2024-08-28_PERMIT FILE - C1981019A (2)

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RULE 4 PERFORMANCE STANDARDS Rule 4 Performance Standards 4-26 Revision Date: 8/21/24 Revision No.: MR-259 A written report of any pre-blasting survey will be prepared and signed by the person conducting the survey. This report will include any proposed adjustments to the blasting program which might be necessary to be incorporated or should be incorporated to prevent damage. A copy of the report will be provided to the person requesting the survey and to the Division. For properties owned by Colowyo, a pre-blast survey will not be necessary. In a report dated February 19, 1991 Colowyo initiated and reported on a Building Condition Inspection of the Durham Ranch. Although the Durham ranch was located further than one-half mile from the Permit Boundary at that time (approximately 4200 feet) the inspection was nevertheless completed. The Durham Ranch residents were also presented with a copy of the report. On May 20, 1997 an additional copy of the report was presented to the Durhams and also a copy forwarded to the Division. A copy of the May 20, 1997 letter can be found in Exhibit 14 - Seismograph Measurements. 4.08.3 Public Notice of Blasting Schedule The blasting program at the Colowyo operation will involve the detonation of more than five pounds of explosives or blasting agent in all blasts. Colowyo will annually publish a blasting schedule in the local Craig newspaper. A typical blasting schedule published in the local newspaper is set forth in Section 2.05, Figure 2.05-1, Publication of Blasting Schedule. Copies of the blasting schedule will be republished and redistributed every 12 months by mail to local governments and public utilities and by mail or delivered to each residence within one-half mile of the blasting site described in the schedule. 1. Destruction of damaged or deteriorating explosives or detonators; or 2. Disposal of misfires and/or undetonated explosives; or 3. Firing of charged holes as soon as practicable after cessation where electricity or stray current conditions where electric detonators are used; or 4. Firing of charged holes when weather conditions indicate the existence of a safety hazard is eminent Colowyo gives warning and all-clear signals of different characters that are audible- within a range of one-half mile of the blast. Individuals within the permit area and individuals who reside or work within one-half mile of the mining area will be notified of the meaning of the signals through appropriate written instructions. Colowyo will periodically inform such individuals of the proposed blasting schedule and inform them of the meaning of the signals. Colowyo will also maintain signs in accordance with Section 4.02. Colowyo will regulate access into the area possibly subject to flyrock from blasting to protect the public and livestock. Fences are in place to keep livestock out of the mining areas. The permit area will be identified by signs on the access road restricting entry to authorized personnel. Signs will also be posted identifying the area as a blasting area and describe the warning and all-clear signals. Immediate access to the area of blasting will be cleared and controlled by qualified mine personnel prior to any blast.