---
kind: "section"
citation: "30 C.F.R. § 57.8535"
title: "30"
number: "57.8535"
heading: "Seals."
url: "https://uscodex.org/cfr/30/57.8535"
---

# §57.8535. Seals.


Seals shall be provided with a means for checking the quality of air behind the seal and a means to prevent a water head from developing unless the seal is designed to impound water.


## Notes

### Authority

Authority: 30 U.S.C. 811.

### Source

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