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Homestake Mining Company May 10,2019 <br /> Regular(112d)Operation Reclamation Permit Application Package <br /> B g <br /> WEST EAST <br /> 11.000 <br /> _. 0r1 Zorw <br /> OT <br /> Pbm <br /> tit ! €t`T 'l�i PE <br /> a , # 1$7R <br /> 513C <br /> Cr <br /> rYY2 a a 0 H F'Crra 17OR <br /> g Y € <br /> 2 <br /> 42�409C <br /> c <br /> d MI <br /> � t <br /> WWW aaessi# sGap e <br /> C.eadv�E�4 `s <br /> At2tk2 i.. PC <br /> Ltd 366R <br /> �f <br /> Dobrt+ttt <br /> 0 200 400 FEET prsca, i" <br /> , 628A i <br /> 0 60 120 METERS <br /> Figure 3-4. Geologic cross section of the Pitch Mine site. Location of profile B-B' is shown in <br /> Figure 3-3. Figure from Nash (1988). <br /> The Chester fault is mapped for at least 6 miles at the surface. It is best expressed at the mine <br /> where Paleozoic strata are juxtaposed against Precambrian rocks across the faulted contact and <br /> on the north side of Marshall Creek where the fault is naturally exposed in an outcrop <br /> (Nash, 1980). Faulting becomes less obvious north of the Mine due to an absence of Paleozoic <br /> rocks and poor exposures and to the south where the fault appears to be buried by Cenozoic <br /> volcanic deposits (Goodknight and Ludlum, 1981). <br /> 3.1.4. Seismic Hazard <br /> The SRM region of Colorado is characterized by extensional tectonics, distributed normal faulting, <br /> and low-rate seismicity. The main seismogenic tectonic structure within the region is the 700 km <br /> long Rio Grande Rift System. It extends from central Colorado to the Mexican border and is <br /> composed of fault-bounded, north-south trending, grabens and half grabens (Tweto, 1979) <br /> (Figure 3-5). In Colorado, the northern Rio Grande Rift is expressed by the extents of the upper <br /> Arkansas Valley and the San Luis Valley. Each valley is bounded by faults which have ruptured <br /> since the latest Pleistocene and are seismic sources in regional and local seismic source models <br /> (e.g., Petersen et al., 2014; Wong et al., 1995). These faults include the Northern Sangre de <br /> Cristo fault, a west dipping normal fault which bounds the eastern margin of the San Luis Valley <br /> and the Sawatch fault, an east dipping normal fault which bounds the western margin of the Upper <br /> EXHIBIT E-RULE 6.4.5(AMENDED RECLAMATION PLAN) Page 17 <br /> HOMESTAKE MINING COMPANY <br />