Trench Safety Awareness

April 2006
DHHS (NIOSH) Publication Number 2006-133D

Note: This publication supersedes 2005-133d and 2004-153c

Image of a Worker at Trenching Site

This Web-based training exercise contains material on conducting a safe trenching operation. Topics include the four types of trench collapse, the frequency and cost of trench collapses, trench soil types, and common trench protective systems.

This training exercise has been reviewed by several labor, industry, OSHA and NIOSH representatives, and reflects their recommendations. If you identify any issues that you believe merit correction, please send your comments to: .

For more information on the training exercise contact: Patrick J. Coleman, Spokane Research Laboratory , 509-354-8000,

If you would like to receive a CD version of this exercise send your name and address to:
The Spokane Research Laboratory
315 E. Montgomery
Spokane, WA 99207
c/o Patrick Coleman


CD-ROM downloading is available for advanced users.