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15 <br />• used to guide additional inventory and testing, assessment of impacts, and implementation of data <br />recovery as a means to mitigate. adverse impacts that will result from the proposed developments. <br />Additional inventory <br />Approximately 550 acres remain to be surveyed for developments proposed within the first <br />five yeazs of the mining operation. This acreage covers 24 proposed sedimentation ponds to be <br />constructed in drainages that drain the surface mine azea. It will also cover areas to be impacted <br />by proposed overburden stockpiling in valleys below the 7000 foot contour line around the <br />periphery of the surface mine. Cultural materials of similar type and distribution as those found <br />in the surface mine area are expected here. If the present average site density holds, 30 <br />additional sites can be expected in these areas. <br />The haul road to the P1/P2 box cut, and on to the R3 and R4 portals in Chimney Canyon <br />still needs to be addressed. This road corridor will also include realigrunents of the existing road <br />in Lorencito Canyon. A combination of surface inventory and alternative site discovery <br />techniques aze recommended for these proposed developments, but at present their location has <br />not been determined. This road corridor extends for about five miles from the load out facility <br />to the R3 and R4 portals. <br />The rail spur, where it extends beyond the 40-acre parcel inventoried for the load out <br />facility, has not been inventoried. Surface visibility over much of this azea is lacking, and <br />• altemative means of site discovery aze recommended for this azea. At present, the location of <br />the rail spur has not been mazked in the field, nor has a redesigned alignment of the Lorencito <br />Canyon road been identified where it will cross and parallel the rail spur. The proposed rail spur <br />extends for about 1800 feet outside the 40-acre block surveyed for the load out. <br />Additional Test Excavations <br />The test excavations already conducted on this project were preliminary in nature and <br />designed to give a cursory view of the sediments, the ease with which they can be tested, their <br />depth, and the likelihood of fmding cultural materials through "blind" testing, or testing in areas <br />where no surface cultural materials were found or where surface visibility is lacking. Five sites <br />have been tested and, with the exception of SLA7187, all warrant additional testing. Nineteen <br />other sites in various parts of the project azea require testing to provide information so that they <br />may be evaluated for eligibility to the National Register. Testing will include a combination of <br />probes and isolated 1 sq m test pits to explore areas where probing recovers cultural materials. <br />Of 16 probes excavated in one non-site azea in Lorencito Canyon, one was positive and is worthy <br />of additional exploration through additional probes and/or a test pit in the immediate azea. <br />Reseazch Desien and Treatment Plan <br />The reseazch design and treatment plan will be structured to address the archaeological <br />resources of the mine as a whole, in order to better understand the settlement and subsistence <br />. systems that produced the resources and to place them within the known chronological and <br />cultural frameworks of the region. The size of this azchaeological database, at present close to <br />