Discovering the Unknown
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Discovering the Unknown A group of workers were clustered around an area where an opening in the ground exposed a strangely shaped object. Police closed off the area after experts determined the object was an unexploded WWII flying bomb. There are hundreds of unexploded bombs buried in England. Kiewit Building Group Newsletter 6/17/14 Volume 2 Week 25 1
Transcript of Discovering the Unknown
Discovering the Unknown
A group of workers were clustered around an area where an opening in the ground exposed a strangely shaped object. Police closed off the area after experts determined the object was an unexploded WWII flying bomb. There are hundreds of unexploded bombs buried in England.
Kiewit Building Group Newsletter 6/17/14 Volume 2 Week 25
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Discovering the Unknown
A group of workers in the USA are around a hole in the ground. They are preparing to install a water line to a new building. They also find a “hidden bomb”, but this “bomb” is an unmarked gas line that explodes into flame when struck. Fortunately, no one was hurt; just a burned up back hoe and truck were the only casualties.
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Discovering the Unknown
Construction workers are exposed to “unexploded bombs” every time an excavation is done. Even when One-Call, 8-1-1 or other utility locating service are used, there is always the possibility of a deadly discovery of the unknown!
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Discovering the Unknown
OSHA Subpart P – Excavations – 29 CFR 1926.650 – Scope, Application, Definitions
– 29 CFR 1926.652 – Specific Excavation Requirements
– 29 CFR 1926.652 – Requirements for Protective Systems
– Provides the Standards for excavations
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Discovering the Unknown
• Site Utility Plans provide assistance with locating underground utilities
• Potential “bombs”
– Incomplete site plans
– Outdated site plans
– Abandoned utilities
– Ghost lines
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Discovering the Unknown
Finding the Unknown
Follow the plan
Trained and qualified operators
Determine actual location
Take the time
Regularly check progress
Eliminate chance
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Discovering the Unknown
Excavations and Trenching are hazardous operations that can be safely accomplished – whether at work or at home. Attention to surroundings, conditions and operations are essential to avoid the inadvertent discovery of the unknown while looking for the known.
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