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The maximum charge weight has been calculated this way to ensure that any blast designed under this criterion <br />would not exceed the allowable amount using the scale distance formula. Thereby, meeting the intent of the law <br />to not exceed the maximum weight of explosives in any 8-ms time period. Colowyo's blast records reflect the <br />maximum weight of explosives using the above method. <br />The typical blasting parameter tables are merely examples of the programs used in blasting coal and overburden <br />at Colowyo. As such, they are not intended to represent any one blast exactly as conditions in the field dictate <br />the exact design for each blast. For example, an overburden blast maybe drilled with an offset pattern, 25 feet <br />x 30 feet spacing and tied in row on row rather than the design shown on Table 2.05-5. <br />The blast initiation systems that Colowyo uses may vary, but all are noted on the blast report for each blast <br />event. For example one type of blast initiation system is the EZ Dets system. These systems are used to <br />initiate the blast from the certified blaster to the initiation hole and all other holes then tied into that system. An <br />entire initiation system could consist of down the ho]e caps, delays, and tubing connected to a surface system <br />of cords, de]ay connectors, and initiation terminal. The system is designed specifically for each blast event to <br />not exceed the requirements of the scaled distance formula or the one hole per 8ms time period requirements. <br />Types of blasting materials and delays to accomplish this are noted on each blast report. <br />Blasting_Records <br />Colowyo will keep a record of each individual blast by utilizing report formats shown in FiQUre 2 -Blasting <br />Report (coal and overburden), Figure 3 - Colowyo Char ewei~ht Sheet (overburden only). <br />Revision Date: 12/19/03 <br />2.05-28a Revision No.: MR-61 <br />