---
kind: "section"
citation: "30 C.F.R. § 18.22"
title: "30"
number: "18.22"
heading: "Boring-type machines equipped for auxiliary face ventilation."
url: "https://uscodex.org/cfr/30/18.22"
---

# §18.22. Boring-type machines equipped for auxiliary face ventilation.


Each boring-type continuous-mining machine that is submitted for approval shall be constructed with an unobstructed continuous space(s) of not less than 200 square inches total cross-sectional area on or within the machine to which flexible tubing may be attached to facilitate auxiliary face ventilation.


## Notes

### Authority

Authority: 30 U.S.C. 957, 961.

### Source

Source: 33 FR 4660, Mar. 19, 1968, unless otherwise noted.