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

Regulations last checked for updates: May 02, 2025

Title 30 - Mineral Resources last revised: Apr 14, 2025

View all text of Subpart T [§ 57.22001 - § 57.22608]

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

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.

authority: 30 U.S.C. 811.

source: 50 FR 4082, Jan. 29, 1985, unless otherwise noted.

cite as: 30 CFR 57.22217