HomeMy WebLinkAbout20153557.tiff SOIL SUITABILITY STATEMENT
WELD 34 , LLC
The subject property is situated in the Northwest Quarter of Section 18 , Township 5 North ,
Range 67 West of the 6' Principle Meridian , County of Weld , State of Colorado , or more
particularly located at the southeast corner of the intersection of US Highway 34 and Weld
County Road 13 .
The soil suitability information was obtained from the Web Soil Survey website
http ://websoilsurvey . nres . usda . qov/app/WebSoilSurvey . aspx
Eighty percent of the site consists of Wiley- Colby complex , 18% of the site consists of Nunn clay
loam , and 2% consists of Aquolls and Aquepts .
Ninety- eight percent of the site has a "somewhat limited " rating for small commercial buildings
and shallow excavations . The remaining 2% of the site is "very limited " , which is in the area of
the existing farm house and out- buildings . According to the Web Soil Survey website , small
commercial buildings are structures that are less than three stories high and do not have
basements . The foundation is assumed to consist of spread footings of reinforced concrete built
on undisturbed soil at a depth of 2 feet or a the depth of maximum frost penetration , whichever
is deeper . The ratings are based on the soil properties that affect the capacity of the soil to
support a load without movement and on the properties that affect excavation and construction
costs . Shallow excavations are trenches or holes dug to a maximum depth of 5 or 6 feet for
utility lines , open ditches or other purposes . The ratings are based on the soil properties that
influence the ease of digging and the resistance to sloughing .
Local Roads and Streets have an all -weather surface and carry automobile and light truck traffic
all year . They have a subgrade of cut or fill material , a base of gravel , crushed rock , or soil
material stabilized by lime or cement , and a surface of flexible material ( asphalt ) , rigid material
( concrete ) , or gravel with a binder . The ratings are based on the soil properties that affect the
ease of excavation and grading and the traffic- supporting capacity . Local roads and streets in
this project location have a "very limited " rating .
Unpaved Local Roads and Streets have a "very limited " rating . These roads and streets carry
traffic year round , but have a graded surface of local soil material or aggregate , such as
underlying local soil material , either in cut or fill , which is called "the sub- grade" , and the surface ,
which may be the same as the subgrade , or may have aggregate such as crushed limestone
added . These roads and streets are graded to shed water , and conventional drainage
measures are provided . These roads and streets are built mainly from the soil at the site .
The soil suitability is " somewhat limited " on 80% of the property ( in the Wiley- Colby complex
soils ) , and "very limited " on the remaining 20% for septic tank absorption fields .
Surface Water Management , System has a " not limited rating for the Wiley- Colby complex , and
" somewhat limited rating for the remaining soils . The ratings are based on the soil properties
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that affect the capacity of the soil to convey surface water across the landscape . Factors
affecting the system installation and performance are considered . Conveyances include graded
ditches and grassed waterways . The ratings are for soils in their natural condition , and do not
consider their present land use .
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USDA Natural Resources Web Soil Survey 4/21 /2015
Conservation Service National Cooperative Soil Survey Page 1 of 4
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Hydrologic Soil Group—Weld County,Colorado,Southern Part
Hydrologic Soil Group
Hydrologic Soil Group—Summary by Map Unit—Weld County,Colorado,Southern Part(CO618)
Map unit symbol Map unit name Rating Acres in AOI Percent of AOI
4 Aquolls and Aquepts. D 2.5 1.9%
flooded
41 Nunn clay loam,0 to 1 C 22.5 16.9%
percent slopes
42 Nunn clay loam, 1 to 3 C 2.5 1.9%
percent slopes
82 Wiley-Colby complex, 1 B 103.8 78.1%
to 3 percent slopes
83 Wiley-Colby complex,3 B 1.6 1.2%
to 5 percent slopes
Totals for Area of Interest 133.0 100.0%
USDA Natural Resources Web Soil Survey 4/21/2015
Conservation Service National Cooperative Soil Survey Page 3 of 4
Hydrologic Soil Group—Weld County,Colorado,Southern Part
Description
Hydrologic soil groups are based on estimates of runoff potential. Soils are
assigned to one of four groups according to the rate of water infiltration when the
soils are not protected by vegetation, are thoroughly wet, and receive precipitation
from long-duration storms.
The soils in the United States are assigned to four groups (A, B, C, and D) and
three dual classes (A/D, B/D, and C/D). The groups are defined as follows:
Group A. Soils having a high infiltration rate (low runoff potential)when thoroughly
wet. These consist mainly of deep, well drained to excessively drained sands or
gravelly sands. These soils have a high rate of water transmission.
Group B. Soils having a moderate infiltration rate when thoroughly wet. These
consist chiefly of moderately deep or deep, moderately well drained or well drained
soils that have moderately fine texture to moderately coarse texture. These soils
have a moderate rate of water transmission.
Group C. Soils having a slow infiltration rate when thoroughly wet. These consist
chiefly of soils having a layer that impedes the downward movement of water or
soils of moderately fine texture or fine texture.These soils have a slow rate of water
transmission.
Group D. Soils having a very slow infiltration rate (high runoff potential)when
thoroughly wet. These consist chiefly of clays that have a high shrink-swell
potential, soils that have a high water table, soils that have a claypan or clay layer
at or near the surface, and soils that are shallow over nearly impervious material.
These soils have a very slow rate of water transmission.
If a soil is assigned to a dual hydrologic group (A/D, B/D, or C/D), the first letter is
for drained areas and the second is for undrained areas. Only the soils that in their
natural condition are in group D are assigned to dual classes.
Rating Options
Aggregation Method: Dominant Condition
Component Percent Cutoff. None Specified
Tie-break Rule: Higher
USDA Natural Resources Web Soil Survey 4/21/2015
Conservation Service National Cooperative Soil Survey Page 4 of 4
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