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Rule 2.06.1,2.06.8(reclamation),4.02(operations), Alluvial Valley Floors <br /> DRMS June 2022 <br /> Exhibit 18: Alluvial Valley Floor Investigation, discusses the potential of AVF's in the area. <br /> The investigation concludes (page 16, Map 2.047-2, Table AV-7),that unconsolidated materials <br /> along the Purgatoire River appear to be an AVF and would sustain sub irrigation. Whereas <br /> Lorencito,Alamosa and Cow Canyons do not appear to sustain AVFs. These findings point to the <br /> AVF definition in sections 1.04(8), (10) (43) (142), of the rules. <br /> Rule 4.02 establishes minimum performance standards for mining in and reclamation of AVF's. <br /> Current hydrologic science, evolved since the SMACRA rules were first promulgated may suggest <br /> additional protections or more sensitive mining practices. The potential that the current climate <br /> regime may be reducing the amount of water available to the Purtagoire River AVF may require a <br /> careful analysis of any future mining and associated reclamation practices in the AVF. <br /> Alluvial Valley Floors Map <br /> According to the OSM map of Potential Alluvial Valley Floors (AVF), no AVF's or potential <br /> irrigable areas exist within the Lorencito Mine permit boundary or the surrounding area as per the <br /> map excerpt below. <br />