Laserfiche WebLink
1 <br />areas occurs within this soil complex, Comodore soils are a <br />very stony loam over shallow hard bedrock at 15 to 20 inches; <br />t the Blackhall soil type is as described previously. About 10 <br />percent of the Comodore-Blackhall complex on the site is rock <br />t outcrop, and the lower drainages have deep (up to 15 ft) sandy <br />loam soils. These soil types occur mixed on the site and cannot <br />be mapped separately. Portions of the soils in this complex <br />on the mine site can be stripped and are suitable as topsoil. <br />The limitations are stoniness, rapid runoff, and moderate <br />erosion hazard, if not protected. The vegetation type on this <br />soil complex is a pinyon juniper woodland with small stands <br />' of montane coniferous trees in favorable microsites. The SCS <br />has listed this complex as a Pinyon Juniper Woodland site. <br />' I.2.5 Rock River Sandy Loam, Three to Nine Percent Sloaes <br />' The Rock River sandy 1 oam i s on the fan s and valley <br /> slopes to the west of the foothills in the area of the current <br />' test heap and office. This soil is formed in deep alluvium from <br /> mixed rock sources, principally sandstone and conglomerate. <br />' The surface layer is light brown sandy loam five- to eight- <br />d <br />20 <br />i <br />h <br />hi <br />k <br />l <br />i <br />b <br />b <br />l <br />l <br />5 <br /> y c <br />oam 1 <br />- <br />nc <br />c <br />, under <br />a <br />n <br />y a <br />rown san <br />ay <br />- to <br />es t <br /> inches thick. The substratum to about 60 inches is alight to <br />' pinkish brown sandy loam. The top 24 inches is suitable as <br /> growth medium, and lower horizons may be used with proper <br /> management and amendments. The vegetation on this soil type <br /> is a sagebrush shrub with little grass cover. The SCS has rated <br />' this soil as a Valley Bench range site, <br /> I.3 Toasoil Characteristics and Suitability <br /> The soil textures range from sandy loams to clay loams with <br />' in-place soil showing organic matter and roots in the top 8 to 12 <br /> inches. Limitations on use of the soils as topsoiling materials <br />' include stoniness on the ridges and steep slopes, and moderate <br /> erosion and runoff hazard on disturbed or replaced soil, if not <br />1 <br /> I-6 <br /> <br />