§57.22241. Advance face boreholes (I-C mines).

30 C.F.R. § 57.22241

(a)

Boreholes shall be drilled at least 25 feet in advance of a face whenever the work place is within—

(1)

50 feet of a surveyed abandoned mine or abandoned workings which cannot be inspected; or

(2)

200 feet of an unsurveyed abandoned mine or abandoned workings which cannot be inspected.

(b)

Boreholes shall be drilled in such a manner to insure that the advancing face will not accidently break into an abandoned mine or abandoned working.

Notes, amendments, and revision history

Authority: 30 U.S.C. 811.

Source: 52 FR 24941, July 1, 1987, unless otherwise noted.

Authority: 30 U.S.C. 811.

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