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EXHIBIT B SITE DESCRIPTION <br /> 1. Location and General Land Use Information <br /> The site is located along State Highway 141 and is composed of and surrounded by dry <br /> rangeland. The Dolores River is approximately 130 feet west of the active mining area. The site <br /> is approximately 35 miles northwest of the Nucla City Center. The parcel is currently leased for <br /> placer gold mining by the landowner. <br /> 2. Site Geology <br /> Site geology consists of 0-4 inches of topsoil over Quaternary aged alluvium and terrace gravels. <br /> Adjacent cliff faces are composed of Jurassic sediments and include the Entrada sandstone at the <br /> base progressively topped by the Summerville and Morrison formations. Mining will occur to a <br /> depth ofโ€”15 feet below the present surface. Highly variably thick overburden is found <br /> throughout the site. There are no hazardous or acid forming materials expected to be encountered <br /> during excavation. See the Natural Resources Conservation Service (MRCS) soil report in <br /> Appendix 1 for more details on surface composition. <br /> 3. Surface Hydrology <br /> Prior to mining, the permit area has a shallow slope to the west. Pre-mining topography is shown <br /> on Map E-1. All of the runoff on the undisturbed site runs to the west towards State Highway <br /> 141 and the Dolores River. The Dolores River floodplain is unmapped in the area and the current <br /> river elevation is 20 feet lower than the lowest area within the active mine site. <br /> Stormwater will be kept from entering the site from the east by the shallow ditches and <340ot- <br /> tall berms that surround the site following the perimeter. Stormwater that occurs on site will <br /> remain on site by perimeter berms and ditches; however, the porous surface of the site will allow <br /> for all stormwater to infiltrate the site and pit floor within 72 hours. <br /> Two monitoring/sampling wells are in place on the BLM land โ€”1,300 feet north of the site along <br /> the Dolores River and have 9- and 12-foot depths with a static water level of 8 feet below the <br /> ground surface. Therefore, groundwater is expected to be >-30 feet below the lowest point of the <br /> active mining area. As the depth of mining is โ€”15 feet, groundwater is not expected to be <br /> Bancroft Placer Mine X <br /> July 2020 B-1 <br />