Appendix C
Description of Soil Units
Riparian Soil Units
0020AW: This unit consists of two major soils that are greater than 60 inches deep.
Elevation ranges from 4500 to 5200 feet. The mean annual precipitation is 25 to 60
inches. These soils are planar to complex, erosional and depositional, terraces, and
floodplains of weakly to moderately dissected glacial valley floors. They are somewhat
poorly to very poorly drained and have moderately slow to very rapid permeability. The
water table ranges from less than 2 feet to greater than 3 feet. The surface texture is silt
loam with some rock fragments. The soil textures below the surface layer are from sand
to clay loams, with rock fragments increasing with depth and averaging greater than 35
percent.
0058AW: This unit consists of three major soils that are greater than 60 inches deep.
Elevation ranges from 4300 to 5000 feet. The mean annual precipitation is 25 to 40
inches. These soils are planar to complex, erosional and depositional, floodplains, and
terraces of weakly to moderately dissected volcanic uplands. They are somewhat poorly
to very poorly drained and have moderately slow to very rapid permeability. The water
table ranges from less than 2 feet to greater than 5 feet. The surface texture is ashy silt
loam to sandy loam with some rock fragments. The soil textures below the surface layer
are from loamy sand to clay loams, with rock fragments increasing with depth and
averaging greater than 35 percent.
0060AW: This unit consists of two major soils that are greater than 60 inches deep.
Elevation ranges from 4600 to 5000 feet. The mean annual precipitation is 20 to 25
inches. These soils are planar to complex, erosional and depositional, terraces, and
floodplains of moderately to strongly dissected andesitic basalt flows. They are well to
very poorly drained and have moderate to very rapid permeability. The water table
ranges from less than 2 feet to greater than 4 feet. The surface textures are silt loam to
sandy loam, with some rock fragments usually less than 35 percent. The soil textures
below the surface layer are from silt loam to sand, with rock fragments increasing with
depth and averaging greater than 35 percent.
0070AW: This unit consists of one major soil that is greater than 60 inches deep and a
miscellaneous land type (Rockland). Elevation ranges from 4500 to 5500 feet. The mean
annual precipitation is 20 to 30 inches. These soils are planar to complex, intermediate
valleys, terraces, and floodplains of moderately dissected basalt flows. This soil is poorly
drained and has moderate permeability. The water table is greater than 5 feet. The
surface textures are silt loam to sandy loam, with some rock fragments usually less than
35 percent. The soil textures below the surface layer range from loam to sandy loam with
rock fragments increasing with depth and averaging greater than 35 percent.
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0130AW: This unit consists of three major soils that are greater than 60 inches deep.
Elevation ranges from 4000 to 5000 feet. The mean annual precipitation is 14 to 20
inches. These soils are planar to complex, erosional and depositional, floodplains, and
terraces of weakly to moderately dissected volcanic uplands. They are well to very
poorly drained and have moderately to moderately rapid permeability. The water table
ranges from less than 2 feet to greater than 5 feet. The surface texture is ashy silt loam
and loam to sandy loam, with some rock fragments usually less than 35 percent. The soil
textures below the surface layer are from ashy silt loam to ashy sandy loam and loam to
sandy clay loams with rock fragments increasing with depth and averaging greater than
35 percent.
0132AW: This unit consists of two major soils that are greater than 60 inches deep.
Elevation ranges from 4600 to 4700 feet. The mean annual precipitation is 20 to 30
inches. These soils are planar to complex, depositional, terraces, and toe slopes of
moderately to strongly dissected exotic terrane. They are poorly to very poorly drained
and have moderate to very rapid permeability. The water table ranges from less than 2
feet to greater than 5 feet. The surface textures are silt loam to loamy sand, with some
rock fragments usually less than 35 percent, but sometimes over 35 percent. The soil
textures below the surface layer are from loamy sand to sand with rock fragments
increasing with depth and averaging greater than 35 percent.
0133AW: This unit consists of two major soils that are greater than 60 inches deep.
Elevation ranges from 4300 to 5600 feet. The mean annual precipitation is 20 25 inches.
These soils are planar to complex, erosional and depositional, floodplains, and terraces of
weakly to moderately dissected alluvial valley fill. They are somewhat poorly to very
poorly drained and have moderate to rapid permeability. The water table ranges from
less than 2 feet to greater than 5 feet. The surface textures are silt loam to loamy sand
with some rock fragments usually less than 35 percent, but sometimes over 35 percent.
The soil textures below the surface layer range from sand loamy to loamy sand, with rock
fragments increasing with depth and averaging greater than 35 percent.
0135AW: This unit consists of two major soils that are greater than 60 inches deep.
Elevation ranges from 4000 to 5000 feet. The mean annual precipitation is 15 to 35
inches. These soils are planar to complex, depositional, terraces, and floodplains of
weakly to moderately dissected volcanic uplands. They are well to very poorly drained
and have moderate to rapid permeability. The water table ranges from less than 2 feet to
greater than 5 feet. The surface textures are silt loam to loamy sand with some rock
fragments usually less than 35 percent. The soil textures below the surface layer are from
silt loam to loamy sand, with rock fragments increasing with depth and averaging greater
than 35 percent.
Upland soil Units
0003AW (1A): This unit consists of three major soils that are greater than 60 inches in
depth. Elevation ranges from 4600 to 5000 feet. The mean annual precipitation is 20 to
35 inches. These soils are planar to complex, depositional and erosional, terraces, and
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floodplains of moderately to strongly disected andesitic basalt plateaus flows. They are
well to poorly drained and have moderate to very rapid permeability. The water table
ranges from 2 to 4 feet. The surface texture is loam to fine sandy loam with various
amounts of rock fragments usually less than 35 percent. The soil textures below the
surface layer are loam to sand, with rock fragments increasing in depth.
0704AO: This unit consists of two major soils that are greater than 60 inches deep.
Elevation ranges from 4000 to 5200 feet. The mean annual precipitation is 15 to 25
inches. These soils are planar to complex, depositional and erosional, terraces, and
floodplains of moderately to strongly dissected mixed acid crystalline outwash. They are
well to very poorly drained and have moderately slow to rapid permeability. The water
table ranges to greater than 5 feet. The surface texture is ashy, very fine, sandy loam with
some rock fragments usually less than 35 percent. The soil textures below the surface
layer are from silt loam to clay loam, with rock fragments increasing with depth and
averaging greater than 35 percent.
0704BO: This unit consists of two major soils that are greater than 60 inches deep.
Elevation ranges from 4000 to 5200 feet. The mean annual precipitation is 15 to 25
inches. These soils are planar to complex, depositional and erosional, terraces, and
floodplains of moderately to strongly dissected mixed acid crystalline outwash. They are
well to very poorly drained and have moderately slow to rapid permeability. The water
table ranges to greater than 5 feet. The surface texture is ashy, very fine, sandy loam with
some rock fragments, usually less than 35 percent. The soil textures below the surface
layer are from silt loam to clay loam, with rock fragments increasing with depth and
averaging greater than 35 percent.
0704CO: This unit consists of two major soils that are greater than 60 inches deep.
Elevation ranges from 4000 to 5200 feet. The mean annual precipitation is 15 to 25
inches. These soils are planar to complex, depositional and erosional, terraces, and
floodplains of moderately to strongly dissected mixed acid crystalline outwash. They are
well to very poorly drained and have moderately slow to rapid permeability. The water
table ranges to greater than 5 feet. The surface texture is ashy, very fine, sandy loam with
some rock fragments, usually less than 35 percent. The soil textures below the surface
layer are from silt loam to clay loam with rock fragments increasing with depth and
averaging greater than 35 percent.
1705BO (271B): This unit consists of two major soils that are 40 to 60 inches deep.
Elevation ranges from 4000 to 6200 feet. The mean annual precipitation is 20 to 35
inches. These soils are planar to complex, erosional and depositional, backslopes,
sideslopes, and shoulders of mountains. They are well-drained and have moderately
rapid to rapid permeability. The water table is greater than 5 feet. The surface texture is
ashy, very fine, sandy loam with some rock fragments, usually less than 15 percent. The
soil textures below the surface layer are from loam to clay loam with rock fragments
increasing with depth and averaging greater than 35 percent.
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1705CO (271C): This unit consists of two major soils that range from 40 to 60 inches in
depth. Elevation ranges from 4000 to 6200 feet. The mean annual precipitation is 20 to
35 inches. These soils are planar to complex, depositional of basalt ridges and benches.
They are well-drained and moderately rapid to rapid permeable. The water table is
greater than 6 feet. The surface texture is very fine sandy loam with various amounts of
rock fragments usually less than 15 percent. The soil textures below the surface layer are
loam to clay loam with rock fragments increasing in depth.
1706BO (275B): This unit consists of two major soils that are 10 to greater than 60
inches deep. Elevation ranges from 4000 to 6200 feet. The mean annual precipitation is
20 to 35 inches. These soils are planar to complex, erosional and depositional,
backslopes and toeslopes of dissected plateaus, and backslopes of mountains. They are
well-drained and have moderately slow to moderately rapid permeability. The water
table is greater than 5 feet. The surface texture ranges from ashy fine sandy loam to silt
loam with some rock fragments, usually less than 15 percent. The soil textures below the
surface layer are from loam to clay loam with rock fragments increasing with depth and
averaging greater than 35 percent.
1707CO (275C): This unit consists of three major soils that are 10 to 60 inches deep.
Elevation ranges from 4000 to 6200 feet. The mean annual precipitation is 20 to 30
inches. These soils are planar to complex, erosional and depositional, backslopes and
toeslopes of dissected plateaus, and backslopes of andesitic tuff breccia flows. They are
well-drained and have moderately slow to moderately rapid permeability. The water
table is greater than 5 feet. The surface texture ranges from ashy fine sandy loam to nonashy silt loam with some rock fragments, usually less than 35 percent, but sometimes are
greater than 35 percent. The soil textures below the surface layer are from clay loam to
loam, with rock fragments increasing with depth and averaging greater than 35 percent.
1708C (285C): This unit consists of two major soils that range from 40 to 60 inches in
depth. Elevation ranges from 4000 to 6200 feet. The mean annual precipitation is 20 to
35 inches. These soils are planar to complex, depositional erosional of backslopes of
mountains, and dissected plateaus of andesitic tuff breccia flows. They are well-drained
have moderate to moderately slow permeability. The water table is greater than 6 feet.
The surface texture is very fine sandy loam with various amounts of rock fragments,
usually less than 15 percent. The soil textures below the surface layer are loam to clay
loam with rock fragments increasing in depth.
3305BO (371B): This unit consists of two major soils that are 40 to greater than 60
inches deep. Elevation ranges from 4000 to 6200 feet. The mean annual precipitation is
30 to 45 inches. These soils are planar to complex, erosional and depositional,
backslopes and toeslopes of mountains and plateaus. They are well-drained and have
moderately slow permeability. The water table is greater than 5 feet. The surface texture
is ashy fine sandy loam with some rock fragments, usually less than 15 percent. The soil
textures below the surface layer are from loam to clay loam with rock fragments
increasing with depth and averaging greater than 35 percent.
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3312AO (381A): This unit consists of two major soils that are 40 to 60 inches deep.
Elevation ranges from 4000 to 6200 feet. The mean annual precipitation is 30 to 35
inches. These soils are planar to complex, erosional and depositional, backslopes and
toeslopes of mountain valley floors, and swales of rolling hills. They are well-drained
and have slow to moderately permeability. The water table is greater than 5 feet. The
surface texture is ashy fine sandy loam and loam with some rock fragments, usually less
than 15 percent. The soil textures below the surface layer are from clay to silt loam with
rock fragments increasing with depth and averaging greater than 35 percent.
3313BO (381B): This unit consists of two major soils that range from 20 to 60 inches
deep. Elevation ranges from 4000 to 6200 feet. The mean annual precipitation is 20 to
35 inches. These soils are planar to complex, depositional of sideslopes of mountains and
valley floors, and swales of rolling hills. They are well-drained and have moderate to
slow permeability. The water table is greater than 6 feet. The surface textures range
from ashy very fine sandy loam and loam to silt loam with various amounts of rock
fragments, usually less than 15 percent. The soil textures below the surface layer are clay
to loam with rock fragments increasing in depth and averaging greater than 35 percent.
3317BO (386B): This unit consists of two major soils that are greater than 60 inches
deep. Elevation ranges from 4000 to 6200 feet. The mean annual precipitation is 20 to
35 inches. These soils are planar to complex, depositional of sideslopes of mountains and
plateaus. They are well to moderately well-drained and have moderately slow to slow
permeability. The water table is greater than 6 feet. The surface textures range from
ashy very fine sandy loam with various amounts of rock fragments, usually less than 15
percent. The soil textures below the surface layer are clay to loam with rock fragments
increasing in depth and averaging greater than 35 percent.
3320BO (151B, 75B, 75B/C): This unit consists of two major soils that range from 10 to
40 inches deep. Elevation ranges from 4000 to 6200 feet. The mean annual precipitation
is 20 to 30 inches. These soils are planar to complex, depositional and erosional of
sideslopes of mountains and plateaus from soft-producing tuff. They are well-drained
with slow permeability. The water table is greater than 6 feet. The surface textures range
from clay loam to silt loam with various amounts of rock fragments, usually less than 35
percent, but sometimes greater than 35 percent. The soil textures below the surface layer
are clay to clay loam with rock fragments increasing in depth and averaging greater than
35 percent.
3433AO (5A): This unit consists of two major soils that are greater than 60 inches deep.
Elevation ranges from 4000 to 6200 feet. The mean annual precipitation is 30 to 45
inches. These soils are planar to complex, erosional and depositional, upland meadows
of moderately dissected basalt flows. They are well-drained with slow permeability. The
water table is greater than 5 feet. The surface texture is silt loam to silty clay loam with
some rock fragments, usually less than 15 percent. The soil textures below the surface
layer are from loam to clay, with rock fragments increasing with depth and averaging less
than 15 percent.
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4105BO (141B, 351B, 162B): This unit consists of two major soils that are 40 to greater
than 60 inches deep. Elevation ranges from 6200 to 7400 feet. The mean annual
precipitation is 30 to 45 inches. These soils are planar to complex, erosional and
depositional, backslopes, sideslopes, and shoulders of mountains. They are well-drained
and have moderate to moderately rapid permeability. The water table is greater than 5
feet. The surface texture is ashy fine sandy loam with some rock fragments, usually less
than 35 percent. The soil textures below the surface layer are from sandy loam to coarse
sandy loam, with rock fragments increasing with depth and averaging greater than 35
percent.
4105CO (141C, 160C, 351C, 162C, 732C): This unit consists of two major soils that
are 40 to greater than 60 inches deep. Elevation ranges from 6200 to 7400 feet. The
mean annual precipitation is 30 to 45 inches. These soils are planar to complex, erosional
and depositional, backslopes, sideslopes, and shoulders of mountains. They are welldrained and have moderate to moderately rapid permeability. The water table is greater
than 5 feet. The surface texture is ashy fine sandy loam with some rock fragments,
usually less than 35 percent. The soil textures below the surface layer are from sandy
loam to coarse sandy loam, with rock fragments increasing with depth and averaging
greater than 35 percent.
4116BO (143B, 177A, 177B): This unit consists of two major soils that are 40 to greater
than 60 inches deep. Elevation ranges from 5400 to 6200 feet. The mean annual
precipitation is 20 to 35 inches. These soils are planar to complex, erosional and
depositional, backslopes of ridges and mountains on dissected andesitic basalt flows.
They are well-drained and have moderate to moderately slow permeability. The water
table is greater than 5 feet. The surface texture is ashy fine sandy loam with some rock
fragments, usually less than 35 percent. The soil textures below the surface layer are
from loam to clay loam with rock fragments increasing with depth and averaging greater
than 35 percent.
4117CO (143C, 177C): This unit consists of three major soils that range from 10 to
greater than 60 inches in depth. Elevation ranges from 5400 to 6200 feet. The mean
annual precipitation is 20 to 35 inches. These soils are planar to complex, depositional
and erosional ridges of dissected andesitic basalt flows. They are well-drained with
moderate permeability. The water table is greater than 6 feet. The surface texture is ashy
very fine sandy loam and sandy loam with various amounts of rock fragments, usually
less than 35 percent. The soil textures below the surface layer are clay loam to coarse
sand, with rock fragments increasing in depth and averaging greater than 35 percent.
4120CO (144C): This unit consists of two major soils that range from 40 to 60 inches in
depth. Elevation ranges from 4000 to 6000 feet. The mean annual precipitation is 20 to
35 inches. These soils are planar to complex, depositional and erosional backslopes of
mountains of dissected andesitic basalt flows. They are well-drained and moderate
permeability. The water table is greater than 6 feet. The surface texture is ashy, very
fine, sandy loam with various amounts of rock fragments, usually less than 15 percent.
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The soil textures below the surface layer are clay loam to sandy loam, with rock
fragments increasing in depth and averaging greater than 35 percent.
5775BO (170A): This unit consists of two major soils that range from 20 to 60 inches in
depth. Elevation ranges from 4000 to 6200 feet. The mean annual precipitation is 25 to
45 inches. These soils are planar to complex, depositional of ridges and of dissected
basalt plateaus. They are well-drained with moderate to moderately slow permeability.
The water table is greater than 6 feet. The surface texture is ashy silt loam with various
amounts of rock fragments, usually less than 15 percent. The soil textures below the
surface layer are loam to coarse sandy loam, with rock fragments increasing in depth and
averaging greater than 35 percent.
5775CO (170C): This unit consists of two major soils that range from 20 to 60 inches in
depth. Elevation ranges from 4000 to 6200 feet. The mean annual precipitation is 25 to
45 inches. These soils are planar to complex, depositional of ridges, and of dissected
basalt plateaus. They are well-drained with moderate to moderately slow permeability.
The water table is greater than 6 feet. The surface texture is ashy silt loam with various
amounts of rock fragments, usually less than 15 percent. The soil textures below the
surface layer are loam to coarse sandy loam with rock fragments increasing in depth and
averaging greater than 35 percent.
5827BO (195B): This unit consists of two major soils that range from 10 to 40 inches in
depth. Elevation ranges from 4000 to 6000 feet. The mean annual precipitation is 15 to
30 inches. These soils are planar to complex, depositional plateaus and mountains of
dissected basalt flows. They are well-drained with moderately rapid to moderately slow
permeability. The water table is greater than 6 feet. The surface texture is silt loam to
loam with various amounts of rock fragments, usually less than 35 percent and sometimes
greater than 35 percent. The soil textures below the surface layer are loam to clay loam,
with rock fragments increasing in depth and averaging greater than 35 percent.
5830CO (195C): This unit consists of two major soils that range from 10 to 40 inches in
depth. Elevation ranges from 4000 to 6000 feet. The mean annual precipitation is 15 to
30 inches. These soils are planar to complex, depositional plateaus and mountains of
dissected basalt flows. They are well-drained with moderately rapid to moderately slow
permeability. The water table is greater than 6 feet. The surface texture is silt loam to
loam with various amounts of rock fragments, usually less than 35 percent and sometimes
greater than 35 percent. The soil textures below the surface layer are loam to clay loam,
with rock fragments increasing in depth and averaging greater than 35 percent.
5836AO (197A, 197A/B): This unit consists of two major soils that are 4 to 20 inches
deep. Elevation ranges from 4000 to 6000 feet. The mean annual precipitation is 20 to
35 inches. These soils are planar to complex, depositional, backslopes, plateau, and
mountains of moderately dissected basalt flows. They are well drained and have
moderate permeability. The water table is greater than 5 feet. The surface texture is
loam with some rock fragments usually less than 35 percent, but sometimes greater than
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35 percent. The soil textures below the surface layer have a texture of loam with rock
fragments increasing with depth and averaging greater than 35 percent.
5845AO (199A): This unit consists of two major soils that range from 4 to 40 inches in
depth. Elevation ranges from 4000 to 6000 feet. The mean annual precipitation is 20 to
35 inches. These soils are planar to complex, depositional plateaus and mountains of
dissected basalt flows. They are well-drained with moderate permeability. The water
table is greater than 6 feet. The surface texture is silt loam to loam with various amounts
of rock fragments, usually less than 35 percent, but sometimes greater than 35 percent.
The soil textures below the surface layer are loam to clay loam, with rock fragments
increasing in depth and averaging greater than 35 percent.
5845BO (199B): This unit consists of three major soils that range from 4 to 40 inches in
depth. Elevation ranges from 4000 to 6000 feet. The mean annual precipitation is 20 to
35 inches. These soils are planar to complex, depositional plateaus and mountains of
dissected basalt flows. They are well-drained with moderate permeability. The water
table is greater than 6 feet. The surface texture is silt loam to loam with various amounts
of rock fragments, usually less than 35 percent, but sometimes greater than 35 percent.
The soil textures below the surface layer are loam to clay loam, with rock fragments
increasing in depth and averaging greater than 35 percent.
5845CO (199C): This unit consists of three major soils that range from 4 to 40 inches in
depth. Elevation ranges from 4000 to 6000 feet. The mean annual precipitation is 20 to
35 inches. These soils are planar to complex, depositional plateaus and mountains of
dissected basalt flows. They are well-drained with moderate permeability. The water
table is greater than 6 feet. The surface texture is silt loam to loam with various amounts
of rock fragments usually, less than 35 percent, but sometimes greater than 35 percent.
The soil textures below the surface layer are loam to clay loam with rock fragments
increasing in depth and averaging greater than 35 percent.
7709BO (503B): This unit consists of two major soils that are 10 to 40 inches deep.
Elevation ranges from 4000 to 6000 feet. The mean annual precipitation is 20 to 35
inches. These soils are planar to complex, depositional, backslopes, of moderately
dissected uplifted metasedimentary mountains. They are well-drained and have moderate
to moderately rapid to rapid permeability. The water table is greater than 5 feet. The
surface textures are loam to sandy loam with some rock fragments, usually less than 35
percent, but sometimes greater than 35 percent. The soil textures below the surface layer
are from loam to coarse sandy loam, with rock fragments increasing with depth and
averaging greater than 35 percent.
7710AO (504A): This unit consists of three major soils that are 10 to 40 inches deep.
Elevation ranges from 4000 to 6000 feet. The mean annual precipitation is 15 to 30
inches. These soils are planar to complex, depositional, backslopes, of moderately
dissected uplifted metasedimentary mountains. They are well-drained and have
moderately rapid permeability. The water table is greater than 5 feet. The surface
textures are ashy silt loam to ashy fine sandy loam; silt loam to sandy loam with some
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rock fragments, usually less than 15 percent, but sometimes greater than 35 percent. The
soil textures below the surface layer are from sandy loam to coarse loamy sand with rock
fragments increasing with depth and averaging greater than 35 percent.
7712BO (504B): This unit consists of three major soils that are 10 to 40 inches deep.
Elevation ranges from 4000 to 6000 feet. The mean annual precipitation is 15 to 30
inches. These soils are planar to complex, depositional, backslopes, of moderately
dissected uplifted metasedimentary mountains. They are well-drained and have
moderately rapid permeability. The water table is greater than 5 feet. The surface
textures are silt loam to sandy loam with some rock fragments, usually less than 35
percent but sometimes greater than 35 percent. The soil textures below the surface layer
are from sandy loam to loamy sand, with rock fragments increasing with depth and
averaging greater than 35 percent.
7713BO (504C, 470C): This unit consists of three major soils that are 10 to 40 inches
deep. Elevation ranges from 4000 to 6000 feet. The mean annual precipitation is 15 to
30 inches. These soils are planar to complex, depositional, backslopes, of moderately
dissected uplifted metasedimentary mountains. They are well-drained and have
moderately rapid permeability. The water table is greater than 5 feet. The surface
textures are silt loam to sandy loam with some rock fragments, usually less than 35
percent but sometimes greater than 35 percent. The soil textures below the surface layer
are from sandy loam to loamy sand, with rock fragments increasing with depth and
averaging greater than 35 percent.
7714DO (504D): This unit consists of two major soils that are 10 to 40 inches deep and
miscellaneous land type (Rock Outcrop). Elevation ranges from 4000 to 6000 feet. The
mean annual precipitation is 15 to 30 inches. These soils are planar to complex,
depositional, backslopes, of moderately dissected uplifted metasedimentary mountains.
They are well-drained and have moderately rapid permeability. The water table is greater
than 5 feet. The surface textures are silt loam to sandy loam with some rock fragments,
usually less than 35 percent but sometimes greater than 35 percent. The soil textures
below the surface layer are from sandy loam to loamy sand, with rock fragments
increasing with depth and averaging greater than 35 percent.
7716BO (523B, 505B, 470B,): This unit consists of two major soils that are 20 to 60
inches deep. Elevation ranges from 4200 to 5400 feet. The mean annual precipitation is
25 to 35 inches. These soils are planar to complex, depositional, backslopes, of
moderately dissected uplifted metasedimentary mountains. They are well- drained and
have moderately rapid permeability. The water table is greater than 5 feet. The surface
textures are ashy silt loam to ashy sandy loam with some rock fragments, usually less
than 15 percent but sometimes greater than 15 percent. The soil textures below the
surface layer are from sandy loam to loamy sand, with rock fragments increasing with
depth and averaging greater than 35 percent.
7717BO (505C, 470C, 475CST, 520C): This unit consists of two major soils that are 40
to 60 inches deep. Elevation ranges from 4000 to 6,200 feet. The mean annual
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precipitation is 20 to 35 inches. These soils are planar to complex, depositional,
backslopes, of moderately dissected uplifted metasedimentary mountains. They are welldrained and have moderately rapid permeability. The water table is greater than 5 feet.
The surface textures are ashy silt loam to ashy sandy loam with some rock fragments,
usually less than 15 percent but sometimes greater than 15 percent. The soil textures
below the surface layer are from sandy loam to loamy sand with rock fragments
increasing with depth and averaging greater than 35 percent.
7721BO (509B): This unit consists of two major soils that are greater than 60 inches
deep. Elevation ranges from 4000 to 6000 feet. The mean annual precipitation is 15 to
30 inches. These soils are planar to complex, depositional, backslopes, of moderately
dissected uplifted metasedimentary mountains. They are well-drained and have
moderately rapid to moderately slow permeability. The water table is greater than 5 feet.
The surface textures are ashy silt loam to ashy sandy loam with some rock fragments,
usually less than 15 percent but sometimes greater than 15 percent. The soil textures
below the surface layer are from loam to sandy loam, with rock fragments increasing
with depth and averaging greater than 35 percent.
7727BO (515B, 515A, 523B): This unit consists of three major soils that are 20 to 60
inches deep. Elevation ranges from 5400 to 7200 feet. The mean annual precipitation is
30 to 45 inches. These soils are planar to complex, depositional, backslopes, of
moderately dissected uplifted metasedimentary mountains. They are well-drained and
have moderate to moderately rapid permeability. The water table is greater than 5 feet.
The surface textures are ashy fine sandy loam to sandy loam with some rock fragments,
usually less than 15 percent but sometimes greater than 15 percent. The soil textures
below the surface layer are from clay loam to coarse sandy loam, with rock fragments
increasing with depth and averaging greater than 35 percent.
7750CO (515C): This unit consists of two major soils that are 20 to greater than 60
inches deep. Elevation ranges from 4000 to 6000 feet. The mean annual precipitation is
15 to 30 inches. These soils are planar to complex, depositional, backslopes of
moderately dissected uplifted metasedimentary mountains. They are well-drained and
have moderately rapid permeability. The water table is greater than 5 feet. The surface
textures are ashy fine sandy loam and sandy loam with some rock fragments, usually less
than 15 percent. The soil textures below the surface layer are from silt loam to loamy
sand, with rock fragments increasing with depth and averaging greater than 35 percent.
7760BO (523B): This unit consists of two major soils that are 10 to 40 inches deep and
miscellaneous land type (Rock Outcrop). Elevation ranges from 4000 to 6200 feet. The
mean annual precipitation is 30 to 45 inches. These soils are planar to complex,
depositional, backslopes of moderately dissected uplifted metasedimentary mountains.
They are well-drained and have moderate to moderately rapid permeability. The water
table is greater than 5 feet. The surface textures are loam to sandy loam with some rock
fragments, usually less than 35 percent but sometimes greater than 35 percent. The soil
textures below the surface layer are from clay loam to sandy loam, with rock fragments
increasing with depth and averaging greater than 35 percent.
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