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OSHA Workplace Injury Research

Underground Work Injuries Are Rarely Just Accidents

OSHA recorded 26 severe cases involving mines, caves, and tunnels, with 75% of incidents resulting from falls to lower levels.

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How often these injuries happen

OSHA recorded 26 severe cases involving mines, caves, and tunnels over the last decade. Fractures are the most common injury type, accounting for 46% of all reported incidents.

These injuries are uniquely severe because they often involve falls into deep shafts or entrapment in confined spaces. You may suffer from brain injuries that require extensive medical intervention and long-term recovery.

Reported Projected
0123456720152025
Data: Federal OSHA Severe Injury Reports (29 states). 2025 and 2026 data forecasted by ClaimsBoost research team.

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How these injuries happen

Most injuries in this category stem from falls to lower levels, often when you are accessing manholes or deep excavation sites. Other common scenarios involve being struck by heavy pipes during lifting operations or flash fires caused by gas buildup in confined underground environments.

1 Other fall to lower level
Incidents
18
Share
75% of reported incidents
2 Fall on same level
Incidents
2
Share
8% of reported incidents
3 Caught or wedged between objects— nonrunning
Incidents
1
Share
4% of reported incidents
4 Explosion of nonpressurized vapors, gases, or liquids
Incidents
1
Share
4% of reported incidents
5 Compressed between running equipment and other object(s)
Incidents
1
Share
4% of reported incidents
6 Struck by suspended or swinging object
Incidents
1
Share
4% of reported incidents
Cause Incidents Share
1Other fall to lower level 1875% of reported incidents
2Fall on same level 28% of reported incidents
3Caught or wedged between objects— nonrunning 14% of reported incidents
4Explosion of nonpressurized vapors, gases, or liquids 14% of reported incidents
5Compressed between running equipment and other object(s) 14% of reported incidents
6Struck by suspended or swinging object 14% of reported incidents

Where injuries happen most

Construction accounts for 62% of these severe injuries, as crews frequently work in trenching and underground utility environments. Utilities and mining sectors also face significant risks due to the constant need for maintenance in confined, deep-access spaces.

Construction 62%
Utilities 12%
Manufacturing 8%
Mining 8%
Transportation & Warehousing 4%
Other 6%

Real cases like yours

Common patterns in these reports include failures to properly secure manhole covers, inadequate gas monitoring before entry, and lack of fall protection near open shafts. If your injury occurred during a similar inspection or maintenance task, an attorney can help you review the specific safety failures that led to your harm.

Year State Industry Incident summary

Source: OSHA Severe Injury Reports. Narratives are verbatim from filings; identifying details may have been redacted by OSHA.

Frequently asked questions