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A Review of Blasting Operations at Summit Bricks Mines I. SITE LOCATIONS & GEOLOGY ~lll maxis haz,c Lal.%Long. Coordin~aies measured aK the nntranre of the ~e~niifted or iensed area 1. The Fox Mine: (Permit # M-1977-219) Map 1 • shows the general location of the Fox Mine where the geology consists of the strata and clays of the Glencairn Formation, Dakota Group are being mined. Further, the map shows, streams, roads, utilities, wells, all dwellings with in 3000 ft., and other structures. There are two dwellings and wells exist within 3000ft. of the proposed blasting. A pre- blast survey will be conducted and release aggreements signed. Extensive published geological work has mapped the Dakota Sandstone Group with the associated clays throughout Pueblo and surrounding counties. Near the middle of the Dakota Group lies the Glencairn Formation, which contains shales and clays which have brick making properties. Site specific geology indicates that the Dakota strikes approximately N 5° W, and has a slight dip to the north-east, existing as a flatiron and truncated by the Red Creek Fault trending approximately N 2° W. It is true that the Dakota is a great aquifer and supplies mangy wells, the area of mining conducted by Summit Brick at the surface and a great distance up gradient from the area where wells are supplied from the base of the Dakota Aquifer. If anything, blasting of the surface Dakota might enhance aquifer recharge. 2. The Stocks Mine: (Permit # M-1977-324) Maa 22• shows the general location of the Stoks mine where the geology, very similar to that of the Fox mine, consists of the strata and clays of the Glencairn Formation, Dakota Group. Further, the map shows streams, roads, utilities, wells, all dwellings with in 3000 ft., and other structures. There are dwellings and wells exist within 3000ft. of the proposed blasting. A pre-blast survey will be conducted and release aggreements signed. Extensive published geological work has mapped the Dakota Sandstone Group with the associated clays throughout Fremont County. Near the middle of the Dakota Group lies the Glencairn Formation, which contains shales and clays which have brick making properties. Site specific geology indicates that the Dakota strikes approximately N 75° W, and has a slight dip to the south-west, existing as an un-eroded island several hundred ft. above the aluvium of Wilson Creek, and other surrounding formations. Local wells are not producing from the Dakota Aquifer. 6