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Blast Record <br />of (date) Hole Depth <br />Information <br />Complete? Loading <br />Information <br />Complete? Total Weight of <br />Explosives per <br />8-millisecond <br />time period <br />corroborated by <br />the review? Peak Particle <br />Velocity <br />(seismograph) <br />in/sec; <br />measured; <br />regulatory <br />maximum Air Blast, <br />regulatory i <br />maximum <br />133db <br /> <br /> additional sheet filed was maximum of regulatory <br /> information so for dry holes. 4,048 pounds of max 0.75 <br /> as to complete The blast explosives were <br /> the review. included wet detonated in an <br /> holes. Wet 8-millisecond <br /> hole loadings time period. <br /> could be 3,419 pounds <br /> calculated was recorded on <br /> from the blastrecord. <br /> information 6,775 pounds <br /> provided in the were <br /> blast record permissible. The <br /> (hole depth, record indicated <br /> stemming, that 5 holes in <br /> weight of one row <br /> explosives per comprised the <br /> foot, number maximum <br /> of primers). detonation. <br /> Colowyo did not <br /> recognize that a <br /> combination of <br /> eight holes <br /> scattered across <br /> seven rows of <br /> the eight-row <br /> blast comprised <br /> a greater amount <br /> of explosives <br /> within an 8- <br /> millisecond time <br /> period. <br />In every case reviewed, hole depth information was incomplete. The reported condition of holes, <br />wet or dry, was usually pretty good. Both of these items are required to determine powder <br />loading. Loading information was usually sufficient to determine the amount of explosives in a <br />hole. Loads are determined from a loading chart for dry holes. Loads in wet holes could be <br />