HomeMy WebLinkAboutSPRADLEY BARR DEALERSHIP PRELIMINARY PUD - 64 93B - SUBMITTAL DOCUMENTS - ROUND 1 - GEOTECHNICAL (SOILS) REPORT1 d
Soil name and
map symbol
•62—Cont.:
Stoneham part
Longmont:
63 -----
Loveland:
64 ____
LARIMER COUNTY AREA, COLORADO
TABLE 9. Building site development —Continued
Shallow I Dwellings without Dwellings with Small commercial
excavations basements I basements I buildings
Slight
Severe: wetness;
floods; too
clayey.
Severe: wetness;
floods.
Midway:
65 _________________
Severe: slope;
too clayey.
Minnequa:
66 _________________
Moderate: depth
to rock.
*67:
Minnequa part ____
Moderate: depth
to rock; slope.
LaPorte part -----
Severe: depth to
rock.
Miracle:
68 _________________
Severe: depth to
rock; slope.
Naz:
69-----------------
Slight-----------
70 _________________
Severe: slope
Nelson:
71 _________________
Severe: depth to
rock.
Newfork:
Severe: wetness;
small stones;
floods.
Moderate: too
clayey.
Severe:
wetness.
Moderate: frost
action; shrink -
swell.
Severe: wetness;
floods.
Severe: floods;
wetness.
Severe: slope;
shrink -swell.
Slight
Moderate:
slope.
Severe: depth to
rock.
Severe: slope
Slight -----------
Severe: slope ----
Moderate: depth
to rock.
Severe: floods;
wetness.
Severe:
shrink -swell.
Severe:
shrink -swell.
Otero:
77----------------- Slight ----------- Slight-------
78, 79 ______________ Slight ----------- Slight -------
*80:
Otero part ------- Severe: slope ____ Severe: slope
Nelson part ______ Severe: depthto Severe: slope
rock; slope.
Moderate: frost
action;
shrink -swell.
Severe: wetness;
floods.
Severe: floods;
wetness.
Severe: slope;
shrink -swell;
depth to rock.
Moderate: depth
to rock.
Moderate: depth
to rock; slope.
Severe: depth to
rock.
Severe: slope;
depth to rock.
Slight -----------
Severe: slope ----
Severe: depth to
rock.
Severe: floods;
wetness.
Moderate: slope;
shrink -swell;
frost action.
Severe: wetness;
floods; corrosive.
Severe: wetness;
floods; corrosive.
139
Local roads and
streets
Severe: low
strength.
Severe: frost
action; wetness;
shrink -swell.
Severe: frost
action; wetness;
shrink -swell.
Severe: slope;
Severe: slope;
shrink -swell;
shrink -swell.
corrosive.
Moderate:
Moderate: low
slope.
strength.
Severe: slope ____
Moderate: low
strength; slope.
Severe: depth to
Severe: depth to
rock.
rock.
Severe: slope ____
Severe: slope.
Slight -----------
Severe: slope ----
Moderate: depth
to rock; slope;
corrosive.
Severe: floods;
wetness.
Moderate:
Severe:
shrink -swell.
shrink -swell;
corrosive.
Severe:
Severe:
wetness.
shrink -swell;
corrosive.
Slight -----------
Slight -------
Slight -----------
Moderate:
slope.
Severe: slope ____
Severe: slope
Severe: depth to
Severe: slope
rock; slope.
Moderate: frost
action.
Severe: slope.
Moderate: depth
to rock; frost
action.
Severe: floods;
wetness.
Severe: shrink -
swell; low
strength.
Severe: shrink -
swell; low
strength.
Slight.
Slight.
Severe: slope.
Severe: slope.
Soil name and
map symbol
Elbeth:
•30:
Elbeth part _
Moen part ___
Farnuf:
31 ------------
*32:
Farnuf part
Boyle part .
Rock outcrop part.
Fluvaquents:
33 ----------------
Fort Collins:
34, 35-------------
36, 37
Foxcreek:
38 ____
Gapo:
39 .
Garrett:
40 -----------------
41 -----------------
Gravel pits:
42.
Haploborolls:
*43:
Haploborolls part_.
Rock outcrop part.
Haplustolls:
44 -----------------
*45:
Haplustolls part _.
Rock outcrop part.
Harlan:
46 ----------------
47----------------
LARIMER COUNTY AREA, COLORADO
TABLE 9. Building site development —Continued
Shallow ( Dwellings without I Dwellings with I Small commercial
excavations basements basements buildings
Severe: slope
Severe: slope;
depth to rock.
Slight -------
Severe: slope .
Severe: slope;
depth to rock;
small stones.
Severe: floods
Slight -------
Slight
Severe: wetness;
cutbankscave;
small stones.
Severe:
wetness.
Moderate:
floods.
Slight __.
Severe: slope
Severe: slope
Severe: slope
Slight
Slight
Severe: slope
Severe: slope
Moderate:
shrink -swell;
low strength.
Severe: slope .
Severe: slope;
depth to rock.
Moderate:
shrink -swell;
low strength.
Severe: slope ----I Severe: slope
Severe: slope ____ Severe: slope;
depth to rock.
Severe: floods ---
Moderate: low
strength; frost
action.
Moderate: low
strength; frost
action.
Severe: wetness;
floods; frost
action.
Severe:
wetness..
Severe: floods
Slight -------
Severe: slope
Severe: slope
Severe: slope
Moderate: low
strength.
Moderate: low
strength.
Severe: floods ---
Moderate: low
strength; frost
action.
Moderate: low
strength; frost
action.
Severe: wetness;
floods; frost
action.
Severe:
wetness.
Severe: slope
Severe: slope
Moderate:
shrink -swell.
Severe: slope .
Severe: slope;
depth to rock.
Severe: floods ---
Moderate: low
strength; frost
action.
Moderate: slope;
low strength;
frost action.
Severe: wetness;
floods; frost
action.
Severe: wetness;
corrosive.
Severe: floods ___ Severe: floods;
corrosive.
Slight ___________ Slight:
corrosive.
Severe: slope ____I Severe: slope ___-
Severe: slope
Severe: slope
Moderate: low
strength.
Moderate: low
strength.
Severe: slope
Severe: slope
Moderate: low
strength.
Moderate: slope;
low strength.
137
Local roads and
streets
Severe: slope.
Severe: slope.
Moderate: frost
action; shrink -
swell; low
strength.
Severe: slope.
Severe: slope;
depth to rock.
Severe: floods.
Moderate: low
strength; frost
action.
Moderate: low
strength.
Severe: wetness;
frost action.
Severe: wetness;
frost action.
Moderate: floods.
Moderate: low
strength.
I Severe: slope.
Severe: slope.
Severe: slope.
Severe: low
strength.
Severe: low
strength.
132
SOIL SURVEY
TABLE 8.-Soil and water features -Continued
Soil name and
map symbol
Hydro-
logic
group
Flooding
Depth to
seasonal
high
water
Bedrock
Potential
frost
action
Frequency
Duration
Months
Depth
Hardness
table
Feet
lnehee
Kirtley—Continued :
`58:
Kirtley part ________
C
None ________
______________
______________
>6.0
20-40
Rippable __
Moderate.
Purner part ________
D
None ________
______________
______________
>6.0
10-20
Hard _____
Low.
LaPorte:
*59:
LaPorte part _______
C
None ______________________
______________
>6.0
10-20
Rippable __
Low.
Rock outcrop part.
Larim:
60-------------------
A
None --------
--------------
--------------
>6.0
>60
-----------
Low.
Larimer:
61-------------------
B
None --------
--------------
--------------
>6.0
>60
-----------
Low.
•62:
Larimer part -------
B
None --------
--------------
--------------
>6.0
>60
-----------
Low.
Stoneham part _____
B
None ________
______________
______________
>6.0
>60
___________
Moderate.
Longmont:
63 ___________________
C
Common ____
Brief _______
March -July __
2.0-2.5
>60
___________
High.
Loveland:
64 ___________________
C
Common ____
Very brief ___
March-
1.5-2.5
>60
___________
High.
September.
Midway:
65 ___________________
D
None --------
______________
--------------
>6.0
10-20
Rippable __
Moderate.
Minnequa:
66 ___________________
B
None ________
______________
______________
>6.0
20-40
Rippable __
Low.
*67:
Minnequa part _____
B
None ________
______________
______________
>6.0
20-40
Rippable __
Low.
LaPorte part _______
C
None ________
______________
______________
>6.0
10-20
Rippable __
Low.
Miracle:
68 ___________________
B
None ________
______________
______________
>6.0
2040
Hard _____
Moderate.
Naz:
69. 70 ________________
A
None ________
--------------
______________
>6.0
>60
Hard _____
Moderate.
Nelson:
71 ___________________
B
None --------
______________
______________
>6.0
20-40
Rippable __
Low.
Newfork:
72 ___________________
D
Occasional ___
Brief _______
April -July ___
0.54.0
>60
___________
Low.
Nunn:
73. 74, 75-------------
C
None ____ ------------------
--------------
>6.0
>60
-----------
Moderate.
76-------------------
C
None --------
--------------
--------------
1.5-2.5
>60
-----------
Moderate.
Otero:
77, 78, 79 -------------
B
None --------
--------------
--------------
>6.0
>60
-----------
Low.
•90:
Otero part ---------
B
None ----------------------
--------------
>6.0
>60
- --- ---
Low.
Nelson part ________
B
None ________
______________
______________
>6.0
20-40
Rippable __
Low.
Paoli:
81 ___________________
B
Rare ________
Very brief ___
May -June ___
>6.0
>60
___________
Moderate.
Pendergrass:
•82:
Pendergrass part ___
D
None ______________________
______________
>6.0
10-20
Hard _____
Low.
Rock outcrop part.
LARIMER COUNTY AREA, COLORADO
131
TABLE 8. Soil and water features —Continued
Soil name and
map symbol
Hydro-
logic
Flooding
Depth to
seasonal
high
Bedrock
Potential
frost
group
Frequency
Duration
Months
table toDepth
Hardness
action
Feet
Inches
Elbeth:
*30:
Elbeth part ________
B
None ________
______________
______________
>6.0
>60
___________
Moderate.
Moen part _________
C
None ________
______________
______________
>6.0
20-40
Hard _____
Moderate.
Farnuf :
31 ___________________
B
None ________
--------------
--------------
>6.0
>60
___________
Moderate.
*32:
Farnuf part ________
B
None ________
--------------
--------------
>6.0
>60
___________
Moderate.
Boyle part _________
D
None ________
______________
______________
>6.0
9-20
Rippable __
Moderate.
Rock outcrop part.
Fluvaquents:
33 ___________________
________
Frequent ____
Brief _______
April -June ___
0.5-25
>60
___________
Low.
Fort Collins:
34. 35. 36, 37 __________
B
None ________
--------------
--------------
>6.0
>60
___________
Moderate.
Foxcreek:
38 ___________________
C
Rare ________
Brief _______
April -May ___
0-0.5
>60
-----------
High.
Gapo:
39-------------------
D
None --------
--------------
--------------
3.0
>60
-----------
High.
Garrett:
40 ___________________
B
Rare --------
Very brief ___
_ -------------
>6.0
>60
-----------
Moderate.
41-------------------
B
None --------
--------------
--------------
>6.0
>60
-----------
Moderate.
Gravel pits:
42.
Haploborolls:
*43:
Haploborolls part ---
--------
None --------
--------------
--------------
>6.0
----------
-----------
Rock outcrop part:
Haplustolls:
44 -------------------
--------
None --------
--------------
--------------
>6.0
----------
-----------
*45:
Haplustolls part ____
--------
None ________
___________ ---
--------------
>6.0
_ ---------
-----------
Rock outcrop part.
Harlan:
46, 47----------------
B
None --------
--------------
--------------
>6.0
>60
-----------
Moderate.
Heldt:
48, 49----------------
C
None --------
--------------
--------------
>6.0
>60
-----------
Moderate.
Keith:
50-------------------
B
None --------
--------------
--------------
>6.0
>60
-----------
Moderate.
Kildor:
51 ___________________
C
None ________
--------------
--------------
>6.0
20-40
Rippable __
High.
*52:
Kildor part ________
C
None ________
_ ______
-------
______________
>60
.-40
20
Rippable
ppable __
High.
Shale outcrop part.
Kim:
53, 54, 55 _____________
B
None --------
--------------
--------------
>6.0
>60
-----------
Moderate.
*56:
Kim part __________
B
None ________
______________
______________
>6.0
>60
___________
Moderate.
Thedalund part _____
C
None ________
______________
______________
>6.0
20-40
Ri ppable __
Moderate.
Kirtley:
57 ___________________
C
None ________
_ _____________
______________
>6.0
20-40
Rippable __
Moderate.
LARIMER COUNTY AREA, COLORADO
43
Capability units IIe-1, irrigated, and IIIe-6, dryland;
Clayey Foothill range site; windbreak suitability group
1.
75—Nunn clay loam, 3 to 5 percent slopes. This
gently sloping soil is on high terraces and fans. This
soil has a profile similar to the one described as rep-
resentative of the series, but the combined thickness
of the surface layer and subsoil is about 24 inches.
Included with this soil in mapping are small areas
of soils that are more sloping or less sloping and a few
small areas of soils that have a surface layer of light
clay. Also included are a few small areas of Satanta
and Ulm soils.
Runoff is medium. The hazard of water erosion is
moderate, and the hazard of wind erosion is slight.
If irrigated, this soil is suited to barley, alfalfa, and
wheat and, to a lesser extent, corn, sugar beets, and
beans. Under dryland management it is suited to wheat
or barley. It is also well suited to pasture and native
grasses. Capability units IIIe-2, irrigated, and IIIe-7,
dryland; Clayey Foothill range site; windbreak suit-
ability group 1.
76—Nunn clay loam, wet, 1 to 3 percent slopes. This
nearly level, somewhat poorly drained soil is on low
terraces and alluvial fans, commonly adjacent to
drainageways. This soil has a profile similar to the one
described as representative of the series, but a seasonal
high water table is at a depth of 20 to 30 inches during
part of the growing season.
Included with this soil in mapping are a few small
areas of soils that have a strongly alkaline surface
layer and a few small areas of soils that are moderately
well drained. Also included are a few areas of soils
that have a surface layer of loam or clay and a few
areas of soils that are less sloping.
Runoff is slow, and the hazard of erosion is slight.
This soil is suited to pasture and hay. If the water
table is lowered by management practices, corn, sugar
beets, wheat, and barley can be grown. Capability unit
IIlw-1, irrigated; Wet Meadow range site; windbreak
suitability group 5.
Otero Series
The Otero series consists of deep, well drained soils
that formed in alluvium and wind -deposited material.
These soils are on alluvial fans and terraces. Elevation
ranges from 4,800 to 5,600 feet. Slopes are 0 to 15
percent. The native vegetation is mainly blue grama,
needlegrass, bluestems, and some forbs and shrubs.
Mean annual precipitation ranges from 13 to 15 inches,
mean annual air temperature ranges from 48' to 50'
F, and the frost -free season ranges from 135 to 150
days.
In a representative profile the surface layer is brown
sandy loam about 4 inches thick. The underlying
material is pale brown sandy loam about 13 inches
thick over light brownish gray sandy loam.
Permeability is rapid, and the available water ca-
pacity is medium. Reaction is mildly alkaline above a
depth of about 4 inches and moderately alkaline below
that depth.
These soils are used mainly for native grasses and
for dryfarmed crops. A few areas are used for ir-
rigated crops.
Representative profile of Otero sandy loam in an
area of Otero -Nelson sandy loams, 3 to 25 percent
slopes, in native grass, about 300 feet south and 1,420
feet west of the northeast corner of sec. 11, T. 10 N.,
R. 68 W.:
Al' 0 to 4 inches; brown (10YR 5/3) sandy
loam, dark brown (10YR 3/3) moist;
weak very fine granular structure; soft,
very friable; calcareous; mildly alka-
line; clear smooth boundary.
Clca-4 to 17 inches; pale brown. (10YR 6/3)
sandy loam, brown . (10YR 5/3) moist;
weak medium and coarse subangular
blocky structure; hard, very friable; cal-
careous; visible calcium carbonate as few
soft spots; moderately alkaline; gradual
smooth boundary.
C2ca-17 to 60 inches; light brownish gray
(10YR 6/2) sandy loam, dark grayish
brown (10YR, 4/2) moist; massive; hard,
very friable; calcareous; visible calcium
carbonate as few soft spots; moderately
alkaline.
The A horizon is sandy loam or fine sandy loam 8 to
12 inches thick in cultivated areas. The C horizon is
sandy loam or fine sandy loam. The soil is generally
calcareous throughout, but the surface layer is leached
in places. Distribution of lime in the profile is erratic.
Soft sandstone is at a depth of 40 to 60 inches in some
profiles.
77—Otero sandy loam, 0 to 3 percent slopes. This
nearly level soil is on uplands and fans. This soil has a
profile similar to the one described as representative of
the series, but the surface layer is about 10 to 12
inches thick.
Included with this soil in mapping are some small
areas of soils that have a surface layer of loam or fine
sandy loam. Also included are some areas of soils that
are redder and a few small areas of Ascalon, Nelson,
and Kim soils.
Runoff is slow. The hazard of water erosion is slight,
and the hazard of wind erosion is moderate.
If irrigated, this soil is suited to corn, barley, sugar
beets, wheat, and beans. Under dryland management
it is suited to pasture and native grasses and, to a
lesser extent, wheat and barley. Capability units
IIIe-5, irrigated, and IVe-5, dryland; Sandy Plains
range site; windbreak suitability group 2.
78—Otero sandy loam, 3 to 5 percent slopes. This
gently sloping soil is on uplands and fans. This soil
has a profile similar to the one described as representa-
tive of the series, but the surface layer is about 8
inches thick.
Included with this soil in mapping are a few small
areas of soils that are more sloping or less sloping.
Also included are some small areas of soils in which
sandstone is at a depth of 40 to 60 inches and a few
small areas of Ascalon, Nelson, and Kim soils.
Runoff is medium, and the hazard of erosion is
moderate.
If irrigated, this soil is suited to barley, wheat,
alfalfa, and pasture and, to a lesser extent, corn and
beans. Under dryland management it is well suited to
pasture and native grasses. Capability units IIIe-4,
irrigated, and VIe-2, dryland; Sandy Plains range
site; windbreak suitability group 2.
SOIL SURVEY
4/3) moist; moderate medium and coarse
prismatic structure parting to moderate
medium subangular blocky; very hard,
firm, very sticky and very plastic; thin
nearly continuous clay films on peds;
noncalcareous; mildly alkaline; clear
smooth boundary.
B3ca-24 to 29 inches; pale brown (10YR 6/3)
clay loam, brown (10YR 5/3) moist;
weak medium subangular blocky struc-
ture; very hard, firm, very plastic; few
thin patchy films. on ped faces; visible
calcium carbonate occurring as small
nodules; calcareous; moderately alka-
line; gradual smooth boundary.
Clea-29 to 47 inches; light yellowish brown
(10YR 6/4) clay loam, dark yellowish
brown (10YR 4/4) moist; massive; very
hard, firm, sticky and plastic; visible
calcium carbonate occurring as nodules,
thin seams, and streaks; calcareous;
moderately alkaline; gradual smooth
boundary.
C2ca-47 to 60 inches; light yellowish brown
(2.5Y 6/3) clay loam, light olive brown
(2.5Y 5/3) moist; massive; very hard,
firm, sticky and plastic; some visible
calcium carbonate but less than in the
Clea horizon; calcareous; moderately
alkaline.
The A horizon is light clay loam or clay loam 10 to
12 inches thick in cultivated areas. The combined thick-
ness of the A and B horizons ranges from 16 to 40
inches. The B2t horizon is heavy clay loam or light
clay. Depth to calcareous material ranges from 10 to
30 inches. Sand and gravel are below a depth of 40
inches in some profiles. Some profiles have substrata
with a redder hue.
73—Nunn clay loam, 0 to 1 percent slopes. This
level soil is on high terraces and fans. This soil has a
profile similar to the one described as representative of
the series, but the combined thickness of the surface
layer and subsoil is about 35 inches.
Included with this soil in mapping are small areas
of soils that are more sloping. Also included are a few
small areas of Satanta, Fort Collins, and Ulm soils and
a few small areas of soils that have a surface layer and
subsoil of silty clay loam.
Runoff is slow, and the hazard of erosion is slight.
If irrigated, this soil is suited to corn, sugar beets,
beans, barley, wheat, and alfalfa. Under dryland
management it is suited to wheat or barley. It is also
suited to pasture and native grasses. Capability units
IIs-1, irrigated, and IIIe-1, dryland; Clayey Foothill
range site; windbreak suitability group 1.
74—Nunn clay loam, 1 to 3 percent slopes. This
nearly level soil is on high terraces and fans. This soil
has the profile described as representative of the
series.
Included with this soil in mapping are a few small
areas of soils that are more sloping or less sloping and
a few small areas of soils that have a surface layer and
subsoil of silty clay loam. Also included are small areas
of Satanta, Fort Collins, and Ulm soils.
Runoff is slow to medium, the hazard of wind erosion
is slight, and the hazard of water erosion is moderate.
If irrigated, this soil is suited to corn, sugar beets,
beans, barley, alfalfa, and wheat. Under dryland
management it is suited to wheat and barley. It is also
well suited to pasture or native grasses (fig. 10).
Figure 10. Alfalfa bales on Nunn clay loam, 1 to 3 percent slopes.
LARIMER COUNTY AREA, COLORADO
25
Runoff is slow, and the hazards of wind and water
erosion are slight to moderate.
If irrigated, this soil is well suited to corn, sugar
beets, alfalfa, barley, and dry beans. Under dryland
management it is suited to wheat and barley. It is also
well suited to pasture and native grasses. Capability
units IIe-1, irrigated, and IVe-3, dryland; Loamy
Plains range site; windbreak suitability group 1.
36—Fort Collins loam, 3 to 5 percent slopes. This
gently sloping soil is on the edges of terraces and fans.
This soil has a profile similar to the one described as
representative of the series, but the combined thick-
ness of the surface layer and subsoil is about 20 inches.
Included with this soil in mapping are a few areas
of soils that are more sloping or less sloping. Also in-
cluded are small areas of Stoneham and Kim soils and
a few areas of soils that have a gravelly surface layer.
Runoff is moderate, and the hazards of wind and
water erosion are moderate.
If irrigated, this soil is suited to corn, barley, and
alfalfa and, to a lesser extent, sugar beets and dry
beans. Under dryland management it is suited to
wheat and barley. It is also well suited to pasture and
native grasses. Capability units IIIe-2, irrigated, and
IVe-3, dryland; Loamy Plains range site; windbreak
suitability group 1.
37—Fort Collins loam, 5 to 9 percent slopes. This
strongly sloping soil is on terrace edges and the steeper
part of fans. This soil has a profile similar to the one
described as representative of the series, but the com-
bined thickness of the surface layer and subsoil is
about 18 inches.
Included with this soil in mapping are a few small
areas of soils that are more sloping or less sloping and
a few small areas of soils that have a gravelly surface
layer. Also included are small areas of Larimer,
Stoneham t and Kim soils.
Runoff Is rapid, and the hazards of wind and water
erosion are severe.
If irrigated, this soil is suited to alfalfa and barley
and other small grain or pasture. It is suited to pasture
or native grasses under dryland management. Capa-
bility units IVe-1, irrigated, and VIe-1, dryland;
Loamy Plains range site; windbreak suitability
group 1.
Foxcreek Series
The Foxcreek series consists of deep, poorly drained
soils that formed in alluvium. These soils are on low
terraces and bottom lands and are underlain by sand
and gravel at a depth of 20 to 40 inches. Elevation
ranges from 7,800 to 8,800 feet. Slopes are 0 to 3
percent. The native vegetation is mainly timothy, red -
top, sedges, and other water -tolerant grasses. Mean
annual precipitation ranges from 12 to 16 inches,
mean annual air temperature ranges from 42' to 46'
F, and the frost -free season ranges from 60 to 85 days.
In a representative profile a 1-inch-thick layer of
organic material is on the surface. The surface layer
is mottled dark. brown loam about 5 inches thick. The
subsoil is mottled dark grayish brown or brown silty
clay loam about 17 inches thick. The underlying ma-
terial is mottled brown sandy clay loam about 14
inches thick over sand and gravel.
Permeability is moderate above a depth of about 36
inches and very rapid below that depth. The available
water capacity is medium to high. Reaction is slightly
acid above a depth of about 22 inches and neutral
below that depth.
These soils are mainly used for irrigated hay.
Representative profile of Foxcreek loam, 0 to 3 per-
cent slopes, in irrigated hayland, 400 feet south of
Hohnholtz Lake Road, west of the Laramie River in
sec. 7, T. 11 N., R. 67 W.:
0-1 inch to 0; undecomposed and partly decom-
posed organic material.
Alg-0 to 5 inches; dark brown (7.5YR 3/2)
loam, dark brown (7.5YR 3/2) moist;
common fine distinct dark reddish brown
(2.5YR 3/4) mottles; weak moderate
subangular blocky structure; hard, fri-
able; slightly acid; clear smooth bound-
ary.
B2g-5.to 17 inches; dark grayish brown (10YR
4/2) silty clay loam, very dark grayish
brown (10YR 3/2) moist; common me-
dium distinct red (2.5YR 4/6) mottles;
weak medium subangular and angular
blocky structure; hard, friable; slightly
acid; clear smooth boundary.
B3g-17 to 22 inches; brown (10YR 4/3) silty
clay loam, brown (10YR 4/3) moist;
common fine distinct yellowish red (5YR
4/6) mottles; weak to moderate medium
subangular blocky structure; very hard,
firm; slightly acid; clear smooth bound-
ary.
C1g-22 to 36 inches; brown (10YR 5/3) sandy
clay loam, brown (10YR 4/3) moist;
common medium distinct yellowish red
(5YR 4/6) mottles; massive; hard, fri-
able; neutral; clear smooth boundary.
IIC2cag-36 to 60 inches; sand and gravel; very
slightly effervescent; calcium carbonate
on underside of pebbles.
The A horizon is loam, clay loam, or silty clay loam
3 to 8 inches thick. It is slightly acid to neutral. The
Bg horizon is loam, light clay loam, or silty clay loam.
It is slightly acid to neutral. The C and IIC horizons
are generally neutral or mildly alkaline. The IIC hori-
zon is very slightly effervescent to strongly efferves-
cent and weak accumulations of calcium carbonate are
mainly on the underside of pebbles.
38—Foxcreek loam, 0 to 3 percent slopes. This
nearly level soil is on low terraces and bottom lands.
Included with this soil in mapping are a few small
areas of Blackwell and Newfork soils. Also included
are a few small areas of soils that have a cobbly and
stony surface layer.
Runoff is slow, and the hazard of water erosion is
slight.
If irrigated, this soil is suited to hay and meadow.
It is also suited to pasture or native grasses. Capability
unit VIw-1, irrigated; Mountain Meadow range site;
not assigned to a windbreak suitability group.
Gapo Series
The Gapo series consists of deep, poorly drained
24
SOIL SURVEY
films on peds; noncalcareous; neutral;
clear smooth boundary.
B2-8 to 18 inches; brown (10YR 5/3) heavy
loam, dark brown (10YR 4/3) moist;
moderate medium prismatic structure
parting to moderate fine subangular
blocky; very hard, very friable; many
thin patchy clay films on peds and in
root channels and pores; noncalcareous ;
mildly alkaline; gradual smooth bound-
ary.B3ca-18 t24 inches; pale brown (10YR 6/3)
loam, brown (10YR 5/3) moist; weak
medium subangular blocky structure;
hard, very friable; few thin patchy clay
films on peds and in some root channels;
some visible secondary calcium carbon-
ate occurring mostly as concretions; cal-
careous; moderately alkaline; gradual
smooth boundary.
Cca-24 to 60 inches; pale brown (10YR 6/3)
loam, brown (10YR 5/3) moist; mas-
sive; hard, very friable; visible calcium
carbonate occurring as concretions and
in thin seams and streaks; calcareous;
moderately alkaline; gradual smooth
boundary.
The A horizon is loam or light clay loam 5 to 13
inches thick. The combined thickness of the A and B
horizons is 15 to 30 inches. The B2 horizon is loam to
light clay loam.
34—Fort Collins loam, 0 to 1 percent slopes. This
level soil is on terraces and fans. This soil has the
Profile described as representative of the series.
Included with this soil in mapping are a few small
areas of soils that are more sloping. Also included are
small areas of soils that have a surface layer of clay
loam and small areas of Stoneham soils.
Runoff is slow, and the hazard of erosion is slight.
If irrigated (fig. 5), this soil is well suited to corn,
sugar beets, alfalfa, barley, and dry beans. Under dry -
land management it is suited to wheat and barley. It
is also well suited to pasture and native grasses. Capa-
bility unit I, irrigated; Loamy Plains range site;
windbreak suitability group 1.
35—Fort Collins loam, 1 to 3 percent slopes. This
nearly level soil is on terraces and fans. This soil has a
profile similar to the one described as representative
of the series, but the combined thickness of the surface
layer and subsoil is about 22 inches.
Included with this soil in mapping are a few small
areas of soils that are more sloping or less sloping. Also
included are some small areas of Stoneham and Kim
soils and a few small areas of soils that have a gravelly
layer below a depth of 40 inches.
Figure 5.—Furrow irrigation on Fort Collins loam, 0 to I percent slopes.
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This soil survey was compiled in 1978 by 5000 4000 3000 2000 1000 0
the U.S. Department of Agriculture, Soil
Conservation Service and cooperating
eeenr•ix
SPRADLEY BARR PUD
PHYSIOGRAPHIC DATA
October 25, 1993