=Walsh
<br />Environmental Scientists and Engineers, LLC
<br />developing in weathered, interbedded sandstone, siltstone, and shale, as well as in local
<br />colluvium, slopewash, and streamlain alluvium. Plant rooting depth corresponds with soil
<br />depth. Most soils are moderately well drained to well drained. Soils support mostly native
<br />vegetation used for livestock grazing and wildlife habitat. The soil survey for Moffat
<br />County was recently completed by the USDA Natural Resources Conservation Service
<br />(NRCS 2005) and it was used to describe the various mapping units (Figure 6):
<br />Map Unit 37: Cochetopa loam, 12 to 25 percent slopes
<br />The elevation for this mapping unit is 7,200 -8,300 feet amsl. Annual precipitation is 18-
<br />20 inches and the frost -free period is 50-75 days. Eighty -five percent of the mapping unit
<br />is Cochetopa soil with 15 percent minor component. The fine, montmorillonitic Argic
<br />Pachic Cryoborolls has residuum derived from sandstone and shale parent material and is
<br />a deep, well- drained soil. The Mountain Loam ecological site supports potential
<br />vegetation of slender wheatgrass, Letterman's needlegrass, mountain big sagebrush, elk
<br />sedge, mountain brome, mountain snowberry, nodding brome. The minor soils are Jerry
<br />and similar soils, and Routt and similar soils.
<br />Map Unit 52: Danavore -Waybe complex, 5 to 30 percent slopes
<br />The elevation for this mapping unit is 7,200-8,600 feet amsl. Annual precipitation is 18-
<br />20 inches and the frost -free period is 50-75 days. Fifty -seven percent of the mapping unit
<br />is Danavore -Waybe complex soils, 30 percent Waybe and similar soils, and minor
<br />components 13 percent. The Danavore soil is a loamy- skeletal, mixed (calcareous) Typic
<br />Cryorthents, while Waybe is a clayey, mixed (calcareous), shallow Typic Cryorthents.
<br />Both soils are well- drained and shallow. Patent material is residuum derived from
<br />sandstone and shale. The Dry Exposure ecological site supports potential vegetation of
<br />bluebunch wheatgrass, black sagebrush, bottlebrush squirreltail,, western wheatgrass,
<br />needle and thread, prairie Junegrass. The minor component is rock outcrop.
<br />Map Unit 117: Lamphier -Jerry complex, 25 to 65 percent slopes
<br />The elevation for this mapping unit is 7,200 -8,600 feet amsl. Annual precipitation is 18-
<br />20 inches and the frost -free period is 50-75 days. Forty -five percent of the mapping unit
<br />is Lamphier and similar soils; 30 percent is Jerry and similar soils, and 25 percent minor
<br />components. Lamphier soils are Fine - loamy, mixed Pachic Cryoborolls, while Jerry soils
<br />are Fine, montmorillonitic Argic Cryoborolls derived from colluvium and residuum
<br />derived from sandstone. Both soils are well - drained and deep. The Brushy Loam
<br />ecological site supports potential vegetation of Gambel's oak, Saskatoon serviceberry, elk
<br />sedge, mountain brome, Letterman's needlegrass, mountain snowberry, nodding brome,
<br />and slender wheatgrass. The minor soils are Moderately Deep Soils and similar soils,
<br />Skyway and similar soils, Danavore and similar soils, and rock outcrop.
<br />Map Unit 127: Maudlin - Duffymont complex, 3 to 15 percent slopes, very stony
<br />The elevation for this mapping unit is 6,500 -8,000 feet amsl. Annual precipitation is 16-
<br />18 inches and the frost -free period is 65 -85 days. Fifty percent of the mapping unit is
<br />Maudlin and similar soils,' 30 percent is Duffymont and similar soils, and 20 percent is
<br />minor components. Maudlin soils are Fine - loamy, mixed Typic Argiborolls and
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