Rock crushing machinery, portable, manufacturing · South Carolina
Master Machine Works, Inc.
Spartanburg, SC · ~33 workers · 4 years of OSHA Injury Tracking Application data.
- A
- Excellent Safety Record
- 0.9
- Avg TCR
- 3.3
- Industry avg
- 0
- Fatalities
The verdict
Master Machine Works, Inc. runs at 27% of its industry's injury rate - far safer than the typical Rock crushing machinery, portable, manufacturing workplace, earning a grade A.
- A
- Excellent Safety Record
- 0.9
- avg TCR · per 100 workers
- 3.3
- industry benchmark (BLS)
- 1
- recordable injuries tracked
Grade compares Master Machine Works, Inc.'s OSHA Total Case Rate of 0.9 to the Rock crushing machinery, portable, manufacturing BLS benchmark of 3.3 (27% of benchmark) across 4 years of Form 300A filings (2016–2024). <a href="/methodology">See methodology</a> for reporting-limitation caveats.
Injury rate over time
Master Machine Works, Inc.'s yearly Total Case Rate, against the 3.3 industry benchmark.
Where Master Machine Works, Inc. falls in its industry
417 Rock crushing machinery, porta establishmentsSafer than 90% of graded establishments in this industry, whose median TCR is 3.8.
Narrower to South Carolina alone (the establishments it most directly competes with for workers and contracts): ranked #3 safest of 8 Rock crushing machinery, porta employers in South Carolina.
Trend analysis for Master Machine Works, Inc.
Between 2019 and 2023, Master Machine Works, Inc.'s Total Case Rate improved from 3.5 to 0.0 recordable injuries per 100 full-time workers, a 100% decrease across 4 years of OSHA reporting.
The safest year on record was 2020, at a TCR of 0.0, while 2019 saw the highest rate, at 3.5, a spread of 3.5 points between the best and worst reporting years. That's a wide swing relative to the establishment's overall rate, worth checking the year-by-year table below for whether a single severe year is driving the average, rather than a sustained trend.
Summed across those 4 reporting years, Master Machine Works, Inc. recorded 1 total injuries and illnesses, with no fatalities reported in any of those years. Readers comparing establishments should weigh the 4-year trend above alongside establishment size, since a larger workforce naturally accumulates more raw incidents even at a lower per-100-worker rate.
Verify This Employer with OSHA
The 1 injuries shown on this page for Master Machine Works, Inc. are sourced from its own 4 years of 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 333120 - Rock crushing machinery, portable, manufacturing.
DART Rate, Transparent Calculation (2023)
What is the DART rate formula?
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.
0 DART incidents × 200,000 ÷ 62,661 hours worked = 0.00 DART
Methodology: 29 CFR 1904, OSHA Form 300A recordkeeping
Cross-Validating Context, Establishment vs Industry vs State
| Benchmark | TCR | Source |
|---|---|---|
| Master Machine Works, Inc. (this establishment) | 0.88 | OSHA ITA Form 300A, 4-year avg |
| Construction machinery manufacturing industry avg | 3.30 | BLS IIF, NAICS 333120 |
| South Carolina state avg (all industries) | 4.08 | 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 Master Machine Works, Inc. 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.
- 2023: 0 reportable incidents · 0 injuries, 0 illnesses, 0 fatalities - OSHA inspection records (case numbers)
- 2022: 0 reportable incidents · 0 injuries, 0 illnesses, 0 fatalities - OSHA inspection records (case numbers)
- 2020: 0 reportable incidents · 0 injuries, 0 illnesses, 0 fatalities - OSHA inspection records (case numbers)
- 2019: 1 reportable incidents · 1 injuries, 0 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 |
|---|---|---|---|---|---|
| 2023 | 0.0 | 0.0 | 0 | 0 | 0 |
| 2022 | 0.0 | 0.0 | 0 | 0 | 0 |
| 2020 | 0.0 | 0.0 | 0 | 0 | 0 |
| 2019 | 3.5 | 3.5 | 1 | 0 | 0 |
What this grade means for you
Use this grade as a relative read on Master Machine Works, Inc.'s reported OSHA injury record, strong versus its Rock crushing machinery, portable, manufacturing peers, but not a guarantee about any single site today.
- At 27% of the Rock crushing machinery, portable, manufacturing benchmark, Master Machine Works, Inc. reports fewer injuries than typical peers, still worth asking how safety is managed day to day. Know your rights
- Judge this record against the wider Rock crushing machinery, portable, manufacturing 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 Master Machine Works, Inc.'s safety grade?
How many injuries has Master Machine Works, Inc. reported?
Similar Employers
Matched by safety record across the industry, by workforce size within South Carolina, and by nearby establishments in Spartanburg - a different peer set than the category browse links below.
Similar TCR (~0.9)
Similar size (~33 workers)
Read our methodology - how this data is sourced, computed, and verified.
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.