Plumbing and heating contractors · Michigan
John Darr Mechanical
Ann Arbor, MI · ~36 workers · 8 years of OSHA Injury Tracking Application data.
- A
- Excellent Safety Record
- 1.2
- Avg TCR
- 2.8
- Industry avg
- 0
- Fatalities
The verdict
John Darr Mechanical runs at 41% of its industry's injury rate - far safer than the typical Plumbing and heating contractors workplace, earning a grade A.
John Darr Mechanical: 1.2 TCR = 41% of Plumbing and heating contractors BLS 2.8 · 8y Form 300A (see methodology below)
John Darr Mechanical safety composite
John Darr Mechanical scores strongest on total case rate (tcr) (safer than 84% of same-industry peers) and weakest on dart rate (safer than 40%), blended into one 0-100 breakdown against same-industry peers. A missing measure drops out and redistributes its weight rather than deflating the score. This is a per-dimension breakdown, distinct from the single letter grade above it (which weights TCR alone against the BLS industry benchmark).
60/100
Percentile-weighted across 3 of 3 measures
- Total Case Rate (TCR)
- B 1.16 per 100 workers
Safer than 84% of industry peers
- DART rate
- D 1.91 per 100 workers
Safer than 40% of industry peers
- Fatalities
- D 0
Safer than 51% of industry peers
Benchmarked live against every credibly-rated employer in the same NAICS industry code in the current OSHA extract (a segment must have at least 8 rated peers to benchmark). Not a legal or compliance determination; PlainSafetyScore's own weighting (TCR 40%, DART 35%, fatalities 25%).
TCR Δ
−1.4
2017→2024
John Darr Mechanical injury rate improved
John Darr Mechanical's TCR fell 1.4 from 3.3 in 2017 to 1.9 in 2024. Peak filing year was 2017 at 3.3 TCR. In 2024, DART was 1.65× this establishment's average TCR (severity share of cases).
2017=3.3 · 2018=2.1 · 2019=2.0 · 2020=0.0 · 2021=0.0 · 2022=0.0 · 2023=0.0 · 2024=1.9
OSHA ITA Form 300A scorecard
Establishment book 238220 · Ann Arbor, MI AT/BELOW-IND · SMALL
Grade A · TCR 1.2 · 41% of ind
- DART 1.9 DART
- RANK #30/153
- PHOTO 129005 - CFS Job Co…
- BOOK 8y book
- INJ 4 inj
- SIZE ~36 FTE
Nearest TCR peer: 129005 - CFS Job Cost Quad Cities (0.0 TCR gap)
Read with this employer → · Industry book → · Michigan employers → · Look up another →
John Darr Mechanical in the TCR neighbourhood
Average Total Case Rate among this establishment and nearest same-industry peers
- This site
John Darr Mechanical
1.2 TCR
- 129005 - CFS
129005 - CFS Job Cost Quad Cities
1.2 TCR
- Southern Mecha
Southern Mechanical, Inc.
1.2 TCR
- NTD Mechanical
NTD Mechanical
1.2 TCR
- Afgo Mechanica
Afgo Mechanical Services
1.2 TCR
What this shows John Darr Mechanical averages 1.2 TCR (41% of the Plumbing and heating contractors BLS benchmark).
John Darr Mechanical TCR series: 2017=3.3 · 2018=2.1 · 2019=2 · 2020=0 · 2021=0 · 2022=0 · 2023=0 · 2024=1.9 · BLS 2.8
Where John Darr Mechanical falls in its industry
5,793 Plumbing and heating contracto establishmentsSafer than 84% of graded establishments in this industry, whose median TCR is 3.3.
Narrower to Michigan alone (the establishments it most directly competes with for workers and contracts): ranked #30 safest of 153 Plumbing and heating contracto employers in Michigan.
John Darr Mechanical has fewer employees than the Plumbing and heating contractors median and a lower injury rate than the industry's median TCR of 3.3. Workforce size and injury rate do not always move together within the same industry -- some of its smaller peers run higher rates than its larger ones, and vice versa.
Year-by-Year Safety Data
| Year | TCR | DART | Injuries | Illnesses | Fatalities |
|---|---|---|---|---|---|
| 2024 | 1.9 | 1.9 | 1 | 0 | 0 |
| 2023 | 0.0 | 0.0 | 0 | 0 | 0 |
| 2022 | 0.0 | 0.0 | 0 | 0 | 0 |
| 2021 | 0.0 | 0.0 | 0 | 0 | 0 |
| 2020 | 0.0 | 0.0 | 0 | 0 | 0 |
| 2019 | 2.0 | 0.0 | 1 | 0 | 0 |
| 2018 | 2.1 | 0.0 | 1 | 0 | 0 |
| 2017 | 3.3 | 0.0 | 1 | 0 | 0 |
OSHA ITA peer cross-reference
Establishment peer ledger
238220 · MI · Ann Arbor
5,793 Plumbing and heating contractors employers nationwide with a credible TCR · 16,393 rated employers in Michigan with headcount on file · 271 employers in Ann Arbor, MI · 4 cross-state NAT-TCR peers · 4 cross-state NAT-SIZE peers. Closest matches by relationship code are listed below.
| Rel | Establishment | Metric |
|---|---|---|
| NAICS-TCR | 129005 - CFS Job Cost Quad Cities | 1.2 TCR |
| NAICS-TCR | Southern Mechanical, Inc. | 1.2 TCR |
| NAICS-TCR | NTD Mechanical | 1.2 TCR |
| NAICS-TCR | Afgo Mechanical Services | 1.2 TCR |
| STATE-SIZE | R & R ASPHALT INC | 36 FTE |
| STATE-SIZE | Blue Water Energy Center | 36 FTE |
| STATE-SIZE | Facilities | 36 FTE |
| STATE-SIZE | Grand Haven Office | 36 FTE |
| CITY-NEAR | Saint Joseph Mercy Hospital-AnnArbor | 5,575 FTE |
| CITY-NEAR | St. Joseph Mercy Hospital-Ann Arbor | 5,554 FTE |
| CITY-NEAR | IHA Health Services Corporation | 2,533 FTE |
| CITY-NEAR | Thomson Reuters - Ann Arbor | 1,090 FTE |
| NAT-TCR | GSI-1 Monterey Park | 1.2 TCR |
| NAT-TCR | Village farms Marfa 1 | 1.2 TCR |
| NAT-TCR | Continental Construction, Inc. | 1.2 TCR |
| NAT-TCR | Bullseye Farms LLC | 1.2 TCR |
| NAT-SIZE | Hydrite - Lubbock TX | 36 FTE |
| NAT-SIZE | Frederick MD Yard | 36 FTE |
| NAT-SIZE | Mercedes TX Millwork | 36 FTE |
| NAT-SIZE | West Richland WA Truss | 36 FTE |
Rel codes: NAICS-TCR · STATE-SIZE · CITY-NEAR · NAT-TCR/NAT-SIZE cross-state. Read with this employer →
Read our methodology - how this data is sourced, computed, and verified.