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A variety of laws, regulations, and policy directives mandate the evaluation of the effects of the <br /> alternatives on environmental elements. Not all programs, resources or uses are present in the <br /> area, or if they are present,may not be affected by the alternatives. <br /> Only those elements that are present and have the potential to be significantly impacted are <br /> described and brought forth for detailed analysis. <br /> Resource for Issue 1 W I <br /> A. Affected Environment and Description of the No Action Alternative for Soils. <br /> According to the Soil Survey of Aspen-Gypsum Area, Colorado: Parts of Eagle, Garfield, and <br /> Pitkin Counties(USDA 1992),the CDOT material storage site encompasses two primary soil map <br /> units. The two primary soil map units are the Yamo Loam and the Gypsum land-Gypsiorthids <br /> complex. The Yamo Loam has been identified as having medium runoff with a slight erosion <br /> hazard potential. Only 0.4 acres of the proposed 12.6 acres would fall within the Gypsum land- <br /> Gypsiorthids complex. The Gypsum land-Gypsiorthids complex has been identified has having <br /> very rapid runoff with a slight to severe erosion hazard.The severe erosion hazard for the Gypsum <br /> land-Gypsiorthids is limited to steeper slopes. Following is a brief description of the two primary <br /> soil map units found within the three allotments: <br /> Yamo Loam (115) — This deep, well drained soil is found on fans and toe slopes at elevations <br /> ranging from 6,200 to 7,500 feet and on slopes of 6 to 12 percent. This soil is derived from <br /> sandstone, shale, and gypsum alluvium. Surface runoff is medium and the water erosion hazard is <br /> slight. This soil is used primarily for rangeland, hayland, and pasture purposes. <br /> Gypsum land-Gypsiorthids complex (55) — This moderately deep, well drained soil is found on <br /> mountainsides,hills, and along dissected drainageways and on slopes of 12 to 65 percent.This soil <br /> is derived dominantly from mixed material with a high content of gypsum. Surface runoff is very <br /> rapid and the water erosion hazard is slight to severe on the steeper slopes. This soil is primarily <br /> used as wildlife habitat. <br /> Reasonably Foreseeable Environmental Trends <br /> No reasonably foreseeable environmental trends that can be linked to the proposed action are <br /> present. <br /> Planned Actions in the Area <br /> There are no planned actions related to the affected environment in the area. <br /> Issue I —How are soil resources impacted by the materials storage site? <br /> Issue 1 -Proposed Action. <br /> The proposed action is for the CRVFO to authorize a right-of-way for a 12.63 acre material <br /> storage area for 30 years. This right-of-way will increase the previous storage area from 2.4 acres <br /> to 12.6 acres, a net increase of 10.2 acres. The storage area will be used during emergency <br /> removals of rock and soil from the Glenwood Canyon debris flows that close Interstate 70. Soil <br /> DOI-BLM-CO-G020-2021-0014-EA I BLM-Colorado River Valley Field Office <br />