuries, 0 illnesses, 0 fatalities - OSHA inspection records (case numbers)
- 2023: 15 reportable incidents · 9 injuries, 6 illnesses, 0 fatalities - OSHA inspection records (case numbers)
Source: OSHA Inspection Information System (IMIS) - inspection case-number records
Year-by-Year Safety Data
| Year | TCR | DART | Injuries | Illnesses | Fatalities |
|---|---|---|---|---|---|
| 2024 | 6.1 | 5.3 | 15 | 0 | 0 |
| 2023 | 278.4 | 148.5 | 9 | 6 | 0 |
What this grade means for you
Use this grade as a relative read on Superior Materials Holdings LLC's reported OSHA injury record versus its Ready-mix concrete manufacturing and distributing peers, not a verdict on whether any single site is safe today.
- At 185% of the Ready-mix concrete manufacturing and distributing benchmark, Superior Materials Holdings LLC reports more injuries than typical peers, ask specifically how the employer is reducing them. Know your rights
- Judge this record against the wider Ready-mix concrete manufacturing and distributing sector, where injury rates vary widely, before comparing it in isolation. See the industry
- Grades reflect 2016–2024 filings; check the latest establishment record straight from OSHA, or look up a different employer. Look up another
Safety grades reflect employers' self-reported OSHA Form 300A filings from 2016 to 2024 and can lag current conditions. A grade is not a guarantee that any specific workplace is safe or unsafe today. See our methodology and disclaimer.
Frequently Asked Questions
What is Superior Materials Holdings LLC's safety grade?
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Read our methodology - how this data is sourced, computed, and verified.
Related
Every figure and grade on PlainSafetyScore is computed directly from OSHA's published Injury Tracking Application data and BLS industry benchmarks, no number is typed in by an editor. See our editorial standards & corrections policy, the methodology behind these safety grades, or report a data error. Data current as of 2016-2024 OSHA ITA release.