Administrative Rules of Montana
Department 17 - ENVIRONMENTAL QUALITY
Chapter 17.24 - RECLAMATION
Subchapter 17.24.6 - Strip and Underground Mine Reclamation Act: Transportation Facilities, Use of Explosives, and Hydrology
Rule 17.24.626 - RECORDS OF BLASTING OPERATIONS
Universal Citation: MT Admin Rules 17.24.626
Current through Register Vol. 6, March 22, 2024
(1) A record of each blast, including seismograph records, must be retained for at least three years and must be available for inspection by the department and the public on request. Blasting records must be complete and accurate at the time of inspection. The record must contain the following data:
(a) name of the operator conducting the
blast;
(b) location, date, and time
of the blast;
(c) name, signature,
and license number of blaster-in-charge;
(d) direction and distance, in feet, from the
blast hole nearest to a dwelling, or commercial, public, community, or
institutional building either:
(i) not
located in the permit area; or
(ii)
not owned nor leased by the person who conducts the mining
activities.
(e) weather
conditions, including temperature, wind direction, and approximate
velocity;
(f) type of material
blasted;
(g) number of holes,
burden, and spacing;
(h) diameter
and depth of holes;
(i) types of
explosives used;
(j) total weight
of explosives used and total weight of explosives used in each hole;
(k) maximum weight of explosives detonated
within any eight-millisecond period;
(l) maximum number of holes detonated within
any eight-millisecond period;
(m)
initiation system;
(n) type and
length of stemming;
(o) mats or
other protections used;
(p) type of
delay detonator and delay periods used;
(q) sketch of the delay pattern;
(r) number of persons in the blasting
crew;
(s) seismographic and
airblast records, where required, including:
(i) the calibration signal of the gain
setting or certification of annual calibration;
(ii) seismographic reading, including exact
location of seismograph and its distance from the blast, airblast reading,
dates and times of readings;
(iii)
name of the person taking the seismograph reading; and
(iv) name of the person and firm analyzing
the seismographic record; and
(t) reasons and conditions for each blast
occurring outside the time frames published in the blasting schedule.
AUTH: 82-4-205, MCA; IMP: 82-4-231, MCA
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