['Specialized Industries']

['Mining']

07/19/2025

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§57.22217 Seals and stoppings (I-A, I-B, and I-C mines).

...

§57.22217 Seals and stoppings (I-A, I-B, and I-C mines).

RegSense CFR Regulations Mining Specialized Industries CFR Section English Focus Area USA

All seals, and those stoppings that separate main intake from main return airways, shall be of substantial construction and constructed of noncombustible materials, except that stoppings constructed of brattice materials may be used in face areas.

['Specialized Industries']

['Mining']

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