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1926.800 Underground Construction

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Revision Date:
Updated On: May 17, 2005
Editorial Change:
 
This section applies to the construction of underground tunnels, shafts, chambers, and passageways. This section also applies to cut-and-cover excavations which are both physically connected to ongoing underground construction operations within the scope of this section, and covered in such a manner as to create conditions characteristic of underground construction.

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