Wyoming Statutes Title 30. Mines and Minerals § 30-2-605. Requirements as to underground magazines;  use of nonmetallic tools

(a) Underground magazines shall be of substantial construction and placed in a crosscut or idle room neck at least twenty-five (25) feet from roadways or trolley wires and in a reasonably dry and well-rock-dusted place.  The explosives and detonators shall be kept in separate boxes or magazines, but may be kept in the same box if separated by at least a four (4) inch substantially fastened hardwood partition or the equivalent.  Not more than a forty-eight (48) hour supply of explosives, including any surplus remaining from the previous day, shall be stored underground in boxes or magazines.  The inspector may approve variances in writing to the forty-eight (48) hour supply limit if the safety of miners is not adversely affected.

(b) Explosives and detonators kept near the working faces shall be stored in separate, closed containers of substantial, nonconductive material located not less than fifteen (15) feet from rail or power lines, except if kept in a niche in the rib, the distance shall be at least five (5) feet, and in a location out of line of blast where they will not likely be subjected to shock.

(c) Explosives and detonators shall be kept in their containers until removed for use at the working faces.

(d) Only nonmetallic tools shall be used for opening explosives containers underground.

(e) Underground explosives magazines and storage boxes shall be kept securely locked when unattended.

(f) Underground explosives magazines and storage boxes shall be provided with signs indicating their contents.

(g) Contents stored in magazines and storage boxes pursuant to this section shall be inventoried at least once a month and after each use.