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u <br />Cultural Resources <br />r~ <br />U <br />Approximately one-half of the Emergency Bypass Lease application area has <br />been inventoried. The remain_der_of the area_ will have to be inventoried <br />and if significant _sites are discovered, impacts will have to be <br />-~ mi ig eateat d. No sites within the half that has been inventoried e~been <br />i'aen-Eified as potentially eligible for the National Register of Historic <br />Sites. AL1 requirements of inventory and mitigation will be done <br />according to Section 106 of the National Historic Preservation Act of 1966 <br />(as amended). <br />The effects of subsidence on archaeological and historical sites will <br />depend on the extent of surface deformation. Changes in the overall slope <br />of the site, which could occur in areas mined using longwall techniques, <br />could change the erosional patterns in a site, causing increased movement <br />of surface cultural materials and, if the change in slope is great enough, <br />destruction of surface and subsurface features and in place cultural <br />debris, as well as increased movement of surface cultural remains. <br />~ The greatest damage to an affected site could be the result of tension and <br />compression. If present, tension cracks and compression arches will cause <br />considerable damage to the integrity of a site. Tension cracks will <br />split, and possibly laterally displace, any features and other <br />\ arrangements of debris located along the crack. In addition, deposits <br />\ ~ along the crack will slump into the crack, destroying the integrity of <br />those deposits. Compression arches not only change the shape of the <br />surface, but, with enough pressure, can break. These cracks would cause <br />features to be destroyed and the mixing or overturning of cultural <br />deposits. In short, pitting within a site would destroy that area of the <br />site which collapsed. The above described impacts would be the extremes <br />of what could occur on the area. <br />PaleontoloRY <br />Paleontological resources could occur in the mine area and could be <br />destroyed. The paleontological resources are considered to be of low <br />scientific value and the impacts should not be significant. <br />Lands <br />A withdrawal for Power Site Reserve Number 31 (EO 7/2/1910) in T.2N., <br />R.lO1W., Sec. 1, Lot 6, occurs within the Bypass lease application area. <br />The occurrence of this reserve will require consultation with the Federal <br />Energy Regulatory Commission to determine if there is any impact to <br />existing or future power projects. <br />One of the alternative routes for WAPA's~ proposed 345 kV powerline <br />corridor involves these lands. This lease application is considered <br />superior in right to the corridor. Power lines would be required to be <br />constructed so as not to hinder mining. <br /> <br />17 <br />