---
kind: "section"
citation: "30 C.F.R. § 75.1312"
title: "30"
number: "75.1312"
heading: "Explosives and detonators in underground magazines."
url: "https://uscodex.org/cfr/30/75.1312"
---

# §75.1312. Explosives and detonators in underground magazines.

- (a) The quantity of explosives kept underground shall not be more than is needed for 48 hours of use.
- (b) Except as provided in [§ 75.1313](/cfr/30/75.1313.md), explosives and detonators taken underground shall be kept in—
  - (1) Separate, closed magazines at least 5 feet apart; or
  - (2) **The same closed magazine when—**
    - (i) Separated by a hardwood partition at least 4 inches thick; or
    - (ii) Separated by a laminated partition; or
    - (iii) **Separated by a device that is equivalent.**
- (c) Only explosives and detonators shall be kept in underground magazines.
- (d) Magazines shall be substantially constructed and all interior surfaces shall be made of nonconductive material, with no metal or other conductive material exposed inside.
- (e) All magazines shall be—
  - (1) Located at least 25 feet from roadways and any source of electric current;
  - (2) Located out of the direct line of the forces from blasting; and
  - (3) **Kept as dry as practicable.**
- (f) Magazine locations shall be posted with indelibly marked and readily visible warnings indicating the presence of explosives.
- (g) Only materials and equipment to be used in blasting shall be stored at magazine locations.

## Notes

### Source

Source: 53 FR 46786, Nov. 18, 1988, unless otherwise noted.

### Authority

Authority: 30 U.S.C. 811, 813(h), 957.

### Source

Source: 35 FR 17890, Nov. 20, 1970, unless otherwise noted.