312 Ind. Admin. Code 25-6-97

Current through December 4, 2024

Section 312 IAC 25-6-97 - Underground mining; explosives; records of blasting operations

Authority: IC 14-34-2-1

Affected: IC 14-34

Sec. 97.

A record of each blast, including seismograph records when obtained, shall be retained by the permittee for at least three (3) years and shall be made available for inspection by the director and the public on request. The record shall contain the following data:

(1) Name of the operator conducting the blast.

(2) Location, date, and time of blast.

(3) Name, signature, and certification number of the certified blaster conducting the blast.

(4) Direction and distance, in feet, to the nearest dwelling, school, church, or community or institutional building that is not owned or leased by the permittee.

(5) Weather conditions that may cause possible adverse blasting effects, including temperature, wind direction, and approximate velocity.

(6) Type of material blasted.

(7) Sketches of the blast pattern, including the following:

(A) Number of holes.

(B) Burden.

(C) Spacing.

(D) Decks.

(E) Delay pattern.

(8) Diameter and depth of holes.

(9) Types of explosives used.

(10) Total weight of explosives used per hole.

(11) Maximum weight of explosives detonated within any 8-millisecond period.

(12) Initiation system.

(13) Type and length of stemming.

(14) Mats or other protections used.

(15) Type of delay detonator and delay periods used.

(16) Seismographic and airblast records, when obtained, shall include the following:

(A) Exact location of instrument and the date, time and distance from the blast.

(B) Type of instrument, sensitivity, and calibration signal or certification of annual calibration.

(C) Name of the person and firm taking the seismograph reading.

(D) Name of the person and firm analyzing the seismograph record.

(E) The ground vibration and/or airblast level recorded.

(17) Reasons and conditions for each unscheduled blast.

312 IAC 25-6-97

Natural Resources Commission; 312 IAC 25-6-97; filed Jun 21, 2001, 2:53 p.m.: 24 IR 3562, eff Dec 1, 2001; readopted filed May 29, 2007, 9:51 a.m.: 20070613-IR-312070146RFA; readopted filed Sep 19, 2013, 10:12 a.m.: 20131016-IR-312130125RFA

Readopted filed 3/26/2019, 3:40 p.m.: 20190424-IR-312190011RFA