2016-07-14_PERMIT FILE - M2016010

• Permit No: M2016010
• IBM Index Class Name: Permit File
• Doc Date: 7/14/2016
• Doc Name: Adequacy Review Response
• From: Transit-Mix Concrete Co.
• To: DRMS
• Email Name: AME
• Media Type: D
• Archive: No

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Transit Mix Concrete Co.
Table 7. Herbaceous Wetland: Cover and Height Estimates for Principal Plant Species
Common Name
Scientific Name
Height*
Absolute Cover
Forbs
Alsike clover
Trifolium hybridum
18 in
15
Grasses and Grass -like Species
Arctic rush
Juncus arcticus
24 in
50
Wheatgrass
Elymus sp.
30 in
7.5
Redtop bent grass
Agrostis gigantea or A.
stolonifera
30 in
7.5
III. Vegetation Communities and their Relationship to Soil Types and Topography
The Natural Resources Conservation Service (NRCS) has mapped eight soil map units (MU) on
the property (NRCS 2015), as shown in Appendix A, Figure 2. The site soils are also described
in Exhibit I. NRCS descriptions of the MUs are provided in Appendix B. Figure 3 provides an
overlay of the vegetation communities on soil type and Table 8 summarizes this relationship.
Figure 4 provides an overlay of the vegetation communities on topography shown in 40-foot
contours and Table 9 summarizes this relationship. Below, the relationship between vegetation
community, soil type, and topography is discussed in more detail.
The property occupies the rugged foothills of the Rocky Mountains, hilly terrain near the base of
the foothills, and flatter, more gently sloping terrain where terraces and alluvial fans have formed
below the foothills in the upper reaches of the piedmont. The mapped soils in the foothills (MUs
77 and 32) are characterized by a high percentage of exposed bedrock and associated shallow
soils. MU 76, which is characterized by fine sandy loam and shallow loam soils, is associated with
hilly terrain near the base of the foothills where they grade into the upper reaches of the piedmont.
This soil type extends into the fans and terraces of the piedmont in some areas. The predominant
soil types on the lower side slopes above the piedmont are MUs 57 and 58, and on the terraces
and fans are MUs 12, 13, and 55. All five of these MUs are composed of deep, sandy loams.
Montane mixed conifer forest is found exclusively in the foothills on MU 77, which is composed of
rock outcrop, gravelly/cobbly sandy loam, or sandy clay loam soils, often with bedrock starting at
13-17 inches below the surface. MU 77 is closely related to the extreme topography of the
foothills, making it difficult to distinguish the effects of soil type, topography, slope, and aspect on
the distribution of the mixed conifer forest. Within MU 77, mixed conifer occurs primarily on steep,
north -facing slopes and the slopes above the narrow riparian corridor associated with Little Turkey
Creek.
Mountain shrubland, pinyon -juniper woodland, and ponderosa pine woodland, which intergrade
extensively, are found primarily in the foothills and the less severe topography near the base of
Hitch Rack Ranch Quarry Permit Application M-2016-010
July 14, 2016 J-10