Laserfiche WebLink
shots will be monitored unless 4 consecutive monitored ahota <br />result in a peak particle velocity of less than 3.0 inches per <br />second at the gas line. If this occurs, no additional monitoring <br />will take place at these distances. The pounds of explosive per <br />delay will not be increased from the monitored shots. <br />• <br />For blasting from 50 to 100 feet from the gas line, all shots <br />will be monitored. <br />After each monitored blast, a new data point will be added to the <br />particle velocity vs. scaled distance relationship. The 958 <br />confidence line will be adjusted accordingly, and if necessary, <br />the mine foreman will be notified if any changes are required for <br />the blast parameters. <br />All monitored blast data will be stored permanently on site and <br />will be made available to any inspector from CMLRD, MSHA or the <br />Colorado Division of Mines. <br />A letter is attached from Raton Gas Company outlining their <br />review and approval of the blasting variance under the conditions <br />outlined above. <br />Emeraencv Action Plan <br />In case.of an accidental rupture of the line due to ground <br />vibration from blasting or any other reason, prescribed <br />procedures will be followed by the mine personnel. These <br />procedures are outlined in the enclosed "Plan of Action for <br />Emergencies" developed by Raton Gas Transmission Co. All mine <br />personnel will be given a copy of the enclosed plan and will be <br />instructed to read it carefully. The plan will be posted in the <br />mine office during the entire period of mine operation. <br />6 <br />~' <br />