---
kind: "section"
citation: "30 C.F.R. § 57.22241"
title: "30"
number: "57.22241"
heading: "Advance face boreholes (I-C mines)."
url: "https://uscodex.org/cfr/30/57.22241"
---

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

- (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

### Authority

Authority: 30 U.S.C. 811.

### Source

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

### Authority

Authority: 30 U.S.C. 811.

### Source

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