7 Colo. Code Regs. § 1101-9-8-1

Current through Register Vol. 47, No. 24, December 25, 2024

Section 7 CCR 1101-9-8-1 - General Requirements

(A) Seismic Blasting shall conform to the requirements of Articles 4, 5 and 6 of these regulations for the storage and transportation of all explosive materials, for the preparation of charges, for the loading of charges and for the detonation of charges.

(B) Surface charges, above-surface charges, and armed charges loaded in seismic drill holes less than 20 feet in depth shall not be left unattended.

(C) Charges which have not been armed may be left unattended in holes less than 20 feet deep provided that:

(1) The hole has been loaded such that the charge has been anchored, cannot be removed and is capped with a hole plug;

(2) The charge does not exceed an amount that would cause damage to persons or property on the surface if accidentally detonated; and

(3) The backfill material in the loaded hole is a continuous column from the charge to the collar of the drill hole. Any drill holes in which the backfill material has bridged and the hole has not been fully backfilled shall not be left unattended.

(D) Armed or unarmed charges loaded in seismic drill holes greater than 20 feet deep may be left unattended provided that:

(1) The hole has been loaded such that the charge has been anchored, cannot be removed and legwires have been made inaccessible and capped with a hole plug;

(2) The charge does not exceed an amount that would cause damage to persons or property on the surface if accidentally detonated; and

(E) Armed and unarmed charges that are loaded in inhabited areas shall not be left unattended.

(F) Blasting signs shall be posted on roads and trails leading to the blast site.

7 CCR 1101-9-8-1

38 CR 03, February 10, 2015, effective 3/10/2015

41 CR 21, November 10, 2018, effective 12/1/2018

42 CR 06, March 25, 2019, effective 5/1/2019