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226 -Herm -Fughes - Kolob Family complex <br />MAJOR MANAGEMENT FACTORS <br />• Recreation <br />Herm and Fughes <br />Soil-related factors: steep slopes in some areas, high shrink-swell potential, slow permeability, <br />high soil erosion hazard in the steeper areas, moderate mass movement potential in the steeper <br />areas, clayey subsurface soil textures, (Herm -clayey surface soil textures) <br />Kolob Family <br />Soil-related factors: steep slopes in some areas, moderate shrink-swell potential, slaw <br />permeability, high soil erosion hazard in the steeper areas, subsurface rock fragments, clayey <br />surface soii textures, clayey subsurface soil textures, moderate mass movement potential in the <br />steeper areas <br />Management considerations: <br />Any construction activity on the steeper areas of this unit may trigger mass movement. <br />In the steeper areas, reduce soil erosion by disturbing only the part of the site that is used for <br />construction. <br />Foundations, concrete structures, and paved areas should be designed to offset the effects of <br />shrinking and swelling. <br />• Higher construction and maintenance costs should be expected on this unit. <br />Unsurfaced roads are slippery and may be impassable when wet. <br />Rangeland <br />Harm <br />Soil-related factors: steep slope in some areas, high soil erosion hazard in the steeper areas, <br />clayey surface soil textures, moderate mass movement potential in the steeper areas <br />Dominant vegetation in the potential plant community: Gambel oak, western wheatgrass, elk <br />sedge, Columbia needlegrass <br />Annual production of air-dry vegetation: 900 to 1,750 pounds per acre <br />Fughes <br />Soil-related factors: steep slopes in some areas, high soil erosion hazard in the steeper areas, <br />moderate mass movement potential in the steeper areas <br />Dominant vegetation in the potential plant community: western wheatgrass, Letterman's <br />needlegrass, muttangrass, slender wheatgrass <br />Annual production of air-dry vegetation: 2,000 to 3,000 pounds per acre <br />• <br />Soils Description Report -West Elk Mine <br />December 1994 WESTEC 43 <br />