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1. SITE LOCATION & GEOLOGY <br />All malls' have Lat,/Long. CooTrlinates measured at tlae entrance of the fiemzit/ed or leased area. <br />1. The Fox Mine: (Permit # M-1977-219) <br />Map 1. shows the general location of the Fox Mine, accessible from State <br />Highway 78, north approximately one mile along Siloam Rd., Pueblo, County. <br />Further, the map shows streams, roads, utilities, wells, all dwellings with in <br />3000 ft., and other structures. There are two dwellings and wells exist within <br />3000ft. of the proposed blasting. At aprior-blasting event, a seismic analysis <br />was made and is included here in. <br />The geology consists of the clays and shales (actively mined) of the Glencairn <br />Formation, Dakota Group. Extensive published geological work has mapped <br />the Dakota Sandstone Group with the associated clays throughout Pueblo and <br />surrounding counties. Near the middle of the Dakota Group lies the Glencairn <br />Formation, which contains shales and clays, which have brick making <br />properties. Site specific geology indicates that the Dakota strikes <br />approximately N 5~ W, and has a slight dip to the north-east, existing as a <br />flatiron and truncated by the Red Creek Fault trending approximately N 2~ W. <br />General overburden thickness averages less than 20 feet of very clean <br />sandstone, massive bedded with little fracturing. <br />It is true that the Dakota is a great aquifer and supplies many wells, the area of <br />mining conducted by Summit Brick at the surface and a great distance up <br />gradient from the area where wells are supplied from the base of the Dakota <br />Aquifer. If anything, blasting of the surface Dakota might enhance aquifer <br />recharge. <br />L.W. Weir Transfer, Inc. of Pueblo, Colorado normally conducts blasting. <br />Overburden consists of thick-bedded sandstone about 5 to 20 feet thick. Due <br />to the nature of the softness of the clays below the blasting level, a portion of <br />the blast impulse is absorbed on site. Blast holes are usually 3.5" in diameter <br />with an average depth of 15 ft on 8-foot centers. Al] holes are stemmed with 3 <br />feet of dirt, thus powder thickness is usually less than 12 feet. A delay of 25 <br />milliseconds is used combining 2 holes. <br />(Verbal communication with Lloyd Weir, 4-29-02) <br />Below are recent photographs of the Fox Mine: <br />