Stone mining and quarrying (NAICS 21231): average TRIR and DART
These are the 2024 private-industry incidence rates from the U.S. Bureau of Labor Statistics, per 100 full-time-equivalent workers. Prequalification forms often ask whether your TRIR and DART are at or below these numbers.
Other recordable cases: 0.6. "Not published" means the data does not meet BLS publication guidelines.
What this means for your prequal form
Worked example: a company in this industry with 100,000 hours worked in a year (about 50 full-time employees) would match the industry average at 0.9 recordable cases. With 400,000 hours (about 200 employees) the figure is 3.6.
TRIR = recordable cases × 200,000 ÷ hours worked. DART = (days-away cases + restricted/transfer cases) × 200,000 ÷ hours worked. Use your OSHA 300A totals for each calendar year.
Parent industry: Nonmetallic mineral mining and quarrying (NAICS 2123), TRC 1.7, DART 1.2.
Detailed industries under NAICS 21231
| NAICS | Industry | TRC | DART |
|---|---|---|---|
| 212311 | Dimension stone mining and quarrying | 1.8 | 1.4 |
| 212312 | Crushed and broken limestone mining and quarrying | 1.9 | 1.2 |
| 212313 | Crushed and broken granite mining and quarrying | 1.4 | 1.1 |
| 212319 | Other crushed and broken stone mining and quarrying | 1.8 | 1.3 |
Source: BLS Survey of Occupational Injuries and Illnesses, Table 1 (2024). NAICS 2017 codes as published by BLS.