The decision this case can inform
Use this record when deciding whether silo cleaning can remain remote or whether any proposed entry is exposed to unstable overhead deposits or material flow.
Final MSHA fatal-accident record for a contractor cleaning a cement silo. It identifies missing barriers but is not a complete confined-space or silo-entry procedure.
What the public record actually establishes
- F1
More than two feet of caked cement remained on parts of the silo wall above the access point.
- F2
The worker entered despite having expressed that the condition was unsafe.
- F3
No staging or safety line protected the worker, and the discharge screw had not been locked out.
- F4
Falling cement engulfed the worker; MSHA also noted that available mechanical cleaning had not been fully used.
Facts and reported results are kept separate from the lesson a plant may choose to test.
Operating context
More than 2 ft of caked cement remained on parts of a silo wall above an access point during cleaning.
Intervention or finding
MSHA concluded entry under falling-material danger was primary; lack of staging and safety line and failure to isolate discharge contributed.
Documented result
Falling cement engulfed a contractor inside the silo.
Plant interpretation
Prefer remote/mechanical cleaning and authorize entry only after overhead stability, material-flow isolation, safe positioning, and rescue are verified.
Transfer boundary
Not a complete confined-space procedure.
Questions to verify at your plant
These are decision checks, not operating instructions. Resolve them through local risk assessment, technical review, and authorization.
- 01
Has remote or mechanical removal been exhausted before anyone considers entry?
- 02
How is overhead material stability independently assessed and kept under control throughout the work?
- 03
Are every fill, discharge, pneumatic, mechanical, and gravity flow path positively isolated?
- 04
Can a worker stop the job without pressure, and is a credible non-entry rescue capability ready?