HomeMy WebLinkAbout20251033.tiffExhibit 12
Page 1
EXHIBIT 12
SOIL REPORT
The soil report must be prepared by NRCS or soils engineer.
Weld County Code Design Standards Section 23-2-240.A:
An applicant for a Use by Special Review shall demonstrate compliance with the following design standards in the
application and shall continue to meet these standards if approved for development.
(1) If soil conditions on the site are such that they present moderate or severe limitations to the construction of
structures or facilities proposed for the site, the applicant has demonstrated how such limitations can and
will be mitigated.
(11) Uses by Special Review in the A (Agricultural) Zone District shall be located on the least prime soils on the
property in question unless the applicant can demonstrate why such a location would be impractical or
infeasible.
A Geotechnical Investigation Report prepared by CTL Thompson is attached as Exhibit 12-1.
Table 12-1 summarizes the mapped soil series and their properties within the Permit Area. The USDA NRCS Soil
Survey for the Permit Area is attached as Exhibit 12-2.
TABLE 12-1. SOILS SERIES IDENTIFIED WITHIN THE PERMIT AREA
Map
Symbol
Unit
Drainage
Class
..
Hydr�c
Farmland
Classification
.
Percent of
Permit
Soil
Rating
Soil Type
Area
69
Valent sand, 0
slopes
to 3 percent
0
Farmland of local
34.9
Excessively
drained
importance
,.
70
Valent sand, 3 to 9 percent
slopes
Excessively
drained
0
Not
Prime Farmland
63.7
72
Vona loamy sand, 0 to 3
percent slopes
Well drained
0
Farmland of local
1.4
importance
Source: USDA NRCS 2023.
Two soil types, the Valent sand, 0 to 3 percent slopes (69), representing 34.9 percent of soils within the Permit Area,
and Vona loamy sand, 0 to 3 percent slopes (70) representing 1.4 percent of the Permit Area, are both defined as
farmland of local importance. The soil type comprising the remaining 63.7 percent of the Permit Area, Valent sand,
3 to 9 percent slopes (70), is classified as not prime farmland (USDA NRCS 2023).
The Weld County Development Code does not define "least prime soils." The soils classified as farmland of local
importance within the Permit Area are currently impacted by existing oil and gas construction and not optimal for
farming. It would not be feasible for the proposed Project to avoid activities in soils classified as farmland of local
importance, given their extent. In addition, CSC will implement concurrent reclamation throughout the life -of -mine,
Colorado Sand Company II, LLC - Kersey Mine
Use By Special Review Permit Application Package
Date prepared: October 14, 2024
Date last revised:
Exhibit 12
Page 2
wherein salvageable growth medium will be pre -stripped ahead of milling and then replaced atop a previously mined
area. After the regular operations cease and the land is reclaimed, soil conditions in the Permit Area will either
return to their pre -mining state or be improved.
Colorado Sand Company II, LLC - Kersey Mine
Use By Special Review Permit Application Package
Date prepared: October 14, 2024
Date last revised:
Exhibit 12
Page 3
EXHIBIT 12-1
GEOTECHNICAL REPORT
Colorado Sand Company II, LLC - Kersey Mine
Use By Special Review Permit Application Package
Date prepared: October 14, 2024
Date last revised:
CTLITHOMPSON
Founded in 1971
GEOTECHNICAL INVESTIGATION
Kersey Sand Mine
County Road 61 and County Road 64
Kersey, Colorado
Prepared for:
TRC Companies
1526 Cole Blvd, Suite 150
Lakewood, Colorado 80401
Attention:
Grant Waldie
Project No. FC 11079.001-125
May 15, 2024
CTLIThompson, Inc.
Denver, Fort Collins, Colorado Springs, Glenwood Springs, Pueblo, Summit County — Colorado
Cheyenne, Wyoming and Bozeman, Montana
Table of Contents
Scope
S ummary Of Conclusions
S ite Conditions
Previous Investigation
Investigation
S ubsurface Conditions
Groundwater
Limitations
FIGURE 1 — LOCATIONS OF EXPLORATORY BORINGS
FIGURE 2 - SUMMARY LOGS OF EXPLORATORY BORINGS
APPENDIX A - RESULTS OF LABORATORY TESTING
S cope
This report presents the results of our Geotechnical Investigation for the proposed sand
mine in Kersey, Colorado (Figure 1). The purpose of the investigation was to explore the
subsurface conditions, and provide material information and testing results. The scope was
described in a Service Agreement (No. FC-23-0426 CM -1) dated April 22, 2024. Evaluation of the
property for the presence of potentially hazardous materials was not included in our work scope.
The report was prepared from data developed during field exploration, and field and
laboratory testing. The report includes a description of subsurface conditions found in our
exploratory borings. The report was prepared for the exclusive use of TRC Companies and your
team. Our findings are summarized in the following paragraphs.
S ummary Of Conclusions
1 Strata encountered in our borings generally consisted of clayey sands and sandy
clays over sandstone and claystone bedrock. Primarily sandstone bedrock was
encountered between approximately 8 and 24 feet and extended to the maximum
depths explored.
2. Groundwater was measured at an approximate depth of 24 feet in one boring
during drilling. Groundwater levels may fluctuate seasonally and rise in response
to precipitation, irrigation and changes in land -use.
S ite Conditions
The site is located east of Weld County Road 61 and south of Weld County Road 64 near
Kersey, Colorado. The site is generally in a plains area and is primarily vegetated with grasses
and weeds. At the time of our exploration the site was undeveloped with utilities and dirt roads.
The project site is generally hilly. No water features or rock outcrops were noted onsite. Oil
industry infrastructure and access roads were noted onsite.
P revious Investigation
CTL Thompson performed a Preliminary Geotechnical Investigation on a northern section
of the site (Project No. FC11079.000-115), dated April 5, 2024. The previous investigation was
reviewed in preparation for this report.
TRC COMPANIES
KERSEY SAND MINE
CTLI T PROJECT NO. FC11079.001-125
1
Investigation
The field investigation included drilling and sampling eight exploratory borings at the
approximate locations presented on Figure 1 as selected by the client. The borings were drilled
to depths of approximately 15 to 25 feet using 4 -inch diameter continuous -flight augers, and a
truck -mounted drill rig. Drilling was observed by our field representative who logged the soils and
bedrock and obtained samples for laboratory tests. Summary logs of the exploratory borings,
including results of field penetration resistance tests and a portion of laboratory test data, are
presented on Figure 2.
Soil and bedrock samples obtained during drilling were returned to our laboratory and
visually examined by our geotechnical engineer. Laboratory testing was assigned by the client
and included moisture content, dry density, particle -size analysis, direct shear, and Atterberg
limits. Results of the laboratory tests are presented in Appendix A and summarized in Table A -I.
Subsurface Conditions
Strata encountered in our exploratory borings generally consisted of 8 to 23 feet of clayey
sands and sandy clays. Sandstone and claystone bedrock was encountered in all borings at 8 to
24 feet to the maximum depths explored. The sand encountered was loose to very dense and
contained between 6 and 46 percent silt and clay sized particles.
Groundwater
Groundwater was encountered at a depth of 24 feet in one boring during drilling.
Groundwater may develop on or near the bedrock surface or other low permeable soil or bedrock
when a source of water not presently contributing becomes available.
Limitations
This report has been prepared for the exclusive use of TRC Companies, and the design
team for the project, to provide geotechnical information for the proposed project. within about
three years, we should be contacted to determine if we should update this report. Our borings
and laboratory testing were determined by the client. The borings are representative of conditions
encountered only at the location drilled. Subsurface variations not indicated by our borings are
TRC COMPANIES
KERSEY SAND MINE
CTLI T PROJECT NO. FC11079.001-125
2
possible. We believe this investigation was conducted with that level of skill and care ordinarily
used by geotechnical engineers practicing under similar conditions. No warranty, express or
implied, is made.
If we can be of further service in discussing the contents of this report, or in the analysis
of the influence of subsurface conditions on design of the structures or any other aspect of the
proposed construction, please call.
CTO THOMPSON, INIP
R.B. "Chip" Leadbetter, III, PE
Senior Engineer
TRC COMPANIES
KERSEY SAND MINE
CTLI T PROJECT NO. FC11079.001-125
3
LEGEND:
DEPTH - FEET
0
5
10
15
20
25
30
35
40
TH-1
1 30/12
WC=3.0
DD=108
LL=NV PI=NP
-200=18
43/12
50/9
50/12
45/12
TRC COMPANIES
KERSEY SAND MINE
CTL I T PROJECT NO. FC11079.001-125
TH-2
27/12
1 40/12
WC=7.5
DD=125
LL=24 P1=10
-200=42
A 50/5
1 50/7
TH-3
TH-4
1 14/12 z 7/12
WC=3.5
LL=NV PI=NP
-200=20
50/11
50/9
e:-
e-.
1 5/12
WC=3.0
LL=NV PI=NP
- 200=10
1 33/12
WC=4.2
DD=103
LL=NV PI=NP
- 200=14
27/12
TH-5
41/12
12/12
16/12
TH-6
21/12
1 14/12
W C=2.1
LL=NV PI=NP
-200=6
16/12
j13/12
31 /12
WC= 15.7
DD=114
LL=28 P1=14
-200=46
50/4
•
•
TH-7
r
/
29/12
10/12
1 9/12
WC=4.5
LL=NV PI=NP
-200=9
34/12
50/10
TH-8
0
5
10
15
20
25
30
35
40
DEPTH - FEET
•
•
SAND, CLAYEY, SLIGHTLY MOIST, LOOSE TO VERY DENSE, BROWN
CLAY, SANDY, SLIGHTLY MOIST, VERY STIFF, BROWN
SANDSTONE, SLIGHTLY MOIST, HARD TO VERY HARD, BROWN, RUST, WHITE
CLAYSTONE, SLIGHTLY MOIST, MEDIUM HARD TO HARD, GREY, RUST
liDRIVE SAMPLE. THE SYMBOL 30/12 INDICATES 30 BLOWS OF A 140 -POUND HAMMER
FALLING 30 INCHES WERE REQUIRED TO DRIVE A 2.5 -INCH O.D. SAMPLER 12 INCHES.
V WATER LEVEL MEASURED AT TIME OF DRILLING.
NOTES:
1. THE BORINGS WERE DRILLED ON APRIL 29TH, 2024 USING 4 -INCH DIAMETER
CONTINUOUS -FLIGHT AUGERS AND A TRUCK -MOUNTED DRILL RIG.
2. THESE LOGS ARE SUBJECT TO THE EXPLANATIONS, LIMITATIONS AND CONCLUSIONS IN
THIS REPORT.
3. WC - INDICATES MOISTURE CONTENT (%).
DD - INDICATES DRY DENSITY (PCF).
SW - INDICATES SWELL WHEN WETTED UNDER OVERBURDEN PRESSURE (%).
-200 - INDICATES PASSING NO. 200 SIEVE (1)/0).
LL - INDICATES LIQUID LIMIT.
P I - INDICATES PLASTICITY INDEX.
U C - INDICATES UNCONFINED COMPRESSIVE STRENGTH (PSF).
SS - INDICATES SOLUBLE SULFATE CONTENT (%).
Summary Logs of
Exploratory Borings
FIGURE 2
APPENDIX
RESULTS OF LABORATORY TESTING
HYDROMETER
ANALYSIS
SIEVE ANALYSIS
25 HR. 7 HR. TIME READINGS U.S. STANDARD SERIES CLEAR SQUARE OPENINGS
45 MIN. 15 MIN. 60 MIN. 19 MIN. 4 MIN. 1 MIN. *200 *100 *50 *40 *30 *16 *10 *8 *4 3/8" 3/4" 1'/1" 3" 5" 6" 8"
100 0
90
10
80
20
+
70
;
30 0
Z
Z
CT)
Q
60
40
z
,
i-
z
z
U 50
50 W
L
w
-
CC
W
40
60 D-
30
,
1�
70
20
;
;
80
I
10
90
0
,,
1
i
,
I
„ „1
1
1
i
„I
100
.001 0.002 .005 .009 .019 .037 .074 .149 .297 .590 1.19 2.0 2.38 4.76 9.52 19.1 36.1 76.2 127 200
0.42 152
DIAMETER OF PARTICLE IN MILLIMETERS
CLAY TO SILT
SANDS
GRAVEL
(PLASTIC) (NON -PLASTIC)
FINE
MEDIUM I
COARSE
FINE
COARSE
COBBLES
Sample of SAND, CLAYEY (SC)
From
TH - 1 AT 4 FEET
GRAVEL 0 % SAND
82
SILT & CLAY 18 % LIQUID LIMIT
PLASTICITY INDEX
NV %
NP %
HYDROMETER ANALYSIS I
SIEVE ANALYSIS
25
45
100
HR. 7 HR. TIME READINGS U.S. STANDARD SERIES CLEAR SQUARE OPENINGS
MIN. 15 MIN. 60 MIN. 19 MIN. 4 MIN. 1 MIN. *200 *100 *50 *40 *30 *16 *10 *8 *4 3/8" 3/4" 1°/2" 3" 5" 6" 8"0
+
90
10
,
80
20
c7 70
30 0
z
'
z
v)
+
co
Q
60
40
r
I___
i-
z
50
i-
50 w
U
CC
C)
W
i
i
CC
--
W
40
;
;-
60 a
30
;
;
70
t___
,-
20
80
10
90
0
1 f
1 ,
+
, , ,
„+
„�
+
,
, „I
, III
, ,,
100
.001 0.002 .005 .009 .019 .037 .074 .149 .297 .590 1.19 2.0 2.38 4.76 9.52 19.1 36.1 76.2 127 200
0.42 152
DIAMETER OF PARTICLE IN MILLIMETERS
SANDS
CLAY TO SILT
GRAVEL
(PLASTIC) (NON -PLASTIC)
FINE I
MEDIUM I
COARSE
FINE I
COARSE
COBBLES
Sample of SAND, CLAYEY (SC)
From TH - 2 AT 9 FEET
TRC COMPANIES
KERSEY SAND MINE
CTL T PROJECT NO. FC11079.001-125
GRAVEL
SILT & CLAY
1 % SAND
42 % LIQUID LIMIT
PLASTICITY INDEX
57
ok
24 %
10 %
Gradation
Test Results
FIGURE A-1
HYDROMETER
ANALYSIS
SIEVE ANALYSIS
25 HR. 7 HR. TIME READINGS U.S. STANDARD SERIES CLEAR SQUARE OPENINGS
45 MIN. 15 MIN. 60 MIN. 19 MIN. 4 MIN. 1 MIN. *200 *100 *50 *40 *30 *16 *10 *8 *4 3/8" 3/4" 1'/1" 3" 5" 6" 8"
100 0
i
90
,
10
80
20
i_
+
70
'
30 0
Z
'
z
CT)
Q
60
40
i-
,
i-
z
U 50
50 w
,
�
-
W
-
CC
W
40
}
60 D-
30
,
70
1�
20
;
;
80
I
10
90
0
,,
1
i
,
I
„ „1
1
1
i
„I
100
.001 0.002 .005 .009 .019 .037 .074 .149 .297 .590 1.19 2.0 2.38 4.76 9.52 19.1 36.1 76.2 127 200
0.42 152
DIAMETER OF PARTICLE IN MILLIMETERS
CLAY TO SILT
SANDS
GRAVEL
(PLASTIC) (NON -PLASTIC)
FINE
MEDIUM I
COARSE
FINE
COARSE
COBBLES
Sample of SAND, CLAYEY (SC)
From
TH -3AT4 FEET
GRAVEL 0 % SAND
80 %
SILT & CLAY 20 % LIQUID LIMIT
PLASTICITY INDEX
NV %
NP %
HYDROMETER ANALYSIS I
SIEVE ANALYSIS
25
45
100
HR. 7 HR. TIME READINGS U.S. STANDARD SERIES CLEAR SQUARE OPENINGS
MIN. 15 MIN. 60 MIN. 19 MIN. 4 MIN. 1 MIN. *200 *100 *50 *40 *30 *16 *10 *8 *4 3/8" 3/4" 1°/2" 3" 5" 6" 8"0
f
T
90
10
80
20
c7 70
30 0
z
z
v)
+
co
Q
60
r
i
40
r
I__
i-
z
50
i-
50 w
U
CC
C)
W
+
i
CC
W
40
;-
60 a
,
30
;
;
70
,-
t-
20
80
10
90
0
1 f
1 ,
+
I I
, , ,
„+
„�
+
,
, „I
, III
, ,,
100
.001 0.002 .005 .009 .019 .037 .074 .149 .297 .590 1.19 2.0 2.38 4.76 9.52 19.1 36.1 76.2 127 200
0.42 152
DIAMETER OF PARTICLE IN MILLIMETERS
SANDS
CLAY TO SILT
GRAVEL
(PLASTIC) (NON -PLASTIC)
FINE I
MEDIUM I
COARSE
FINE I
COARSE
COBBLES
Sample of SAND, SLIGHTLY CLAYEY (SP -SC)
From TH - 4 AT 9 FEET
TRC COMPANIES
KERSEY SAND MINE
CTL T PROJECT NO. FC11079.001-125
GRAVEL
SILT & CLAY
0 % SAND
10 % LIQUID LIMIT
PLASTICITY INDEX
90 %
NV %
NP %
Gradation
Test Results
FIGURE A-2
HYDROMETER
ANALYSIS
SIEVE ANALYSIS
25 HR. 7 HR. TIME READINGS U.S. STANDARD SERIES CLEAR SQUARE OPENINGS
45 MIN. 15 MIN. 60 MIN. 19 MIN. 4 MIN. 1 MIN. *200 *100 *50 *40 *30 *16 *10 *8 *4 3/8" 3/4" 1'/1" 3" 5" 6" 8"
100 0
i--
90
10
,
i_
80
;-
20
i_
I-
0 70
;
;
30 0
Z
z
CT)_
—c
U)
I
60
40
i
i-
i-
z
U 50
50 w
,
-
W
-
n-
CC
W
40
,
60 D-
30
,
70
1�
I
20
;
;
80
I
I-
10
i_
90
i-
n-
0
, ,
1
i
,
„'
„ „1
1
1
i
„I
100
.001 0.002 .005 .009 .019 .037 .074 .149 .297 .590 1.19 2.0 2.38 4.76 9.52 19.1 36.1 76.2 127 200
0.42 152
DIAMETER OF PARTICLE IN MILLIMETERS
CLAY TO SILT
SANDS
GRAVEL
(PLASTIC) (NON -PLASTIC)
FINE
MEDIUM I
COARSE
FINE
COARSE
COBBLES
Sample of SAND, CLAYEY (SC)
From
TH - 4 AT 14 FEET
GRAVEL 0 % SAND
86
SILT & CLAY 14 % LIQUID LIMIT
PLASTICITY INDEX
NV %
NP %
HYDROMETER ANALYSIS I
SIEVE ANALYSIS
25
45
100
HR. 7 HR. TIME READINGS U.S. STANDARD SERIES CLEAR SQUARE OPENINGS
MIN. 15 MIN. 60 MIN. 19 MIN. 4 MIN. 1 MIN. *200 *100 *50 *40 *30 *16 *10 *8 *4 3/8" 3/4" 1°/2" 3" 5" 6" 8"0
E
�
90
10
80
;
20
c7 70
30 0
z
,
z
v)
co
Q
60
r
i
40
r
I__
i-
z
,-
_
50
I
50 w
U
CC
C)
W
i
i
CC
--
W
40
;
;-
60 a
30
;
;
70
t___
t-
20
80
10
90
0
1 f
1 i
i
, , ,
„I
,
, „
I
, III
, , ,
100
.001 0.002 .005 .009 .019 .037 .074 .149 .297 .590 1.19 2.0 2.38 4.76 9.52 19.1 36.1 76.2 127 200
0.42 152
DIAMETER OF PARTICLE IN MILLIMETERS
SANDS
CLAY TO SILT
GRAVEL
(PLASTIC) (NON -PLASTIC)
FINE I
MEDIUM I
COARSE
FINE I
COARSE
COBBLES
Sample of SAND, CLAYEY (SC)
From TH - 5 AT 19 FEET
TRC COMPANIES
KERSEY SAND MINE
CTL T PROJECT NO. FC11079.001-125
GRAVEL
SILT & CLAY
0 % SAND
46 % LIQUID LIMIT
PLASTICITY INDEX
54 %
28 %
14 %
Gradation
Test Results
FIGURE A-3
HYDROMETER
ANALYSIS
SIEVE ANALYSIS
25 HR. 7 HR. TIME READINGS U.S. STANDARD SERIES CLEAR SQUARE OPENINGS
45 MIN. 15 MIN. 60 MIN. 19 MIN. 4 MIN. 1 MIN. *200 *100 *50 *40 *30 *16 *10 *8 *4 3/8" 3/4" 1'/1" 3" 5" 6" 8"
100 0
-
i--
90
10
i_
80
;-
20
i_
I-
0 70
i--30
0
Z
,-.
Z
Q
U
'
I-
60
40
i
,
i-
i-
z
U 50
50 w
,
-
W
-
n-
CC
W
40
60 D-
30
,
70
1�
I
20
;
;
80
I-
10
i_
90
i-
n-
0
,,
1
i
,
'
„ 1
1
1
i
I
100
.001 0.002 .005 .009 .019 .037 .074 .149 .297 .590 1.19 2.0 2.38 4.76 9.52 19.1 36.1 76.2 127 200
0.42 152
DIAMETER OF PARTICLE IN MILLIMETERS
CLAY TO SILT
SANDS
GRAVEL
(PLASTIC) (NON -PLASTIC)
FINE
MEDIUM I
COARSE
FINE
COARSE
COBBLES
Sample Of SAND, SLIGHTLY CLAYEY (SP -SC)
From
TH - 6 AT 9 FEET
GRAVEL 0 % SAND
94 %
SILT & CLAY 6 % LIQUID LIMIT
PLASTICITY INDEX
NV %
NP %
HYDROMETER ANALYSIS I
SIEVE ANALYSIS
25
45
100
HR. 7 HR. TIME READINGS U.S. STANDARD SERIES CLEAR SQUARE OPENINGS
MIN. 15 MIN. 60 MIN. 19 MIN. 4 MIN. 1 MIN. *200 *100 *50 *40 *30 *16 *10 *8 *4 3/8" 3/4" 1°/2" 3" 5" 6" 8"0
E
r
i
T
90
10
80
;
20
c7 70
30 0
z
z
v)
co
Q
60
r
i
40
r
I__
i-
z
50
i-
50 w
U
CC
C)
W
i
i
CC
--
W
40
;
;-
60 a
30
;
;
70
T-
t-
20
80
10
90
0
1 f
1 ,
i
, , ,
, , ,
,
,
I
, III
, , ,
100
.001 0.002 .005 .009 .019 .037 .074 .149 .297 .590 1.19 2.0 2.38 4.76 9.52 19.1 36.1 76.2 127 200
0.42 152
DIAMETER OF PARTICLE IN MILLIMETERS
SANDS
CLAY TO SILT
I
GRAVEL
(PLASTIC) (NON -PLASTIC)
FINE I
MEDIUM I
COARSE
FINE I
COARSE
COBBLES
Sample of SAND, SLIGHTLY CLAYEY (SP -SC)
From TH - 7 AT 14 FEET
TRC COMPANIES
KERSEY SAND MINE
CTL T PROJECT NO. FC11079.001-125
GRAVEL
SILT & CLAY
0 % SAND
9 % LIQUID LIMIT
PLASTICITY INDEX
91 %
NV %
NP %
Gradation
Test Results
FIGURE A-4
INTERNATIONAL
_
Shear
Strength
(Small
Shear
by
Direct
Box)
Shear
__
Client
TRC
Companies
Lab
Ref
Project
Sand
Mine
Job
FC 11079.001
Kersey
Borehole
Sample
3.5'-5'
TH-1
Test Summary
Reference
A
B
C
Normal
Stress
6.94
psi
13.89
psi
20.83
psi
Peak
Strength
3.72
psi
9.18
psi
11.78
psi
Residual
Stress
N/A
N/A
N/A
Rate
Displacement
of
Shear
Stage
0.029000in/min
1:
Stage
0.029000in/min
1:
Stage
0.029000in/min
1:
Final
Height
0.9856 in
0.9887 in
0.9743 in
Sample
Area
4.90873 in2
4.90873
in2
4.90873 in2
Maximum
Peak
12,877-
12.00
11.0D;
1000_
Shear
9.0D—
, �C�
7.CO
6.00
5,00
4.00
3'.00
1.0D
-
Shear
Stress,
Stress
psi
vs
Normal
Stress
-
1
�,
Peak #
_
_
*
Angle of Shear
Resistor
-led
-
3_e=
-
30.13
•
Deg re -es
Cohesion
_
;
;0.17
_
A,.
_
_
-
-
-
- ..,-----
_.---
_,
-
r= _
-1
0.0D
�Sr'l-'
1
1 4�4
1 I �
40 6 i
D� �
4 �'
!
°: �_:+: 2,
Y� 1
DO
_F o "1 6 i _ii
,4t• :i�:+•
14,
1 .-
E.
i 0 �1 '�
DD L1r�•4 21.87
Normal! Stress pry i
ELE
International
Page 1 of 1
FIGURE A-5
INTERNATIONAL
_
Shear
Strength
(Small
Shear
by
Direct
Box)
Shear
-
__
Client
TRC
Companies
Lab
Ref
Project
Sand
Mine
Job
FC 11079.001
Kersey
Borehole
Sample
8.5'-10'
TH-4
Test Summary
Reference
A
B
C
Normal
Stress
6.94
psi
13.89
psi
20.83
psi
Peak
Strength
4.00
psi
6.97
psi
11.65
psi
Residual
Stress
N/A
N/A
N/A
Rate
Displacement
of
Shear
Stage
0.029000in/min
1:
Stage
0.029000in/min
1:
Stage
0.029000in/min
1:
Final
Height
0.9835 in
0.9770 in
0.9802 in
Sample
Area
4.90873
in2
4.90873
in2
4.90873 in2
Maximum
Peak
1(2124.-
11.00
10.00
Shear
9,0D
,00
9.00
7.00
610.0
5.0D
4,00
3, CO
fJY,�,-
LIYL
110D
Shear Stress vs Normal Stream
Stress psi
;
-..
_- g-
Peak #
_
-
Angle of Shear
Resistance
_
,I r ) I �3
28.8
D F.29ree_r
_
is
_
Cohesion
-0.10
j
p:i
---
_•
-
_
;
__
__
_
;
• -
.
�=
_
e
=
_
J
0, 0._I 2 ,
s_.•
0CN 4.:=:IY_I 6. ,_I._it _i, ,_1Y_I " I.I.1_I,_I 12 , ,_t:_I 14, CC 16. ,_I._I 1 81CO�� O � �1 Y_IY_I 21.87
Normal Stress psi
ELE
International
Page 1 of 1
FIGURE A-6
INTERNATIONAL
_
Shear
Strength
(Small
Shear
by
Direct
Box)
Shear
__
Client
TRC
Companies
Lab
Ref
Project
Sand
Mine
Job
FC 11079.001
Kersey
Borehole
Sample
13.5'-15'
TH-7
Test Summary
Reference
A
B
C
Normal
Stress
6.94
psi
13.89
psi
20.83
psi
Peak
Strength
3.15
psi
7.80
psi
12.59
psi
Residual
Stress
N/A
N/A
N/A
Rate
Displacement
of
Shear
Stage
0.029000in/min
1:
Stage
0.029000in/min
1:
Stage
0.029000in/min
1:
Final
Height
0.9852 in
0.9724
in
0.9872 in
Sample
Area
4.90873 in2
4.90873
in2
4.90873 in2
Maximum
Peak
13,3Ci
12,00
10,C,ID
Shear
8.0D
6.0D
4.00
L� OD
OW
1rd_,
-��_
Shear Stress vs Normal Stream
Stress psi
87
_
1
- -
-
s -o
Peak •
=e
Angle of Shear
Resistance
—
1
_
34,20
D F.2g reel
Cohesion
e4'
_
—1.59' yp_i
-
-
-
l
T
_
_
_/'
iti a
-
,
s.
_
Cor• -
c i 0 d I o
nr* inn. r*,� r, 010 r -
10 0 4. � i �_ V 6 0 � _'�I - 0 9 � � _.b 1 7. i_ = �_ �7 1� 01 _.n 1
- -
6' � .I _�V 1 8. _) 0 L �_ tl. 00i 21 .
Normal Stress psi
ELE
International
Page 1 of 1
FIGURE A-7
TABLE A -I
SUMMARY OF LABORATORY TESTING
LOT
BLOCK
DEPTH
(FEET)
MOISTURE
CONTENT
(%)
DENSITY
(PCF)
DRY
ATTERBERG
LIMITS
PASSING
NO.
SIEVE
200
(%)
DESCRIPTION
LIQUID
LIMIT
PLASTICITY
INDEX
TH
1
4
3.0
108
NV
NP
18
SAND,
CLAYEY
(SC)
TH
2
9
7.5
125
24
10
42
SAND,
CLAYEY
(SC)
TH
3
4
3.5
NV
NP
20
SAND,
CLAYEY
(SC)
TH
4
9
3.0
NV
NP
10
SAND,
SLIGHTLY
CLAYEY
(SP
-SC)
TH
4
14
4.2
103
NV
NP
14
SAND,
CLAYEY
(SC)
TH
5
19
15.7
114
28
14
46
SAND,
CLAYEY
(SC)
TH
6
9
2.1
NV
NP
6
SAND,
SLIGHTLY
CLAYEY
(SP
-SC)
TH
7
14
4.5
NV
NP
9
SAND,
SLIGHTLY
CLAYEY
(SP
-SC)
* NEGATIVE VALUE INDICATES COMPRESSION.
TRC COMPANIES
KERSEY SAND MINE
CTLIT PROJECT NO. FC11079.001-125
Page 1 of 1
Exhibit 12
Page 4
EXHIBIT 12-2
USDA NRCS SOIL SURVEY
Colorado Sand Company II, LLC - Kersey Mine
Use By Special Review Permit Application Package
Date prepared: October 14, 2024
Date last revised:
USDA United States
Department of
Agriculture
ACS
Natural
Resources
Conservation
Service
A product of the National
Cooperative Soil Survey,
a joint effort of the United
States Department of
Agriculture and other
Federal agencies, State
agencies including the
Agricultural Experiment
Stations, and local
participants
Custom Soil Resource
Report for
Weld County,
Colorado,
Southern Part
Project W Soils Report
October 11, 2023
Preface
Soil surveys contain information that affects land use planning in survey areas.
They highlight soil limitations that affect various land uses and provide information
about the properties of the soils in the survey areas. Soil surveys are designed for
many different users, including farmers, ranchers, foresters, agronomists, urban
planners, community officials, engineers, developers, builders, and home buyers.
Also, conservationists, teachers, students, and specialists in recreation, waste
disposal, and pollution control can use the surveys to help them understand,
protect, or enhance the environment.
Various land use regulations of Federal, State, and local governments may impose
special restrictions on land use or land treatment. Soil surveys identify soil
properties that are used in making various land use or land treatment decisions.
The information is intended to help the land users identify and reduce the effects of
soil limitations on various land uses. The landowner or user is responsible for
identifying and complying with existing laws and regulations.
Although soil survey information can be used for general farm, local, and wider area
planning, onsite investigation is needed to supplement this information in some
cases. Examples include soil quality assessments (http://www.nres.usda.gov/wps/
portal/nres/main/soils/health/) and certain conservation and engineering
applications. For more detailed information, contact your local USDA Service Center
(https://offices.sc.egov.usda.gov/locator/app?agency=nres) or your NRCS State Soil
Scientist (http://www.nres.usda.gov/wps/portal/nres/detail/soils/contactus/?
cid=nres 142p2_053951).
Great differences in soil properties can occur within short distances. Some soils are
seasonally wet or subject to flooding. Some are too unstable to be used as a
foundation for buildings or roads. Clayey or wet soils are poorly suited to use as
septic tank absorption fields. A high water table makes a soil poorly suited to
basements or underground installations.
The National Cooperative Soil Survey is a joint effort of the United States
Department of Agriculture and other Federal agencies, State agencies including the
Agricultural Experiment Stations, and local agencies. The Natural Resources
Conservation Service (MRCS) has leadership for the Federal part of the National
Cooperative Soil Survey.
Information about soils is updated periodically. Updated information is available
through the NRCS Web Soil Survey, the site for official soil survey information.
The U.S. Department of Agriculture (USDA) prohibits discrimination in all its
programs and activities on the basis of race, color, national origin, age, disability,
and where applicable, sex, marital status, familial status, parental status, religion,
sexual orientation, genetic information, political beliefs, reprisal, or because all or a
part of an individual's income is derived from any public assistance program. (Not
all prohibited bases apply to all programs.) Persons with disabilities who require
2
alternative means for communication of program information (Braille, large print,
audiotape, etc.) should contact USDA's TARGET Center at (202) 720-2600 (voice
and TDD). To file a complaint of discrimination, write to USDA, Director, Office of
Civil Rights, 1400 Independence Avenue, S.W., Washington, D.C. 20250-9410 or
call (800) 795-3272 (voice) or (202) 720-6382 (TDD). USDA is an equal opportunity
provider and employer.
3
Contents
Preface 2
How Soil Surveys Are Made 5
Soil Map 8
Soil Map 9
Legend 10
Map Unit Legend 11
Map Unit Descriptions 11
Weld County, Colorado, Southern Part 13
69 Valent sand, 0 to 3 percent slopes 13
70 Valent sand, 3 to 9 percent slopes 14
72 Vona loamy sand, 0 to 3 percent slopes 16
References 18
4
How Soil Surveys Are Made
Soil surveys are made to provide information about the soils and miscellaneous
areas in a specific area. They include a description of the soils and miscellaneous
areas and their location on the landscape and tables that show soil properties and
limitations affecting various uses. Soil scientists observed the steepness, length,
and shape of the slopes; the general pattern of drainage; the kinds of crops and
native plants; and the kinds of bedrock. They observed and described many soil
profiles. A soil profile is the sequence of natural layers, or horizons, in a soil. The
profile extends from the surface down into the unconsolidated material in which the
soil formed or from the surface down to bedrock. The unconsolidated material is
devoid of roots and other living organisms and has not been changed by other
biological activity.
Currently, soils are mapped according to the boundaries of major land resource
areas (MLRAs). MLRAs are geographically associated land resource units that
share common characteristics related to physiography, geology, climate, water
resources, soils, biological resources, and land uses (USDA, 2006). Soil survey
areas typically consist of parts of one or more MLRA.
The soils and miscellaneous areas in a survey area occur in an orderly pattern that
is related to the geology, landforms, relief, climate, and natural vegetation of the
area. Each kind of soil and miscellaneous area is associated with a particular kind
of landform or with a segment of the landform. By observing the soils and
miscellaneous areas in the survey area and relating their position to specific
segments of the landform, a soil scientist develops a concept, or model, of how they
were formed. Thus, during mapping, this model enables the soil scientist to predict
with a considerable degree of accuracy the kind of soil or miscellaneous area at a
specific location on the landscape.
Commonly, individual soils on the landscape merge into one another as their
characteristics gradually change. To construct an accurate soil map, however, soil
scientists must determine the boundaries between the soils. They can observe only
a limited number of soil profiles. Nevertheless, these observations, supplemented
by an understanding of the soil -vegetation -landscape relationship, are sufficient to
verify predictions of the kinds of soil in an area and to determine the boundaries.
Soil scientists recorded the characteristics of the soil profiles that they studied. They
noted soil color, texture, size and shape of soil aggregates, kind and amount of rock
fragments, distribution of plant roots, reaction, and other features that enable them
to identify soils. After describing the soils in the survey area and determining their
properties, the soil scientists assigned the soils to taxonomic classes (units).
Taxonomic classes are concepts. Each taxonomic class has a set of soil
characteristics with precisely defined limits. The classes are used as a basis for
comparison to classify soils systematically. Soil taxonomy, the system of taxonomic
classification used in the United States, is based mainly on the kind and character
of soil properties and the arrangement of horizons within the profile. After the soil
5
Custom Soil Resource Report
scientists classified and named the soils in the survey area, they compared the
individual soils with similar soils in the same taxonomic class in other areas so that
they could confirm data and assemble additional data based on experience and
research.
The objective of soil mapping is not to delineate pure map unit components; the
objective is to separate the landscape into landforms or landform segments that
have similar use and management requirements. Each map unit is defined by a
unique combination of soil components and/or miscellaneous areas in predictable
proportions. Some components may be highly contrasting to the other components
of the map unit. The presence of minor components in a map unit in no way
diminishes the usefulness or accuracy of the data. The delineation of such
landforms and landform segments on the map provides sufficient information for the
development of resource plans. If intensive use of small areas is planned, onsite
investigation is needed to define and locate the soils and miscellaneous areas.
Soil scientists make many field observations in the process of producing a soil map.
The frequency of observation is dependent upon several factors, including scale of
mapping, intensity of mapping, design of map units, complexity of the landscape,
and experience of the soil scientist. Observations are made to test and refine the
soil -landscape model and predictions and to verify the classification of the soils at
specific locations. Once the soil -landscape model is refined, a significantly smaller
number of measurements of individual soil properties are made and recorded.
These measurements may include field measurements, such as those for color,
depth to bedrock, and texture, and laboratory measurements, such as those for
content of sand, silt, clay, salt, and other components. Properties of each soil
typically vary from one point to another across the landscape.
Observations for map unit components are aggregated to develop ranges of
characteristics for the components. The aggregated values are presented. Direct
measurements do not exist for every property presented for every map unit
component. Values for some properties are estimated from combinations of other
properties.
While a soil survey is in progress, samples of some of the soils in the area generally
are collected for laboratory analyses and for engineering tests. Soil scientists
interpret the data from these analyses and tests as well as the field -observed
characteristics and the soil properties to determine the expected behavior of the
soils under different uses. Interpretations for all of the soils are field tested through
observation of the soils in different uses and under different levels of management.
Some interpretations are modified to fit local conditions, and some new
interpretations are developed to meet local needs. Data are assembled from other
sources, such as research information, production records, and field experience of
specialists. For example, data on crop yields under defined levels of management
are assembled from farm records and from field or plot experiments on the same
kinds of soil.
Predictions about soil behavior are based not only on soil properties but also on
such variables as climate and biological activity. Soil conditions are predictable over
long periods of time, but they are not predictable from year to year. For example,
soil scientists can predict with a fairly high degree of accuracy that a given soil will
have a high water table within certain depths in most years, but they cannot predict
that a high water table will always be at a specific level in the soil on a specific date.
After soil scientists located and identified the significant natural bodies of soil in the
survey area, they drew the boundaries of these bodies on aerial photographs and
6
Custom Soil Resource Report
identified each as a specific map unit. Aerial photographs show trees, buildings,
fields, roads, and rivers, all of which help in locating boundaries accurately.
Soil Map
The soil map section includes the soil map for the defined area of interest, a list of
soil map units on the map and extent of each map unit, and cartographic symbols
displayed on the map. Also presented are various metadata about data used to
produce the map, and a description of each soil map unit.
8
Meters
0 450 900 1800 2700
Feet
0 1500 3000 6000 9000
Map projection: Web Mercator Corner coordinates: WGS84 Edge tics: UTM Zone 13N WGS84
9
Custom Soil Resource Report
MAP LEGEND
Area of Interest (AO!)
Area of Interest (AO1)
Soils
Soil Map Unit Polygons
Soil Map Unit Lines
Soil Map Unit Points
Special Point Features
Blowout
r, _
O
O
v
Borrow Pit
Clay Spot
Closed Depression
Gravel Pit
Gravelly Spot
Landfill
Lava Flow
Marsh or swamp
Mine or Quarry
Miscellaneous Water
Perennial Water
Rock Outcrop
Saline Spot
Sandy Spot
Severely Eroded Spot
Sinkhole
Slide or Slip
Sodic Spot
Spoil Area
Stony Spot
Very Stony Spot
Wet Spot
Other
Special Line Features
Water Features
Streams and Canals
Transportation
Rails
Interstate Highways
US Routes
Major Roads
Local Roads
Background
iair°§1 Aerial Photography
MAP INFORMATION
The soil surveys that comprise your AOI were mapped at
1:24,000.
Please rely on the bar scale on each map sheet for map
measurements.
Source of Map: Natural Resources Conservation Service
Web Soil Survey URL:
Coordinate System: Web Mercator (EPSG:3857)
Maps from the Web Soil Survey are based on the Web Mercator
projection, which preserves direction and shape but distorts
distance and area. A projection that preserves area, such as the
Albers equal-area conic projection, should be used if more
accurate calculations of distance or area are required.
This product is generated from the USDA -MRCS certified data as
of the version date(s) listed below.
Soil Survey Area: Weld County, Colorado, Southern Part
Survey Area Data: Version 22, Aug 24, 2023
Soil map units are labeled (as space allows) for map scales
1:50,000 or larger.
Date(s) aerial images were photographed: Jun 8, 2021 Jun 12,
2021
The orthophoto or other base map on which the soil lines were
compiled and digitized probably differs from the background
imagery displayed on these maps. As a result, some minor
shifting of map unit boundaries may be evident.
10
Custom Soil Resource Report
Map Unit Legend
Map
Unit Symbol
Map Unit Name
Acres in AOI
Percent of AOI
69
Valent
slopes
sand, 0 to 3
percent
1,404.5
34.9%
70
Valent
slopes
sand, 3 to 9
percent
2,560.8
63.7%
72
Vona
loamy sand,
percent slopes
0 to 3
57.6
1.4%
Totals for Area of Interest
4,023.0
100.0°/0
Map Unit Descriptions
The map units delineated on the detailed soil maps in a soil survey represent the
soils or miscellaneous areas in the survey area. The map unit descriptions, along
with the maps, can be used to determine the composition and properties of a unit.
A map unit delineation on a soil map represents an area dominated by one or more
major kinds of soil or miscellaneous areas. A map unit is identified and named
according to the taxonomic classification of the dominant soils. Within a taxonomic
class there are precisely defined limits for the properties of the soils. On the
landscape, however, the soils are natural phenomena, and they have the
characteristic variability of all natural phenomena. Thus, the range of some
observed properties may extend beyond the limits defined for a taxonomic class.
Areas of soils of a single taxonomic class rarely, if ever, can be mapped without
including areas of other taxonomic classes. Consequently, every map unit is made
up of the soils or miscellaneous areas for which it is named and some minor
components that belong to taxonomic classes other than those of the major soils.
Most minor soils have properties similar to those of the dominant soil or soils in the
map unit, and thus they do not affect use and management. These are called
noncontrasting, or similar, components. They may or may not be mentioned in a
particular map unit description. Other minor components, however, have properties
and behavioral characteristics divergent enough to affect use or to require different
management. These are called contrasting, or dissimilar, components. They
generally are in small areas and could not be mapped separately because of the
scale used. Some small areas of strongly contrasting soils or miscellaneous areas
are identified by a special symbol on the maps. If included in the database for a
given area, the contrasting minor components are identified in the map unit
descriptions along with some characteristics of each. A few areas of minor
components may not have been observed, and consequently they are not
mentioned in the descriptions, especially where the pattern was so complex that it
was impractical to make enough observations to identify all the soils and
miscellaneous areas on the landscape.
The presence of minor components in a map unit in no way diminishes the
usefulness or accuracy of the data. The objective of mapping is not to delineate
pure taxonomic classes but rather to separate the landscape into landforms or
11
Custom Soil Resource Report
landform segments that have similar use and management requirements. The
delineation of such segments on the map provides sufficient information for the
development of resource plans. If intensive use of small areas is planned, however,
onsite investigation is needed to define and locate the soils and miscellaneous
areas.
An identifying symbol precedes the map unit name in the map unit descriptions.
Each description includes general facts about the unit and gives important soil
properties and qualities.
Soils that have profiles that are almost alike make up a soil series. Except for
differences in texture of the surface layer, all the soils of a series have major
horizons that are similar in composition, thickness, and arrangement.
Soils of one series can differ in texture of the surface layer, slope, stoniness,
salinity, degree of erosion, and other characteristics that affect their use. On the
basis of such differences, a soil series is divided into soil phases. Most of the areas
shown on the detailed soil maps are phases of soil series. The name of a soil phase
commonly indicates a feature that affects use or management. For example, Alpha
silt loam, 0 to 2 percent slopes, is a phase of the Alpha series.
Some map units are made up of two or more major soils or miscellaneous areas.
These map units are complexes, associations, or undifferentiated groups.
A complex consists of two or more soils or miscellaneous areas in such an intricate
pattern or in such small areas that they cannot be shown separately on the maps.
The pattern and proportion of the soils or miscellaneous areas are somewhat similar
in all areas. Alpha -Beta complex, 0 to 6 percent slopes, is an example.
An association is made up of two or more geographically associated soils or
miscellaneous areas that are shown as one unit on the maps. Because of present
or anticipated uses of the map units in the survey area, it was not considered
practical or necessary to map the soils or miscellaneous areas separately. The
pattern and relative proportion of the soils or miscellaneous areas are somewhat
similar. Alpha -Beta association, 0 to 2 percent slopes, is an example.
An undifferentiated group is made up of two or more soils or miscellaneous areas
that could be mapped individually but are mapped as one unit because similar
interpretations can be made for use and management. The pattern and proportion
of the soils or miscellaneous areas in a mapped area are not uniform. An area can
be made up of only one of the major soils or miscellaneous areas, or it can be made
up of all of them. Alpha and Beta soils, 0 to 2 percent slopes, is an example.
Some surveys include miscellaneous areas. Such areas have little or no soil
material and support little or no vegetation. Rock outcrop is an example.
12
Custom Soil Resource Report
Weld County, Colorado, Southern Part
69 Valent sand, 0 to 3 percent slopes
Map Unit Setting
National map unit symbol: 2tczd
Elevation: 3,000 to 5,210 feet
Mean annual precipitation: 13 to 20 inches
Mean annual air temperature: 48 to 52 degrees F
Frost -free period: 130 to 166 days
Farmland classification: Farmland of local importance
Map Unit Composition
Valent and similar soils: 85 percent
Minor components: 15 percent
Estimates are based on observations, descriptions, and transects of the mapunit.
Description of Valent
Setting
Landform: Interdunes
Landform position (two-dimensional): Footslope, toeslope
Landform position (three-dimensional): Base slope
Down -slope shape: Linear
Across -slope shape: Linear
Parent material: Noncalcareous eolian sands
Typical profile
A - 0 to 5 inches: sand
AC - 5 to 12 inches: sand
CI - 12 to 30 inches: sand
C2 - 30 to 80 inches: sand
Properties and qualities
Slope: 0 to 3 percent
Depth to restrictive feature: More than 80 inches
Drainage class: Excessively drained
Runoff class: Negligible
Capacity of the most limiting layer to transmit water (Ksat): High to very high (6.00
to 39.96 in/hr)
Depth to water table: More than 80 inches
Frequency of flooding: None
Frequency of ponding: None
Calcium carbonate, maximum content: 1 percent
Maximum salinity: Nonsaline (0.1 to 1.9 mmhos/cm)
Available water supply, 0 to 60 inches: Very low (about 2.4 inches)
Interpretive groups
Land capability classification (irrigated): 4e
Land capability classification (nonirrigated): 6e
Hydrologic Soil Group: A
Ecological site: R072XA021 KS - Sands (North) (PE 16-20), R067BY015CO -
Deep Sand
Hydric soil rating: No
13
Custom Soil Resource Report
Minor Components
Dailey
Percent of map unit: 5 percent
Landform: I nterd unes
Landform position (two-dimensional): Toeslope
Landform position (three-dimensional): Base slope
Down -slope shape: Linear
Across -slope shape: Concave
Ecological site: R072XA022KS - Sandy (North) Draft (April 2010) (PE 16-20),
R067BY015CO - Deep Sand
Hydric soil rating: No
Julesburg
Percent of map unit: 5 percent
Landform: I nterd unes
Landform position (two-dimensional): Toeslope
Landform position (three-dimensional): Base slope
Down -slope shape: Linear
Across -slope shape: Linear
Ecological site: R067BY024CO - Sandy Plains, R072XA022KS - Sandy (North)
Draft (April 2010) (PE 16-20)
Hydric soil rating: No
Vona
Percent of map unit: 5 percent
Landform: I nterd unes
Landform position (two-dimensional): Toeslope
Landform position (three-dimensional): Base slope
Down -slope shape: Linear
Across -slope shape: Linear
Ecological site: R067BY024CO - Sandy Plains, R072XA022KS - Sandy (North)
Draft (April 2010) (PE 16-20)
Hydric soil rating: No
74—Valent sand, 3 to 9 percent slopes
Map Unit Setting
National map unit symbol: 2tczf
Elevation: 3,050 to 5,150 feet
Mean annual precipitation: 12 to 18 inches
Mean annual air temperature: 48 to 55 degrees F
Frost -free period: 130 to 180 days
Farmland classification: Not prime farmland
Map Unit Composition
Valent and similar soils: 80 percent
Minor components: 20 percent
Estimates are based on observations, descriptions, and transects of the mapunit.
Custom Soil Resource Report
Description of Valent
Setting
Landform: Dunes, hills
Landform position (two-dimensional): Summit, shoulder, backslope, footslope
Landform position (three-dimensional): Side slope, crest, head slope, nose slope
Down -slope shape: Convex, linear
Across -slope shape: Convex, linear
Parent material: Noncalcareous eolian sands
Typical profile
A - 0 to 5 inches: sand
AC - 5 to 12 inches: sand
CI - 12 to 30 inches: sand
C2 - 30 to 80 inches: sand
Properties and qualities
Slope: 3 to 9 percent
Depth to restrictive feature: More than 80 inches
Drainage class: Excessively drained
Runoff class: Very low
Capacity of the most limiting layer to transmit water (Ksat): High to very high (6.00
to 39.96 in/hr)
Depth to water table: More than 80 inches
Frequency of flooding: None
Frequency of ponding: None
Calcium carbonate, maximum content: 1 percent
Maximum salinity: Nonsaline (0.0 to 1.9 mmhos/cm)
Available water supply, 0 to 60 inches: Very low (about 2.4 inches)
Interpretive groups
Land capability classification (irrigated): 4e
Land capability classification (nonirrigated): 6e
Hydrologic Soil Group: A
Ecological site: R067BY015CO - Deep Sand, R072XY109KS - Rolling Sands
Hydric soil rating: No
Minor Components
Dailey
Percent of map unit: 10 percent
Landform: I nterd unes
Landform position (two-dimensional): Footslope, toeslope
Landform position (three-dimensional): Base slope
Down -slope shape: Linear
Across -slope shape: Concave
Ecological site: R067BY015CO - Deep Sand, R072XA021 KS - Sands (North) (PE
16-20)
Hydric soil rating: No
Vona
Percent of map unit: 5 percent
Landform: Hills
Landform position (two-dimensional): Shoulder, backslope, footslope
Landform position (three-dimensional): Head slope, nose slope, side slope, base
slope
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Custom Soil Resource Report
Down -slope shape: Linear
Across -slope shape: Linear
Ecological site: R067BY024CO - Sandy Plains, R072XA022KS - Sandy (North)
Draft (April 2010) (PE 16-20)
Hydric soil rating: No
Haxtu n
Percent of map unit: 5 percent
Landform: I nterd unes
Landform position (two-dimensional): Footslope, toeslope
Landform position (three-dimensional): Base slope
Down -slope shape: Linear
Across -slope shape: Concave
Ecological site: R072XY111 KS - Sandy Plains, R067BY024CO - Sandy Plains
Hydric soil rating: No
72 Vona loamy sand, o to 3 percent slopes
Map Unit Setting
National map unit symbol: 363r
Elevation: 4,600 to 5,200 feet
Mean annual precipitation: 13 to 15 inches
Mean annual air temperature: 48 to 55 degrees F
Frost -free period: 130 to 160 days
Farmland classification: Farmland of local importance
Map Unit Composition
Vona and similar soils: 85 percent
Minor components: 15 percent
Estimates are based on observations, descriptions, and transects of the mapunit.
Description of Vona
Setting
Landform: Terraces, plains
Down -slope shape: Linear
Across -slope shape: Linear
Parent material: Alluvium and/or eolian deposits
Typical profile
H? - D to 6 inches: loamy sand
H2 - 6 to 28 inches: fine sandy loam
H3 - 28 to 60 inches: sandy loam
Properties and qualities
Slope: 0 to 3 percent
Depth to restrictive feature: More than 80 inches
Drainage class: Well drained
Runoff class: Very low
Capacity of the most limiting layer to transmit water (Ksat): High (1.98 to 6.00
in/hr)
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Custom Soil Resource Report
Depth to water table: More than 80 inches
Frequency of flooding: None
Frequency of ponding: None
Calcium carbonate, maximum content: 15 percent
Maximum salinity: Nonsaline to slightly saline (0.0 to 4.0 mmhos/cm)
Available water supply, 0 to 60 inches: Moderate (about 6.5 inches)
Interpretive groups
Land capability classification (irrigated): 3e
Land capability classification (nonirrigated): 4e
Hydrologic Soil Group: A
Ecological site: R067BY024CO - Sandy Plains
Hydric soil rating: No
Minor Components
Remmit
Percent of map unit: 10 percent
Hydric soil rating: No
Valent
Percent of map unit: 5 percent
Hydric soil rating: No
17
References
American Association of State Highway and Transportation Officials (AASHTO).
2004. Standard specifications for transportation materials and methods of sampling
and testing. 24th edition.
American Society for Testing and Materials (ASTM). 2005. Standard classification of
soils for engineering purposes. ASTM Standard D2487-00.
Cowardin, L.M., V. Carter, F.C. Golet, and E.T. LaRoe. 1979. Classification of
wetlands and deep -water habitats of the United States. U.S. Fish and Wildlife
Service FWS/OBS-79/31.
Federal Register. July 13, 1994. Changes in hydric soils of the United States.
Federal Register. September 18, 2002. Hydric soils of the United States.
Hurt, G.W., and L.M. Vasilas, editors. Version 6.0, 2006. Field indicators of hydric
soils in the United States.
N ational Research Council. 1995. Wetlands: Characteristics and boundaries.
Soil Survey Division Staff. 1993. Soil survey manual. Soil Conservation Service.
U .S. Department of Agriculture Handbook 18. http://www.nres.usda.gov/wps/portal/
nres/detai I/national/soils/?cid=nres 142p2_054262
Soil Survey Staff. 1999. Soil taxonomy: A basic system of soil classification for
making and interpreting soil surveys. 2nd edition. Natural Resources Conservation
Service, U.S. Department of Agriculture Handbook 436. http://
www.nres. usda.gov/wps/portal/nres/detail/national/soils/?cid=nres142p2_053577
Soil Survey Staff. 2010. Keys to soil taxonomy. 11th edition. U.S. Department of
Agriculture, Natural Resources Conservation Service. http://
www.nres.usda.gov/wps/portal/nres/detail/national/soils/?cid=nres142p2_053580
Tiner, R.W., Jr. 1985. Wetlands of Delaware. U.S. Fish and Wildlife Service and
Delaware Department of Natural Resources and Environmental Control, Wetlands
Section.
U nited States Army Corps of Engineers, Environmental Laboratory. 1987. Corps of
Engineers wetlands delineation manual. Waterways Experiment Station Technical
Report Y-87-1.
U nited States Department of Agriculture, Natural Resources Conservation Service.
N ational forestry manual. http://www.nres.usda.gov/wps/portal/nres/detail/soils/
home/?cid=nres 142 p2_053374
U nited States Department of Agriculture, Natural Resources Conservation Service.
N ational range and pasture handbook. http://www.nres.usda.gov/wps/portal/nres/
detail/national/landuse/rangepastu re/?cid=stelprdb 1043084
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Custom Soil Resource Report
U nited States Department of Agriculture, Natural Resources Conservation Service.
N ational soil survey handbook, title 430 -VI. http://www.nres.usda.gov/wps/portal/
nres/detail/soils/scientists/?cid=nres142p2 054242
U nited States Department of Agriculture, Natural Resources Conservation Service.
2006. Land resource regions and major land resource areas of the United States,
the Caribbean, and the Pacific Basin. U.S. Department of Agriculture Handbook
296. http://www.nres.usda.gov/wps/portal/nres/detail/national/soils/?
cid=nres 142p2_053624
U nited States Department of Agriculture, Soil Conservation Service. 1961. Land
capability classification. U.S. Department of Agriculture Handbook 210. http://
www.nres.usda.gov/Internet/FSE_DOCUMENTS/nres142p2_052290.pdf
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