Mine Safety and Health Administration (MSHA) - Interactive Training

U.S. Department of Labor
Mine Safety and Health Administration
Protecting Miners' Safety and Health Since 1978

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1. Haul Roads
2. Berms
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The berm shown here looks very good, but is actually worthless. Remember that when the tire hits this soft material it penetrates. Then the tire starts compacting the material until it can hold the weight that it’s being subjected to. When the material holds the weight, the tire starts climbing. This berm is built of soft material. The material was "downsloped" (pushed off the edge of the road). It is not resting on a solid base.


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Mine Safety and Health Administration (MSHA) 1100 Wilson Boulevard, 21st Floor Arlington, VA 22209-3939	Phone: (202) 693-9400 Fax-on-demand: (202) 693-9401 Technical (web) questions: Webmaster On-line Filing Help: MSHAhelpdesk@dol.gov or call (877) 778-6055 Contact Us