---
kind: "section"
citation: "30 C.F.R. § 816.68"
title: "30"
number: "816.68"
heading: "Use of explosives: Records of blasting operations."
url: "https://uscodex.org/cfr/30/816.68"
---

# §816.68. Use of explosives: Records of blasting operations.


The operator shall retain a record of all blasts for at least 3 years. Upon request, copies of these records shall be made available to the regulatory authority and to the public for inspection. Such records shall contain the following data:

- (a) **Name of the operator conducting the blast.**
- (b) **Location, date, and time of the blast.**
- (c) **Name, signature, and certification number of the blaster conducting the blast.**
- (d) Identification, direction, and distance, in feet, from the nearest blast hole to the nearest dwelling, public building, school, church, community or institutional building outside the permit area, except those described in [§ 816.67(e)](/cfr/30/816.67.md?p=e).
- (e) Weather conditions, including those which may cause possible adverse blasting effects.
- (f) **Type of material blasted.**
- (g) **Sketches of the blast pattern including number of holes, burden, spacing, decks, and delay pattern.**
- (h) **Diameter and depth of holes.**
- (i) **Types of explosives used.**
- (j) **Total weight of explosives used per hole.**
- (k) **The maximum weight of explosives detonated in an 8-millisecond period.**
- (l) **Initiation system.**
- (m) **Type and length of stemming.**
- (n) **Mats or other protections used.**
- (o) Seismographic and airblast records, if required, which shall include—
  - (1) Type of instrument, sensitivity, and calibration signal or certification of annual calibration;
  - (2) Exact location of instrument and the date, time, and distance from the blast;
  - (3) Name of the person and firm taking the reading;
  - (4) Name of the person and firm analyzing the seismographic record; and
  - (5) **The vibration and/or airblast level recorded.**
- (p) **Reasons and conditions for each unscheduled blast.**

## Notes

### Amendments

[48 FR 9809, Mar. 8, 1983, as amended at 52 FR 29181, Aug. 6, 1987; 81 FR 93392, Dec. 20, 2016; 82 FR 54979, Nov. 17, 2017]

### Authority

Authority: 30 U.S.C. 1201 et seq.; and sec 115 of Pub. L. 98-146.

### Source

Source: 44 FR 15395, Mar. 13, 1979, unless otherwise noted.

### Amendments

[48 FR 9809, Mar. 8, 1983, as amended at 52 FR 29181, Aug. 6, 1987; 81 FR 93392, Dec. 20, 2016; 82 FR 54979, Nov. 17, 2017]