---
kind: "section"
citation: "30 C.F.R. § 77.211"
title: "30"
number: "77.211"
heading: "Draw-off tunnels; stockpiling and reclaiming operations; general."
url: "https://uscodex.org/cfr/30/77.211"
---

# §77.211. Draw-off tunnels; stockpiling and reclaiming operations; general.

- (a) Tunnels located below stockpiles, surge piles, and coal storage silos shall be ventilated so as to maintain concentrations of methane below 1.0 volume per centum.
- (b) In addition to the tests for methane required by [§ 77.201](/cfr/30/77.201.md) such tests shall also be made before any electric equipment is energized or repaired, unless equipped with a continuous methane monitoring device installed and operated in accordance with the provisions of [§ 77.211-1](/cfr/30/77.211-1.md). Electric equipment shall not be energized, operated, or repaired until the air contains less than 1.0 volume per centum of methane.

## Notes

### Authority

Authority: 30 U.S.C. 811.

### Source

Source: 36 FR 9364, May 22, 1971, unless otherwise noted.