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SITE LOCATIONS & GEOLOGY <br />2. The Cedarwood Clay Mine: (Permit # M-77-317) <br />Map 6. shows the general location of the Cedarwood Mine where the geology, <br />again is very similar to that of the Fox mine, and consists of the strata and <br />clays of the Glencairn Formation, Dakota Group. Further, the map shows <br />streams, roads, utilities, wells, all dwellings with in 2000 ft., and other <br />structures. There are no dwellings or wells within 2000ft. of the proposed <br />blasting. <br />Extensive published geological work has mapped the Dakota Sandstone Group <br />with the associated clays throughout this section of Pueblo County. Near the <br />middle of the Dakota Group lies the Glencairn Formation, which contains <br />shales and clays which have brick making properties. Site specific geology <br />indicates that the subject Dakota Group strikes N 10~ W and dips to the north- <br />east, existing as an un-eroded island, situated above the surrounding <br />formations. Local wells are not producing from the Dakota Aquifer. <br />L.W. Weir Transfer, Inc. of Pueblo, Colorado normally conducts blasting. <br />Overburden consists of thick-bedded sandstone about 5 to 10 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 8 ft on 8-foot centers. All holes are stemmed with 3 <br />feet of dirt, thus powder thickness is usually less than 5 feet. A delay of 25 <br />milliseconds is used combining 2 holes. <br />(Verbal communication with Lloyd Weir, 4-29-02) <br />